guile/libguile/lightening/ChangeLog.lightning

2018-04-20 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_private.h: Add new register classes to
	flag float registers and double only registers, required for sparc64
	where only low 32 bit fpr registers can be used for single precision
	operations.
	Add new 128 bit jit_regset_t type for sparc64 register set.

	* include/lightning/jit_sparc.h, lib/jit_sparc-cpu.c, lib/jit_sparc-fpu.c,
	lib/jit_sparc-sz.c, lib/jit_sparc.c: Update for 64 bits sparc.

	* lib/lightning.c: Update for new jit_regset_t required for sparc64.

2018-02-26 Paulo Andrade <pcpa@gnu.org>

	* check/lightning.c, include/lightning.h: Add the new jit_va_push
	interface. That should be called when passing a va_list to a C
	function. This is required because on Alpha a va_list is passed
	by value, and lightning does not know about data types, so, cannot
	understand it is pushing a va_list as argument.

	* lib/jit_names.c, lib/lightning.c: Minor changes for the new
	jit_code_va_push.

	* check/cva_list.c: Update only test case using jit_va_push, to
	pass a va_list to a C function.

	doc/body.texi: Better documentation of the varargs interface.

	* jit_alpha.c, jit_alpha-cpu.c: Update to properly push a
	C va_list and correctly calculate varargs offset.

	* lib/jit_aarch64-sz.c, lib/jit_aarch64.c, lib/jit_alpha-sz.c,
	lib/jit_arm-sz.c, lib/jit_arm.c, lib/jit_hppa-sz.c, lib/jit_hppa.c,
	lib/jit_ia64-sz.c, lib/jit_ia64.c, lib/jit_mips-sz.c, lib/jit_mips.c,
	lib/jit_ppc-sz.c, lib/jit_ppc.c, lib/jit_s390-sz.c, lib/jit_s390.c,
	lib/jit_sparc-sz.c, lib/jit_sparc.c, lib/jit_x86-sz.c, lib/jit_x86.c:
	Update for the new jit_va_push interface.

2018-02-22 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_alpha-cpu.c: Always set t12 to the address of the
	current function, to properly work on all systems. Previously
	the shortcut did only work on Tru64. For Linux and glibc the
	change is required.

2018-02-22 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_aarch64.c, lib/jit_alpha.c, lib/jit_arm.c,
	lib/jit_mips.c, lib/jit_ppc.c, lib/jit_sparc.c, lib/jit_x86.c:
	Correct wrong logic in usage of jit_live in jit_retr. The
	problem is that if a temporary is required during epilog,
	the return register might be allocated, so, jit_live must always
	be used.

2018-01-31 Paulo Andrade <pcpa@gnu.org>

	* lib/lightning.c: Avoid deep recursions when computing live
	register ranges.

2018-01-31 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_mips-cpu.c: Correct frame size and varargs
	initialization for the n32 abi.
	* lib/jit_mips.c, lib/jit_mips-fpu.c: Correct 32 bit abis
	in big-endian.

2017-09-13 Paulo Andrade <pcpa@gnu.org>

	* configure.ac: Add check for binutils 2.29 prototype to the
	disassembler function.
	* lib/jit_disasm.c: Adapt for binutils 2.29 change.

2017-06-09 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_private.h, lib/lightning.c: Add a
	second pass from start when computing register live ranges.
	This should be used temporarily, and is required for certain
	loop constructs, with several consecutive blocks not referencing
	a live register.

2016-05-05 Paulo Andrade <pcpa@gnu.org>

	* lib/lightning.c: Correct wrong movr simplification,
	remove no longer needed code to set return registers live
	and update live register set when reaching a label boundary,
	but do not descend if the block has been already visited.
	The later need some tuning for complex code generation, where
	it will still have issues.

2015-11-30 Paulo Andrade <pcpa@gnu.org>

	* doc/body.texi: Change documentation to no longer say
	it is a variant of the Fibonacci sequence, and document
	a proper implementation.
	Thanks to Jon Arintok for pointing out that the Fibonacci
	sequence generation was incorrect. It was documented, but
	still confusing.

	* check/fib.tst, check/fib.ok, check/bp.tst, check/bp.ok,
	doc/ifib.c, doc/rbif.c: Implement a proper Fibonacci
	sequence implementation.

2015-07-03 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_mips-cpu.c: Correct definition of htonr_ul.
	Correct prolog/epilog/va* routines to work on o64 abi.

	* lib/jit_mips-fpu.c: Correct load of double literal
	argument when not using a data buffer.
	Remove alignment correction in vaarg_d if using the
	new mips abi.

	* lib/jit_mips.c: Correct code to allow creating variadic
	jit functions when using the new mips abi.

	* lib/jit_rewind.c: Minor adjust for rewind when using
	the new mips abi, if there are varargs arguments in
	registers.

2015-06-06 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_ia64-cpu.c: Search backward for the last output
	register used, otherwise would stop too early if a float
	argument used the slot.
	Correct offset of first va_list argument, and use proper
	va_list abi.

	* lib/jit_ia64-fpu.c: Add new functions to move a gpr
	to a fpr register, to counterpart the ones that move a
	fpr to a gpr. These are required to properly implement
	jit_getarg*_{f,d} on complex prototypes, or variadic
	jit functions.

	* lib/jit_ia64-sz.c: Update for support to jit variadic
	functions.

	* lib/jit_ia64.c: Implement proper abi for variadic
	jit functions.

2015-06-04 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_rewind.c: New file implementing generic functions
	to "rewind", or rewrite IR code sequences.

	* include/lightning.h: Add several new codes, that previously
	were a function call, that would synthesize the operation.
	Now, there is a code for the operation, and a new flag to
	know an operation is synthesized.

	* include/lightning/jit_private.h: Add several new macros to
	help construct synthesized IR code sequences.

	* lib/Makefile.am: Update for lib/jit_rewind.c.

	* lib/jit_disasm.c: Update for a small rework on jit_node_t,
	so that --enable-devel-disassembler does not need a change
	in the layout of jit_node_t.

	* lib/jit_names.c: Update for the new codes.

	* lib/jit_print.c: Update to print more readable output, and
	flag synthesized IR code sequences.

	* lib/jit_aarch64-sz.c, lib/jit_aarch64.c,
	lib/jit_arm-sz.c, lib/jit_arm.c, lib/jit_x86-sz.c,
	lib/jit_x86.c: Update for new synthesized IR code sequences.

	* lib/jit_ppc-cpu.c, lib/jit_ppc-fpu., lib/jit_ppc-sz.c,
	lib/jit_ppc.c, lib/jit_mips-cpu.c, lib/jit_mips-fpu.c,
	lib/jit_mips-sz.c, lib/jit_mips.c, lib/jit_s390-fpu.c,
	lib/jit_s390-sz.c, lib/jit_s390.c: Update for new synthesized
	IR code sequences and correct bugs in the initial varargs
	implementation support.

	* lib/jit_alpha-sz.c, lib/jit_alpha.c, lib/jit_hppa-sz.c,
	lib/jit_hppa.c, lib/jit_ia64-sz.c, lib/jit_ia64.c,
	lib/jit_sparc-sz.c, lib/jit_sparc.c: Add generic, untested
	support for the new synthesized	IR code sequences. Known
	most likely broken right now, and should be corrected once
	access to these hosts is available.

	* lib/lightning.c: Update for new IR codes, and add support
	for not yet existing instructions that change third argument.

	* size.c: Change to use different tables for LE and BE PowerPC.
	Correct a wrong endif for x32.

2015-05-25 Paulo Andrade <pcpa@gnu.org>

	* check/cva_list.c: New file implementing a test to ensure
	the value returned by jit_va_start is a valid C va_list.

	* check/va_list.ok: New simple helper file, as now the
	va_list.tst test is enabled.

	* check/va_list.tst: Rewritten for an extensive variadic
	jit functions test.

	* check/Makefile.am: Update for the new tests.

	* lib/jit_arm-cpu.c, lib/jit_arm-swf.c, lib/jit_arm-vfp.c,
	lib/jit_arm.c: Correct broken software float in a previous
	commit. Note that the hard float abi implementation is known
	broken at this time, for special cases involving variadic
	functions, and should be corrected next.

	lib/jit_x86-cpu.c, lib/jit_x86-sz.c, lib/jit_x86.c: Correct
	the jit_va_list_t semantics to match C va_list.

2015-05-24 Paulo Andrade <pcpa@gnu.org>

	* lib/Makefile.am: Bump library major. This is a preparation
	for a rework that was due for quite some time, but that is
	now required to properly implement variadic jit functions.
	The rework is mainly required to know at prolog parsing, if
	a function is variadic or not. This will benefit a few
	backends, and is mandatory for the hard float arm abi.
	The rework was already planned for quite some time, to
	be able to use a variable stack framesize, and for leaf
	functions optimization where applicable.
	The change will be source compatible, but will change
	some internals, and jit_code_t values, as some new will
	be added.
	The only behavior change is that, jit_arg_register_p may
	change return value on hard float arm abi, if called before
	or after jit_ellipsis. Common sense anyway, would say to
	make that call after jit_ellipsis, but documentation
	should be updated for it.

2015-05-24 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_aarch64-fpu.c, lib/jit_aarch64.c: Correct base
	aarch64 varargs code.

2015-05-24 Paulo Andrade <pcpa@gnu.org>

	* check/lightning.c: Clearly run check if clang is the system
	compiler.

2015-05-20 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_sparc-cpu.c, lib/jit_sparc-fpu.c, lib/jit_sparc.c:
	Add base support to jit vararg functions to the sparc backend.

2015-05-20 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_alpha-cpu.c, lib/jit_alpha-fpu.c, lib/jit_alpha.c:
	Add base support to jit vararg functions to the alpha backend.

2015-05-19 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_hppa-cpu.c, lib/jit_hppa-fpu.c, lib/jit_hppa.c:
	Add base support to jit vararg functions to the hppa backend.

2015-05-10 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_ia64-cpu.c, lib/jit_ia64-fpu.c, lib/jit_ia64.c:
	Add base support to jit vararg functions to the ia64 backend.

2015-05-10 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_ia64-fpu.c, lib/jit_ia64.c: Correct movi_d_w
	and movi_f_w implementation to work when not using a
	data buffer. This causes the check varargs.tst to
	work when passing "-d" to the lightning test tool.

2015-05-10 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_ia64.c: Implement inline assembly cache flush,
	required on multiprocessor systems.

2015-05-06 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_mips-cpu.c, lib/jit_mips-fpu.c, lib/jit_mips.c:
	Add base support to jit vararg functions to the mips backend.
	Currently only supported on the o32 abi, until access to a
	n32 system is arranged.

2015-05-05 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_ppc-cpu.c, lib/jit_ppc-fpu.c, lib/jit_ppc.c:
	Add base support to jit vararg functions to the PowerPC backend.

2015-05-02 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_s390-cpu.c, lib/jit_s390-fpu.c, lib/jit_s390.c:
	Add base support to jit vararg functions to the s390 backend.

2015-05-01 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_arm-cpu.c, lib/jit_arm-swf.c, lib/jit_arm-vfp.c,
	lib/jit_arm.c: Add base support to jit vararg
	functions to the arm backend.

2015-04-30 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_aarch64-cpu.c, lib/jit_aarch64-fpu.c,
	lib/jit_aarch64.c: Add base support to jit vararg
	functions to the aarch64 backend.

2015-04-27 Paulo Andrade <pcpa@gnu.org>

	* include/lightning.h, include/lightning/jit_private.h,
	lib/jit_names.c, lib/lightning.c: Add initial support
	for the new jit_va_start, jit_va_arg, jit_va_arg_d, and
	jit_va_end interfaces. The jit_va_start call is supposed
	to return a va_list compatible pointer, but not yet
	decided if it will be "declared" stdarg compatible,
	as for now only x86 support has been added (and should
	be compatible), but issues may arise on other backends.

	* check/lightning.c: Add wrappers to call the new jit_va_*
	interfaces.

	* lib/jit_x86-cpu.c, lib/jit_x86.c: Implement the new
	jit_va_* for x86.

	* lib/jit_x86-sz.c: Add fields, but not yet fully updated,
	as this is an intermediate commit.

	* lib/jit_aarch64-sz.c, lib/jit_aarch64.c,
	lib/jit_alpha-sz.c, lib/jit_alpha.c,
	lib/jit_arm-sz.c, lib/jit_arm.c,
	lib/jit_hppa-sz.c, lib/jit_hppa.c,
	lib/jit_ia64-sz.c, lib/jit_ia64.c,
	lib/jit_mips-sz.c, lib/jit_mips.c,
	lib/jit_ppc-sz.c, lib/jit_ppc.c,
	lib/jit_s390-sz.c, lib/jit_s390.c,
	lib/jit_sparc-sz.c, lib/jit_sparc.c: Prepare for the
	new jit_va_* interfaces. Not yet implemented, and will
	cause an assertion if used.

	* check/va_list.tst: Simple early test case, that works
	on x86_64, x32, ix86, cygwin, and cygwin64.

2015-02-17 Paulo Andrade <pcpa@gnu.org>

	* include/lightning.h, include/lightning/jit_private.h,
	lib/jit_aarch64-cpu.c, lib/jit_aarch64.c,
	lib/jit_alpha-cpu.c, lib/jit_alpha.c,
	lib/jit_arm-cpu.c, lib/jit_arm.c,
	lib/jit_hppa-cpu.c, lib/jit_hppa.c,
	lib/jit_ia64-cpu.c, lib/jit_ia64.c,
	lib/jit_mips-cpu.c, lib/jit_mips.c,
	lib/jit_ppc-cpu.c, lib/jit_ppc.c,
	lib/jit_s390-cpu.c, lib/jit_s390.c,
	lib/jit_sparc-cpu.c, lib/jit_sparc.c,
	lib/jit_x86-cpu.c, lib/jit_x86.c: Implement the new
	jit_allocar(offs, size) interface, that receives
	two integer registers arguments, allocates space
	dynamically in the stack, returns the offset in
	the first argument, and uses the second argument
	for the size in bytes of the memory to be allocated.

	* check/allocar.ok, check/allocar.tst: New files
	implementing test cases for the new jit_allocar
	interface.

	* check/Makefile.am, check/lightning.c: Update for
	the new test case and interface.

	* doc/body.texi: Add documentation of the new
	interface.

2015-02-17 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_x86.h, lib/jit_x86-cpu.c,
	lib/jit_x86-x87.c: No longer make st(7) available.
	Need to keep one x87 slots empty to avoid exceptions.
	This has the side effect of no longer needing the
	hackish emms instruction before a function call.

2015-02-16 Paulo Andrade <pcpa@gnu.org>

	* lib/lightning.c: Remove the jit_regno_patch bitfield
	register fields before actual emit, as it is only really
	used before emit, otherwise, on special	conditions it
	may consider live registers as dead during code emit.

2015-02-15 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_x86-cpu.c, lib/jit_x86-sse.c, lib/jit_x86-x87.c:
	Correct encoding of ldxr* stxr* in the x32 abi. If the
	displacement register is negative, it would generate
	a 64 bit instruction with a 32 bit unsigned displacement.

	* check/ranger.tst, check/ranger.ok: New files, implementing
	a test case for negative loads and stores. This is range.tst
	converted to use registers instead of immediate offsets.

	check/Makefile.am: Update for the new test case.

2015-02-07 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_size.c: Preventively use at least 144 bytes
	if JIT_INSTR_MAX is less than it. The logic is not
	guaranteed to be 100% precise, it is mostly heuristics
	to allocate a buffer with as close as possible size,
	but a wrong value may cause code generation to write
	past the end of the buffer.

2015-02-03 Paulo Andrade <pcpa@gnu.org>

	* lib/lightning.c: Correct the reason the bug in
	simplify_stxi was not triggered before, it was due to
	incorrectly resetting the value->code field, what was
	causing it to never properly optimize:
		stxi Im0 Rb0 Rt0
		ldxi Rt1 Rb1 Im1
	when Rb0 == Rb1, Rt0 == Rt1 and Im0 == Im1
	There was another possible issue, that has been also
	addressed in this commit, that would be the case of
	Rbn == Rtn, where no redundancy removal is possible.

2015-02-03 Paulo Andrade <pcpa@gnu.org>

	* lib/lightning.c: Correct wrong check in simplify_stxi.
	The test was incorrectly comparing the target register
	and the displacement offset. This was a time bomb bug,
	that would trigger in code like:
		stxi Im0 Rb0 Rt0
		stxi Im1 Rb1 Rt1
	if Rb0 == Rb1 && Rt0 == Rt1 && Im0 == Rt1, that is,
	the wrong check was Im0 == Rt1, instead of the supposed
	Im0 == Imm1 (that was what the code mean't to do). It
	was removing the second stxi assuming it was redundantly
	generated; as that is not uncommon pattern on
	translators generating jit.

2015-02-02 Paulo Andrade <pcpa@gnu.org>

	* configure.ac, include/lightning/jit_private.h,
	lib/jit_aarch64.c, lib/jit_alpha.c, lib/jit_arm.c,
	lib/jit_disasm.c, lib/jit_hppa.c, lib/jit_ia64.c,
	lib/jit_mips.c, lib/jit_ppc.c, lib/jit_print.c,
	lib/jit_s390.c, lib/jit_sparc.c, lib/jit_x86.c: Add a new
	--enable-devel-disassembler option, that should be used
	during development, or lightning debug. This option
	intermixes previous jit_print and jit_disassemble
	output, making it easier to visualize what lightning
	call was used, and what code was generated.

2015-01-31 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_arm-cpu.c, lib/jit_arm.c: Only limit to 24 bit
	displacement non conditional jump in the same jit_state_t.

2015-01-19 Paulo Andrade <pcpa@gnu.org>

	* doc/body.texi: Reorder documentation, making jit_frame
	and jit_tramp the lightning response to the need of
	trampolines, continuations and tail call optimizations.
	A pseudo code example of a factorial function was added.
	Also added a section for description of the available
	predicates.

	* doc/fact.c: New file, implementing a simple example of
	a translation of a trivial, recursive, tail call optimization
	into lightning calls. This is the conversion to functional C
	code of the example in doc/body.texi.

	* doc/Makefile.am: Update for the next test case.

2015-01-17 Paulo Andrade <pcpa@gnu.org>

	* include/lightning.h, lib/jit_aarch64.c,
	lib/jit_alpha.c, lib/jit_arm-vfp.c, lib/jit_arm.c,
	lib/jit_hppa.c,	lib/jit_ia64.c, lib/jit_mips.c,
	lib/jit_ppc.c, lib/jit_s390.c, lib/jit_sparc.c,
	lib/jit_x86.c: Add the new jit_arg_register_p predicate.
	The predicate is expected to be used to know if an
	argument is in a register, what would need special
	handling if code that can overwrite non callee save
	registers is executed.

	* check/carg.c: New test case to check consistency and
	expected usage of jit_arg_register_p.

	* check/Makefile.am: Update for new test case.

2015-01-17 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_aarch64.h,
	include/lightning/jit_alpha.h,
	include/lightning/jit_arm.h,
	include/lightning/jit_hppa.h,
	include/lightning/jit_mips.h,
	 include/lightning/jit_ppc.h,
	include/lightning/jit_s390.h,
	include/lightning/jit_sparc.h,
	include/lightning/jit_x86.h,
	lib/jit_aarch64.c, lib/jit_alpha.c,
	lib/jit_arm.c, lib/jit_hppa.c,
	lib/jit_ia64.c, lib/jit_mips.c,
	lib/jit_ppc.c, lib/jit_s390.c,
	lib/jit_sparc.c, lib/jit_x86.c: Remove jit_arg_reg_p and
	jit_arg_f_reg_p from a public header, and define it only
	on port specific files where an integer offset is used
	to qualify an argument identifier. Exported code expects
	an opaque pointer (but of jit_node_t* type) to "qualify"
	an argument identifier.
	This patch, and the code review/simplification done during
	it also corrected some bugs:
	o Inconsistent jit_arg_d value of double argument after 3
	  integer arguments in arm for jit_functions; tested, C
	  functions were being properly called.
	o Inconsistent use of getarg_{f,d} and putarg*_{f,d} on
	  s390 (32-bit) that happened to not have a proper test
	  case, as it would only happen for jit functions, and
	  tested, called C functions had proper arguments.
	o Corrected a "last minute" correction that did not go
	  to the committed version, and would not compile on hppa,
	  due to bad _jit_putargi_d prototype definition.

2015-01-17 Paulo Andrade <pcpa@gnu.org>

	* doc/body.texi: Correct wrong/outdated information for
	hton*, pusharg* and ret*, and add missing documentation
	for rsb*, qmul*, qdvi* and putarg*.

2015-01-15 Paulo Andrade <pcpa@gnu.org>

	* configure.ac, lib/jit_disasm.c: Rewrite workaround
	to apparent problem to initialize powerpc disassembler.

2015-01-15 Paulo Andrade <pcpa@gnu.org>

	* include/lightning.h, lib/jit_aarch64.c,
	lib/jit_alpha.c, lib/jit_arm.c, lib/jit_hppa.c,
	lib/jit_ia64.c, lib/jit_mips.c,	lib/jit_ppc.c,
	lib/jit_s390.c, lib/jit_sparc.c, lib/jit_x86.c:
	Implement jit_putarg*. It works as a mix of jit_getarg*
	and jit_pusharg*, in the way that the first argument is
	a register or immediate, and the second is a pointer
	returned by jit_arg*. The use of the interface is to change
	values of arguments to the current jit function.

	* check/put.ok, check/put.tst: New test cases exercising
	the new jit_putarg* interface.

	* check/Makefile.am, check/lightning.c: Update for the
	new test case and interface.

2015-01-08 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_s390.h, lib/jit_s390-cpu.c,
	lib/jit_s390-fpu.c, lib/jit_s390-sz.c, lib/jit_s390.c:
	Renamed s390x* files to s390*.

	* check/float.tst, check/lightning.c, configure.ac,
	include/lightning.h, include/lightning/Makefile.am,
	lib/Makefile.am, lib/jit_s390.c, lib/jit_size.c,
	lib/lightning.c: Update for renamed files.

2015-01-08 Paulo Andrade <pcpa@gnu.org>

        * include/lightning.h, include/lightning/jit_private.h,
        include/lightning/jit_s390x.h, lib/jit_disasm.c,
        lib/jit_s390x-cpu.c, lib/jit_s390x-fpu.c, lib/jit_s390x-sz.c,
        lib/jit_s390x.c, lib/jit_size.c, lib/lightning.c:
	Add support for generating jit for s390 32 bit. This change
	also removed %f15 from the list of temporaries fpr registers;
	it was not being used, but if were, it would corrupt the
	stack frame because the spill address would overwrite grp
	offsets.

2014-12-26 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_ppc-cpu.c, lib/jit_ppc.c: Correct some endianess issues
	on the powerpc le backend.

2014-12-26 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_ppc-cpu.c: Add mcrxr instruction emulation,
	as this instruction has been phased out, and should be
	implemented as a kernel trap.

2014-12-26 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_arm.c: Better check for need to flush constants
	before the pool being no longer reachable.

2014-12-25 Paulo Andrade <pcpa@gnu.org>

	* include/lightning.h: Split jit_htonr in the new 3 interfaces
	jit_htonr_us, jit_htonr_ui and jit_htonr_ul, the later only
	available on 64 bit. The plain/untyped jit_htonr macro call
	maps to the wordsize one.
	* lib/jit_aarch64-cpu.c,  lib/jit_aarch64-sz.c, lib/jit_aarch64.c,
	lib/jit_alpha-cpu.c, lib/jit_alpha-sz.c, lib/jit_alpha.c,
	lib/jit_arm-cpu.c, lib/jit_arm-sz.c, lib/jit_arm.c,
	lib/jit_hppa-cpu.c, lib/jit_hppa-sz.c, lib/jit_hppa.c,
	lib/jit_ia64-cpu.c, lib/jit_ia64-sz.c, lib/jit_ia64.c,
	lib/jit_mips-cpu.c, lib/jit_mips-sz.c, lib/jit_mips.c,
	lib/jit_ppc-cpu.c, lib/jit_ppc-sz.c, lib/jit_ppc.c,
	lib/jit_s390x-cpu.c, lib/jit_s390x-sz.c, lib/jit_s390x.c,
	lib/jit_sparc-cpu.c, lib/jit_sparc-sz.c, lib/jit_sparc.c,
	lib/jit_x86-cpu.c, lib/jit_x86-sz.c, lib/jit_x86.c:
	Update backends for the new jit_htonr*.
	* check/lightning.c, lib/jit_names.c, lib/lightning.c:
	Update for the new jit_htonr* interfaces.
	* check/Makefile.am: Update for new test cases.
	* check/hton.ok, check/hton.tst: New test cases.

2014-12-24 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_private.h, include/lightning/jit_x86.h,
	lib/jit_disasm.c, lib/jit_x86-cpu.c, lib/jit_x86-sse.c,
	lib/jit_x86-sz.c, lib/jit_x86-x87.c, lib/jit_x86.c,
	size.c: Implement support for the x32 abi. Built and
	tested on Gentoo default/linux/amd64/13.0/x32 profile.

2014-12-24 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_names.c: Add missing rsbi_f and rsbi_d strings.

2014-12-21 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_arm.c: Call __clear_cache for every page.
	This should only be required for older boards or
	toolchain setup, but has been reported to be required
	for lightning at some point.

2014-12-21 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_arm.c: Correct check to guard overflow of index
	of constants from program counter.

2014-11-24 Paulo Andrade <pcpa@gnu.org>

	* lib/lightning.c: Remove an optimization to calee save
	registers that may incorrectly remove a jit_movr under
	special conditions.

2014-11-20 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_ppc.h, lib/jit_ppc-cpu.c,
	lib/jit_ppc.c: Add initial powerpc le support.

2014-11-20 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_disasm.c: Change thumb or arm disassemble based on
	jit code before disassembly.

	* lib/jit_arm-cpu.c: Correct reversed arguments to LDRD and
	STRD instructions, and correct checking for support of those.

	* lib/jit_arm-swf.c: Correct wrong use of LDRD and STRD and
	only use those if the register is even.

	* check/check.arm.swf.sh, check/check.arm4.swf.sh: New files
	to test LDRD and STRD, as well as the alternate code path
	when those are not available, in the .arm4. test case.

	* check/Makefile.am: Update for the new test cases.

2014-11-08 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_private.h, lib/jit_aarch64.c,
	lib/jit_alpha.c, lib/jit_arm.c, lib/jit_hppa.c,
	lib/jit_ia64.c, lib/jit_mips.c, lib/jit_ppc.c,
	lib/jit_s390x.c, lib/jit_sparc.c, lib/jit_x86.c:
	Implement a private jit_flush call, that flushes
	the cache, if applicable, aligning down to the
	previous and up to the next page boundary.

2014-11-08 Paulo Andrade <pcpa@gnu.org>

	* check/ctramp.c: New file. It just repeats the test
	of tramp.tst, but using two jit_state_t, what should
	test possible issues with two contexts, and also validate
	jit_tramp works on backends with function descriptions.

	* check/Makefile.am: Update for new test case.

2014-11-03 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_mips.h: Do not make the t9 register
	JIT_R11 (or JIT_R7 for n32 or n64 abi) available. Previously
	it cause problems if one expects it to not be changed in a
	function call. For example, calling a jit function, where it
	really does not need to be changed.

2014-10-26 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_aarch64.c, lib/jit_alpha.c, lib/jit_arm.c,
	lib/jit_hppa.c, lib/jit_ia64.c, lib/jit_mips.c, lib/jit_ppc.c,
	lib/jit_s390x.c, lib/jit_sparc.c, lib/jit_x86.c: Add an
	assertion to all code generation "drivers" to ensure
	_jitc->regarg is empty or in an expected state, after
	translation of a lightning instruction to native code.
	This change was a brute force test to find out other cases
	of a temporary not being release (like was happening with
	_bmsi and _bmci on x86), but no other case was found,
	after running make check, with assertions enabled, on all
	backends.

2014-10-26 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_x86-cpu.c: Correct a register allocation leak in
	_bmsi and _bmci.

2014-10-25 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_disasm.c: Do not cause an fatal error if init_jit
	fails in the jit_init_debug call.

2014-10-24 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_ia64.c, lib/jit_ppc.c: Correct handling of function
	descriptor when first prolog is a jit_tramp prolog. The
	test case was using the same jit_context_t, so was not
	triggering this condition.

	* lib/jit_ppc-cpu.c: Properly handle jump displacements that
	do not fit on 24 powerpc. This required changing from previous
	"mtlr reg, blr" to "mtctr reg, bctr" to properly handle
	the logic to "hide" function descriptors, but that would
	also be required as the proper jit_jmpr when/if implementing
	optimizations to leaf functions (was working with blr because
	it is saved/reloaded in prolog/epilog).

2014-10-21 Paulo Andrade <pcpa@gnu.org>

	* include/lightning.h, lib/lightning.c: Add three predicates
	to query information about labels. jit_forward_p(label)
	will return non zero if the label is "forward", that is
	need a call to jit_link(label), jit_indirect_p(label)
	that returns non zero if the label was created with the
	jit_indirect() call, and jit_target_p(label) that will
	return non zero if there is at least one jump patched
	to land at that label.

2014-10-18 Paulo Andrade <pcpa@gnu.org>

	* check/range.ok, check/range.tst: New test case designed
	to catch incorrect code generation, usually due to incorrect
	test of immediate size. The test checks a large amount of
	encodings in "power of two" boundaries. This test exorcises
	a significant amount of code paths that was previously not
	tested.

	* check/Makefile.am: Add range test to make check target.

	* lib/jit_aarch64-cpu.c: Correct wrong address calculation
	for stxi_c, stxi_s, stxi_i and stxi_l when the offset is
	too large.

        * lib/jit_mips-fpu.c: Correct wrong size test to check if
	an immediate can be encoded in a float or double store.

	* lib/jit_s390x-cpu.c: Correct inverted encoding to stxi_s
	when the offset cannot be encoded, and fallbacks to an
	alternate encoding in 2 instructions.

2014-10-17 Paulo Andrade <pcpa@gnu.org>

	* check/alu_rsb.ok, check/alu_rsb.tst: New files implementing
	tests for jit_rsb*.

	* check/Makefile.am, check/lightning.c, include/lightning.h,
	lib/jit_aarch64-cpu.c, lib/jit_aarch64-fpu.c, lib/jit_aarch64-sz.c,
	lib/jit_aarch64.c, lib/jit_alpha-cpu.c, lib/jit_alpha-fpu.c,
	lib/jit_alpha-sz.c, lib/jit_alpha.c, lib/jit_arm-cpu.c,
	lib/jit_arm-swf.c, lib/jit_arm-sz.c, lib/jit_arm-vfp.c,
	lib/jit_arm.c, lib/jit_hppa-cpu.c, lib/jit_hppa-fpu.c,
	lib/jit_hppa-sz.c, lib/jit_hppa.c, lib/jit_ia64-cpu.c,
	lib/jit_ia64-fpu.c, lib/jit_ia64-sz.c, lib/jit_ia64.c,
	lib/jit_mips-cpu.c, lib/jit_mips-fpu.c, lib/jit_mips-sz.c,
	lib/jit_mips.c, lib/jit_names.c, lib/jit_ppc-cpu.c,
	lib/jit_ppc-fpu.c, lib/jit_ppc-sz.c, lib/jit_ppc.c,
	lib/jit_s390x-cpu.c, lib/jit_s390x-fpu.c, lib/jit_s390x-sz.c,
	lib/jit_s390x.c, lib/jit_sparc-cpu.c, lib/jit_sparc-fpu.c,
	lib/jit_sparc-sz.c, lib/jit_sparc.c, lib/jit_x86-cpu.c,
	lib/jit_x86-sse.c, lib/jit_x86-sz.c, lib/jit_x86-x87.c,
	lib/jit_x86.c, lib/lightning.c: Implement jit_rsb*. This
	was a missing lightning 1.x interface, that on most
	backends is synthesized, but on a few backends (hppa and ia64),
	it can generate better code as on those there is, or the
	only instruction with an immediate is in "rsb" format
	(left operand).

2014-10-17 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_names.c: New file with single definition of string
	representation of lightning IR codes.

	* size.c: Modified to append the code name in a C comment
	after the maximum instruction size.

	* lib/jit_print.c: Minor change to not duplicate jit_names.c
	contents.

	* lib/jit_aarch64-sz.c, lib/jit_alpha-sz.c, lib/jit_arm-sz.c,
	lib/jit_hppa-sz.c, lib/jit_ia64-sz.c, lib/jit_mips-sz.c,
	lib/jit_ppc-sz.c, lib/jit_s390x-sz.c, lib/jit_sparc-sz.c,
	lib/jit_x86-sz.c: Rewritten to add string representation of
	IR codes in a C comment.

2014-10-14 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_aarch64-cpu.c, lib/jit_alpha-cpu.c, lib/jit_arm-cpu.c,
	lib/jit_hppa-cpu.c, lib/jit_mips-cpu.c, lib/jit_ppc-cpu.c,
	lib/jit_sparc-cpu.c: Implement or correct the internal
	nop(count) call that receives an argument that tells the
	modulo bytes to align the code for the next instruction.

	* include/lightning.h, lib/lightning.c, lib/jit_aarch64.c,
	lib/jit_alpha.c, lib/jit_arm.c, lib/jit_hppa.c, lib/jit_ia64.c,
	lib/jit_mips.c, lib/jit_ppc.c, lib/jit_s390x.c, lib/jit_sparc.c,
	lib/jit_x86.c: Implement the new jit_align() call that receive
	an argument, that tells the modulo, in bytes, to align the
	next instruction. In most backends the only value that makes
	a difference is a value that matches sizeof(void*), as all
	other values usually are already automatically aligned in
	labels, but not guaranteed to be aligned at word size bytes.

	* check/align.ok, check/align.tst: New files, implementing
	a simple test for the new jit_align() interface.

	* check/Makefile.am, check/lightning.c, lib/jit_aarch64-sz.c,
	lib/jit_alpha-sz.c, lib/jit_arm-sz.c, lib/jit_hppa-sz.c,
	lib/jit_ia64-sz.c, lib/jit_mips-sz.c, lib/jit_ppc-sz.c,
	lib/jit_print.c, lib/jit_s390x-sz.c, lib/jit_sparc-sz.c,
	lib/jit_x86-sz.c: Update for the new jit_code_align code and
	the jit_align() interface.

2014-10-13 Paulo Andrade <pcpa@gnu.org>

	* include/lightning.h, lib/jit_size.c, size.c: Use a
	symbolic value for the last IR code.

2014-10-12 Paulo Andrade <pcpa@gnu.org>

	* include/lightning.h, include/lightning/jit_private.h,
	lib/jit_aarch64-cpu.c, lib/jit_alpha-cpu.c, lib/jit_arm-cpu.c,
	lib/jit_hppa-cpu.c, lib/jit_ia64-cpu.c, lib/jit_mips-cpu.c,
	lib/jit_ppc-cpu.c, lib/jit_s390x-cpu.c, lib/jit_sparc-cpu.c,
	lib/jit_x86-cpu.c, lib/lightning.c: Implement the new
	jit_frame and jit_tramp interfaces, that allow writing
	trampoline like calls, where a single dispatcher jit buffer
	is written, and later other jit buffers are created, with
	the same stack frame layout as the dispatcher. This is the
	logic that GNU Smalltalk used in lightning 1.x, and is required
	to make a sane port for lighting 2.x.

	* jit_ia64-cpu.c: Implement support for jit_frame and jit_tramp,
	and also correct wrong encoding for B4 instructions, that
	implement jmpr, as well as correct reverse logic in _jmpr,
	that was moving the branch register to the jump register,
	and not vice-versa.
	Also, if a stack frame is to be assumed, always assume it may
	call a function with up to 8 arguments, regardless of the
	hint frame argument.

	* lib/jit_arm.c: Add a new must_align_p() interface to ensure
	function prologs are always aligned. This condition was
	previously always true, somewhat by accident, but with
	jit_tramp it is not guaranteed.

	* jit_ia64-cpu.c: lib/jit_ppc.c: Add minor special handling
	required to implement jit_tramp, where a function descriptor
	should not be added before a prolog, as jit_tramp means omit
	prolog.

	* check/lightning.c: Update test driver for the new interfaces.

	* check/Makefile.am, check/tramp.tst, check/tramp.ok: Add
	a simple test and example of the jit_frame and jit_tramp
	usage implementing a simple Fibonacci function using a
	simulation of an interpreter stack and how it would handle
	state in language specific variables.

	* doc/body.texi: Add documentation for jit_frame and
	jit_tramp.

2014-09-29 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_aarch64.c, lib/jit_alpha.c, lib/jit_arm.c,
	lib/jit_hppa.c, lib/jit_ia64.c, lib/jit_mips.c,
	lib/jit_ppc.c, lib/jit_s390x.c, lib/jit_sparc.c,
	lib/jit_x86.c, lib/lightning.c: Allow jit_jmpi on a
	target that is not a node. This may lead to hard to
	debug code generation, but is a required feature for
	certain generators, like the ones that used lightning
	1.2x. Note that previously, but not really well
	documented, it was instructed to use:
	jit_movi(rn, addr); jit_jmpr(rn);
	but now, plain:
	jit_patch_abs(jit_jmpi(), addr);
	should also work.

2014-09-24 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_x86-sz.c: Generate information about instruction
	lengths for more precise calculation of buffer size on
	Windows x64. This change is specially important because
	the maximum instruction length is larger than other
	systems, what could cause an out of bounds write on
	special conditions without this update.

2014-09-24 Paulo Andrade <pcpa@gnu.org>

	* check/lightning.c: Add workaround to conflicting global
	optind variable in cygwin binutils that have an internal
	getopt* implementation.

	* lib/jit_x86-cpu.c: Add a simple define ffsl ffs if building
	for 32 bit and there is no ffsl function.

2014-09-24 Paulo Andrade <pcpa@gnu.org>

        * check/lightning.c: Add a hopefully temporary kludge to not use
	sprintf and sscanf returned by dlsym. This is required to pass
	the varargs test.

        * include/lightning/jit_private.h: Use symbolic name for first
	integer register argument, as this is different in sysv and
	win64 abi.

        * include/lightning/jit_x86.h: Add conditionals and definitions
	for Windows x64 (under __CYGWIN__ preprocessor conditional).

        * lib/jit_x86-cpu.c: Correct one instruction encoding bug, that
	was working by accident. Only use rax to rdx for some byte
	operations to work on compatibility mode (that is, to generate
	the proper encoding, instead of actually generating encoding
	for high byte registers, e.g. %bh).
	Add proper prolog and epilog for windows x64.

        * lib/jit_x86-sse.c: Correct a swapped rex prefix for float
	operations.

        * lib/jit_x86.c: Adjust to support Windows x64 abi.

	* check/check.x87.nodata.sh: New file, previously used but that
	was missing git.

2014-09-07 Paulo Andrade <pcpa@gnu.org>

	* lib/lightning.c: Mark all registers advertised as live, as
	per jit_callee_save_p as live whenever reaching a jump that
	cannot be tracked. This is a rethink of the previous commit,
	and is a better approach, otherwise there would not be much
	sense on relying on jit_callee_save_p if it could not be
	trusted.

	* check/jmpr.tst, check/jmpr.ok: New files implementing a very
	simple test case, that would actually cause an assertion on
	code before the change to only mark as live when reaching a
	jump that could not tracked, the actually advertised as callee
	save registers.

	check/Makefile.am: Update for new jmpr test case.

2014-09-01 Paulo Andrade <pcpa@gnu.org>

	* lib/lightning.c: Do not mark all registers in unknown state
	as live on jit_jmpr, or jit_jmpi to an absolute address. Instead,
	treat it as a function call, and only consider JIT_Vn registers
	as possibly live.

2014-08-29 Paulo Andrade <pcpa@gnu.org>

	* doc/body.texi: Add a proper info menu entry for
	GNU lightning.

	* doc/version.texi: Regenerate.

2014-08-16 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_aarch64-cpu.c, lib/jit_aarch64-fpu.c,
	lib/jit_arm-cpu.c, lib/jit_arm-vfp.c,
	lib/jit_hppa-cpu.c, lib/jit_hppa-fpu.c,
	lib/jit_ia64-cpu.c, lib/jit_ia64-fpu.c,
	lib/jit_mips-cpu.c, lib/jit_mips-fpu.c,
	lib/jit_ppc-cpu.c, lib/jit_ppc-fpu.c,
	lib/jit_s390x-cpu.c, lib/jit_s390x-fpu.c,
	lib/jit_s390x.c, lib/jit_sparc-cpu.c,
	lib/jit_x86-cpu.c, lib/jit_x86-sse.c,
	lib/jit_x86-x87.c: Review generation of all branch
	instructions and always adds the jit_class_nospill
	bitfield for temporary registers that cannot be	spilled
	because the reload would be after a conditional jump; the
	patch only adds an extra assertion. These conditions do
	not happen on documented lightning usage, but can happen
	if one uses the not exported jit_get_reg and jit_unget_reg
	calls and cause enough register starvation.

2014-08-16 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_alpha.c: Correct wrong bitmask of most argument
	float register arguments, that were being set as callee
	save instead of argument registers class.

2014-08-16 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_arm-sz.c: Regenerate table of known maximum
	instruction sizes for the software float fallback,
	that implements "virtual" float registers in the stack
	and operations as calls to libgcc.

	* size.c: Correct typo in the generated jit_arm-sz.c file.

2014-08-10 Paulo Andrade <pcpa@gnu.org>

        * include/lightning/jit_alpha.h, lib/jit_alpha-cpu.c,
        lib/jit_alpha-fpu.c, lib/jit_alpha-sz.c, lib/jit_alpha.c:
	New files implementing a lightning Alpha port. Thanks
	to Trent Nelson and snakebit.net staff for providing access
	to an Alpha system.

        * check/float.tst, check/lightning.c, configure.ac,
        include/lightning.h, include/lightning/Makefile.am,
        include/lightning/jit_private.h, lib/Makefile.am,
        lib/jit_disasm.c, lib/jit_size.c, lib/lightning.c:
	Minor changes to adapt for the new Alpha port.

2014-08-10 Paulo Andrade <pcpa@gnu.org>

	* lib/lightning.c: Always mark JIT_RET and JIT_FRET as
	live in a function epilog. This is required because
	on some ports a complex sequence, allocating one or more
	registers, may be required to jump from a ret* to the
	epilog, and the lightning api does not have annotations
	to know if a function returns a value, or the type of
	the return value.

2014-08-10 Paulo Andrade <pcpa@gnu.org>

	* lib/lightning.c: Change the correct live bitmask of
	return registers after a function call in jit_update.

2014-08-10 Paulo Andrade <pcpa@gnu.org>

	* lib/lightning.c: Change assertions to have an int
	result and correct a bad bit mask assertion.

2014-08-10 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_aarch64.c: Correct bad setup for assertion
	of consistency before a patch.

2014-08-10 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_mips-cpu.c: Correct typo in the jit_bmsr
	implementation that was using the wrong test result
	register.

2014-07-28 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_memory.c: Do not call free on NULL pointers.

	* include/lightning/jit_private.h, lib/jit_note.c,
	lib/lightning.c: Add a wrapper to memcpy and memmove
	to not actually call those functions with a zero size
	argument, and likely also a null src or dst.

2014-07-27 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_private.h, lib/jit_disasm.c,
	lib/lightning.c: Remove the global jit_progname variable.
	It was being only used in jit_init_debug, that is called
	from init_jit, so, just pass an argument.

2014-07-27 Paulo Andrade <pcpa@gnu.org>

	* doc/body.texi: Add note that jit_set_memory_functions
	should be called before init_jit, because init_jit
	itself may call the memory wrappers.

2014-04-22 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_arm.c: Do not get confused with default settings
	if /proc is not mounted on Linux specific code path.

2014-04-09 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_aarch64.h, include/lightning/jit_arm.h,
	include/lightning/jit_hppa.h, include/lightning/jit_ia64.h,
	include/lightning/jit_mips.h, include/lightning/jit_ppc.h,
	include/lightning/jit_private.h, include/lightning/jit_s390x.h,
	include/lightning/jit_sparc.h, include/lightning/jit_x86.h:
	Do not add jit_regset_t, JIT_RA0, and JIT_FA0 to the installed
	header file. These types and definitions are supposed to be
	only used internally.

2014-04-05 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_arm-cpu.c: Only adjust stack pointer in prolog if
	need stack space, that is, do not emit a nop instruction
	subtracting zero from the stack pointer.

2014-04-04 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_disasm.c: Correct a crash in the doc/printf example
	on arm due to releasing the data_info information in
	jit_clear_state. This is a special case for arm only, and
	actually, only armv5 or older uses the data_info buffer,
	or when forcing arm instruction set mode besides thumb
	available.

2014-12-03 Paulo Andrade <pcpa@gnu.org>

	* doc/body.texi: Write detailed description and examples for
	jit_get_memory_functions, jit_set_memory_functions,
	jit_get_code, jit_set_code, jit_get_data and jit_set_data.

2014-12-03 Paulo Andrade <pcpa@gnu.org>

	* include/lightning.h, include/lightning/jit_private.h,
	lib/lightning.c: Implement the new jit_set_data() interface,
	and the new jit_get_data() helper. Like jit_set_code(),
	jit_realize() should be called before jit_set_data().
	The most common usage should be jit_set_data(JIT_DISABLE_DATA
	| JIT_DISABLE_NOTE), to force synthesize any float/double
	constant in the stack and not generate any debug information.

	* lib/jit_note.c: Minor change to debug note generation as
	now it uses an alternate temporary data buffer during constants
	and debug generation to accommodate the possibility of the user
	setting an alternate data buffer.

	* lib/jit_hppa-fpu.c, lib/jit_s390x.c, lib/jit_s390x-cpu.c,
	lib/jit_s390x-fpu.c, lib/jit_sparc.c, lib/jit_sparc-fpu.c,
	lib/jit_x86-sse.c, lib/jit_x86-x87.c: Implement jit_set_data.

	* lib/jit_hppa-sz.c, lib/jit_sparc-sz.c, lib/jit_x86-sz.c,
	lib/jit_s390x-sz.c: Update for several instructions that now
	have a different maximum length due to jit_set_data.

	* lib/jit_mips-fpu.c: Implement jit_set_data, but missing
	validation on n32 and n64 abis (and/or big endian).

	* lib/jit_mips-sz.c: Update for changes in o32.

	* lib/jit_ppc-fpu.c: Implement jit_set_data, but missing
	validation on Darwin PPC.

	* lib/jit_ppc-sz.c: Update for changes in powerpc 32 and
	64 bit.

	* lib/jit_ia64-fpu.c: Implement untested jit_set_data.

	* TODO: Add note to list ports that were not tested for the
	new jit_set_data() feature, due to no longer having access
	to them.

	* check/nodata.c: New file implementing a simple test exercising
	several different conditions created by jit_set_data().

	* check/check.nodata.sh: New file implementing a wrapper
	over the existing *.tst files, that runs all tests without
	using a data buffer for constants; only meaningful (and
	enabled) on architectures that used to store float/double
	constants on a read only data buffer.

	* configure.ac, check/Makefile.am: Update for the new test
	cases.

	* check/lightning.c: Implement the new "-d" option that
	sets an internal flag to call jit_set_data() disable
	constants and debug, that is, using only a pure code
	buffer.

2014-11-03 Paulo Andrade <pcpa@gnu.org>

	* include/lightning.h, include/lightning/jit_private.h,
	lib/lightning.c: Implement the new jit_set_code() interface,
	that allows instructing lightning to use an alternate code
	buffer. The new jit_realize() function should be called
	before jit_set_code(), and usually call jit_get_code()
	to query the amount of bytes expected to be required for
	the code.

	* lib/jit_size.c: Minor update to have less chances of
	miscalculating the code buffer by starting the counter
	with the size of the longest instruction instead of zero,
	as code emit fails if at any moment less than the longest
	instruction bytes are available.

	* check/setcode.c: New file implementing some basic tests
	of the new jit_set_code() interface.

	* check/Makefile.am: Update for newer test case.

2014-06-03 Paulo Andrade <pcpa@gnu.org>

	* include/lightning.h, lib/lightning.c: Add the new
	jit_indirect() call, that returns a special label node,
	and tells lightning that the label may be the target of
	an indirect jump.

	* doc/body.texi: Document the new jit_indirect() call, and
	add examples of different ways to create labels and branches.

2014-23-02 Paulo Andrade <pcpa@gnu.org>

	*  lib/jit_x86.c: Rewrite previous patch to inline save/restore
	because clobbering %ebx in x86 is treated as an error
	(jit_x86.c:239:5: error: PIC register clobbered by 'ebx' in 'asm').

2014-19-02 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_x86.c: Rewrite incorrect inline assembly that could
	truncate a variable in a callee save register. Now it simply
	tells gcc that the register is clobbered, instead of using a
	*32 bit* swap with a temporary variable. The problem only
	happens when compiling with optimization.

2014-19-02 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_aarch64.h, include/lightning/jit_arm.h,
	include/lightning/jit_hppa.h, include/lightning/jit_ia64.h,
	include/lightning/jit_mips.h, include/lightning/jit_ppc.h,
	include/lightning/jit_s390x.h, include/lightning/jit_sparc.h,
	include/lightning/jit_x86.h: Change jit_regset_t to an
	unsigned type, to allow safe right shift.

	* lib/lightning.c: Rewrite jit_regset_scan1 to allow easier
	compiler optimization.

2013-12-03 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_x86-x87.c: Correct wrong optimization when
	loading the log(2) constant.

2013-12-03 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_x86-cpu.c: Use the emms instruction before
	calling any function. This is particularly important
	when using c99 complex functions as it can easily
	overflow the x87 stack due to the way lightning uses
	the x87 stack as a flat register file.

2013-12-02 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_x86-x87.c: Correct wrong code generation due
	to comparing the base and not the value register with
	%st(0) in stxi_f.

2013-12-02 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_x86-x87.c, lib/jit_x86.c: Use 8 bytes aligned
	stack offset for float/double x87 to/from sse move.

2013-11-27 Paulo Andrade <pcpa@gnu.org>

	* configure.ac, lib/jit_arm-swf.c, lib/jit_arm.c: Add
	changes that should at least allow building lightning
	on Apple iOS7.

2013-10-08 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_ppc-cpu.c: Correct wrong shortcut for ldxi_l with
	a zero offset, that was calling ldr_i instead of ldr_l.

2013-10-08 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_arm.h, lib/jit_arm-cpu.c: Do not use
	by default load/store instructions that map to ldrt/strt.
	There is already the long displacement version for positive
	offsets, and when using a (shorter) negative offset it does
	not map to ldrt/strt. At least on qemu strt may cause
	reproducible, but unexpected SIGILL.

2013-10-08 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_arm-vfp.c: Correct wrong load/store offset
	calculation when the displacement is constant but too
	large to use an instruction with an immediate offset.

2013-10-07 Paulo Andrade <pcpa@gnu.org>

	* check/self.c: Extend tests to validate jit_callee_save_p
	does not cause an assertion on valid arguments, and test
	extra registers defined on some backends.

	* configure.ac: Do not ignore environment CFLAGS when
	checking if need to test runtime configurable options,
	like use x87 when sse2 is available, arm instruction set
	instead of thumb, etc.

	* include/lightning/jit_arm.h: Correct wrong jit_f macro
	definition.

	* include/lightning/jit_ia64.h, include/lightning/jit_ppc.h: 
	Correct wrong jit_r macro definition.

	* lib/jit_x86-x87.c, lib/jit_x86.c: Actually use the
	reserved stack space for integer to/from float conversion.
	The stack space was also changed to ensure it is 8 bytes
	aligned. Also, for Solaris x86 in 32 bit mode, an alternate
	truncr_d was implemented because for some reason it is
	failing with SIGILL if using the "fisttpl" instructions,
	that must be available on p6 or newer, but for the sake of
	making all tests pass, implement a 486 or newer sequence
	if "sun" is defined.

2013-10-03 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_mips.h, lib/jit_mips-cpu.c,
	lib/jit_mips-sz.c, lib/jit_mips.c, size: Build and
	pass all test cases on Irix big endian mips using
	the 64 bit abi.

2013-10-02 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_mips.h: Add proper mips abi detection.

2013-09-30 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_print.c: Do not crash if calling jit_print from
	gdb before actually emitting code.

	* lib/lightning.c: Correct misplaced check for already
	visited blocks on conditional branches, what was preventing
	proper merge live bit masks of forward blocks.

2013-09-30 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_x86-cpu.c: Correct not properly tested case of using
	%r12 as index register, what was causing an invalid assertion.
	%r12 is mapped to the "extra" JIT_R3 register, and test cases
	only test "standard" lightning registers.

2013-09-28 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_ia64.c: Minor change to force collecting the maximum
	instruction length in the --enable-devel-get-jit-size build
	mode. The actual generated file did not change because the
	sampling was large enough that it had already collected proper
	information in the previously slightly buggy code (not forcing
	a sync of the instructions that could be combined).

2013-09-27 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_arm.c: Correct build when disassembler is
	disabled.

2013-09-25 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_ia64-cpu.c, lib/jit_ia64-fpu.c: Correct some
	off by one range checks (that were only accepting values
	one less than the maximum allowed) and an invalid test
	condition check that was forcing it to always use
	indirect jumps even when reachable with an immediate
	displacement.

2013-09-24 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_aarch64-sz.c, lib/jit_arm-sz.c, lib/jit_hppa-sz.c,
	lib/jit_ia64-sz.c, lib/jit_mips-sz.c, lib/jit_ppc-sz.c,
	lib/jit_s390x-sz.c, lib/jit_size.c, lib/jit_sparc-sz.c,
	lib/jit_x86-sz.c: New files implementing static tables
	with longest known instructions length generated to match
	a lightning instruction. These tables should make it easier
	to make it very unlikely to ever miscalculate, or by too
	much, the size of a code buffer.

	* lib/jit_size.c: New file that aids to either collect
	jit code size information, or use the information depending
	on build options.

	* size.c: New helper file that parses input for, and create
	an initial jit_$arch-sz.c file, that needs some minor edit
	for arches with multiple configurations.

	* configure.ac, Makefile.am: Add the new, devel mode only
	--enable-devel-get-jit-size configure option, that sets
	compile time flags to collect jit code size information,
	that will be used as input for the "noinst size program".

	* lib/jit_aarch64.c, lib/jit_arm.c, lib/jit_disasm.c,
	lib/jit_hppa.c, lib/jit_ia64.c, lib/jit_memory.c,
	lib/jit_mips.c, lib/jit_ppc.c, lib/jit_s390x.c,
	lib/jit_sparc.c, lib/jit_x86.c, lib/lightning.c: Minor
	changes for the --enable-devel-get-jit-size build mode,
	as well as the "production build mode" with jit code
	size information.

2013-09-14 Paulo Andrade <pcpa@gnu.org>

	* include/lightning.h, lib/lightning.c: Add the new
	jit_pointer_p interface, that returns a boolean value
	telling if the pointer argument is inside the jit
	code buffer. This is useful to avoid the need to add
	extra labels and calls to jit_address to figure bounds
	of code buffer, and still keep internal data private.

2013-09-13 Paulo Andrade <pcpa@gnu.org>

	* include/lightning.h, include/lightning/jit_private.h,
	lib/jit_note.c: Change the code argument of jit_get_note
	to a jit_pointer_t and make jit_get_note a public interface.
	It was intended so since start, as a way to map an offset
	in the code to a function name, file name and line number
	mapping.

2013-09-11 Paulo Andrade <pcpa@gnu.org>

	* doc/body.texi: Correct reversed arguments in example of
	usage in a (possibly) multi threaded, multiple jit_state_t
	environments.

	* include/lightning/jit_arm.h, include/lightning/jit_private.h,
	lib/jit_arm-cpu.c, lib/jit_arm.c: Make a previously, non
	documented, global state private to the related jit_state_t
	generating code.

2013-09-10 Paulo Andrade <pcpa@gnu.org>

	* check/self.c, check/self.ok: New files implementing simple
	consistency check assertions. At first validating some macros
	that use values from different sources agree.

	* check/Makefile.am: Update for the new test case.

	* include/lightning.h,  lib/lightning.c: Add the new
	jit_callee_save_p() call, that is intended to be used when
	writing complex code using lightning, so that one does not
	need to verify what backend is being used, or have access to
	private data, to query if a register is callee save or not;
	on several backends the scratch registers are actually callee
	save.

	* include/lightning/jit_aarch64.h, include/lightning/jit_arm.h,
	include/lightning/jit_hppa.h, include/lightning/jit_mips.h,
	include/lightning/jit_ppc.h, include/lightning/jit_sparc.h,
	include/lightning/jit_x86.h: Add an explicit definition for
	JIT_R3-JIT_Rn, JIT_V3-JIT_Vn and JIT_F6-JIT_Fn when applicable.
	This allows one to write code based on "#if defined(JIT_XN)"
	and therefore, not need to check what is the current backend
	or have access to private data structures. This is particularly
	useful when writing virtual machines with several specialized,
	global registers.

	* lib/jit_ia64.c: Properly flag the callee save general
	purpose registers as such, so that jit_callee_save_p() works
	as intended.

2013-09-10 Paulo Andrade <pcpa@gnu.org>

	* check/lightning.c, configure.ac: Conditionally use the
	code written to workaround a bug in the Hercules emulator,
	as isnan and isinf are not available at least on HP-UX ia64.

2013-09-10 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_s390x-cpu.c: Spill/reload correct callee save
	float registers.

2013-09-10 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_hppa-cpu.c: Correct code to call a function stored
	in a register or a patched function address.

2013-09-10 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_ia64-cpu.c: Correct incorrect logic when restoring
	the value of the "r2" callee save register.

2013-08-29 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_arm-cpu.c, lib/jit_arm.c: Correct wrong test and update
	of the thumb offset information, when checking if needing to
	patch a jump from arm to thumb mode. The problem would happen when
	remapping the code buffer, and the new address being lower than
	the previous one.

2013-08-26 Paulo Andrade <pcpa@gnu.org>

	* configure.ac: Extend FreeBSD test to also handle NetBSD.

	* lib/jit_x86-cpu.c: Correct wrongly defined offset type of
	ldxi_ui. Problem detected when building on NetBSD.

	* lib/lightning.c: Adjust code to handle NetBSD mremap,
	where arguments do not match Linux mremap.

2013-08-26 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_ppc.c: Correct C sequence point problem miscalculating
	the actual function address in a function descriptor. Problem
	happens with gcc 4.8.1 at least.

2013-08-11 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_s390x-cpu.c: Correct code checking if immediate
	fits instruction, but using the negated value.

2013-07-28 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_s390x.h, lib/jit_s390x-cpu.c,
	lib/jit_s390x-fpu.c, lib/jit_s390x.c: New files
	implementing the new s390x port.

	* configure.ac, include/lightning.h,
	include/lightning/Makefile.am,
	include/lightning/jit_private.h,
	lib/Makefile.am, lib/jit_disasm.c, lib/lightning.c:
	Minor adaptation for the new s390x backend.

	* check/float.tst: Update for the s390x result of
	truncating +Inf to integer.

	* check/qalu_mul.tst: Add extra test cases to better test
	high word of signed multiplication as the result is
	adjust from unsigned multiplication on s390x.

2013-07-28 Paulo Andrade <pcpa@gnu.org>

	* check/lightning.c: Do not assume casting a double NaN or
	Inf to float will produce the expected float NaN or Inf.
	This is not true at least under s390x.

2013-07-28 Paulo Andrade <pcpa@gnu.org>

	* check/check.arm.sh, check/check.sh, check/check.swf.sh,
	check/check.x87.sh: Properly check test programs output,
	not just rely on the test program self testing the results
	and not crashing.

2013-07-28 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_aarch64.c: Remove unused macros left from cut&paste
	of jit_arm.c.

2013-07-16 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_aarch64.h, lib/jit_aarch64-cpu.c,
	lib/jit_aarch64-fpu.c, lib/jit_aarch64.c: New files
	implementing the new aarch64 port, as a new architecture,
	not as an expansion of the existing armv[4-7] port.

	* check/lightning.c: Add aarch64 support and a small
	change to recognize character constants as immediate
	values.

	* check/float.tst: Add aarch64 preprocessor conditionals
	to select proper expected value when converting [+-]Inf
	and NaN to integer.

	* include/lightning/jit_arm.h, lib/jit_arm.c: Minor changes
	to better match the new aarch64 files.

	* configure.ac, include/lightning.h,
	include/lightning/Makefile.am, include/lightning/jit_private.h,
	lib/Makefile.am, lib/lightning.c: Minor adjustments
	for the aarch64 port.

2013-07-08 Paulo Andrade <pcpa@gnu.org>

	* NEWS, THANKS, configure.ac, doc/version.texi: Update for
	the 1.99a second alpha release.

2013-06-25 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_mips.c: Correct cut&paste error that caused wrong
	stack offset calculation for double arguments in stack in
	the o32 abi.
	Correct typo in the __LITTLE_ENDIAN macro name, that came
	from cut&paste error in the original typo in lib/jit_ppc.c.

	* lib/jit_ia64.c, lib/jit_ppc.c: Correct typo in the
	__LITTLE_ENDIAN macro name.

2013-06-22 Paulo Andrade <pcpa@gnu.org>

	* check/lightning.c, configure.ac, include/lightning.h,
	lib/lightning.c: Add tests and quirks to build/detect
	and/or work on Irix.

	* include/lightning/jit_mips.h, lib/jit_mips-cpu.c,
	lib/jit_mips-fpu.c, lib/jit_mips.c: Adapt code to run
	in big endian mips, using the n32 abi.

2013-06-18 Paulo Andrade <pcpa@gnu.org>

	* include/lightning.h: Minor extra preprocessor testing
	to "detect" byte order on x86 solaris, that now builds
	and pass all test cases.

2013-06-18 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_sparc-cpu.c: Correct compiler warning of value
	used before assignment. The usage is bogus as the api
	requires always patching jumps, but the random value used
	could cause an assertion due to invalid displacement.

	* lib/jit_sparc.c: Always load and store double arguments
	in stack as 2 float loads or stores, for safety, as unaligned
	access is not allowed in Sparc Solaris.

2013-06-14 Paulo Andrade <pcpa@gnu.org>

	* configure.ac: Force -mlp64 to CFLAGS on HP-UX ia64 port.
	It is the only supported mode, and expects gcc as C compiler.

	* include/lightning.h, lib/jit_ia64-cpu.c, lib/jit_ia64.c:
	Correct ia64 port to work on HP-UX that runs it in big endian
	mode.

2013-06-10 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_hppa.c: Sanitize the cache synchronization inline
	assembly code that was doing twice the work and redundantly
	flushing the end address every loop iteration.

2013-06-09 Paulo Andrade <pcpa@gnu.org>

	* configure.ac, check/Makefile.am, doc/Makefile.am: Do not
	explicitly link to -ldl, but instead autodetect the library
	with dlopen, dlsym, etc.

	* check/lightning.c: Add workaround to apparently buggy
	getopt in HP-UX that sets optind to the wrong index, and
	use RTLD_NEXT on HP-UX instead of RTLD_DEFAULT to dlsym
	global symbols.

	* include/lightning.h: Rework definitions of wordsize and
	byte order to detect proper values on HP-UX.

	* lib/lightning.c: Minor correction to use MAP_ANONYMOUS
	instead of MAP_ANON on HP-UX.

	* lib/jit_hppa.c: Float arguments must be passed on integer
	registers on HP-UX, not only for varargs functions.
	  Add code to properly clear instruction cache. This was
	not required on Debian hppa port, but may have been working
	by accident.

	* lib/jit_hppa-cpu.c: Follow pattern of HP-UX binaries and
	use bve,n instead of bv,n to return from functions.

	* lib/jit_hppa-fpu.c: For some reason "fst? frX,rX,(rY)" did
	not work on the tested computer	(HP-UX B.11.23 U 9000/785 HP-UX)
	so the code was changed, at first for __hpux only to add the
	base and offset register and use the instruction with an
	immediate (zero) offset.

2013-06-07 Paulo Andrade <pcpa@gnu.org>

	* check/lightning.c, lib/jit_disasm.c, lib/jit_ppc-cpu.c,
	lib/jit_ppc-fpu.c, lib/jit_ppc.c, include/lightning.h,
	include/lightning/jit_ppc.h, include/lightning/jit_private.h:
	Adapt code to work on 32 bit AIX ppc using gcc. Most changes
	are basically to adapt the elf64 logic to 32 bit, as it does
	not use the same convention of 32 bit Darwin ppc.

	* check/stack.tst: Add a fake memcpy function to the test
	case if running under AIX, as it is not available to dlsym.

	* configure.ac: Check for getopt.h header, not available in
	AIX.

2013-06-01 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_hppa.h, lib/jit_hppa-cpu.c,
	lib/jit_hppa-fpu.c, lib/jit_hppa.c: New files implementing
	the hppa port. Built on Debian Linux PA-RISC 2.0, 32 bit.

	* check/float.tst: Add preprocessor for hppa expected
	values when converting NaN and +-Inf to an integer.

	* check/ldst.inc: Ensure double load/store tests use an
	8 byte aligned address by default.

	* lib/lightning.c: Correct a bug found during tests in
	the new port, where qmul* and qdiv* were not properly
	setting one of the result registers as modified in the
	function, what would be a problem if the only "write"
	usage were the qmul* or qdiv*.

	* check/varargs.tst, check/varargs.ok: Add one extra
	interleaved integer/double test to validate proper code
	generation in the extra case.

	* check/lightning.c, configure.ac, include/lightning.h,
	include/lightning/Makefile.am,
	include/lightning/jit_private.h, lib/Makefile.am,
	lib/jit_disasm.c: Update for the hppa port.

2013-04-27 Paulo Andrade <pcpa@gnu.org>

	* check/varargs.tst: Correct misplaced .align directive
	that was causing the double buffer to not be aligned at
	8 bytes.
	* lib/jit_ia64-cpu.c:
	  Properly implement abi for excess arguments passed on
	stack.
	  Simplify load/store with immediate displacement argument
	with zero value.
	  Simplify some calls to "subi" changing to "addi" with
	a negative argument.
	  Remove some #if 0'ed code, that could be useful in
	special conditions, but the most useful one would be
	to "optimize" "static" jit functions, but for the sake
	of simplicity, jit functions are implemented in a way
	that can be passed back to C code as C function pointers.
	  Add an attribute to prototypes of several unused functions.
	These functions are defined for the sake of implementing all
	Itanium documented instructions, but a significant amount of
	them is not used by lightning.
	* lib/jit_ia64-fpu.c: Simplify load/store with zero immediate
	displacement and add unused attribute for functions not used
	by lightning, but required to provide macros implementing all
	Itanium documented instructions.
	* lib/jit_ia64.c: Update for the properly implemented abi
	for stack arguments.
	* lib/lightning.c: Mark an unused function as such.

2013-04-27 Paulo Andrade <pcpa@gnu.org>

	lib/jit_ia64-cpu.c:
	  Correct immediate range check of integer comparisons when
	inverting arguments.
	  Correct gei_u that was not decrementing immediate when
	inverting arguments.
	  Correct b?add* and b?sub* that were not properly updating
	the result register.

2013-04-27 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_ia64-cpu.c: Correct wrong mapping of 2 instructions
	in "M-, stop, M-, stop" translation, that was ignoring the
	last stop (implemented as a nop I- stop).

	* lib/jit_ia64-fpu.c: Properly implement fnorm.s and fnorm.d,
	as well as the proper integer to float or double conversion.

2013-04-27 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_ia64-cpu.c: Correct bogus implementation of ldr_T
	for signed integers, that was using ld1.s, ld2.s and ld4.s.
	The ".s" stands for speculative load, not sign extend.

	* lib/jit_ia64-fpu.c: Correct bogus implementation of ldxr_T
	for float and double. The third (actually, second) argument
	is indeed added to the base register, but the base register
	is modified. The actual M7 implementation was already correct,
	just the ldxr_f and ldxr_d implementation that was kept in
	a prototype state, misinterpreting what M7 does.

2013-04-27 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_ia64-cpu.c: Correct X2 pattern matching by preventing
	it to attempt to require a stop between the L and the X
	instruction; that is, check the registers and predicates
	before emitting the L instruction, not after.

	* lib/jit_ia64-fpu.c: Slightly simplify and correct
	divr_f and divrd_d implementation.

	* check/lightning.c: Add __ia64__ preprocessor define
	on Itanium. 

	* check/alu.inc, check/clobber.tst, check/float.tst: Define
	several macros conditionally to __ia64__. This is required
	because __ia64__ jit generation can use way too many memory,
	due to not implementing instruction reordering to avoid
	as much as possible "stops", what causes way too many nops
	to be generated, as well as the fact that division and
	remainder requires function calls, and float division
	requires significant code to implement.

2013-04-27 Paulo Andrade <pcpa@gnu.org>

	* include/lightning.h: Add new backend specific movr_w_d,
	movr_d_w and movi_d_w codes as helpers to ia64 varargs
	functions arguments.

	* lib/jit_ia64-cpu.c:
	  Correct wrong encoding of A5 small integers.
	  Correct define of "mux" instruction modifiers.
	  Correct ordering of arguments and predicates of cmp_xy
	implementation with immediate arguments; like most other
	codes with an immediate, the immediate is the second, not
	the third argument.

	* lib/jit_ia64-fpu.c: Actual implementation of the code
	to move to/from gpr to/from fpr, to implement varargs abi.

	* lib/jit_ia64.c: Make fpr argument registers not allocatable
	as temporaries, no need for the extra checks when there are
	plenty registers.

	* lib/jit_print.c, lib/lightning.c: Minor updates for the
	new movr_w_d, movr_d_w and movi_d_w codes.

2013-04-26 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_ia64-cpu.c, lib/jit_ia64-fpu.c: Correct code to
	also insert a stop to break an instruction group if a
	register is written more than once in the same group.
	This may happen if a register is argument and result of
	some lightning call (not a real instruction). The most
	common case should be code in the pattern:
		movl rn=largenum
		...
		mov rn=smallnum
	where "rn" would end up holding "largenum".
	But the problem possibly could happen in other circumstances.

2013-04-26 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_ia64.h, lib/jit_ia64-cpu.c,
	lib/jit_ia64-fpu.c, lib/jit_ia64.c:
	  Relocate JIT_Rn registers to the local registers, as, like
	float registers, div/rem and sqrt are implemented as function
	calls, and may overwrite non saved scratch registers.
	  Change patch_at to receive a jit_code_t instead of a
	jit_node_t, so that it is easier to "inline" patches when
	some instruction requires complex code to implement, e.g.
	uneq and ltgt.
	  Correct arguments to FMA and FMA like instructions that,
	due to a cut&paste error were passing the wrong argument
	to the related F- implementation function.
	  Rewrite ltgt to return the proper result if one (or both)
	of the arguments is unordered.

2013-04-26 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_ia64.h, include/lightning/jit_private.h,
	lib/jit_ia64-cpu.c, lib/jit_ia64-fpu.c, lib/jit_ia64.c,
	lib/lightning.c: Rework code to detect need of a "stop" to
	also handle predicates, as if a predicate is written, it
	cannot be read in the same instruction group.
	  Use a single jit_regset_t variable for all registers when
	checking need for a stop (increment value by 128 for
	float registers).
	  Correct wrong "subi" implementation, as the code executed
	is r0=im-r1, not r0=r1-im.
	  Use standard lightning 6 fpr registers, and rework to
	use callee save float registers, that may be spill/reloaded
	in prolog/epilog. This is required because some jit
	instructions implementations need to call functions; currently
	integer div/mod and float sqrt, what may change the value of
	scratch float registers.
	  Rework point of "sync" of branches that need to return a
	patch'able address, because the need for a "stop" before a
	predicate read causes all branches to be the instruction
	in slot 0, as there is no template to "stop" and branch
	in the same instruction "bundle".

2013-04-25 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_ia64.h, lib/jit_ia64-cpu.c,
	lib/jit_ia64-fpu.c, lib/jit_ia64.c: New files implementing
	the basic infrastructure of an Itanium port. The code
	compiles and can generate jit for basic hello world like
	functions.

	* check/lightning.c, configure.ac, include/lightning.h,
	include/lightning/Makefile.am, include/lightning/jit_private.h,
	lib/Makefile.am, lib/lightning.c: Update for the Itanium
	port.

	* lib/jit_mips-cpu.c, lib/jit_mips.c: Correct typo and
	make the jit_carry register local to the jit_state_t.
	This matches code reviewed in the Itanium port, that
	should use the same base logic to handle carry/borrow.

2013-04-10 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_private.h, lib/jit_arm.c,
	lib/jit_mips-cpu.c, lib/jit_mips.c, lib/jit_ppc-cpu.c,
	lib/jit_ppc.c, lib/jit_print.c, lib/jit_sparc-cpu.c,
	lib/jit_sparc.c, lib/jit_x86-cpu.c, lib/jit_x86.c,
	lib/lightning.c: Change all jit_regset macros to take
	a pointer argument, to avoid structure copies when
	adding a port to an architecture with more than 64
	registers.

2013-04-08 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_arm.c, lib/jit_ppc.c: Do not rely on __clear_cache
	aligning to the next page boundary the end argument. It may
	actually truncate it.

2013-03-29 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_private.h, lib/jit_arm.c, lib/jit_memory.c,
	lib/jit_mips.c, lib/jit_ppc.c, lib/jit_sparc.c, lib/jit_x86.c,
	lib/lightning.c: Do not start over jit generation if can grow
	the code buffer with mremap without moving the base pointer.

2013-03-29 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_memory.c: Implement a simple memory allocation wrapper
	to allow overriding calls to malloc/calloc/realloc/free, as well
	as ensuring all memory containing pointers is zero or points to
	allocated memory.

	* include/lightning.h, include/lightning/jit_private.h: Definitions
	for the memory allocation wrapper.

	* lib/Makefile.am: Update for new jit_memory.c file.

	* lib/jit_arm.c, lib/jit_disasm.c, lib/jit_mips.c, lib/jit_note.c,
	lib/jit_ppc.c, lib/jit_sparc.c, lib/jit_x86.c, lib/lightning.c:
	Use the new memory allocation wrapper code.

2013-03-22 Paulo Andrade <pcpa@gnu.org>

	* configure.ac, include/lightning/jit_private.h, lib/lightning.c:
	Remove dependency on gmp. Only a simple bitmap was required, and
	that was not enough reason to force linking to gmp and possible
	complications caused by it.

2013-03-10 Paulo Andrade <pcpa@gnu.org>

	* include/lightning.h: Add check for __powerpc__ defined
	in Linux, while Darwin defines __ppc__.

	* include/lightning/jit_ppc.h: Adjust register definitions
	for Darwin 32 bit and Linux 64 bit ppc usage and/or ABI.

	* include/lightning/jit_private.h: Add proper check for
	Linux __powerpc__ and an data definition for an workaround
	to properly handle code that starts with a jump to a "main"
	label.

	* lib/jit_disasm.c: Add extra disassembler initialization
	for __powerpc64__.

	* lib/jit_ppc-cpu.c: Add extra macros and functions, and
	correct/adapt previous ones to handle powerpc64.

	* lib/jit_ppc-fpu.c: Adapt for 64 bit wordsize. Basically
	add conversion from/to int32/int64 and proper handling of
	load/store offsets too large for 32 bit.

	* lib/jit_ppc.c: Add calls to 64 bit codes and adaptation
	for the PowerPC 64 bit Linux ABI.

	* lib/jit_arm.c, lib/jit_mips.c, lib/jit_sparc, lib/jit_x86.c,
	lib/lightning.c: Correct off by one error when restarting jit
	of a function due to finding too late that needs to spill/reload
	some register. Problem was found by accident on a very special
	condition during PowerPC 64 code adaptation.

2013-03-08 Paulo Andrade <pcpa@gnu.org>

	* check/lightning.c: Add missing ppc preprocessor definition.

2013-03-06 Paulo Andrade <pcpa@gnu.org>

	* check/float.tst: Comment out the int to negative infinity
	test in mips for the moment because not all Loongson agrees
	on the result.

	* lib/jit_disasm.c: Add a test instead of an assertion
	when loading symbols for disassembly due to a failure with
	a simple binutils build in Debian mipsel64.

2013-03-06 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_private.h, lib/jit_arm-cpu.c,
	lib/jit_arm.c, lib/jit_disasm.c, lib/jit_mips-cpu.c,
	lib/jit_mips.c, lib/jit_note.c, lib/jit_ppc-cpu.c,
	lib/jit_ppc.c, lib/jit_print.c, lib/jit_sparc-cpu.c,
	lib/jit_sparc.c, lib/jit_x86-cpu.c, lib/jit_x86.c,
	lib/lightning.c: Add an extra structure for data storage
	during jit generation, and release it after generating
	jit, to reduce a bit memory usage, and also to make it
	easier to understand what data is available during
	jit runtime.

2013-03-06 Paulo Andrade <pcpa@gnu.org>

	* lib/lightning.c: Make data and code buffer readonly.

2013-02-20 Paulo Andrade <pcpa@gnu.org>

	* doc/body.texi: Fool proof validate the examples of what
	an assembly-language programmer would write and correct the
	wrong sparc example.

2013-02-19 Paulo Andrade <pcpa@gnu.org>

	* doc/body.texi: Add back the SPARC code generation example.

2013-02-19 Paulo Andrade <pcpa@gnu.org>

	* check/lightning.c: Remove state flag to work with partial
	sparc port, by just disassembling if there was incomplete
	code generation.

	* jit_sparc-cpu.c: Correct wrong range check for immediate
	integer constants (off by one bit shift).
	  Correct macro implementing equivalent "rd %y, rd" assembly.
	  Implement qmul* and qdiv*.

	* jit_sparc.c: Update for qmul* and qdiv* and remove logic
	to handle incomplete code generation during sparc port.

2013-02-18 Paulo Andrade <pcpa@gnu.org>

	* check/float.tst: Add sparc to list of known NaN and +-Inf
	to integer conversion.

	* check/lightning.c: Define __sparc__ to preprocessor in
	the sparc backend.

	* include/lightning/jit_private.h: Correct wrong definition
	of emit_stxi_d, that has lived for a long time, but would
	cause problems whenever needing to spill/reload a float
	register.

	* include/lightning/jit_sparc.h: Can only use %g2,%g3,%g4
	for scratch variables, as other "global" registers are
	reserved for the system, e.g. libc.
	  Reorder float register naming to make it easier to
	access odd float registers, so that generating code for
	pusharg and getarg is easier for the IR.

	* lib/jit_mips-cpu.c, lib/jit_ppc-cpu.c: Update to match
	new code in jit_sparc-cpu.c. It must call jit_get_reg
	with jit_class_nospill if using the register to move
	an unconditional branch address to it, as the reload
	will not happen (actually could happen in the delay
	slot...)

	* lib/jit_sparc-cpu.c: Correct wrong macro definition for
	ldxr_s.
	  Properly implement div* and implement rem. Div* needs
	to use the y register, and rem* needs to be synthesized.
	  Correct b?sub* macro definitions.

	* lib/jit_sparc-fpu.c: Correct reversed float to/from double
	conversion.
	  Correct wrong jit_get_reg call asking for a gpr and then
	using the fpr with that number.
	  Correct wrong branch displacement computation for
	conditional branches.

	* lib/jit_sparc.c: Correct getarg_d and pushargi_d implementation.
	  Add rem* entries to the switch converting IR to machine code.

	* lib/lightning.c: Correct a problem detected when adding
	the jit_class_nospill flag to jit_get_reg, that was caused
	when having a branch to an "epilog" node, what would cause
	the code to think all registers in unknown state were live,
	while in truth, all registers in unknown state in the
	"just after return" point are actually dead.

2013-02-17 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_sparc.h, lib/jit_sparc-cpu.c,
	lib/jit_sparc-fpu.c, lib/jit_sparc.c: New files implementing
	the basic framework of the sparc port.

	* configure.ac, include/lightning.h, include/lightning/Makefile.am,
	include/lightning/jit_private.h, lib/jit_disasm.c: Update
	for the sparc port framework.

	* lib/jit_mips.c: Correct reversed retr/reti logic.

	* lib/jit_ppc.c: Correct misspelled __LITTLE_ENDIAN.

	* lib/lightning.c: Always do byte hashing in hash_data, because
	the logic to "compress" strings causes large pointers to not
	be guaranteed aligned at 4 byte boundaries.
	  Update for the sparc port framework.

2013-02-11 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_arm.c: Correct jit_pushargi_f in the arm hardfp abi.
	Most of the logic uses even numbered register numbers, so that
	a float and a double can be used in the same register, but
	the abi requires packing the float arguments, so jit_pushargi_f
	needs to allocate a temporary register to modify only the
	proper register argument (or be very smart to push two
	immediate arguments if applicable).

2013-02-11 Paulo Andrade <pcpa@gnu.org>

	* include/lightning.h, lib/lightning.c: Implement the new
	jit_clear_state and jit_destroy_state calls. jit_clear_state
	releases all memory not required during jit_execution; that
	is, leaves only the mmap'ed data and code buffers allocated.
	jit_destroy_state releases the mmap'ed buffers as well as
	the jit_state_t object itself, that holds pointers to the
	code and data buffers, as well as annotation pointers (for
	disassembly or backtrace) in the data buffer.

	* lib/jit_note.c: Correct invalid vector offset access.

	* check/ccall.c, check/lightning.c, doc/ifib.c, doc/incr.c,
	doc/printf.c, doc/rfib.c, doc/rpn.c: Use the new jit_clear_state
	and jit_destroy_state calls, to demonstrate the new code to
	release all jit memory.

	* doc/body.texi: Add basic documentation and usage description
	of jit_clear_state and jit_destroy_state.

2013-02-11 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_private.h, lib/jit_note.c, lib/lightning.c:
	  Store all annotation information in the mmap'ed area reserved for
	read only data. This adds code to not allocate memory for jit_note_t
	objects, and to	relocate jit_line_t objects and its contents after
	calculating annotation information. The jit_line_t objects are
	relocated because it is not possible to always calculate before
	hand data layout because note information may be extended or
	redundant entries removed, as well as allowed to be added in
	non sequential order.
	  A bug was also corrected in _jit_set_note, that was causing it
	to allocate new jit_line_t objects when not needed. It was still
	working correctly, but allocating way more memory than required.

2013-02-05 Paulo Andrade <pcpa@gnu.org>

	*include/lightning.h, lib/lightning.c: Add the new jit_live code
	to explicitly mark a register as live. It is required to avoid
	assuming functions always return a value in the gpr and fpr return
	register, and to avoid the need of some very specialized codes
	that vary too much from backend to backend, to instruct the
	optimization code the return register is live.

	* lib/jit_arm.c, lib/jit_mips.c, lib/jit_ppc.c, lib/jit_print.c,
	lib/jit_x86.c: Update for the new jit_live code.

	* check/ret.ok, check/ret.tst: New files implementing a simple
	test case that would previously fail at least in ix86/x86_64.

	* check/Makefile.am: Update for new "ret" test case.

2013-02-05 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_ppc-cpu.c, lib/jit_ppc.c: Validate and correct
	problems in the qmul and qdiv ppc implementation.

2013-02-04 Paulo Andrade <pcpa@gnu.org>

	* include/lightning.h, include/lightning/jit_private.h,
	lib/jit_arm-cpu.c, lib/jit_arm.c, lib/jit_mips-cpu.c,
	lib/jit_mips.c, lib/jit_ppc-cpu.c, lib/jit_ppc.c,
	lib/jit_x86-cpu.c, lib/jit_x86.c, lib/lightning.c:
	Implement the new qmul and qdiv instructions that return signed
	and unsigned lo/hi multiplication result and div/rem division result.
	These should be useful for jit translation of code that needs to
	know if a multiplication overflows (no branch opcode added) or if
	a division is exact (easy check if remainder is zero).

	* check/lightning.c, lib/jit_print.c, check/Makefile.am,
	check/all.tst: Update for the new qmul and qdiv instructions.

	* check/qalu.inc, check/qalu_div.ok, check/qalu_div.tst,
	check/qalu_mul.ok, check/qalu_mul.tst: New files implementing
	simple test cases for qmul and qdiv.

2013-01-30 Paulo Andrade <pcpa@gnu.org>

	* doc/body.texi: Correct "jmpi" description that incorrectly
	told it was possible to pass any address as jump target. The
	only way to do that is "movi+jmpr".

2013-01-30 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_x86-cpu.c: Correct undefined behavior code.
	http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56143

2013-01-29 Paulo Andrade <pcpa@gnu.org>

	* configure.ac: Use AC_CONFIG_HEADERS instead of AC_CONFIG_HEADER
	to have HAVE_CONFIG_H defined with latest aclocal.

	* include/lightning/jit_private.h, lib/lightning.c: Add new
	abstraction to use an heuristic to calculate amount of space
	required for jit generation, and code to reallocate buffer if
	did miscalculate it.

	* lib/jit_arm.c, lib/jit_mips.c, lib/jit_ppc.c, lib/jit_x86.c:
	Update to use new code to estimate and resize of required buffer
	for jit code.

	* lib/jit_x86-cpu.c: Minor cosmetic change to avoid adding a
	non required rex prefix when calling a function pointer stored
	in a register.

2013-01-24 Paulo Andrade <pcpa@gnu.org>

	* check/Makefile.am: "make debug" target should pass only
	the main test tool program as argument for running gdb

	* configure.ac: Add the --enable-assertions options.

	* doc/Makefile.am, doc/body.texi, doc/lightning.texi:
	Major rewrite of the documentation to match the current
	implementation.

	* doc/version.texi: Automatic date update.

	* doc/ifib.c, doc/incr.c, doc/printf.c, doc/rfib.c, doc/rpn.c:
	Implementation of the documentation examples, that are also
	compiled during a normal build.

	* doc/p-lightning.texi, doc/porting.texi, doc/toc.texi,
	doc/u-lightning.texi, doc/using.texi: These files were
	renamed in the documentation rewrite, as the documentation
	was significantly trimmed due to full removal of the porting
	chapters. Better porting documentation should be added but
	for the moment it was just removed the documentation not
	matching the implementation.

2013-01-18 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_note.c: Correct bounds check and wrong code keeping
	a pointer that could be changed after a realloc call.

2013-01-18 Paulo Andrade <pcpa@gnu.org>

	* check/3to2.tst, check/add.tst, check/allocai.tst, check/bp.tst,
	check/call.tst, check/ccall.c, check/clobber.tst, check/divi.tst,
	check/fib.tst, check/ldsti.tst, check/ldstr-c.tst, check/ldstr.tst,
	check/ldstxi-c.tst, check/ldstxi.tst, check/ldstxr-c.tst,
	check/ldstxr.tst, check/lightning.c, check/rpn.tst, check/stack.tst,
	check/varargs.tst, include/lightning.h,
	include/lightning/jit_private.h, lib/jit_arm.c, lib/jit_disasm.c,
	lib/jit_mips.c, lib/jit_note.c, lib/jit_ppc.c, lib/jit_print.c,
	lib/jit_x86.c, lib/lightning.c:	Extend the "jit_note" abstraction
	with the new "jit_name" call, that receives a string argument, and
	should usually be called to mark boundaries of functions of code
	generating jit (that is, it is not expected that the language
	generating jit map its functions to jit functions).

2013-01-17 Paulo Andrade <pcpa@gnu.org>

	* check/add.tst, check/allocai.tst, check/bp.tst, check/divi.tst,
	check/fib.tst, check/lightning.c, include/lightning/jit_arm.h,
	include/lightning/jit_mips.h, include/lightning/jit_ppc.h,
	include/lightning/jit_private.h, include/lightning/jit_x86.h:
	Make JIT_RET, JIT_FRET and JIT_SP private. These should not be
	used in any operations due to frequently having special
	constraints (usually JIT_FRET). JIT_FP must be made available
	because it must be used as the base register to access stack
	space allocated with jit_allocai.

2013-01-14 Paulo Andrade <pcpa@gnu.org>

	* include/lightning.h, lib/lightning.c: Add an extra align
	argument to the jit_data call (that should be made private),
	so that it should not align strings at 8 bytes.
	  Correct the jit_note call to include the null ending byte
	when adding label/note names to the "jit data section".

2013-01-11 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_note.c: New file implementing a simple string+integer
	annotation, that should be used to map filename and line number
	to offsets in the generated jit.

	* include/lightning.h, lib/lightning.c: Update for the new
	note code.
	  Add an extra mandatory argument to init_jit, that is used
	as argument to bfd_openr.
	  Change from generic void* to char* the argument to jit_note
	and add an extra integer argument, to map to filename and
	line number.

	* check/ccall.c, check/lightning.c, include/lightning/jit_private.h,
	lib/jit_arm.c, lib/jit_disasm.c, lib/jit_mips.c, lib/jit_ppc.c,
	lib/jit_print.c, lib/jit_x86.c: lib/Makefile.am: Update for the
	new annotation code.

	* configure.ac, check/Makefile.am: Update to work with latest
	automake.

2013-01-09 Paulo Andrade <pcpa@gnu.org>

	* include/lightning.h, lib/jit_arm.c, jit_mips-fpu.c,
	lib/jit_mips.c, lib/jit_print.c, lib/jit_x86.c, lib/lightning.c:
	Remove the jit_code_getarg_{f,d} and jit_code_pusharg{i,r}_{f,d}
	calls, replacing them with the new, internal only, jit_movr_w_f,
	jit_mov{r,i}_f_w, jit_movr_ww_d, and jit_mov{i,r}_d_ww, that
	better describe the operation being done, and allow removing
	the hackish code to detect special conditions for arm when
	moving from/to vfp from/to a grp register pair.
	Rename jit_code_retval_{f,d} to jit_code_x86_retval_{f,d} as
	it is specific to 32 bit x86, and used to move abi return
	value in x87 register to a sse register.

2013-01-05 Paulo Andrade <pcpa@gnu.org>

	* check/cccall.c, check/ccall.ok: New test case to validate
	interleaved calls from/to C code and jit.

	* check/Makefile.am: Update for the new ccall test case.

	* include/lightning.h, lib/lightning.c: Add the new jit_address
	call that returns the real/final address of a "note" in the
	generated jit. It requires a jit_node_t as returned by the
	jit_note call, and is only valid after calling jit_emit.
	  Add an intermediate solution to properly handle arm
	soft and softfp modes that move a double to an integer register
	pair. Currently it just adds extra tests for the condition,
	but the proper solution should be to have extra lightning
	codes for these conditions, codes which should be only used
	by the backends that need it, and merged with the existing
	jit_pusharg*_{f,d}.

	* include/lightning/jit_private.h: Add new jit_state_t flag
	to know it finished jit_emit, so that calls to jit_address
	are valid.

	* lib/jit_mips.c: Correct abi implementation so that the
	new ccall test case pass. Major problem was using
	_jit->function.self.arg{i,f} as boolean values, but that
	would cause lightning.c:patch_registers() to incorrectly
	assume only one register was used as argument when calling
	jit_regarg_p(); _jit->function.self.arg{i,f} must be the
	number of registers used as arguments (in all backends).

	* lib/jit_x86.c: Add workaround, by marking %rax as used,
	to a special condition, when running out of registers and the
	allocator trying to spill and reload %rax, but %rax was used
	as a pointer to a function, what would cause the reload to
	destroy the return value. This condition can be better
	generalized, but the current solution is good enough.

	* include/lightning/jit_ppc.h, lib/jit_ppc-cpu.c, lib/jit_ppc.c:
	Rewrite logic to handle arguments, as the original code was
	written based on a SysV pdf about the generic powerpc ABI,
	what did "invent" a new abi for the previous test cases, but
	failed in the new ccall test in Darwin PPC. Now it properly
	handles 13 float registers for arguments, as well as proper
	computation of stack offsets when running out of registers
	for arguments.

2013-01-02 Paulo Andrade <pcpa@gnu.org>

	* check/float.tst: Correct test case to match ppc also
	converting positive infinity to 0x7fffffff.

	* lib/jit_arm-swf.c: Correct typos with double underscores.

	* lib/lightning.c: Correct remaining wrong reverse jump logic.

2012-12-29 Paulo Andrade <pcpa@gnu.org>

	* lib/lightning.c: Correct both, wrong and confusing logic
	to compute the reverse of a jump. Now it properly matches
	C semantics for "eq" (==) and "ne" (!=) and correct computation
	of reverse of "uneq" as "gt".

	* check/branch.tst: Update "ne" float branch check that
	previously happened to be wrongly tested with a NaN argument.

2012-12-29 Paulo Andrade <pcpa@gnu.org>

	* check/float.ok, check/float.tst: New test cases implementing
	extensive validation of float comparison and branch code
	generation as well as integer conversion, involving NaN and
	[+-]Inf.

	* lib/jit_arm-swf.c, lib/jit_x86-sse.c, lib/jit_x86-x87.c:
	Correct bugs found by new float test case.

	* lib/jit_x86.c: Correct cut&paste error added in commit to
	convert jit_arg* return value to a jit_node_t*,	that would
	cause it to not properly handle double arguments in ix86.

	* check/Makefile.am: Update for the new test case.

2012-12-28 Paulo Andrade <pcpa@gnu.org>

	* check/lightning.c, include/lightning.h, lib/jit_arm.c,
	lib/jit_mips.c, lib/jit_ppc.c, lib/jit_print.c,	lib/jit_x86.c,
	lib/lightning.c: Change return value of jit_arg{,_f,_d} to
	a jit_node_t* object, that should be used as argument to
	jit_getarg_{c,uc,s,us,i,ui,l,f,d}. This just requires changing
	from jit_int32_t to jit_pointer_t (or jit_node_t*) the "handle"
	for the getarg calls, with the benefit that it makes it easy
	to implement patching of the stack address of non register
	arguments, this way allowing to implement variable size stack
	frames if applicable; useful if there are too many registers and
	jit functions uses only a few callee save registers.

2012-12-27 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_arm.c, lib/jit_mips-cpu.c, lib/jit_mips.c: Correct
	regressions when patching jit_calli for a forward function.

	* lib/jit_ppc-cpu.c: Correct wrong arguments to ANDI opcode
	in jit_getarg_u{c,s} implementation.

2012-12-23 Paulo Andrade <pcpa@gnu.org>

	* check/call.ok, check/call.tst: New test cases to validate
	simple typed argument and return values in function calls.

	* check/lightning.c: Properly handle jit_movi of labels for
	backward and forward code labels.

	* check/Makefile.am: Update for new test case.

2012-12-23 Paulo Andrade <pcpa@gnu.org>

	* check/carry.ok, check/carry.tst: New test case to validate
	carry condition handling.

	* check/Makefile.am: Update for new test case.

2012-12-22 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_ppc-cpu.c, lib/jit_ppc.c: Implement logic for
	jit_htonr for big endian, so that ppc (big endian) pass the
	new clobber.tst test case.

2012-12-22 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_arm.c: Correct use of wrong argument offset
	variable in armv7l or float/double argument for varargs
	function in armv7hl.
	  Correct jit_getarg* logic in software float mode to
	match expected behavior in other backends, that is, if
	a function is not called, it is safe to use a few lightning
	calls before a next jit_getarg* call, as done in the test
	case check/stack.tst. The proper solution should be to
	extend the parser in lib/lightning.c to check if there is
	some float operation that will call some (libgcc?) function,
	but software float arm should be a very uncommon backend for
	lightning, so, just load the already in place arguments
	saved to stack, assuming the register argument was clobbered
	(what should not be the case most times...).

2012-12-22 Paulo Andrade <pcpa@gnu.org>

	* check/clobber.ok, check/clobber.tst: New test case doing
	extensive validation tests to ensure registers not used in
	a operation are not clobbered.

	* check/Makefile.am: Update for new test case.

2012-12-21 Paulo Andrade <pcpa@gnu.org>

	* lib/lightning.c: Partially rewrite/revert code to compute
	initial	register live state at the start of a basic block.
	The original logic was corrupted when adding optimizations
	to do as few computations as possible in jit_update. The
	reglive field must be always a known set of live registers
	at the start of a basic block. The value that was incorrect
	was the regmask field, that must be the set of registers
	that are in unknown state, because they are not known live,
	neither set (or possibly not set) in the basic block, and
	*must* store the state at the start of the basic block.

2012-12-20 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_ppc.h: Correct mismatch of JIT_F{1,5}
	with enum codes, that were correct, and returned by jit_f().

	* lib/jit_ppc-cpu.c, lib/jit_ppc-fpu.c, lib/jit_ppc.c: Properly
	implement and better describe values when generating stack
	frames.

2012-12-18 Paulo Andrade <pcpa@gnu.org>

	* check/stack.ok, check/stack.tst: New files to test data
	integrity on a deep chain of stack frames.

	* lib/jit_arm.c, lib/jit_arm-cpu.c, lib/jit_mips.c,
	lib/jit_mips-cpu.c, lib/jit_ppc.c, lib/jit_ppc-cpu.c,
	lib/jit_x86.c, lib/jit_x86-cpu.c: Calculate _jit->function->stack
	in the emit stage, otherwise it will calculate it wrong if
	need to jit_allocai space to spill registers.

	* lib/lightning.c: Correct wrong offset when updating the
	"current" jit function pointer in the code that may need to
	allocate stack space to spill registers.

	* check/lightning.c: Correct off by one data space check.

	* check/Makefile.am: Update for new test case.

2012-12-17 Paulo Andrade <pcpa@gnu.org>

	* check/fop_abs.ok, check/fop_abs.tst, check/fop_sqrt.ok,
	check/fop_sqrt.tst: New files implementing simple test cases
	for the extra float operations.

	* check/Makefile.am: Update for new test cases.

	* check/alu.inc: Add an extra macro to check for unordered
	equality on tests where it is expected to use NaN as an
	argument.

	* check/lightning.c: Minor change for proper/common argument
	syntax handling ommiting arguments to options.

2012-12-17 Paulo Andrade <pcpa@gnu.org>

	* check/Makefile.am: Automatically generate pattern list
	of tests with alternate jit generation options. This should
	prevent typos and needing to change multiple places after
	a change.

2012-12-14 Paulo Andrade <pcpa@gnu.org>

	* check/lightning.c: Remove the ".cpu name value" syntax,
	as it was not able to do proper changes before the jit
	internal data structure was initialized. Now it supports
	several getopt options to force using different jit
	generation options, effectively replacing the previous
	syntax.

	* check/run-test: Add simple extra logic to handle differently
	named test scripts, used to test things like x87 coprocessor
	in ix86, and arm instruction set or software float in armv7l.

	* configure.ac: Add some AC_RUN_IFELSE calls to figure at
	compile time if can test different code generation options,
	and update Makefile generation accordingly.

	* check/Makefile.am, lib/jit_arm.c, lib/jit_x86.c: Update to
	properly work with the test tool updating the jit_cpu global
	information.

	* check/check.arm.sh, check/check.swf.sh, check/check.x87.sh:
	New wrapper files passing -mthumb=0, mvfp=0 and -mx87=1 to
	the test tool, if applicable, so that it can validate alternate
	code generation options on test hosts that support them.

2012-12-14 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_x86-x87.c, lib/jit_x86.c: Correct test cases in ix86
	when using the x87 coprocessor instead of sse2+.

2012-12-14 Paulo Andrade <pcpa@gnu.org>

	* include/lightning.h, include/lightning/jit_private.h,
	lib/jit_arm.c, lib/jit_mips.c, lib/jit_ppc.c, lib/jit_x86.c,
	lib/lightning.c: Make jit_ellipsis implementation not
	backend specific. It is not intended to handle va_list
	like objects at runtime, as jit_arg* and jit_getarg*
	return constant values resolved at parse time, so, effectively
	it is not possible to create printf like jit functions, as
	there is no va_start, va_arg, va_end, etc, abstraction. This
	limitation should be kept for the sake of making new ports
	easier.

2012-12-14 Paulo Andrade <pcpa@gnu.org>

	* include/lightning.h, lib/lightning.c: Add two extra wrapper
	functions to avoid need for excess pointer to/from word casts.

	* check/lightning.c: Only need for pointer to/from word cast
	now is jit_movi, update accordingly.

2012-12-13 Paulo Andrade <pcpa@gnu.org>

	* check/varargs.ok, check/varargs.tst: New test cases implementing
	simple varargs calls with a large amount of arguments to exercise
	excess arguments on stack.

	* include/lightning.h: Include config.h if HAVE_CONFIG_H is
	defined.

	* lib/jit_arm.c: Allocate a fpr register, not a gpr one for
	temporary when pushing varargs arguments in the stack.

	* lib/jit_arm-swf.c: Correct code changing the wrong offset
	in jit_absr_d and jit_negr_d in software float.

	* lib/jit_mips.c: Correct calculation of offsets of arguments
	on stack.

	* lib/jit_ppc.c: Correct bogus logic for "next" offset of arguments
	on stack and adjust for fixed offset of stack arguments.

2012-12-12 Paulo Andrade <pcpa@gnu.org>

	* include/lightning.h, lib/jit_arm.c, lib/jit_mips.c,
	lib/jit_ppc.c, lib/jit_x86.c, lib/lightning.c: Change jit_prepare
	to no longer receive an argument. If receiving an argument, it
	should be an ABI specifier, not a boolean if varargs or not,
	and add the new jit_ellipsis call, to specify where the
	ellipsis is in the C prototype of the function being called.
	Note that currently it is not supported to define varargs
	functions and it will be ignored if calling jit_ellipsis not
	in a prepare/finish* block, but this should be addressed.

	* check/allocai.tst, check/alu_add.tst, check/alu_and.tst,
	check/alu_com.tst, check/alu_div.tst, check/alu_lsh.tst,
	check/alu_mul.tst, check/alu_neg.tst, check/alu_or.tst,
	check/alu_rem.tst, check/alu_rsh.tst, check/alu_sub.tst,
	check/alu_xor.tst, check/alux_add.tst, check/alux_sub.tst,
	check/bp.tst, check/branch.tst, check/cvt.tst, check/divi.tst,
	check/fib.tst, check/ldsti.tst, check/ldstr-c.tst,
	check/ldstr.tst, check/ldstxi-c.tst, check/ldstxi.tst,
	check/ldstxr-c.tst, check/ldstxr.tst, check/rpn.tst,
	check/lightning.c: Update for the change to jit_prepare and
	addition of jit_ellipsis.

2012-12-11 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_ppc-cpu.c: Make movr a function that checks arguments
	so that other code can safely assume it is a noop if src and dst
	are the same register.
	  Implement rem{r,i}{,_u} as a div{,u}/mul/sub.
	  Correct ANDIS, ORIS and XORIS calls to cast the argument to
	unsigned before the shift to avoid an assertion if the argument
	had the topmost bit set.
	  Implement lshi, rshi and rshi_u as functions to test for a
	zero argument, that would otherwise trigger an assertion when
	computing the shift value.
	  Do a simple implementation of bm{s,c}{r,i} with a temporary,
	"andr" of arguments and jump based on comparison with zero.
	  Correct typo in ldxi_c.

	* lib/jit_ppc-fpu.c: Correct wrong arguments to FDIV* and STF*.

	* lib/jit_ppc.c: Correct wrong check for 6 instead of 8 integer
	arguments in registers. If calling a varargs function and
	passing a float or double argument, also either store the
	value in the stack or in integer registers, as varargs functions
	do not fetch it from float registers.
	  Add "case" for new functions and incorrectly missing ones.
	  Call libgcc's __clear_cache, that should know what to do
	if the hardware needs flushing cache before execution.

	* lib/lightning.c: Do a simple/trivial logic in jit_regset_scan1,
	that should make it easier for the compiler to optimize it, and
	that also corrects the previously wrong code for big endian, and
	that was causing problems in ppc due to not saving all callee save
	registers as it was not "finding" them in the regset due to the
	little endian assumption bug.

2012-12-11 Paulo Andrade <pcpa@gnu.org>

	* configure.ac: Only default to using the builtin disassembler
	if on GNU/Linux. This should be temporary, due to requiring
	/proc/self/exe.
	  Correctly check $target_cpu for powerpc.

	* include/lightning/jit_ppc.h: Correctly implement jit_v_num.

	* include/lightning/jit_private.h: Declare proper prototype
	for jit_init_debug and jit_finish_debug.

	* lib/jit_ppc-cpu.c: Remove code to save/restore callee save
	float registers, as it is not required since those float
	registers are not usable currently.
	  Change prolog and epilog generation to, at least comparing
	code, match what gcc generates in "gcc -O0", but it is still
	failing in Darwin PPC, apparently due to the __clear_cache
	call not being enough, as frequently it will also fail to
	execute, and the code buffer is all zeroes.

	* lib/lightning.c: Do not fail in jit_regset_scan1 calls due
	to passing 64 as argument on computers with 64 registers.

2012-12-10 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_mips-cpu.c: Correct all current test cases.
	  Call the "xori" not the "XORI" macro for jit_xori implementation,
	as the XORI macro handles only 16 bit unsigned values.
	  Call the "movr" macro, not the "movi" macro in the special
	case of adding or subtracting zero.
	  Use the proper temporary register in the jit_andr implementation.

2012-12-09 Paulo Andrade <pcpa@gnu.org>

	* check/alu.inc, check/alu_add.ok, check/alu_add.tst,
	check/alu_and.ok, check/alu_and.tst, check/alu_com.ok,
	check/alu_com.tst, check/alu_div.ok, check/alu_div.tst,
	check/alu_lsh.ok, check/alu_lsh.tst, check/alu_mul.ok,
	check/alu_mul.tst, check/alu_neg.ok, check/alu_neg.tst,
	check/alu_or.ok, check/alu_or.tst, check/alu_rem.ok,
	check/alu_rem.tst, check/alu_rsh.ok, check/alu_rsh.tst,
	check/alu_sub.ok, check/alu_sub.tst, check/alu_xor.ok,
	check/alu_xor.tst, check/alux_add.ok, check/alux_add.tst,
	check/alux_sub.ok, check/alux_sub.tst, check/branch.ok,
	check/branch.tst: New test cases for arithmetic and branch
	tests.

	* check/Makefile.am: Update for new test cases.

	* include/lightning/jit_private.h: Make the jit_reg_free_p
	macro shared by all backends. Previously was added for the
	arm backend, but is useful in the x86_64 backend when checking
	state of "special purpose register".
	Also add the new jit_class_named register class, that must be
	or'ed with the register value if calling jit_get_reg expecting
	an specific value, because the specific register value may be
	zero, that previously was treated as no register requested.

	* lib/jit_arm-cpu.c: Correct argument order for T2_MVN.

	* lib/jit_arm-swf.c: Call the proper function for double
	divide. The "software float" implementation just calls
	libgcc functions.

	* lib/jit_arm.c: Return float/double values in the float
	register if using the hard float ABI.

	* lib/jit_x86-cpu.c: Change the can_sign_extend_int_p macro
	to not include -0x80000000L, because there is code that
	"abuses" it and thinks it can negate the immediate value
	after calling that macro.
	  Correct implementation of jit_subi that had a wrong code
	patch logic doing subtraction with reversed arguments.
	  Correct REX prefix calculation in the jit_muli implementation.
	  Correct logic to get/unget %*ax and %*dx registers in divremr
	and divremi.
	  Correct divremi that was using the symbolic, unique %*ax
	value in on place (not using the _REGNO name suffix).
	  Correct cut&paste error causing it to use "xor" instead of
	"or" in one code path of the jit_ori implementation.
	  Correct several flaws when clobbering registers and/or when
	one of the arguments was %*cx in the rotshr wrapper function
	implementing most shift operations.

	* lib/lightning.c: No longer expect that the backend be smart
	enough to know what to do when asking for a named register
	if that register is already an argument or is live. It fails
	if it is an argument, or if register is live, fails if cannot
	spill.
	  No longer incorrectly assume that eqr_{f,d} and ltgr_{f,d} are
	safe to inverse value tests in jump thread optimization.

2012-12-05 Paulo Andrade <pcpa@gnu.org>

	* check/Makefile.am, check/cvt.ok, check/cvt.tst: Add new
	"cvt" test case to test conversion from/to int/float types.

	* check/lightning.c: Only define truncr_{f,d}_l in 64 bit mode.

	* include/lightning.h: Correct typo that caused it to define
	jit_truncr_{f,d}_l in 32 bit mode.

	* lib/jit_arm-cpu.c: Avoid assertion failure in the signed/unsigned
	extend opcodes generation as it shares an interface for 3 argument
	opcode generation.

	* lib/jit_x86-cpu.c: Correct wrong argument passed to
	jit_unget_reg in the andi implementation and wrong byte
	unsigned extend code generation.

	* lib/jit_x86-sse.c: Correct conversion from "word" to float or
	double as is dependent on wordsize.

2012-12-05 Paulo Andrade <pcpa@gnu.org>

	* check/ldstr-c.ok, check/ldstr-c.tst, check/ldstxi-c.ok,
	check/ldstxi-c.tst, check/ldstxr-c.ok, check/ldstxr-c.tst:
	New test case files testing load clobbering the base and/or
	index register;

	* check/ldst.inc: New file with common definition for all the
	ldst* test cases.

	check/Makefile.am, check/ldsti.tst, check/ldstr.tst,
	check/ldstxi.tst, check/ldstxr.tst: Update for new common
	definitions file and new register clobber ldst tests.

2012-12-05 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_mips-fpu.c: Correct wrong register order in stxr_{f,d}
	in the mips backend.

2012-12-05 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_arm-vfp.c: Correct regression found in armv7l with
	latest test cases.

2012-12-05 Paulo Andrade <pcpa@gnu.org>

	* check/ldstxi.tst, check/ldstxr.tst: Correct wrong argument
	order for 32 bit mode tests.

	* configure.ac: Correct check for ix86 target_cpu.

2012-12-05 Paulo Andrade <pcpa@gnu.org>

	* check/ldstr.ok, check/ldstr.tst, check/ldsti.ok,
	check/ldsti.tst, check/ldstxr.ok, check/ldstxr.tst,
	check/ldstxi.ok, check/ldstxi.tst:
	New test case files exercising a very large amount of
	register combinations to verify load/store implementation.

	* check/Makefile.am: Update for new test cases.

	* lib/jit_x86-cpu.c: Correct wrong argument order when
	computing REX prefix for {ld,st}r_T codes;

2012-12-04 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_mips-fpu.c, lib/jit_mips.c: Implement missing mips
	jit_sqrtr_{f,d} codes.

	* check/all.tst, include/lightning.h, lib/jit_print.c: Change
	declaration order and call order in all.tst of {add,sub}c and
	{add,sub}x. *c must be called before to set the carry and *x
	second to use the carry and keep it set. The wrong call order
	was causing all.tst to fail in mips, where a register is
	allocated to keep a global carry state.

2012-12-04 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_mips.h, lib/jit_mips-cpu.c,
	lib/jit_mips-fpu.c, lib/jit_mips.c: Correct float/double
	argument handling and make the mips backend pass the initial
	test cases.

	* include/lightning.h, ib/jit_print.c, lib/lightning.c:
	Add extra enum values for argument handling functions that
	could not be abstracted to the current codes, that is, when
	float values need to move from/to gpr from/to fpr. It would
	be more tempting to add such primitives, but they would have
	wordsize limitations, and it is not expected to add codes
	with one gpr argument for 64 bit and two for 32 bit.

	* lib/jit_ppc.c: Check _jit->function before calling jit_epilog()
	to avoid a runtime exception.

2012-12-04 Paulo Andrade <pcpa@gnu.org>

	* include/lightning/jit_mips.h, lib/jit_mips.c: Update to
	make the mips backend compile in a qemu image.

	* lib/jit_ppc.c: Minor adaptations to help in having the
	ppc backend compilable.

2012-12-03 Paulo Andrade <pcpa@gnu.org>

	* configure.ac, include/lightning/jit_private.h, lib/jit_arm-cpu.c,
	lib/jit_arm-swf.c, lib/jit_arm.c, check/Makefile.am: Correct
	implementation of the arm backend port to build and pass the
	current test cases. Tested on armv7 with softfp abi.

	* lib/jit_disasm.c: Rename and change prototype of static
	disassemble function as in the arm backend it is required
	to access state information stored in the jit_state_t object.

	* check/3to2.tst, check/add.tst: Correct test case code assuming
	JIT_RO and JIT_RET are the same, and even if they are the same,
	the logic was incorrect because it must always call jit_retval*
	to fetch a function call return before any other instruction.
	The arm backend hash a special condition if jit_retval is not
	called, because "r0" is not JIT_R0, but is JIT_RET and *also*
	the first argument for a called function, so JIT_RET must be
	only used as an argument to jit_retval.

2012-12-03 Paulo Andrade <pcpa@gnu.org>

	* check/all.tst, check/lightning.c: Only declare or use 64 bit
	interfaces on 64 bit builds.

	* check/fib.tst: Use simpler logic to not need preprocessor
	conditionals for 32 or 64 bit.

	* include/lightning.h: Only declare 64 bit macros on a 64 bit
	build. Code using lightning must know about wordsize and the
	jit generation limitations, also, this way it generates a
	compile time failure, not a runtime assertion.

	* include/lightning/jit_x86.h: Correct typo in macro name.

	* lib/jit_arm.c, lib/jit_arm-cpu.c, lib/jit_mips.c,
	lib/jit_mips-cpu.c, lib/jit_ppc.c, lib/jit_ppc-cpu.c, 
	lib/jit_x86.c, lib/jit_x86-cpu.c: Correct wrong code to get
	current jit function pointer.

	* lib/lightning.c: Move call to the simplify() optimization
	to after register liveness is known. Previous code did work
	by accident but now with proper test cases the problem was
	noticed.

	* lib/jit_disasm.c: Always cast bfd_vma to long long when
	passing it as printf argument.

2012-12-03 Paulo Andrade <pcpa@gnu.org>

	* configure.ac, check/Makefile.am, check/check.sh,
	doc/Makefile.am, include/lightning/Makefile.am,
	lib/Makefile.am: Correct make distcheck.

2012-12-02 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_ppc.c: Assign copyright ownership to FSF.

	* lib/jit_x86-cpu.c: Correct integer multiplication that was
	generating code with reversed register arguments.

	* check/rpn.ok, check/rpn.tst: New test case file.

2012-12-02 Paulo Andrade <pcpa@gnu.org>

	* lib/jit_x86-cpu.c, lib/jit_x86-sse.c, lib/jit_x86-x87.c:
	Actually change copyright owner to FSF as avertised.

	*  lib/jit_arm-cpu.c,  lib/jit_arm-swf.c,
	lib/jit_arm-vfp.c, lib/jit_arm.c,
	lib/jit_mips-cpu.c, lib/jit_mips-fpu.c, lib/jit_mips.c,
	lib/jit_ppc-cpu.c, lib/jit_ppc-fpu.c, lib/jit_ppc.c: New
	files implementing initial code different jit backends.

	* include/lightning/jit_private.h: Add extra field to the
	private jit_patch_t type, required by the arm port.

	* lib/Makefile.am: Update for the new backend implementation
	files.

2012-12-02 Paulo Andrade <pcpa@gnu.org>

	* check/Makefile.am: Add proper "make clean" rule and missing
	check.sh to EXTRA_DIST.

2012-12-02 Paulo Andrade <pcpa@gnu.org>

	* .gitignore: Update pattern of ignored files.

	* check/Makefile.am: Add rule to build liblightning.la dependency
	in case of running "make check" before building the library.

2012-12-02 Paulo Andrade <pcpa@gnu.org>

	* lightning/Makefile.am, lightning/asm-common.h,
	lightning/core-common.h, lightning/fp-common.h,
	lightning/funcs-common.h, lightning/i386/Makefile.frag,
	lightning/i386/asm-32.h, lightning/i386/asm-64.h,
	lightning/i386/asm.h, lightning/i386/core-32.h,
	lightning/i386/core-64.h, lightning/i386/core.h,
	lightning/i386/fp-32.h, lightning/i386/fp-64.h,
	lightning/i386/fp.h, lightning/i386/funcs.h,
	lightning/ppc/asm.h, lightning/ppc/core.h,
	lightning/ppc/fp.h, lightning/ppc/funcs.h,
	lightning/sparc/asm.h, lightning/sparc/core.h,
	lightning/sparc/fp.h, lightning/sparc/funcs.h:
	Removed. The core logic is used in the new code, and new mips
	and arm ports will be added. At first, sparc will not be
	supported as it has not yet been ported to the new engine.

2012-12-02 Paulo Andrade <pcpa@gnu.org>

	* tests/Makefile.am, tests/3to2.c, tests/3to2.ok, tests/add.c,
	tests/add.ok, tests/allocai.c, tests/allocai.ok, tests/bp.c,
	tests/bp.ok, tests/divi.c, tests/divi.ok, tests/fib.c, tests/fib.ok,
	tests/fibdelay.c, tests/fibdelay.ok, tests/fibit.c, tests/fibit.ok,
	tests/funcfp.c, tests/funcfp.ok, tests/incr.c, tests/incr.ok,
	tests/ldst.c, tests/ldst.ok, tests/ldxi.c, tests/ldxi.ok,
	tests/modi.c, tests/modi.ok, tests/movi.c, tests/movi.ok,
	tests/printf.c, tests/printf.ok, tests/printf2.c, tests/printf2.ok,
	tests/ret.c, tests/ret.ok, tests/rpn.c, tests/rpn.ok, tests/rpnfp.c,
	tests/rpnfp.ok, tests/sete.c, tests/sete.ok, tests/testfp.c,
	tests/testfp.ok, tests-run-test: Removed previous test suite, in
	favor of a newer one in the check subdirectory.

	* check/3to2.ok, check/3to2.tst, check/add.ok, check/add.tst,
	check/allocai.ok, check/allocai.tst, check/bp.ok, check/bp.tst,
	check/divi.ok, check/divi.tst, check/fib.ok, check/fib.tst:
	New sample input for the new test program, loosely matching
	several of the previous test cases.

	* check/Makefile.am: New test suite makefile.

	* check/check.sh, check/run-test: New wrapper files for the
	new test suite.

	* check/lightning.c: New file. The main driver of the new test
	suite, that compiles to a parser of a very simple assembly like
	language, generates jit and executes it.

	* check/all.tst: New file. A generic debug and sample test file
	with a directive to prevent it from being executed, and useful to
	read disassembly of all possible instructions, using a fixed set
	of registers.

	* include/Makefile.am, include/lightning.h,
	include/lightning/Makefile.am, include/lightning/jit_arm.h,
	include/lightning/jit_mips.h, include/lightning/jit_ppc.h,
	include/lightning/jit_private.h, include/lightning/jit_x86.h,
	lib/Makefile.am, lib/jit_disasm.c, lib/jit_print.c,
	lib/jit_x86-cpu.c, lib/jit_x86-sse.c, lib/jit_x86-x87.c,
	lib/jit_x86.c, lib/lightning.c: New files. These files are
	written from scratch, only by <pcpa@gnu.org>, and have now
	copyright assignment to the FSF. This is the core of the new
	lightning rework. Previously it was integrated in code with
	a garbage collector and several custom types like vectors and
	hash tables, so this first code merge with lightning converts
	that code into a library extracting only the jit bits, and at
	first only for x86_64 GNU/Linux.

	* lightning.h, m4/lightning.m4: Removed. These are no longer
	required in the new lightning code.

	.gitignore, Makefile.am, configure.ac: Update for the new
	lightning code.

2012-12-02 Paulo Andrade <pcpa@gnu.org>
	* .cvsignore: Removed for extra cleanup.

	* build-aux: Rename directory to m4.

	* m4: Renamed to "default" name and for consistency with merge
	with code rework to be imported in lightning.

	* .gitignore, configure.ac, Makefile.am, doc/Makefile.am:
	Update for build-aux to m4 rename.

2012-12-01 Paulo Andrade <pcpa@gnu.org>

	* opcode/Makefile.am, opcode/Makefile.in, opcode/ansidecl.h,
	opcode/bfd.h, opcode/dis-asm.h, opcode/dis-buf.c, opcode/disass.c,
	opcode/i386-dis.c, opcode/i386.h, opcode/ppc-dis.c, opcode/ppc-opc.c,
	opcode/ppc.h, opcode/sparc-dis.c, opcode/sparc-opc.c, opcode/sparc.h,
	opcode/sysdep.h: Removed. Do not bundle GNU binutils files.

	* aclocal.m4, configure, Makefile.in, config.h.in, doc/Makefile.in,
	lightning/Makefile.in, tests/Makefile.in: Removed. Do not maintain
	autogenerated files that also generate too much diff noise when
	regenerated in git.

	* build-aux/help2man, build-aux/texinfo.tex, build-aux/texi2dvi:
	Removed. Buildenvironment must have an up to date version from
	upstream installed.

	* build-aux/config.guess, build-aux/config.sub, build-aux/depcomp,
	build-aux/install-sh build-aux/mdate-sh build-aux/missing: Removed.
	Do not maintain a copy of automake files in git. Release tarballs
	must use an up to date version.

	* lightningize.in, doc/lightningize.1: Removed. Do not encourage
	bundling lightning in other packages. It should use a system package
	or a proper thirdy part subdirectory.

	* INSTALL: Removed. Autoreconf removes it and creates a symlink
	when regenerating files, so, avoid conflicts in git and let
	automake create the symlink.

	* .gitignore: Add INSTALL and autogenerated files.

	* configure.ac, Makefile.am: Update for removal of opcode subdir,
	auto generated files and lightningize.

	* tests/Makefile.am, tests/3to2.c, tests/add.c, tests/bp.c,
	tests/fib.c, tests/fibdelay.c, tests/fibit.c, tests/funcfp.c,
	tests/incr.c, tests/printf.c, tests/rpn.c, tests/rpnfp.c,
	tests/sete.c, tests/testfp.c: Update for removal of opcode subdir.

	* doc/Makefile.am: Update for removal of lightningize.

	* configure.ac, lightning/ppc/funcs.h, lightning/sparc/funcs.h,
	lightning/i386/fp.h, lightning/i386/core.h, lightning/i386/asm.h,
	tests/3to2.c, tests/add.c, tests/bp.c, tests/fib.c, tests/fibdelay.c,
	tests/fibit.c, tests/funcfp.c, tests/incr.c, tests/printf.c,
	tests/rpn.c, tests/rpnfp.c, tests/sete.c, tests/testfp.c:
	Remove LIGHTNING_CROSS, it is half supported and incomplete.

	* tests/3to2.c, tests/funcfp.c, tests/rpnfp.c: Remove preprocessor
	check on JIT_FPR. If no hardware registers are available, the backend
	must provide an alternative for software float.

	* lightning/ppc/core.h, lightning/sparc/core.h, tests/Makefile.am:
	Remove JIT_NEED_PUSH_POP. It is absolutely not trivial to implement
	properly on some backends due to stack alignment constraints, and
	whenever it is required, using jit_allocai and using a properly
	aligned stack vector, or a heap buffer, is better.

	* tests/push-pop.c, tests/push-pop.ok: Removed due to
	JIT_NEED_PUSH_POP no longer available.

2011-02-28  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/core-64.h: Add jit_add{c,x}{i,r}_l, jit_mulr_{l,ul}_,
	fix jit_mul{i,r}_{l,ul}.

2010-08-20  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/fp-64.h: Return patch address from jit_bXYr_{f,d}.
	Reported by Paulo César Pereira de Andrade.
	* lightning/ppc/fp.h: Likewise.
	* lightning/sparc/fp.h: Implement FP branches.

2010-08-18  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/fp-64.h: Fix jp in jit_bner_{f,d}.

2010-08-18  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/fp-32.h: Fix -D_ASM_SAFETY compilation.
	Reported by Paulo César Pereira de Andrade.

2010-08-15  Paolo Bonzini  <bonzini@gnu.org>

	* tests/ldst.c: Update.
	* tests/Makefile.am: Use -ffloat-store to compile it.

2010-08-15  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/core.h (jit_ldr_c, jit_ldxr_c, jit_ldr_s,
	jit_ldxr_s): Move...
	* lightning/i386/core-32.h: ... here.
	* lightning/i386/core-64.h (jit_ldr_c, jit_ldxr_c, jit_ldr_s,
	Use movsbq and movswq.

2010-08-10  Paulo César Pereira de Andrade <pcpa@mandriva.com.br>

	* lightning/i386/core-32.h (jit_replace): Use MOVLrr, not MOVLir.
	(jit_movbrm): Check index register as well.
	* lightning/i386/fp-64.h: Add jit_extr_f_d and jit_extr_d_f.
	* lightning/fp-common.h: Add jit_extr_f_d and jit_extr_d_f.

2010-07-28  Paolo Bonzini  <bonzini@gnu.org>

	* tests/Makefile.am: Add ldst test.
	* tests/Makefile.in: Regenerate.
	* tests/ldst.c: New.
	* tests/ldst.ok: New.

2010-07-28  Paolo Bonzini  <bonzini@gnu.org>

	* THANKS: Add Paulo Cesar Pereira de Andrade.
	* doc/porting.texi: Fix ordering of arguments in jit_stxi.
	* lightning/i386/core-32.h (jit_replace): Remove cmp argument.
	* lightning/i386/fp-64.h (jit_movi_f): Fix.

2010-07-26  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/core-32.h (jit_replace): Move here (removed
	2009-03-01).

2010-07-19  Paolo Bonzini  <bonzini@gnu.org>

	* build-aux/lightning.m4: Always set and replace lightning_frag.
	* Makefile.in: Regenerate.
	* aclocal.m4: Regenerate.
	* config.h.in: Regenerate.
	* configure: Regenerate.
	* doc/Makefile.in: Regenerate.
	* doc/lightningize.1: Regenerate.
	* doc/version.texi: Regenerate.
	* lightning/Makefile.in: Regenerate.
	* opcode/Makefile.in: Regenerate.
	* tests/Makefile.in: Regenerate.

2009-03-01  Paolo Bonzini  <bonzini@gnu.org>

        * lightning/i386/core-64.h: Use Mike's macros for x86-64 too.
        * lightning/i386/core.h: Remove jit_replace.

	2009-02-27  Mike Spivey  <mike@comlab.ox.ac.uk>

        * lightning/i386/core.h: Rewrite shift-handling macros.
        * lightning/fp-common.h: Fix jit_extr_{f_d,d_f}.

2009-02-17  Mike Spivey  <mike@comlab.ox.ac.uk>

	* lightning/i386/core.h: Fix blunder in operand order.

2009-02-17  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/fp-32.h: Another fix to jit_fp_btest.

2009-02-17  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/fp-common.h: Define double branches if missing.
	* lightning/i386/asm.h: Define JC and JNC mnemonics.
	* lightning/i386/fp-32.h: Fix jit_fp_btest.  All reported
	by Mike Spivey.

2008-10-09  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/ppc/funcs.h (jit_flush_code): Subtract 1 from end.
	Reported by Eli Barzilay and Matthew Flatt.

2008-08-23  Nix  <nix@esperi.org.uk>

	* lightning/i386/Makefile.frag: fp-32.h and fp-64.h are target files.

2008-07-02  Laurent Michel  <ldm@engr.uconn.edu>

	* lightning/ppc/funcs.h (jit_flush_code): modified the computation
	of start/end. The pointer arithmetic was done without casting. It
	prevented compilation with recent gcc versions. 
	* lightning/ppc/core.h (jit_pushr_i): The offset for the store was
	incorrect. Should have been 4 bytes below SP (not above).
	* lightning/ppc/core.h (jit_popr_i): The offset for the load was 
	incorrect. Should have been 0 (not +8). 

2008-06-17  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/asm-64.h: Forward IMULQir to IMULQirr,
	fix REXQ order for IMULQirr.

2008-06-17  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/core.h: Fix _rN vs. _rR.

2008-06-16  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/core.h: Use jit_save in jit_replace.  Move JIT_R
	definition...
	* lightning/i386/core-32.h: ... here; define jit_save so that
	the core.h has no effect on the 32-bit backend.
	* lightning/i386/core-64.h: Place JIT_R1/JIT_R2 in R10/R11,
	place outgoing arguments in the right spot from the beginning,
	define jit_save, fix jit_reg8/jit_reg16.

2008-06-15  Paolo Bonzini  <bonzini@gnu.org>

        * lightning/i386/core-64.h: Rewrite argument passing to
	support up to 6 arguments and generate less code.

2008-06-14  Laurent Michel  <ldm@thorgal.homelinux.org>

	* lightning/i386/core-64.h (jit_movi_l): When the operand is 0,
	the XOR should be on a quadword.
	* lightning/i386/core-64.h (jit_prolog): Keep 16-byte stack
	alignment.
	(jit_ret): Always use LEAVE.

2008-06-13  Laurent Michel  <ldm@thorgal.homelinux.org>

	* lightning/i386/core-64.h: Add (void) casts for C++ compatibility.
	* lightning/i386/asm.h: Likewise.

2008-06-12  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/core.h: Move JIT_V definition...
	* lightning/i386/core-32.h: ... here.
	* lightning/i386/core-64.h: ... and here.  Avoid dancing between
	RSI/RDI and R12/R13, and place JIT_V1/JIT_V2 in R12/R13.

2008-06-11  Paolo Bonzini  <bonzini@gnu.org>

	* build-aux/lightning.m4: Adjust LIGHTNING_BACKENDS, don't
	use suffix support to distinguish i386/x86_64.
	* lightning/i386/Makefile.frag: Use LIGHTNING_TARGET_FILES
	to distribute *-32.h and *-64.h files now.
	* lightning/i386/asm-i386: Moved to...
	* lightning/i386/asm.h: Include the appropriate subtarget file.
	* lightning/i386/core-i386: Moved to...
	* lightning/i386/core.h: Include the appropriate subtarget file.
	* lightning/i386/fp.h: New, include the appropriate subtarget file.
	* lightning/i386/asm-32: Do not include asm-i386.h.
	* lightning/i386/asm-64.h: Likewise.
	* lightning/i386/core-32: Do not include core-i386.h.
	* lightning/i386/core-64.h: Likewise.
	* lightning/Makefile.am: Adjust for renamed files.

	* configure.ac: Define LIGHTNING_TARGET here.
	* opcode/disass.c: Change list of valid LIGHTNING_TARGET values.

	* lightningize.in: Robustify against missing subtarget files.

2008-06-11  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/core-32.h: Use MOVLir instead of jit_movi_l
	to implement jit_movi_p.

2008-06-11  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/core-32.h: Use separate __APPLE__ and SysV
	prolog/ret macros.  Subtract 12 bytes in __APPLE__ case to
	keep stack aligned, and always use LEAVE in the epilog.

2008-06-11  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/core-i386.h: Fix C++ incompatibility.

2008-06-10  Laurent Michel  <ldm@engr.uconn.edu>

	* lightning/i386/core-i386.h: Fix jit_replace8 for
	case when one of the operands is _EAX.

2008-05-19  Paolo Bonzini  <bonzini@gnu.org>

	* tests/run-test: Avoid CRLF issues on mingw.

2008-03-21  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/core-64.h: Fix jit_{ld,st}{,x}i_{i,l}.
	Remove jit_ld{,x}i_ul.
	* lightning/core-common.h: Make jit_ld{,x}{i,r}_ul
	always a synonym of the _l variant.
	* doc/porting.texi: Document this.

2008-03-19  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/core-64.h: Fix uses of jit_qop_.

2008-03-19  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/core-64.h: Add boolean operations.

2008-03-19  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/asm-64.h: Add LEAQmr.

2008-03-19  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/core-64.h: Misc bugfixes.

2008-03-19  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/core-i386.c: Remove jit_ldr_i, jit_ldxr_i.
	* lightning/i386/core-32.h: Add jit_ldr_i, jit_ldxr_i.
	* lightning/i386/core-64.h: Add jit_ld{r,xr,i,xi}_{ui,l,ul};
	move jit_ldr_i, jit_ldxr_i, jit_str_l, jit_stxr_l with others.

2008-03-19  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/asm-common.h: Add _s32P.

2008-03-19  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/core-64.h: Implement long mul/div/mod.

2008-03-19  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/asm-i386.h: Cast memory address to long for JCCim.

2008-03-15  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/asm-common.h: Add underscores around __unused__
	attribute.

2008-03-15  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/ppc/core.h: Avoid some "value computed is not used"
	warnings.
	* lightnings/tests/allocai.c: Silence other warnings.

2008-03-14  Paolo Bonzini  <bonzini@gnu.org>

	* lightningize.in: Fix some problems (not all).

2008-03-14  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/core-32.h: Avoid some "value computed is not used"
	warnings; reported by Sam Steingold.

2008-03-08  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/core-32.h: Fix stxr_c(_EAX, _EBX, _ESI).

2008-02-13  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/asm-32.h: Avoid redefinition of _r1, reported by
	Sam Steingold.
	* lightning/i386/asm-64.h: Likewise.

2008-02-08  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/asm-i386.h: Don't define _VOID, reported
	by Reini Urban.

2008-02-03  Paolo Bonzini  <bonzini@gnu.org>

	* build-aux/lightning.m4: Add --with-lightning-prefix option, suggested
	by Sam Steingold.

2008-01-14  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/core-64.h: Use CALLsr, not CALLLsr.

2008-01-13  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/core-i386.h: Move jit_calli and jit_callr...
	* lightning/i386/core-32.h: ... here.
	* lightning/i386/core-64.h: Redefine them.

2008-01-05  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/fp-32.h: Fix sub(a,0,a).
	* lightning/tests/3to2.c: Add new testcases.
	* lightning/tests/3to2.ok: Add new testcases.

2008-01-02  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/fp-32.h: Fix sub(a,b,a) with a ~= JIT_FPR0.
	* lightning/tests/3to2.c: New.
	* lightning/tests/3to2.ok: New.

2007-11-07  Paolo Bonzini  <bonzini@gnu.org>

	* opcode/Makefile.am: Fix AM_CPPFLAGS.

2007-08-12  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/core-i386.h: Improve encoding of set* instructions.
	* lightning/i386/core-64.h: Fix jit_bra_l.
	* tests/sete.c: New.
	* tests/sete.ok: New.

2007-06-29  Paolo Bonzini  <bonzini@gnu.org>

	* tests/bp.c: Upgrade to GPL/LGPLv3.
	* lightning/i386/asm-32.h: Upgrade to GPL/LGPLv3.
	* lightning/i386/asm-64.h: Upgrade to GPL/LGPLv3.
	* lightning/i386/core-32.h: Upgrade to GPL/LGPLv3.
	* lightning/i386/core-64.h: Upgrade to GPL/LGPLv3.
	* lightning/i386/fp-64.h: Upgrade to GPL/LGPLv3.
	* lightning/sparc/asm.h: Upgrade to GPL/LGPLv3.
	* lightning/sparc/core.h: Upgrade to GPL/LGPLv3.
	* lightning/sparc/fp.h: Upgrade to GPL/LGPLv3.
	* lightning/sparc/funcs.h: Upgrade to GPL/LGPLv3.
	* lightning/i386/asm-i386.h: Upgrade to GPL/LGPLv3.
	* lightning/i386/core-i386.h: Upgrade to GPL/LGPLv3.
	* lightning/i386/fp-32.h: Upgrade to GPL/LGPLv3.
	* lightning/i386/funcs.h: Upgrade to GPL/LGPLv3.
	* lightning/ppc/asm.h: Upgrade to GPL/LGPLv3.
	* lightning/ppc/core.h: Upgrade to GPL/LGPLv3.
	* lightning/ppc/fp.h: Upgrade to GPL/LGPLv3.
	* lightning/ppc/funcs.h: Upgrade to GPL/LGPLv3.
	* lightning.h: Upgrade to GPL/LGPLv3.
	* tests/add.c: Upgrade to GPL/LGPLv3.
	* tests/fib.c: Upgrade to GPL/LGPLv3.
	* tests/testfp.c: Upgrade to GPL/LGPLv3.
	* tests/fibdelay.c: Upgrade to GPL/LGPLv3.
	* tests/fibit.c: Upgrade to GPL/LGPLv3.
	* tests/funcfp.c: Upgrade to GPL/LGPLv3.
	* tests/incr.c: Upgrade to GPL/LGPLv3.
	* tests/printf.c: Upgrade to GPL/LGPLv3.
	* tests/printf2.c: Upgrade to GPL/LGPLv3.
	* tests/rpn.c: Upgrade to GPL/LGPLv3.
	* tests/rpnfp.c: Upgrade to GPL/LGPLv3.
	* lightning/asm-common.h: Upgrade to GPL/LGPLv3.
	* lightning/core-common.h: Upgrade to GPL/LGPLv3.
	* lightning/fp-common.h: Upgrade to GPL/LGPLv3.
	* lightning/funcs-common.h: Upgrade to GPL/LGPLv3.
	* opcode/dis-buf.c: Upgrade to GPL/LGPLv3.
	* opcode/disass.c: Upgrade to GPL/LGPLv3.
	* opcode/i386-dis.c: Upgrade to GPL/LGPLv3.
	* opcode/sparc-dis.c: Upgrade to GPL/LGPLv3.
	* opcode/sparc-opc.c: Upgrade to GPL/LGPLv3.
	* lightningize.in: Upgrade to GPL/LGPLv3.
	* opcode/bfd.h: Upgrade to GPL/LGPLv3.
	* opcode/i386.h: Upgrade to GPL/LGPLv3.
	* opcode/sparc.h: Upgrade to GPL/LGPLv3.

2007-01-26  Thomas Girard  <thomas.g.girard@free.fr>

	* lightning/Makefile.am: Add clean-local target.

2006-12-02  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/asm-i386.h: Add CVTTS?2SIL.
	* lightning/i386/asm-64.h: Add CVTTS?2SIQ.
	* lightning/i386/fp-64.h: Use it.

	* lightning/Makefile.am: Place files in nodist_lightning_HEADERS.

2006-11-23  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/core-common.h: Add casts in "*i_p" variants.
	* lightning/i386/asm-32.h: Add _r1.
	* lightning/i386/asm-64.h: Likewise, and add SSE instructions.
	* lightning/i386/asm-i386.h: Merge SSE instructions from Gwenole.
	Use short form for 16-bit AX instructions.  Remove _r1
	* lightning/i386/core-64.h: Add FP ABI support in its infancy.
	* lightning/i386/core-i386.h: Move jit_arg_f and jit_arg_d...
	* lightning/i386/core-32.h: ... and jit_prepare_f and jit_prepare_d...
	* lightning/i386/fp-32.h: ... here.
	* lightning/i386/fp-64.h: Write the code.
	* lightning/sparc/fp.h: Fix jit_extr_{f_d,d_f} register order.
	
2006-11-22  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/asm-i386.h: Move x86-64 instructions...
	* lightning/i386/asm-64.h: ... here.
	* lightning/i386/fp-32.h: Fix bugfixes worked around in froofyJIT.
	Add JIT_FPRET.
	* lightning/sparc/fp.h: Likewise.
	* lightning/ppc/fp.h: Likewise.
	* lightning/fp-common.h: Adjust for JIT_FPRET.
	* tests/funcfp.c: Adjust for JIT_FPRET.
	* tests/rpnfp.c: Adjust for JIT_FPRET.

2006-11-20  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/asm-i386.h:  Add an underscore to macros without
	a parameter.

2006-11-20  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/core-i386.h: Move jit_movip, jit_check8, jit_reg8,
	jit_reg16, jit_movbrm...
	* lightning/i386/core-32.h: ... here.
	* lightning/i386/core-64.h: Redefine them.  Fix other bugs.

	* tests/printf.c: Do not do a varargs call.

2006-11-20  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/asm-i386.h: Check in rewrite from Basilisk II.
	* lightning/i386/asm-32.h: Adjust.
	* lightning/i386/asm-64.h: Adjust.
	* lightning/i386/fp-32.h: Adjust.

	* lightning/i386/core-32.h: Adjust.  Add jit_{ld,ldx,st,stx}i*.
	* lightning/i386/core-64.h: Adjust.  Add jit_{ld,ldx,st,stx}i*.
	* lightning/i386/core-i386.h: Adjust. Remove these patterns.

2006-11-20  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/asm-i386.h: Merge 64-bit cleanliness changes from
	mzscheme.
	Add SSE.
	* lightning/i386/asm-64.h: Likewise.

2006-11-20  Paolo Bonzini  <bonzini@gnu.org>
	    Ludovic Courtes  <ludo@chbouib.org>

	* lightning/i386/core-32.h: Disable jit_push and jit_pop if stack not
	needed.
	* lightning/i386/core-64.h: Disable jit_push and jit_pop if stack not
	needed.
	* lightning/sparc/core.h: Merge final implementation of jit_pushr and
	jit_popr.
	* lightning/ppc/core.h: Fix implementation of jit_pushr and jit_popr to
	work (more or less) across function calls.

	* tests/push-pop.c, tests/push-pop.ok: New test.
	* tests/Makefile.am: Run it.

2006-11-20  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/asm-common.h: Make 64-bit safe.
	* lightning/i386/funcs.h: Make 64-bit safe.

	* lightning/i386/asm-64.h: More merge from mzscheme.
	* lightning/i386/asm-i386.h: More merge from mzscheme.
	* lightning/i386/core-32.h: More merge from mzscheme.
	* lightning/i386/core-64.h: More merge from mzscheme.
	* lightning/i386/core-i386.h: More merge from mzscheme.

	* tests/rpnfp.c, tests/testfp.c, tests/funcfp.c: Skip if no
	floating-point support.

2006-11-04  Paolo Bonzini  <bonzini@gnu.org>

	* tests/rpn.c: Remove pushr/popr.

2006-11-04  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/ppc/core.h: Implement jit_allocai, define JIT_FP to be R1.
	* lightning/ppc/funcs.h: Store frame size into _jitl.  Store R1 before
	the STMW, so that the offset is unchanged when we patch the STMW.
	* lightning/i386/core.h: Define JIT_FP to be EBP.
	* lightning/i386/core-32.h: Implement jit_allocai, put LEAVE in the
	epilog if jit_allocai was used.
	* lightning/i386/core-64.h: Implement jit_allocai, put LEAVE in the
	epilog if jit_allocai was used.

2006-11-04  Ludovic Courtes  <ludo@chbouib.org>

	* lightning/sparc/core.h: Implement jit_allocai.
	* tests/allocai.c: New.
	* tests/Makefile.am: Point to new tests.

2006-11-03  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/ppc/core.h: Fix jit_bms using BNE rather than BGT.
	"AND." does signed comparisons.

2006-10-31  Paolo Bonzini  <bonzini@gnu.org>

	* doc/porting.texi: Rename JIT_FP to JIT_AP.
	* lightning/core-common.h: Likewise.
	* lightning/i386/core-i386.h: Likewise.
	* lightning/fp-common.h: Provide default versions of jit_getarg_[fd].
	* lightning/i386/fp-32.h: Don't provide jit_getarg_[fd].
	* lightning/ppc/fp.h: Likewise.

2006-10-31  Ludovic Courtes  <ludo@chbouib.org>

        * doc/using.texi (The instruction set): Clarified the use of `JIT_RET' and
        documented `jit_retval'.
        * tests/ret.c (generate_function_proxy): After `jit_finish', use
        `jit_retval_i' to move FUNC's return value into the correct register.

2006-10-31  Paolo Bonzini  <bonzini@gnu.org>
	    Ludovic Courtes  <ludo@chbouib.org>

	* tests/divi.c, tests/divi.ok, tests/movi.c, tests/movi.ok: New.
	* tests/ldxi.c: Ensure large pointer is generated.
	* tests/Makefile.am: Point to new tests.
	* lightning.h: Include funcs-common.h before funcs.h.
	* lightning/sparc/core.h: Fix bugs in modi/divi.

2006-10-30  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/Makefile.am: Use "ln -sf".
	* lightning/core-common.h: Define jit_negr_l if necessary.

2006-10-30  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/asm.h (MOVS*, MOVZ*): Use correct _r[124] macros.

2006-10-29  Paolo Bonzini  <bonzini@gnu.org>

	* configure.ac: Use lightning.m4 macros.
	* lightning.m4: Refactor to use common code in configure.ac.  Move...
	* build-aux/lightning.m4: ... here.
	* lightningize.in: Support suffixes.
	* opcode/disass.in: Adapt to changes in configure.ac.

	* lightning/ppc/funcs.h: Use __APPLE__ instead of _CALL_DARWIN.
	* lightning/i386/core-32.h: Likewise.

2006-10-26  Paolo Bonzini  <bonzini@gnu.org>

	* configure.ac: Fix compilation test.
	* lightning/Makefile.am: Symlink LIGHTNING_TARGET_FILES in
	non-distribution mode.
	* lightning/i386/Makefile.frag: Use LIGHTNING_TARGET_FILES.

2006-10-26  Paolo Bonzini  <bonzini@gnu.org>

	* configure.ac: Subst cpu.
	* lightning/core-common.h: Make tests pass on i386.
	* lightning/i386/asm-32.h: Make tests pass on i386.
	* lightning/i386/asm-64.h: Make tests pass on i386.
	* lightning/i386/asm-i386.h: Make tests pass on i386.
	* lightning/i386/core-32.h: Make tests pass on i386.
	* lightning/i386/core-64.h: Make tests pass on i386.
	* lightning/i386/core-i386.h: Make tests pass on i386.
	* tests/Makefile.am: Include files from cpu directory.

2006-10-26  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/asm.h: Move to asm-i386.h
	* lightning/i386/asm-32.h: New, from Matthew Flatt.
	* lightning/i386/asm-64.h: New, from Matthew Flatt.
	* lightning/i386/core.h: Move to core-i386.h
	* lightning/i386/core-32.h: New, from Matthew Flatt.
	* lightning/i386/core-64.h: New, from Matthew Flatt.
	* lightning/i386/fp.h: Move to fp-32.h
	* lightning/i386/fp-64.h: New, dummy.
	* lightning/i386/Makefile.frag: New.
	* lightning/Makefile.am: Support per-target Makefile fragments.
	* configure.ac: Support per-target Makefile fragments and CPU suffixes.

2006-10-16  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/i386.h (jit_flush_code): Fix syntax error. :-(

2006-07-06  Paolo Bonzini  <bonzini@gnu.org>
	    Ludovic Courtes  <ludovic.courtes@laas.fr>

	* doc/using.texi: Clarify "Using autoconf" section
	and rename it to "Bundling lightning"
	* lightning.m4: Work also if lightning is not bundled.

2006-07-06  Paolo Bonzini  <bonzini@gnu.org>
	    Ludovic Courtes  <ludovic.courtes@laas.fr>

	* lightning/ppc/core.h (_jit_mod): Replace with...
	(_jit_mod_big, _jit_mod_small): ... these.
	(jit_modi_i, jit_modi_ui): Rewrite.
	* tests/modi.c, tests/modi.ok: New tests.

2006-05-18  Matthew Flatt  <mflatt@cs.utah.edu>

	* lightning/i386/asm.h: Fix test for extending the mprotect area
	towards lower addresses.

2006-05-16  Bruno Haible  <bruno@clisp.org>

	* lightning/asm-common.h: Don't use __func__ nor __FUNCTION__ if
	not compiling with GNU C.

2006-02-16  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/ppc/core.h: Fix jit_ldxi_* with big displacement.

2006-01-23  Paolo Bonzini  <bonzini@gnu.org>

	* configure.ac: Fix comments in config.h.in.
	
2005-11-25  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/sparc/fp.h: Fix header comment.
	* lightning/ppc/fp.h: Fix header comment.

2005-04-27  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/asm.h (JCm, JCSm, JNCm, JNCSm): New.

2004-11-26  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/ppc/funcs.h (_jit_epilog): Remove unused variable.

2004-11-13  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/funcs.h [__linux__]: Include sys/mman.h.

2004-11-09  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/sparc/fp.h: Fix fp-to-integer conversions.
	* lightning/ppc/testfp.c: Test fp-to-integer conversions
	of integer numbers.
	* lightning/ppc/testfp.ok: Adjust for the above.

2004-11-08  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/ppc/testfp.c: Always flush code before
	testing it.

2004-11-08  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/ppc/fp.h: Do not clobber f31.

2004-11-08  Paolo Bonzini  <bonzini@gnu.org>

	* lightning.h: New name of...
	* lightning-inst.h: ... this file.
	* lightning.h.in: Removed.

	* opcodes/disass.c: Include config.h.
	* tests/add.c: Include config.h.
	* tests/bp.c: Include config.h.
	* tests/fib.c: Include config.h.
	* tests/fibdelay.c: Include config.h.
	* tests/fibit.c: Include config.h.
	* tests/funcfp.c: Include config.h.
	* tests/incr.c: Include config.h.
	* tests/printf.c: Include config.h.
	* tests/printf2.c: Include config.h.
	* tests/rpn.c: Include config.h.
	* tests/rpnfp.c: Include config.h.
	* tests/testfp.c: Include config.h.

2004-10-12  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/fp.h: Fix bugs in conditional branches.

2004-10-10  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/funcs.h: Fix pasto in jit_flush_code.

2004-10-08  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/ppc/fp.h: Optimized conditional branches.

2004-09-20  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/ppc/asm.h: Fix more typos.

2004-09-20  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/ppc/asm.h: Fix typos, replace `26' with JIT_AUX.

2004-09-20  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/ppc/fp.h: Added conditional branches.

2004-09-18  Laurent Michel  <ldm@thorgal.homelinux.org>

	* lightning/ppc/fp.h (jit_unler_d, jit_unltr_d, jit_unger_d,
	jit_ungtr_d, jit_ltgt_d, jit_uneq_d): Implemented missing tests
	to fully support testfp.
	(jit_floorr_d_i, jit_ceilr_d_i, jit_roundr_d_i, jit_truncr_d_i):
	New macros.
	* lightning/ppc/asm.h: Added missing opcodes FCTIWZ and MTFSFI.
	* lightning/ppc/funcs.h (_jit_prolog): Fixed minor mistake in
	the initialization of _jitl.nextarg_geti, relying on the
	JIT_AUX macro as well to get the register offset.

2004-09-07  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/ppc/funcs.h: Fix typo.

2004-09-06  Paolo Bonzini  <bonzini@gnu.org>

	* tests/funcfp.c: Use %g.  Remove C99 variable declarations.
	* tests/testfp.c: Don't use __builtin_nan.

	* lightning/ppc/core.h: Add three V registers.
	* lightning/ppc/funcs.h: Adjust.

	* lightning/sparc/core.h: Some fixes related to FP argument passing.
	Move R0 to %g2, use %o7 for JIT_BIG2.
	* lightning/sparc/fp.h: Some fixes related to FP argument passing.

2004-09-02  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/sparc/core.h: Add another V register,
	move R0 to %o7.

2004-07-15  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/funcs.h: Implement jit_flush_code,
	in order to support Fedora's exec-shield.

2004-07-14  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/core-common.h: Add more jit_extr_*_* macros.
	* lightning/doc/using.texi: Be clearer about the order
	of arguments in jit_extr_*_*.
	* lightning/doc/porting.texi: Add more jit_extr_*_* macros.
	* lightning/i386/fp.h: Fix typo in jit_extr_i_d.

2004-07-14  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/ppc/funcs.h: Adjust offset of LR into
	stack frame if running under the Darwin ABI.

2004-07-13  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/fp.h: Rename jit_exti_d to jit_extr_i_d.

2004-07-13  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/ppc/core.h: Fix thinko.

	* lightning/i386/core.h: Fix jit_lti_ui.
	* lightning/core-common.h: Add missing macros.

	* lightning/ppc/fp.h: Rename jit_neg_* to jit_negr_*.
	* lightning/i386/fp.h: Rename jit_neg_* to jit_negr_*.
	* lightning/sparc/fp.h: Rename jit_neg_* to jit_negr_*.
	* lightning/fp-common.h: Rename jit_neg_* to jit_negr_*.
	* doc/porting.texi: Add undocumented macros.

2004-07-12  Paolo Bonzini  <bonzini@gnu.org>

	* doc/porting.texi: Add missing macros.

2004-07-12  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/ppc/funcs.h: Don't generate trampolines.
	Separate prolog and epilog generation.
	* lightning/ppc/core.h: Generate epilog explicitly.
	Don't reserve r31 anymore.
	* lightning/core-common.h: Remove call to jit_setup_code.

2004-07-09  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/lightning.h.in: Avoid preprocessor warnings.
	* lightning/lightning-inst.h: Likewise.

	* lightning/i386/core.h: Define JIT_R, JIT_R_NUM, JIT_V,
	JIT_V_NUM.
	* lightning/ppc/core.h: Likewise.
	* lightning/sparc/core.h: Likewise.
	* lightning/i386/fp.h: Define JIT_FPR, JIT_FPR_NUM.
	* lightning/ppc/fp.h: Likewise.
	* lightning/sparc/fp.h: Likewise.
	* lightning/core-common.h: Define fixed register names.
	* lightning/fp-common.h: Likewise for FP regs.

2004-07-09  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/ppc/funcs.h: Fix location where return address
	is stored.
	* lightning/i386/asm.h: Add a trailing _ to opcodes without
	any parameter.
	* lightning/i386/core.h: Adjust for the above.

2004-04-15  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/fp.h: Change "and" to "_and"
	to satisfy C++ compilers.

2004-04-14  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/sparc/fp.h: Use memcpy to implement jit_movi.
	* lightning/ppc/fp.h: Use memcpy to implement jit_movi.
	Move floating-point opcodes...
	* lightning/ppc/asm.h: ... here.

2004-04-14  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/core-common.h: Add jit_finishr.
	* lightning/ppc/core.h: Add jit_callr and jit_finishr.
	* lightning/i386/core.h: Add jit_callr.
	* lightning/sparc/core.h: Add jit_callr.  Fix typo.

2004-04-14  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/core.h: Fix pasto in jit_b*_ui.

2004-03-30  Laurent Michel

	* lightning/ppc: Implement PowerPC floating point
	(ChangeLog entry missing).

2004-03-12  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/fp-common.h: Load/store macros are not the
	same for floats and doubles anywhere, but jit_retval may be.
	* lightning/i386/asm.h: Fix = mistaken for == in ESCrri.
	* lightning/i386/core.h: Fix typo in jit_prepare_[fd].
	* lightning/i386/fp.h: Rewritten.
	* tests/testfp.c: Add tests for unordered comparisons.
	* tests/testfp.ok: Add results.

2004-03-15  Paolo Bonzini  <bonzini@gnu.org>

	Merge changes from Laurent Michel.

	* lightning/asm-common.h: Add _jit_I_noinc.
	* lightning/core-common.h: Support jit_init,
	jit_setup_code, jit_patch_at.  Return patchable IP from
	jit_movi_p.
	* lightning/funcs-common.h: Provide defaults
	for jit_setup_code, jit_start_pfx, jit_end_pfx
	* lightning/i386/core.h: Add jit_patch_at, jit_patch_movi.
	* lightning/ppc/core.h: Likewise.
	* lightning/sparc/core.h: Likewise.
	* lightning/ppc/asm.h: Fix generation of branch destination
	displacements in _FB and _BB
	* lightning/ppc/core.h: Generate trampolines in the user
	area.
	* lightning/ppc/funcs.h: Add a few casts.
	* tests/bc.c: New testcase.

	* lightning/i386/asm.h: Wrap into #ifndef LIGHTNING_DEBUG.
	* lightning/ppc/asm.h: Wrap into #ifndef LIGHTNING_DEBUG.
	* lightning/sparc/asm.h: Wrap into #ifndef LIGHTNING_DEBUG.


2004-03-09  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/sparc/fp.h: Rewrite.  Move macros for
	FP code generation...
	* lightning/sparc/asm.h: ... here.
	* lightning/sparc/core.h: Rename jit_prepare to
	jit_prepare_i, jit_retval to jit_retval_i.
	* lightning/ppc/core.h: Rename jit_prepare to
	jit_prepare_i, jit_retval to jit_retval_i.
	* lightning/i386/core.h: Rename jit_prepare to
	jit_prepare_i, jit_retval to jit_retval_i.
	* lightning/core-common.h: Provide backwards
	compatible synonyms for the above.
	* lightning/fp-common.h: Rewrite.
	* lightning-inst.h: Include fp unconditionally.
	* lightning.h.in: Include fp unconditionally.
	* tests/Makefile.am: Enable fp tests.
	* tests/fib.c: Use jit_retval_i.
	* tests/fibit.c: Cast codeBuffer to char *.
	* tests/funcfp.c: Use new fp macros.
	* tests/printf.c: Use jit_retval_i.
	* tests/rpnfp.c: Use new fp macros.
	* tests/testfp.c: Use new fp macros.

2004-03-02  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/core.h: generate correct code when
	doing lt/le/ge/etc. on ESI and EDI.  Use MOVZX/MOVSX
	where possible.
	* lightning/i386/asm.h: Add macros for MOVZX/MOVSX.
	Move macros for x87 here, and add many of them.
	* lightning/i386/fp.h: Use new macros for x87.

2004-02-06  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/core.h: avoid generating MOV reg, reg.
	* lightning/sparc/core.h: fix several bugs.
	* lightning/ppc/core.h: fix several bugs.
	* tests/rpn.c: rewritten.

2004-01-08  Paolo Bonzini  <bonzini@gnu.org>

	* tests/rpnfp.c: new example, suggested by Basile
	Starynkevitch.
	* tests/rpnfp.ok: new example.

2003-12-12  Paolo Bonzini  <bonzini@gnu.org>

	* tests/add.c: new test, suggested by Steve Dekorte.
	* tests/add.c: new test.

2003-11-14  Paolo Bonzini  <bonzini@gnu.org>
	    John Redford <eirenik@hotmail.com>

	* lightning/asm-common.h: change the 'pc' field of _jit to
	be a union of various data types, because ISO C99 doesn't
	permit using ++ on a = cast.  Change the incremented casts of
	_jit.pc to be _jit.x.uc_pc, _jit.x.us_pc, etc.
	* all files: change all non-cast instances of _jit.pc to be
	_jit.x.pc.
	* lightning/i386/core.h: remove casts from jit_might.

2003-05-25  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/core.h: use JITSORRY in jit_replace
	* lightning/asm-common.h: define JITSORRY

2003-05-14  Paolo Bonzini  <bonzini@gnu.org>

	* lightning/i386/core.h: fix missing comma in several
	load/store macros.
	* lightning/core-common.h: fix long/unsigned long/pointer
	jit_pushr/jit_popr.
	* lightning/ppc/funcs.h: correctly align stack pointer

No changelogs for the assemblers (lightning directory) until 1.0
	
2003-03-27  Paolo Bonzini  <bonzini@gnu.org>

	* tests/printf2.c: new test

2001-05-03  Paolo Bonzini  <bonzini@gnu.org>

	* tests/printf.c: made the message platform independent

2001-01-19  Paolo Bonzini  <bonzini@gnu.org>

	* configure.in: support cross-assembling
	
	* disass/bfd.h, disass/dis-asm.h, disass/dis-buf.c,
	disass/i386-dis.c, disass/i386.h, disass/ppc-dis.c,
	disass/ppc.h, disass/ppc-opc.c, disass/sparc-dis.c,
	disass/sparc.h, disass/sparc-opc.c: new files, from GDB

	* disass/disass.c, disass/Makefile.am: new files

	* tests/fib.c, tests/fibit.c, tests/incr.c, tests/printf.c,
	tests/rpn.c, tests/testfp.c, tests/Makefile.am: support
	disassembling