| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100 |
- /*
- * r6000_fpu.S: Save/restore floating point context for signal handlers.
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1996 by Ralf Baechle
- *
- * Multi-arch abstraction and asm macros for easier reading:
- * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
- */
- #include <asm/asm.h>
- #include <asm/fpregdef.h>
- #include <asm/mipsregs.h>
- #include <asm/asm-offsets.h>
- #include <asm/regdef.h>
- .set noreorder
- .set mips2
- .set push
- SET_HARDFLOAT
- /**
- * _save_fp_context() - save FP context from the FPU
- * @a0 - pointer to fpregs field of sigcontext
- * @a1 - pointer to fpc_csr field of sigcontext
- *
- * Save FP context, including the 32 FP data registers and the FP
- * control & status register, from the FPU to signal context.
- */
- LEAF(_save_fp_context)
- mfc0 t0,CP0_STATUS
- sll t0,t0,2
- bgez t0,1f
- nop
- cfc1 t1,fcr31
- /* Store the 16 double precision registers */
- sdc1 $f0,0(a0)
- sdc1 $f2,16(a0)
- sdc1 $f4,32(a0)
- sdc1 $f6,48(a0)
- sdc1 $f8,64(a0)
- sdc1 $f10,80(a0)
- sdc1 $f12,96(a0)
- sdc1 $f14,112(a0)
- sdc1 $f16,128(a0)
- sdc1 $f18,144(a0)
- sdc1 $f20,160(a0)
- sdc1 $f22,176(a0)
- sdc1 $f24,192(a0)
- sdc1 $f26,208(a0)
- sdc1 $f28,224(a0)
- sdc1 $f30,240(a0)
- jr ra
- sw t0,(a1)
- 1: jr ra
- nop
- END(_save_fp_context)
- /**
- * _restore_fp_context() - restore FP context to the FPU
- * @a0 - pointer to fpregs field of sigcontext
- * @a1 - pointer to fpc_csr field of sigcontext
- *
- * Restore FP context, including the 32 FP data registers and the FP
- * control & status register, from signal context to the FPU.
- */
- LEAF(_restore_fp_context)
- mfc0 t0,CP0_STATUS
- sll t0,t0,2
- bgez t0,1f
- lw t0,(a1)
- /* Restore the 16 double precision registers */
- ldc1 $f0,0(a0)
- ldc1 $f2,16(a0)
- ldc1 $f4,32(a0)
- ldc1 $f6,48(a0)
- ldc1 $f8,64(a0)
- ldc1 $f10,80(a0)
- ldc1 $f12,96(a0)
- ldc1 $f14,112(a0)
- ldc1 $f16,128(a0)
- ldc1 $f18,144(a0)
- ldc1 $f20,160(a0)
- ldc1 $f22,176(a0)
- ldc1 $f24,192(a0)
- ldc1 $f26,208(a0)
- ldc1 $f28,224(a0)
- ldc1 $f30,240(a0)
- jr ra
- ctc1 t0,fcr31
- 1: jr ra
- nop
- END(_restore_fp_context)
- .set pop /* SET_HARDFLOAT */
|
