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- /* memcpy.S: Sparc optimized memcpy and memmove code
- * Hand optimized from GNU libc's memcpy and memmove
- * Copyright (C) 1991,1996 Free Software Foundation
- * Copyright (C) 1995 Linus Torvalds (Linus.Torvalds@helsinki.fi)
- * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
- * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
- * Copyright (C) 1996 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
- */
- #include <asm/export.h>
- #define FUNC(x) \
- .globl x; \
- .type x,@function; \
- .align 4; \
- x:
- /* Both these macros have to start with exactly the same insn */
- #define MOVE_BIGCHUNK(src, dst, offset, t0, t1, t2, t3, t4, t5, t6, t7) \
- ldd [%src + (offset) + 0x00], %t0; \
- ldd [%src + (offset) + 0x08], %t2; \
- ldd [%src + (offset) + 0x10], %t4; \
- ldd [%src + (offset) + 0x18], %t6; \
- st %t0, [%dst + (offset) + 0x00]; \
- st %t1, [%dst + (offset) + 0x04]; \
- st %t2, [%dst + (offset) + 0x08]; \
- st %t3, [%dst + (offset) + 0x0c]; \
- st %t4, [%dst + (offset) + 0x10]; \
- st %t5, [%dst + (offset) + 0x14]; \
- st %t6, [%dst + (offset) + 0x18]; \
- st %t7, [%dst + (offset) + 0x1c];
- #define MOVE_BIGALIGNCHUNK(src, dst, offset, t0, t1, t2, t3, t4, t5, t6, t7) \
- ldd [%src + (offset) + 0x00], %t0; \
- ldd [%src + (offset) + 0x08], %t2; \
- ldd [%src + (offset) + 0x10], %t4; \
- ldd [%src + (offset) + 0x18], %t6; \
- std %t0, [%dst + (offset) + 0x00]; \
- std %t2, [%dst + (offset) + 0x08]; \
- std %t4, [%dst + (offset) + 0x10]; \
- std %t6, [%dst + (offset) + 0x18];
- #define MOVE_LASTCHUNK(src, dst, offset, t0, t1, t2, t3) \
- ldd [%src - (offset) - 0x10], %t0; \
- ldd [%src - (offset) - 0x08], %t2; \
- st %t0, [%dst - (offset) - 0x10]; \
- st %t1, [%dst - (offset) - 0x0c]; \
- st %t2, [%dst - (offset) - 0x08]; \
- st %t3, [%dst - (offset) - 0x04];
- #define MOVE_LASTALIGNCHUNK(src, dst, offset, t0, t1, t2, t3) \
- ldd [%src - (offset) - 0x10], %t0; \
- ldd [%src - (offset) - 0x08], %t2; \
- std %t0, [%dst - (offset) - 0x10]; \
- std %t2, [%dst - (offset) - 0x08];
- #define MOVE_SHORTCHUNK(src, dst, offset, t0, t1) \
- ldub [%src - (offset) - 0x02], %t0; \
- ldub [%src - (offset) - 0x01], %t1; \
- stb %t0, [%dst - (offset) - 0x02]; \
- stb %t1, [%dst - (offset) - 0x01];
- .text
- .align 4
- FUNC(memmove)
- EXPORT_SYMBOL(memmove)
- cmp %o0, %o1
- mov %o0, %g7
- bleu 9f
- sub %o0, %o1, %o4
- add %o1, %o2, %o3
- cmp %o3, %o0
- bleu 0f
- andcc %o4, 3, %o5
- add %o1, %o2, %o1
- add %o0, %o2, %o0
- sub %o1, 1, %o1
- sub %o0, 1, %o0
-
- 1: /* reverse_bytes */
- ldub [%o1], %o4
- subcc %o2, 1, %o2
- stb %o4, [%o0]
- sub %o1, 1, %o1
- bne 1b
- sub %o0, 1, %o0
- retl
- mov %g7, %o0
- /* NOTE: This code is executed just for the cases,
- where %src (=%o1) & 3 is != 0.
- We need to align it to 4. So, for (%src & 3)
- 1 we need to do ldub,lduh
- 2 lduh
- 3 just ldub
- so even if it looks weird, the branches
- are correct here. -jj
- */
- 78: /* dword_align */
- andcc %o1, 1, %g0
- be 4f
- andcc %o1, 2, %g0
- ldub [%o1], %g2
- add %o1, 1, %o1
- stb %g2, [%o0]
- sub %o2, 1, %o2
- bne 3f
- add %o0, 1, %o0
- 4:
- lduh [%o1], %g2
- add %o1, 2, %o1
- sth %g2, [%o0]
- sub %o2, 2, %o2
- b 3f
- add %o0, 2, %o0
- FUNC(memcpy) /* %o0=dst %o1=src %o2=len */
- EXPORT_SYMBOL(memcpy)
- sub %o0, %o1, %o4
- mov %o0, %g7
- 9:
- andcc %o4, 3, %o5
- 0:
- bne 86f
- cmp %o2, 15
- bleu 90f
- andcc %o1, 3, %g0
- bne 78b
- 3:
- andcc %o1, 4, %g0
- be 2f
- mov %o2, %g1
- ld [%o1], %o4
- sub %g1, 4, %g1
- st %o4, [%o0]
- add %o1, 4, %o1
- add %o0, 4, %o0
- 2:
- andcc %g1, 0xffffff80, %g0
- be 3f
- andcc %o0, 4, %g0
- be 82f + 4
- 5:
- MOVE_BIGCHUNK(o1, o0, 0x00, o2, o3, o4, o5, g2, g3, g4, g5)
- MOVE_BIGCHUNK(o1, o0, 0x20, o2, o3, o4, o5, g2, g3, g4, g5)
- MOVE_BIGCHUNK(o1, o0, 0x40, o2, o3, o4, o5, g2, g3, g4, g5)
- MOVE_BIGCHUNK(o1, o0, 0x60, o2, o3, o4, o5, g2, g3, g4, g5)
- sub %g1, 128, %g1
- add %o1, 128, %o1
- cmp %g1, 128
- bge 5b
- add %o0, 128, %o0
- 3:
- andcc %g1, 0x70, %g4
- be 80f
- andcc %g1, 8, %g0
- sethi %hi(80f), %o5
- srl %g4, 1, %o4
- add %g4, %o4, %o4
- add %o1, %g4, %o1
- sub %o5, %o4, %o5
- jmpl %o5 + %lo(80f), %g0
- add %o0, %g4, %o0
- 79: /* memcpy_table */
- MOVE_LASTCHUNK(o1, o0, 0x60, g2, g3, g4, g5)
- MOVE_LASTCHUNK(o1, o0, 0x50, g2, g3, g4, g5)
- MOVE_LASTCHUNK(o1, o0, 0x40, g2, g3, g4, g5)
- MOVE_LASTCHUNK(o1, o0, 0x30, g2, g3, g4, g5)
- MOVE_LASTCHUNK(o1, o0, 0x20, g2, g3, g4, g5)
- MOVE_LASTCHUNK(o1, o0, 0x10, g2, g3, g4, g5)
- MOVE_LASTCHUNK(o1, o0, 0x00, g2, g3, g4, g5)
- 80: /* memcpy_table_end */
- be 81f
- andcc %g1, 4, %g0
- ldd [%o1], %g2
- add %o0, 8, %o0
- st %g2, [%o0 - 0x08]
- add %o1, 8, %o1
- st %g3, [%o0 - 0x04]
- 81: /* memcpy_last7 */
- be 1f
- andcc %g1, 2, %g0
- ld [%o1], %g2
- add %o1, 4, %o1
- st %g2, [%o0]
- add %o0, 4, %o0
- 1:
- be 1f
- andcc %g1, 1, %g0
- lduh [%o1], %g2
- add %o1, 2, %o1
- sth %g2, [%o0]
- add %o0, 2, %o0
- 1:
- be 1f
- nop
- ldub [%o1], %g2
- stb %g2, [%o0]
- 1:
- retl
- mov %g7, %o0
- 82: /* ldd_std */
- MOVE_BIGALIGNCHUNK(o1, o0, 0x00, o2, o3, o4, o5, g2, g3, g4, g5)
- MOVE_BIGALIGNCHUNK(o1, o0, 0x20, o2, o3, o4, o5, g2, g3, g4, g5)
- MOVE_BIGALIGNCHUNK(o1, o0, 0x40, o2, o3, o4, o5, g2, g3, g4, g5)
- MOVE_BIGALIGNCHUNK(o1, o0, 0x60, o2, o3, o4, o5, g2, g3, g4, g5)
- subcc %g1, 128, %g1
- add %o1, 128, %o1
- cmp %g1, 128
- bge 82b
- add %o0, 128, %o0
- andcc %g1, 0x70, %g4
- be 84f
- andcc %g1, 8, %g0
- sethi %hi(84f), %o5
- add %o1, %g4, %o1
- sub %o5, %g4, %o5
- jmpl %o5 + %lo(84f), %g0
- add %o0, %g4, %o0
- 83: /* amemcpy_table */
- MOVE_LASTALIGNCHUNK(o1, o0, 0x60, g2, g3, g4, g5)
- MOVE_LASTALIGNCHUNK(o1, o0, 0x50, g2, g3, g4, g5)
- MOVE_LASTALIGNCHUNK(o1, o0, 0x40, g2, g3, g4, g5)
- MOVE_LASTALIGNCHUNK(o1, o0, 0x30, g2, g3, g4, g5)
- MOVE_LASTALIGNCHUNK(o1, o0, 0x20, g2, g3, g4, g5)
- MOVE_LASTALIGNCHUNK(o1, o0, 0x10, g2, g3, g4, g5)
- MOVE_LASTALIGNCHUNK(o1, o0, 0x00, g2, g3, g4, g5)
- 84: /* amemcpy_table_end */
- be 85f
- andcc %g1, 4, %g0
- ldd [%o1], %g2
- add %o0, 8, %o0
- std %g2, [%o0 - 0x08]
- add %o1, 8, %o1
- 85: /* amemcpy_last7 */
- be 1f
- andcc %g1, 2, %g0
- ld [%o1], %g2
- add %o1, 4, %o1
- st %g2, [%o0]
- add %o0, 4, %o0
- 1:
- be 1f
- andcc %g1, 1, %g0
- lduh [%o1], %g2
- add %o1, 2, %o1
- sth %g2, [%o0]
- add %o0, 2, %o0
- 1:
- be 1f
- nop
- ldub [%o1], %g2
- stb %g2, [%o0]
- 1:
- retl
- mov %g7, %o0
- 86: /* non_aligned */
- cmp %o2, 6
- bleu 88f
- nop
- save %sp, -96, %sp
- andcc %i0, 3, %g0
- be 61f
- andcc %i0, 1, %g0
- be 60f
- andcc %i0, 2, %g0
- ldub [%i1], %g5
- add %i1, 1, %i1
- stb %g5, [%i0]
- sub %i2, 1, %i2
- bne 61f
- add %i0, 1, %i0
- 60:
- ldub [%i1], %g3
- add %i1, 2, %i1
- stb %g3, [%i0]
- sub %i2, 2, %i2
- ldub [%i1 - 1], %g3
- add %i0, 2, %i0
- stb %g3, [%i0 - 1]
- 61:
- and %i1, 3, %g2
- and %i2, 0xc, %g3
- and %i1, -4, %i1
- cmp %g3, 4
- sll %g2, 3, %g4
- mov 32, %g2
- be 4f
- sub %g2, %g4, %l0
-
- blu 3f
- cmp %g3, 0x8
- be 2f
- srl %i2, 2, %g3
- ld [%i1], %i3
- add %i0, -8, %i0
- ld [%i1 + 4], %i4
- b 8f
- add %g3, 1, %g3
- 2:
- ld [%i1], %i4
- add %i0, -12, %i0
- ld [%i1 + 4], %i5
- add %g3, 2, %g3
- b 9f
- add %i1, -4, %i1
- 3:
- ld [%i1], %g1
- add %i0, -4, %i0
- ld [%i1 + 4], %i3
- srl %i2, 2, %g3
- b 7f
- add %i1, 4, %i1
- 4:
- ld [%i1], %i5
- cmp %i2, 7
- ld [%i1 + 4], %g1
- srl %i2, 2, %g3
- bleu 10f
- add %i1, 8, %i1
- ld [%i1], %i3
- add %g3, -1, %g3
- 5:
- sll %i5, %g4, %g2
- srl %g1, %l0, %g5
- or %g2, %g5, %g2
- st %g2, [%i0]
- 7:
- ld [%i1 + 4], %i4
- sll %g1, %g4, %g2
- srl %i3, %l0, %g5
- or %g2, %g5, %g2
- st %g2, [%i0 + 4]
- 8:
- ld [%i1 + 8], %i5
- sll %i3, %g4, %g2
- srl %i4, %l0, %g5
- or %g2, %g5, %g2
- st %g2, [%i0 + 8]
- 9:
- ld [%i1 + 12], %g1
- sll %i4, %g4, %g2
- srl %i5, %l0, %g5
- addcc %g3, -4, %g3
- or %g2, %g5, %g2
- add %i1, 16, %i1
- st %g2, [%i0 + 12]
- add %i0, 16, %i0
- bne,a 5b
- ld [%i1], %i3
- 10:
- sll %i5, %g4, %g2
- srl %g1, %l0, %g5
- srl %l0, 3, %g3
- or %g2, %g5, %g2
- sub %i1, %g3, %i1
- andcc %i2, 2, %g0
- st %g2, [%i0]
- be 1f
- andcc %i2, 1, %g0
- ldub [%i1], %g2
- add %i1, 2, %i1
- stb %g2, [%i0 + 4]
- add %i0, 2, %i0
- ldub [%i1 - 1], %g2
- stb %g2, [%i0 + 3]
- 1:
- be 1f
- nop
- ldub [%i1], %g2
- stb %g2, [%i0 + 4]
- 1:
- ret
- restore %g7, %g0, %o0
- 88: /* short_end */
- and %o2, 0xe, %o3
- 20:
- sethi %hi(89f), %o5
- sll %o3, 3, %o4
- add %o0, %o3, %o0
- sub %o5, %o4, %o5
- add %o1, %o3, %o1
- jmpl %o5 + %lo(89f), %g0
- andcc %o2, 1, %g0
- MOVE_SHORTCHUNK(o1, o0, 0x0c, g2, g3)
- MOVE_SHORTCHUNK(o1, o0, 0x0a, g2, g3)
- MOVE_SHORTCHUNK(o1, o0, 0x08, g2, g3)
- MOVE_SHORTCHUNK(o1, o0, 0x06, g2, g3)
- MOVE_SHORTCHUNK(o1, o0, 0x04, g2, g3)
- MOVE_SHORTCHUNK(o1, o0, 0x02, g2, g3)
- MOVE_SHORTCHUNK(o1, o0, 0x00, g2, g3)
- 89: /* short_table_end */
- be 1f
- nop
- ldub [%o1], %g2
- stb %g2, [%o0]
- 1:
- retl
- mov %g7, %o0
- 90: /* short_aligned_end */
- bne 88b
- andcc %o2, 8, %g0
- be 1f
- andcc %o2, 4, %g0
- ld [%o1 + 0x00], %g2
- ld [%o1 + 0x04], %g3
- add %o1, 8, %o1
- st %g2, [%o0 + 0x00]
- st %g3, [%o0 + 0x04]
- add %o0, 8, %o0
- 1:
- b 81b
- mov %o2, %g1
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