diff options
Diffstat (limited to 'sysdeps/sh/memcpy.S')
| -rw-r--r-- | sysdeps/sh/memcpy.S | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/sysdeps/sh/memcpy.S b/sysdeps/sh/memcpy.S new file mode 100644 index 0000000000..18be7dc7f4 --- /dev/null +++ b/sysdeps/sh/memcpy.S @@ -0,0 +1,231 @@ +/* Copyright (C) 1999, 2000 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <sysdep.h> +#include <endian.h> + +/* + * void *memcpy(void *dst, const void *src, size_t n); + * No overlap between the memory of DST and of SRC are assumed. + */ + +ENTRY(memcpy) + tst r6,r6 + bt/s 1f + mov r4,r0 + mov #12,r1 + cmp/gt r6,r1 + bf 2f +0: + mov.b @r5+,r1 + dt r6 + mov.b r1,@r4 + bf/s 0b + add #1,r4 +1: + rts + nop +2: + mov.l r8,@-r15 + mov.l r9,@-r15 + mov r6,r2 + mov.l r10,@-r15 + mov.l r11,@-r15 + mov.l r14,@-r15 + mov r4,r11 + mov r15,r14 + mov r5,r0 + and #1,r0 + tst r0,r0 + bt/s .L42 + mov r5,r0 + mov.b @r5+,r1 + add #-1,r2 + add #1,r4 + mov.b r1,@r11 + mov r5,r0 +.L42: + and #2,r0 + tst r0,r0 + bt/s .L43 + mov r4,r0 + mov.b @r5+,r1 + mov.b r1,@r4 + mov.b @r5+,r1 + add #1,r4 + add #-2,r2 + mov.b r1,@r4 + add #1,r4 + mov r4,r0 +.L43: + and #1,r0 + tst r0,r0 + bf/s .L38 + mov r4,r0 + and #2,r0 + tst r0,r0 + bf/s .L7 + mov r2,r0 + shlr2 r0 + and #3,r0 + cmp/eq #2,r0 + bt/s .L10 + mov #2,r1 + cmp/gt r1,r0 + bt/s .L14 + cmp/eq #3,r0 + cmp/eq #1,r0 + bt/s .L11 + mov r0,r1 + bra .L44 + shll2 r1 + .align 5 +.L14: + bf .L8 + mov.l @(8,r5),r1 + mov.l r1,@(8,r4) +.L10: + mov.l @(4,r5),r1 + mov.l r1,@(4,r4) +.L11: + mov.l @r5,r1 + mov.l r1,@r4 +.L8: + mov r0,r1 + shll2 r1 +.L44: + add r1,r4 + add r1,r5 + mov r2,r0 + mov #-4,r1 + shad r1,r0 + mov #3,r6 + bra .L37 + and r2,r6 + .align 5 +.L18: + mov.l @r5+,r1 + mov.l @r5+,r2 + mov.l @r5+,r3 + mov.l @r5+,r7 + mov.l r1,@r4 + mov.l r2,@(4,r4) + mov.l r3,@(8,r4) + mov.l r7,@(12,r4) + add #16,r4 +.L37: + cmp/pl r0 + bt/s .L18 + add #-1,r0 + mov r6,r2 +.L38: + bra .L40 + mov r2,r0 + .align 5 +.L7: + shar r0 + and #3,r0 + cmp/eq #2,r0 + bt/s .L23 + mov #2,r1 + cmp/gt r1,r0 + bt/s .L27 + cmp/eq #3,r0 + cmp/eq #1,r0 + bt/s .L24 + mov r0,r1 + bra .L45 + add r0,r1 + .align 5 +.L27: + bf .L21 + add #4,r5 + mov.w @r5,r1 + add #4,r4 + mov.w r1,@r4 + add #-4,r5 + add #-4,r4 +.L23: + add #2,r5 + mov.w @r5,r1 + add #2,r4 + mov.w r1,@r4 + add #-2,r5 + add #-2,r4 +.L24: + mov.w @r5,r1 + mov.w r1,@r4 +.L21: + mov r0,r1 + add r0,r1 +.L45: + add r1,r4 + add r1,r5 + mov r2,r0 + mov #-3,r1 + shad r1,r0 + mov #1,r10 + mov r0,r1 + and r2,r10 + cmp/pl r1 + bf/s .L29 + add #-1,r0 + mov r4,r9 + mov r4,r8 + add #4,r9 + mov r4,r6 + add #6,r8 + add #2,r6 +.L31: + mov.w @r5+,r1 + mov.w @r5+,r2 + mov.w @r5+,r3 + mov.w @r5+,r7 + mov.w r1,@r4 + mov.w r2,@r6 + add #8,r4 + mov r0,r1 + add #8,r6 + mov.w r3,@r9 + add #-1,r0 + add #8,r9 + mov.w r7,@r8 + cmp/pl r1 + bt/s .L31 + add #8,r8 +.L29: + mov r10,r2 + mov r2,r0 +.L40: + cmp/pl r0 + bf .L34 +.L35: + mov.b @r5+,r1 + dt r2 + mov.b r1,@r4 + bf/s .L35 + add #1,r4 +.L34: + mov r11,r0 + mov r14,r15 + mov.l @r15+,r14 + mov.l @r15+,r11 + mov.l @r15+,r10 + mov.l @r15+,r9 + rts + mov.l @r15+,r8 |