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Diffstat (limited to 'sysdeps/sh/memcpy.S')
| -rw-r--r-- | sysdeps/sh/memcpy.S | 198 |
1 files changed, 0 insertions, 198 deletions
diff --git a/sysdeps/sh/memcpy.S b/sysdeps/sh/memcpy.S deleted file mode 100644 index c13afeaf24..0000000000 --- a/sysdeps/sh/memcpy.S +++ /dev/null @@ -1,198 +0,0 @@ -/* Copyright (C) 1999-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Kazumoto Kojima <kkojima@rr.iij4u.or.jp> - Optimized by Toshiyasu Morita <toshiyasu.morita@hsa.hitachi.com> - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#include <sysdep.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) - mov r4,r3 /* Save destination. */ - - /* If less than 11 bytes, just do a byte copy. */ - mov #11,r0 - cmp/gt r6,r0 - bt L_byteloop_init - - /* Check if we need to word-align source. */ - mov r5,r0 - tst #1,r0 - bt L_wordalign - - mov.b @r0+,r1 /* Copy one byte. */ - add #-1,r6 - mov.b r1,@r4 - add #1,r4 - - .balignw 4,0x0009 -L_wordalign: - /* Check if we need to longword-align source. */ - tst #2,r0 - bt L_copy - - mov.w @r0+,r1 /* Copy one word. */ - add #-2,r6 -#ifdef __BIG_ENDIAN__ - add #1,r4 - mov.b r1,@r4 - shlr8 r1 - mov.b r1,@-r4 - add #2,r4 -#else - mov.b r1,@r4 - add #1,r4 - shlr8 r1 - mov.b r1,@r4 - add #1,r4 -#endif -L_copy: - mov r0,r5 - - /* Calculate the correct routine to handle the destination - alignment and simultaneously calculate the loop counts for - both the 2 word copy loop and byte copy loop. */ - mova L_jumptable,r0 - mov r0,r1 - mov r4,r0 - mov r6,r7 - and #3,r0 - shlr2 r7 - shll r0 - shlr r7 - mov.w @(r0,r1),r2 - mov #7,r0 - braf r2 - and r0,r6 -L_base: - - .balign 4 -L_jumptable: - .word L_copydest0 - L_base - .word L_copydest1_or_3 - L_base - .word L_copydest2 - L_base - .word L_copydest1_or_3 - L_base - - .balign 4 - /* Copy routine for (dest mod 4) == 1 or == 3. */ -L_copydest1_or_3: - add #-1,r4 - .balignw 4,0x0009 -L_copydest1_or_3_loop: - mov.l @r5+,r0 /* Read first longword. */ - dt r7 - mov.l @r5+,r1 /* Read second longword. */ -#ifdef __BIG_ENDIAN__ - /* Write first longword as byte, word, byte. */ - mov.b r0,@(4,r4) - shlr8 r0 - mov.w r0,@(2,r4) - shlr16 r0 - mov.b r0,@(1,r4) - mov r1,r0 - /* Write second longword as byte, word, byte. */ - mov.b r0,@(8,r4) - shlr8 r0 - mov.w r0,@(6,r4) - shlr16 r0 - mov.b r0,@(5,r4) -#else - /* Write first longword as byte, word, byte. */ - mov.b r0,@(1,r4) - shlr8 r0 - mov.w r0,@(2,r4) - shlr16 r0 - mov.b r0,@(4,r4) - mov r1,r0 - /* Write second longword as byte, word, byte. */ - mov.b r0,@(5,r4) - shlr8 r0 - mov.w r0,@(6,r4) - shlr16 r0 - mov.b r0,@(8,r4) -#endif - bf/s L_copydest1_or_3_loop - add #8,r4 - - bra L_byteloop_init - add #1,r4 - - .balign 4 - /* Copy routine for (dest mod 4) == 2. */ -L_copydest2: -L_copydest2_loop: - mov.l @r5+,r0 - dt r7 - mov.l @r5+,r1 -#ifdef __BIG_ENDIAN__ - mov.w r0,@(2,r4) - shlr16 r0 - mov.w r0,@r4 - mov r1,r0 - mov.w r0,@(6,r4) - shlr16 r0 - mov.w r0,@(4,r4) -#else - mov.w r0,@r4 - shlr16 r0 - mov.w r0,@(2,r4) - mov r1,r0 - mov.w r0,@(4,r4) - shlr16 r0 - mov.w r0,@(6,r4) -#endif - bf/s L_copydest2_loop - add #8,r4 - - bra L_byteloop_init - nop - - .balign 4 - /* Copy routine for (dest mod 4) == 0. */ -L_copydest0: - add #-8,r4 - .balignw 4,0x0009 -L_copydest0_loop: - mov.l @r5+,r0 - dt r7 - mov.l @r5+,r1 - add #8,r4 - mov.l r0,@r4 - bf/s L_copydest0_loop - mov.l r1,@(4,r4) - - add #8,r4 /* Fall through. */ - -L_byteloop_init: - tst r6,r6 - bt L_exit - - .balignw 4,0x0009 - /* Copy remaining bytes. */ -L_byteloop: - mov.b @r5+,r0 - dt r6 - mov.b r0,@r4 - bf/s L_byteloop - add #1,r4 - -L_exit: - rts - mov r3,r0 /* Return destination. */ -END(memcpy) -libc_hidden_builtin_def (memcpy) |