diff options
Diffstat (limited to 'contrib/syslinux/syslinux-4.03/com32/lib/memmove.S')
| -rw-r--r-- | contrib/syslinux/syslinux-4.03/com32/lib/memmove.S | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/contrib/syslinux/syslinux-4.03/com32/lib/memmove.S b/contrib/syslinux/syslinux-4.03/com32/lib/memmove.S deleted file mode 100644 index e97299f..0000000 --- a/contrib/syslinux/syslinux-4.03/com32/lib/memmove.S +++ /dev/null @@ -1,146 +0,0 @@ -/* ----------------------------------------------------------------------- * - * - * Copyright 2008 H. Peter Anvin - All Rights Reserved - * Copyright 2010 Intel Corporation; author: H. Peter Anvin - * - * Permission is hereby granted, free of charge, to any person - * obtaining a copy of this software and associated documentation - * files (the "Software"), to deal in the Software without - * restriction, including without limitation the rights to use, - * copy, modify, merge, publish, distribute, sublicense, and/or - * sell copies of the Software, and to permit persons to whom - * the Software is furnished to do so, subject to the following - * conditions: - * - * The above copyright notice and this permission notice shall - * be included in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES - * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT - * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, - * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING - * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR - * OTHER DEALINGS IN THE SOFTWARE. - * - * ----------------------------------------------------------------------- */ - -/* - * memmove.S - * - * Reasonably efficient memmove, using aligned transfers at least - * for the destination operand. - */ - - .globl memmove - .type memmove,@function - .text -memmove: - jecxz 4f - - pushl %esi - pushl %edi - pushl %eax /* Return value */ - - movl %eax,%edi - movl %edx,%esi - - cmpl %edi,%esi - jb 2f - - /* source >= dest, forwards move */ - - /* Initial alignment */ -1: - movl %edi,%edx - shrl $1,%edx - jnc 11f - movsb - decl %ecx -11: - movb %cl,%al - cmpl $2,%ecx - jb 13f - - shrl $1,%edx - jnc 12f - movsw - subl $2,%ecx -12: - /* Bulk transfer */ - movb %cl,%al - shrl $2,%ecx - rep; movsl - - /* Final alignment */ - testb $2,%al - jz 14f - movsw -13: -14: - testb $1,%al - jz 15f - movsb -15: - /* Common exit stub */ -3: - popl %eax /* Return value */ - popl %edi - popl %esi -4: - ret - - -2: - /* source < dest, backwards move if overlap */ - leal -1(%ecx,%esi),%eax - cmpl %eax,%edi - ja 1b /* No overlap, after all... */ - - std - leal -1(%ecx,%edi),%edi - movl %eax,%esi - - /* Initial alignment */ - movl %edi,%edx - shrl $1,%edx - jc 21f - movsb - decl %ecx -21: - decl %esi - decl %edi - movb %cl,%al - cmpl $2,%ecx - jb 23f - shrl $1,%edx - jc 22f - movsw - subl $2,%ecx -22: - /* Bulk transfer */ - subl $2,%esi - subl $2,%edi - movb %cl,%al - shrl $2,%ecx - rep; movsl - - /* Final alignment */ - addl $2,%esi - addl $2,%edi - testb $2,%al - jz 24f - movsw -23: -24: - incl %esi - incl %edi - testb $1,%al - jz 25f - movsb -25: - cld - jmp 3b - - .size memmove, .-memmove |