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* sysdeps/x86_64/memchr.S: New file.

This commit is contained in:
Ulrich Drepper 2009-04-07 06:36:33 +00:00
parent ae06191038
commit 322e23db24
4 changed files with 2066 additions and 1862 deletions
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2
ChangeLog
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2009-04-06 Ulrich Drepper <drepper@redhat.com> 2009-04-06 Ulrich Drepper <drepper@redhat.com>
* sysdeps/x86_64/memchr.S: New file.
* resolv/resolv.h (RES_SNGLKUP): Define. * resolv/resolv.h (RES_SNGLKUP): Define.
* resolv/res_init.c (res_setoptions): Recognize single-request option. * resolv/res_init.c (res_setoptions): Recognize single-request option.
* resolv/res_send.c (send_dg): If we sent two requests at once and * resolv/res_send.c (send_dg): If we sent two requests at once and

3704
configure vendored
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67
sysdeps/x86_64/memchr.S Normal file
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/* strlen(str) -- determine the length of the string STR.
Copyright (C) 2009 Free Software Foundation, Inc.
Contributed by Ulrich Drepper <drepper@redhat.com>.
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 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep.h>
.text
ENTRY (memchr)
movd %esi, %xmm1
movq %rdi, %rcx
punpcklbw %xmm1, %xmm1
andq $~15, %rdi
punpcklbw %xmm1, %xmm1
orl $0xffffffff, %esi
movdqa (%rdi), %xmm0
pshufd $0, %xmm1, %xmm1
subq %rdi, %rcx
pcmpeqb %xmm1, %xmm0
addq %rcx, %rdx
shl %cl, %esi
pmovmskb %xmm0, %ecx
andl %esi, %ecx
movl $0, %esi
jnz 1f
cmpq %rsi, %rdx
jle 3f
2: movdqa 16(%rdi,%rsi), %xmm0
leaq 16(%rsi), %rsi
pcmpeqb %xmm1, %xmm0
pmovmskb %xmm0, %ecx
testl %ecx, %ecx
jnz 1f
cmpq %rsi, %rdx
jg 2b
3: xorl %eax, %eax
ret
1: leaq (%rdi,%rsi), %rax
bsfl %ecx, %ecx
addq %rcx, %rax
addq %rcx, %rsi
cmpq %rsi, %rdx
jle 3b
ret
END (memchr)
strong_alias (memchr, __memchr)
libc_hidden_builtin_def (memchr)

1
sysdeps/x86_64/strlen.S
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#include <sysdep.h> #include <sysdep.h>
.text
ENTRY(strlen) ENTRY(strlen)
movq %rdi, %rcx movq %rdi, %rcx
movq %rdi, %r8 movq %rdi, %r8