| /* 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 |
| testq %rdx, %rdx |
| punpcklbw %xmm1, %xmm1 |
| jz 3f |
| 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 $16, %esi |
| jnz 1f |
| cmpq %rsi, %rdx |
| jbe 3f |
| |
| 2: movdqa (%rdi,%rsi), %xmm0 |
| leaq 16(%rsi), %rsi |
| pcmpeqb %xmm1, %xmm0 |
| pmovmskb %xmm0, %ecx |
| testl %ecx, %ecx |
| jnz 1f |
| cmpq %rsi, %rdx |
| ja 2b |
| |
| 3: xorl %eax, %eax |
| ret |
| |
| 1: leaq -16(%rdi,%rsi), %rax |
| bsfl %ecx, %ecx |
| addq %rcx, %rax |
| leaq -16(%rsi,%rcx), %rsi |
| cmpq %rsi, %rdx |
| jbe 3b |
| ret |
| END (memchr) |
| |
| strong_alias (memchr, __memchr) |
| libc_hidden_builtin_def (memchr) |
