| /* 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> |
| #include <init-arch.h> |
| |
| |
| /* Define multiple versions only for the definition in lib. */ |
| #ifndef NOT_IN_libc |
| .text |
| ENTRY(rawmemchr) |
| .type rawmemchr, @gnu_indirect_function |
| cmpl $0, __cpu_features+KIND_OFFSET(%rip) |
| jne 1f |
| call __init_cpu_features |
| 1: leaq __rawmemchr_sse2(%rip), %rax |
| testl $bit_SSE4_2, __cpu_features+CPUID_OFFSET+index_SSE4_2(%rip) |
| jz 2f |
| leaq __rawmemchr_sse42(%rip), %rax |
| 2: ret |
| END(rawmemchr) |
| strong_alias (rawmemchr, __rawmemchr) |
| |
| |
| .section .text.sse4.2,"ax",@progbits |
| .align 16 |
| .type __rawmemchr_sse42, @function |
| __rawmemchr_sse42: |
| cfi_startproc |
| CALL_MCOUNT |
| 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 |
| shl %cl, %esi |
| pmovmskb %xmm0, %ecx |
| movl $16, %eax |
| movl $16, %edx |
| andl %esi, %ecx |
| jnz 1f |
| |
| 2: pcmpestri $0x08, 16(%rdi), %xmm1 |
| leaq 16(%rdi), %rdi |
| jnc 2b |
| |
| leaq (%rdi,%rcx), %rax |
| ret |
| |
| 1: bsfl %ecx, %eax |
| addq %rdi, %rax |
| ret |
| cfi_endproc |
| .size __rawmemchr_sse42, .-__rawmemchr_sse42 |
| |
| |
| # undef ENTRY |
| # define ENTRY(name) \ |
| .type __rawmemchr_sse2, @function; \ |
| .align 16; \ |
| __rawmemchr_sse2: cfi_startproc; \ |
| CALL_MCOUNT |
| # undef END |
| # define END(name) \ |
| cfi_endproc; .size __rawmemchr_sse2, .-__rawmemchr_sse2 |
| # undef libc_hidden_builtin_def |
| /* It doesn't make sense to send libc-internal rawmemchr calls through a PLT. |
| The speedup we get from using SSE4.2 instruction is likely eaten away |
| by the indirect call in the PLT. */ |
| # define libc_hidden_builtin_def(name) \ |
| .globl __GI___rawmemchr; __GI___rawmemchr = __rawmemchr_sse2 |
| #endif |
| |
| #include "../rawmemchr.S" |
