1
/* strlen with SSE2 and BSF
2
Copyright (C) 2010 Free Software Foundation, Inc.
3
Contributed by Intel Corporation.
4
This file is part of the GNU C Library.
6
The GNU C Library is free software; you can redistribute it and/or
7
modify it under the terms of the GNU Lesser General Public
8
License as published by the Free Software Foundation; either
9
version 2.1 of the License, or (at your option) any later version.
11
The GNU C Library is distributed in the hope that it will be useful,
12
but WITHOUT ANY WARRANTY; without even the implied warranty of
13
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14
Lesser General Public License for more details.
16
You should have received a copy of the GNU Lesser General Public
17
License along with the GNU C Library; if not, write to the Free
18
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21
#if defined SHARED && !defined NOT_IN_libc
24
#include "asm-syntax.h"
26
#define CFI_PUSH(REG) \
27
cfi_adjust_cfa_offset (4); \
28
cfi_rel_offset (REG, 0)
30
#define CFI_POP(REG) \
31
cfi_adjust_cfa_offset (-4); \
34
#define PUSH(REG) pushl REG; CFI_PUSH (REG)
35
#define POP(REG) popl REG; CFI_POP (REG)
36
#define PARMS 4 + 8 /* Preserve ESI and EDI. */
38
#define ENTRANCE PUSH (%esi); PUSH (%edi); cfi_remember_state
39
#define RETURN POP (%edi); POP (%esi); ret; \
40
cfi_restore_state; cfi_remember_state
43
ENTRY ( __strlen_sse2_bsf)
78
pcmpeqb 16(%eax), %xmm0
83
pcmpeqb 32(%eax), %xmm1
88
pcmpeqb 48(%eax), %xmm2
93
pcmpeqb 64(%eax), %xmm3
125
END ( __strlen_sse2_bsf)