mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-04 02:40:06 +00:00
210 lines
5.7 KiB
ArmAsm
210 lines
5.7 KiB
ArmAsm
/* Multiple versions of strcmp
|
|
Copyright (C) 2009-2016 Free Software Foundation, Inc.
|
|
Contributed by Intel Corporation.
|
|
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, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <sysdep.h>
|
|
#include <init-arch.h>
|
|
|
|
#ifdef USE_AS_STRNCMP
|
|
/* Since the counter, %r11, is unsigned, we branch to strcmp_exitz
|
|
if the new counter > the old one or is 0. */
|
|
# define UPDATE_STRNCMP_COUNTER \
|
|
/* calculate left number to compare */ \
|
|
lea -16(%rcx, %r11), %r9; \
|
|
cmp %r9, %r11; \
|
|
jb LABEL(strcmp_exitz); \
|
|
test %r9, %r9; \
|
|
je LABEL(strcmp_exitz); \
|
|
mov %r9, %r11
|
|
|
|
# define STRCMP_SSE42 __strncmp_sse42
|
|
# define STRCMP_SSSE3 __strncmp_ssse3
|
|
# define STRCMP_SSE2 __strncmp_sse2
|
|
# define __GI_STRCMP __GI_strncmp
|
|
#elif defined USE_AS_STRCASECMP_L
|
|
# include "locale-defines.h"
|
|
|
|
# define UPDATE_STRNCMP_COUNTER
|
|
|
|
# define STRCMP_AVX __strcasecmp_l_avx
|
|
# define STRCMP_SSE42 __strcasecmp_l_sse42
|
|
# define STRCMP_SSSE3 __strcasecmp_l_ssse3
|
|
# define STRCMP_SSE2 __strcasecmp_l_sse2
|
|
# define __GI_STRCMP __GI___strcasecmp_l
|
|
#elif defined USE_AS_STRNCASECMP_L
|
|
# include "locale-defines.h"
|
|
|
|
/* Since the counter, %r11, is unsigned, we branch to strcmp_exitz
|
|
if the new counter > the old one or is 0. */
|
|
# define UPDATE_STRNCMP_COUNTER \
|
|
/* calculate left number to compare */ \
|
|
lea -16(%rcx, %r11), %r9; \
|
|
cmp %r9, %r11; \
|
|
jb LABEL(strcmp_exitz); \
|
|
test %r9, %r9; \
|
|
je LABEL(strcmp_exitz); \
|
|
mov %r9, %r11
|
|
|
|
# define STRCMP_AVX __strncasecmp_l_avx
|
|
# define STRCMP_SSE42 __strncasecmp_l_sse42
|
|
# define STRCMP_SSSE3 __strncasecmp_l_ssse3
|
|
# define STRCMP_SSE2 __strncasecmp_l_sse2
|
|
# define __GI_STRCMP __GI___strncasecmp_l
|
|
#else
|
|
# define USE_AS_STRCMP
|
|
# define UPDATE_STRNCMP_COUNTER
|
|
# ifndef STRCMP
|
|
# define STRCMP strcmp
|
|
# define STRCMP_SSE42 __strcmp_sse42
|
|
# define STRCMP_SSSE3 __strcmp_ssse3
|
|
# define STRCMP_SSE2 __strcmp_sse2
|
|
# define __GI_STRCMP __GI_strcmp
|
|
# endif
|
|
#endif
|
|
|
|
/* Define multiple versions only for the definition in libc. Don't
|
|
define multiple versions for strncmp in static library since we
|
|
need strncmp before the initialization happened. */
|
|
#if (defined SHARED || !defined USE_AS_STRNCMP) && IS_IN (libc)
|
|
.text
|
|
ENTRY(STRCMP)
|
|
.type STRCMP, @gnu_indirect_function
|
|
LOAD_RTLD_GLOBAL_RO_RDX
|
|
#ifdef USE_AS_STRCMP
|
|
leaq __strcmp_sse2_unaligned(%rip), %rax
|
|
HAS_ARCH_FEATURE (Fast_Unaligned_Load)
|
|
jnz 3f
|
|
#else
|
|
HAS_ARCH_FEATURE (Slow_SSE4_2)
|
|
jnz 2f
|
|
leaq STRCMP_SSE42(%rip), %rax
|
|
HAS_CPU_FEATURE (SSE4_2)
|
|
jnz 3f
|
|
#endif
|
|
2: leaq STRCMP_SSSE3(%rip), %rax
|
|
HAS_CPU_FEATURE (SSSE3)
|
|
jnz 3f
|
|
leaq STRCMP_SSE2(%rip), %rax
|
|
3: ret
|
|
END(STRCMP)
|
|
|
|
# ifdef USE_AS_STRCASECMP_L
|
|
ENTRY(__strcasecmp)
|
|
.type __strcasecmp, @gnu_indirect_function
|
|
LOAD_RTLD_GLOBAL_RO_RDX
|
|
leaq __strcasecmp_avx(%rip), %rax
|
|
HAS_ARCH_FEATURE (AVX_Usable)
|
|
jnz 3f
|
|
HAS_ARCH_FEATURE (Slow_SSE4_2)
|
|
jnz 2f
|
|
leaq __strcasecmp_sse42(%rip), %rax
|
|
HAS_CPU_FEATURE (SSE4_2)
|
|
jnz 3f
|
|
2: leaq __strcasecmp_ssse3(%rip), %rax
|
|
HAS_CPU_FEATURE (SSSE3)
|
|
jnz 3f
|
|
leaq __strcasecmp_sse2(%rip), %rax
|
|
3: ret
|
|
END(__strcasecmp)
|
|
weak_alias (__strcasecmp, strcasecmp)
|
|
# endif
|
|
# ifdef USE_AS_STRNCASECMP_L
|
|
ENTRY(__strncasecmp)
|
|
.type __strncasecmp, @gnu_indirect_function
|
|
LOAD_RTLD_GLOBAL_RO_RDX
|
|
leaq __strncasecmp_avx(%rip), %rax
|
|
HAS_ARCH_FEATURE (AVX_Usable)
|
|
jnz 3f
|
|
HAS_ARCH_FEATURE (Slow_SSE4_2)
|
|
jnz 2f
|
|
leaq __strncasecmp_sse42(%rip), %rax
|
|
HAS_CPU_FEATURE (SSE4_2)
|
|
jnz 3f
|
|
2: leaq __strncasecmp_ssse3(%rip), %rax
|
|
HAS_CPU_FEATURE (SSSE3)
|
|
jnz 3f
|
|
leaq __strncasecmp_sse2(%rip), %rax
|
|
3: ret
|
|
END(__strncasecmp)
|
|
weak_alias (__strncasecmp, strncasecmp)
|
|
# endif
|
|
|
|
# undef LABEL
|
|
# define LABEL(l) .L##l##_sse42
|
|
# define GLABEL(l) l##_sse42
|
|
# define SECTION sse4.2
|
|
# include "strcmp-sse42.S"
|
|
|
|
|
|
# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
|
|
# define LABEL(l) .L##l##_avx
|
|
# define GLABEL(l) l##_avx
|
|
# define USE_AVX 1
|
|
# undef STRCMP_SSE42
|
|
# define STRCMP_SSE42 STRCMP_AVX
|
|
# define SECTION avx
|
|
# include "strcmp-sse42.S"
|
|
# endif
|
|
|
|
|
|
# undef ENTRY
|
|
# define ENTRY(name) \
|
|
.type STRCMP_SSE2, @function; \
|
|
.align 16; \
|
|
.globl STRCMP_SSE2; \
|
|
.hidden STRCMP_SSE2; \
|
|
STRCMP_SSE2: cfi_startproc; \
|
|
CALL_MCOUNT
|
|
# undef END
|
|
# define END(name) \
|
|
cfi_endproc; .size STRCMP_SSE2, .-STRCMP_SSE2
|
|
|
|
# ifdef USE_AS_STRCASECMP_L
|
|
# define ENTRY2(name) \
|
|
.type __strcasecmp_sse2, @function; \
|
|
.align 16; \
|
|
.globl __strcasecmp_sse2; \
|
|
.hidden __strcasecmp_sse2; \
|
|
__strcasecmp_sse2: cfi_startproc; \
|
|
CALL_MCOUNT
|
|
# define END2(name) \
|
|
cfi_endproc; .size __strcasecmp_sse2, .-__strcasecmp_sse2
|
|
# endif
|
|
|
|
# ifdef USE_AS_STRNCASECMP_L
|
|
# define ENTRY2(name) \
|
|
.type __strncasecmp_sse2, @function; \
|
|
.align 16; \
|
|
.globl __strncasecmp_sse2; \
|
|
.hidden __strncasecmp_sse2; \
|
|
__strncasecmp_sse2: cfi_startproc; \
|
|
CALL_MCOUNT
|
|
# define END2(name) \
|
|
cfi_endproc; .size __strncasecmp_sse2, .-__strncasecmp_sse2
|
|
# endif
|
|
|
|
# undef libc_hidden_builtin_def
|
|
/* It doesn't make sense to send libc-internal strcmp 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_STRCMP; __GI_STRCMP = STRCMP_SSE2
|
|
#endif
|
|
|
|
#include "../strcmp.S"
|