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206 lines
5.9 KiB
ArmAsm
206 lines
5.9 KiB
ArmAsm
/* strcmp with SSE4.2
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Copyright (C) 2009, 2010, 2011 Free Software Foundation, Inc.
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Contributed by Intel Corporation.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include <init-arch.h>
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#ifdef USE_AS_STRNCMP
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/* Since the counter, %r11, is unsigned, we branch to strcmp_exitz
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if the new counter > the old one or is 0. */
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# define UPDATE_STRNCMP_COUNTER \
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/* calculate left number to compare */ \
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lea -16(%rcx, %r11), %r9; \
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cmp %r9, %r11; \
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jb LABEL(strcmp_exitz); \
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test %r9, %r9; \
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je LABEL(strcmp_exitz); \
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mov %r9, %r11
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# define STRCMP_SSE42 __strncmp_sse42
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# define STRCMP_SSSE3 __strncmp_ssse3
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# define STRCMP_SSE2 __strncmp_sse2
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# define __GI_STRCMP __GI_strncmp
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#elif defined USE_AS_STRCASECMP_L
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# include "locale-defines.h"
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# define UPDATE_STRNCMP_COUNTER
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# define STRCMP_AVX __strcasecmp_l_avx
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# define STRCMP_SSE42 __strcasecmp_l_sse42
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# define STRCMP_SSSE3 __strcasecmp_l_ssse3
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# define STRCMP_SSE2 __strcasecmp_l_sse2
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# define __GI_STRCMP __GI___strcasecmp_l
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#elif defined USE_AS_STRNCASECMP_L
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# include "locale-defines.h"
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/* Since the counter, %r11, is unsigned, we branch to strcmp_exitz
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if the new counter > the old one or is 0. */
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# define UPDATE_STRNCMP_COUNTER \
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/* calculate left number to compare */ \
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lea -16(%rcx, %r11), %r9; \
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cmp %r9, %r11; \
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jb LABEL(strcmp_exitz); \
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test %r9, %r9; \
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je LABEL(strcmp_exitz); \
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mov %r9, %r11
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# define STRCMP_AVX __strncasecmp_l_avx
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# define STRCMP_SSE42 __strncasecmp_l_sse42
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# define STRCMP_SSSE3 __strncasecmp_l_ssse3
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# define STRCMP_SSE2 __strncasecmp_l_sse2
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# define __GI_STRCMP __GI___strncasecmp_l
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#else
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# define UPDATE_STRNCMP_COUNTER
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# ifndef STRCMP
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# define STRCMP strcmp
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# define STRCMP_SSE42 __strcmp_sse42
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# define STRCMP_SSSE3 __strcmp_ssse3
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# define STRCMP_SSE2 __strcmp_sse2
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# define __GI_STRCMP __GI_strcmp
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# endif
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#endif
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/* Define multiple versions only for the definition in libc. Don't
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define multiple versions for strncmp in static library since we
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need strncmp before the initialization happened. */
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#if (defined SHARED || !defined USE_AS_STRNCMP) && !defined NOT_IN_libc
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.text
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ENTRY(STRCMP)
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.type STRCMP, @gnu_indirect_function
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cmpl $0, __cpu_features+KIND_OFFSET(%rip)
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jne 1f
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call __init_cpu_features
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1:
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leaq STRCMP_SSE42(%rip), %rax
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testl $bit_SSE4_2, __cpu_features+CPUID_OFFSET+index_SSE4_2(%rip)
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jnz 2f
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leaq STRCMP_SSSE3(%rip), %rax
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testl $bit_SSSE3, __cpu_features+CPUID_OFFSET+index_SSSE3(%rip)
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jnz 2f
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leaq STRCMP_SSE2(%rip), %rax
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2: ret
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END(STRCMP)
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# ifdef USE_AS_STRCASECMP_L
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ENTRY(__strcasecmp)
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.type __strcasecmp, @gnu_indirect_function
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cmpl $0, __cpu_features+KIND_OFFSET(%rip)
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jne 1f
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call __init_cpu_features
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1:
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# ifdef HAVE_AVX_SUPPORT
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leaq __strcasecmp_avx(%rip), %rax
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testl $bit_AVX, __cpu_features+CPUID_OFFSET+index_AVX(%rip)
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jnz 2f
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# endif
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leaq __strcasecmp_sse42(%rip), %rax
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testl $bit_SSE4_2, __cpu_features+CPUID_OFFSET+index_SSE4_2(%rip)
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jnz 2f
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leaq __strcasecmp_ssse3(%rip), %rax
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testl $bit_SSSE3, __cpu_features+CPUID_OFFSET+index_SSSE3(%rip)
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jnz 2f
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leaq __strcasecmp_sse2(%rip), %rax
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2: ret
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END(__strcasecmp)
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weak_alias (__strcasecmp, strcasecmp)
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# endif
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# ifdef USE_AS_STRNCASECMP_L
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ENTRY(__strncasecmp)
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.type __strncasecmp, @gnu_indirect_function
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cmpl $0, __cpu_features+KIND_OFFSET(%rip)
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jne 1f
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call __init_cpu_features
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1:
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# ifdef HAVE_AVX_SUPPORT
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leaq __strncasecmp_avx(%rip), %rax
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testl $bit_AVX, __cpu_features+CPUID_OFFSET+index_AVX(%rip)
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jnz 2f
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# endif
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leaq __strncasecmp_sse42(%rip), %rax
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testl $bit_SSE4_2, __cpu_features+CPUID_OFFSET+index_SSE4_2(%rip)
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jnz 2f
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leaq __strncasecmp_ssse3(%rip), %rax
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testl $bit_SSSE3, __cpu_features+CPUID_OFFSET+index_SSSE3(%rip)
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jnz 2f
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leaq __strncasecmp_sse2(%rip), %rax
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2: ret
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END(__strncasecmp)
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weak_alias (__strncasecmp, strncasecmp)
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# endif
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# undef LABEL
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# define LABEL(l) .L##l##_sse42
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# define GLABEL(l) l##_sse42
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# define SECTION sse4.2
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# include "strcmp-sse42.S"
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# ifdef HAVE_AVX_SUPPORT
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# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
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# define LABEL(l) .L##l##_avx
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# define GLABEL(l) l##_avx
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# define USE_AVX 1
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# undef STRCMP_SSE42
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# define STRCMP_SSE42 STRCMP_AVX
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# define SECTION avx
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# include "strcmp-sse42.S"
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# endif
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# endif
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# undef ENTRY
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# define ENTRY(name) \
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.type STRCMP_SSE2, @function; \
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.align 16; \
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STRCMP_SSE2: cfi_startproc; \
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CALL_MCOUNT
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# undef END
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# define END(name) \
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cfi_endproc; .size STRCMP_SSE2, .-STRCMP_SSE2
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# ifdef USE_AS_STRCASECMP_L
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# define ENTRY2(name) \
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.type __strcasecmp_sse2, @function; \
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.align 16; \
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__strcasecmp_sse2: cfi_startproc; \
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CALL_MCOUNT
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# define END2(name) \
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cfi_endproc; .size __strcasecmp_sse2, .-__strcasecmp_sse2
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# endif
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# ifdef USE_AS_STRNCASECMP_L
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# define ENTRY2(name) \
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.type __strncasecmp_sse2, @function; \
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.align 16; \
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__strncasecmp_sse2: cfi_startproc; \
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CALL_MCOUNT
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# define END2(name) \
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cfi_endproc; .size __strncasecmp_sse2, .-__strncasecmp_sse2
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# endif
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# undef libc_hidden_builtin_def
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/* It doesn't make sense to send libc-internal strcmp calls through a PLT.
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The speedup we get from using SSE4.2 instruction is likely eaten away
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by the indirect call in the PLT. */
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# define libc_hidden_builtin_def(name) \
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.globl __GI_STRCMP; __GI_STRCMP = STRCMP_SSE2
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#endif
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#include "../strcmp.S"
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