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88 lines
2.8 KiB
ArmAsm
88 lines
2.8 KiB
ArmAsm
/* Multiple versions of strcat
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All versions must be listed in ifunc-impl-list.c.
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Copyright (C) 2009-2014 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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#ifndef USE_AS_STRNCAT
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# ifndef STRCAT
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# define STRCAT strcat
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# endif
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#endif
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#ifdef USE_AS_STRNCAT
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# define STRCAT_SSSE3 __strncat_ssse3
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# define STRCAT_SSE2 __strncat_sse2
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# define STRCAT_SSE2_UNALIGNED __strncat_sse2_unaligned
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# define __GI_STRCAT __GI_strncat
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# define __GI___STRCAT __GI___strncat
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#else
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# define STRCAT_SSSE3 __strcat_ssse3
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# define STRCAT_SSE2 __strcat_sse2
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# define STRCAT_SSE2_UNALIGNED __strcat_sse2_unaligned
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# define __GI_STRCAT __GI_strcat
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# define __GI___STRCAT __GI___strcat
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#endif
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/* Define multiple versions only for the definition in libc. */
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#ifndef NOT_IN_libc
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.text
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ENTRY(STRCAT)
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.type STRCAT, @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: leaq STRCAT_SSE2_UNALIGNED(%rip), %rax
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testl $bit_Fast_Unaligned_Load, __cpu_features+FEATURE_OFFSET+index_Fast_Unaligned_Load(%rip)
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jnz 2f
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leaq STRCAT_SSE2(%rip), %rax
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testl $bit_SSSE3, __cpu_features+CPUID_OFFSET+index_SSSE3(%rip)
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jz 2f
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leaq STRCAT_SSSE3(%rip), %rax
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2: ret
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END(STRCAT)
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# undef ENTRY
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# define ENTRY(name) \
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.type STRCAT_SSE2, @function; \
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.align 16; \
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.globl STRCAT_SSE2; \
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.hidden STRCAT_SSE2; \
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STRCAT_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 STRCAT_SSE2, .-STRCAT_SSE2
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# undef libc_hidden_builtin_def
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/* It doesn't make sense to send libc-internal strcat calls through a PLT.
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The speedup we get from using SSSE3 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_STRCAT; __GI_STRCAT = STRCAT_SSE2
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# undef libc_hidden_def
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# define libc_hidden_def(name) \
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.globl __GI___STRCAT; __GI___STRCAT = STRCAT_SSE2
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#endif
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#ifndef USE_AS_STRNCAT
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# include "../strcat.S"
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#endif
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