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99 lines
3.0 KiB
ArmAsm
99 lines
3.0 KiB
ArmAsm
/* Multiple versions of strcpy
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Copyright (C) 2009, 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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#if !defined (USE_AS_STPCPY) && !defined (USE_AS_STRNCPY)
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# ifndef STRCPY
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# define STRCPY strcpy
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# endif
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#endif
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#ifdef USE_AS_STPCPY
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# ifdef USE_AS_STRNCPY
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# define STRCPY_SSSE3 __stpncpy_ssse3
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# define STRCPY_SSE2 __stpncpy_sse2
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# define STRCPY_SSE2_UNALIGNED __stpncpy_sse2_unaligned
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# define __GI_STRCPY __GI_stpncpy
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# define __GI___STRCPY __GI___stpncpy
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# else
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# define STRCPY_SSSE3 __stpcpy_ssse3
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# define STRCPY_SSE2 __stpcpy_sse2
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# define STRCPY_SSE2_UNALIGNED __stpcpy_sse2_unaligned
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# define __GI_STRCPY __GI_stpcpy
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# define __GI___STRCPY __GI___stpcpy
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# endif
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#else
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# ifdef USE_AS_STRNCPY
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# define STRCPY_SSSE3 __strncpy_ssse3
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# define STRCPY_SSE2 __strncpy_sse2
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# define STRCPY_SSE2_UNALIGNED __strncpy_sse2_unaligned
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# define __GI_STRCPY __GI_strncpy
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# else
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# define STRCPY_SSSE3 __strcpy_ssse3
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# define STRCPY_SSE2 __strcpy_sse2
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# define STRCPY_SSE2_UNALIGNED __strcpy_sse2_unaligned
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# define __GI_STRCPY __GI_strcpy
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# endif
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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(STRCPY)
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.type STRCPY, @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 STRCPY_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 STRCPY_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 STRCPY_SSSE3(%rip), %rax
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2: ret
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END(STRCPY)
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# undef ENTRY
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# define ENTRY(name) \
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.type STRCPY_SSE2, @function; \
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.align 16; \
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STRCPY_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 STRCPY_SSE2, .-STRCPY_SSE2
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# undef libc_hidden_builtin_def
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/* It doesn't make sense to send libc-internal strcpy 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_STRCPY; __GI_STRCPY = STRCPY_SSE2
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# undef libc_hidden_def
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# define libc_hidden_def(name) \
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.globl __GI___STRCPY; __GI___STRCPY = STRCPY_SSE2
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#endif
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#ifndef USE_AS_STRNCPY
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#include "../strcpy.S"
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#endif
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