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64 lines
2.0 KiB
ArmAsm
64 lines
2.0 KiB
ArmAsm
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/* Multiple versions of strspn
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Copyright (C) 2009 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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <config.h>
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#ifdef HAVE_SSE4_SUPPORT
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#include <sysdep.h>
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#include <ifunc-defines.h>
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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(strspn)
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.type strspn, @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 __strspn_sse2(%rip), %rax
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testl $(1<<20), __cpu_features+CPUID_OFFSET+COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET(%rip)
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jz 2f
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leaq __strspn_sse42(%rip), %rax
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2: ret
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END(strspn)
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# undef ENTRY
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# define ENTRY(name) \
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.type __strspn_sse2, @function; \
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.globl __strspn_sse2; \
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.align 16; \
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__strspn_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 __strspn_sse2, .-__strspn_sse2
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# undef libc_hidden_builtin_def
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/* It doesn't make sense to send libc-internal strspn 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_strspn; __GI_strspn = __strspn_sse2
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#endif
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#endif /* HAVE_SSE4_SUPPORT */
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#include "../strspn.S"
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