2009-07-03 09:48:56 +00:00
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/* Multiple versions of strcspn
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2012-10-10 14:49:12 +00:00
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All versions must be listed in ifunc-impl-list.c.
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Copyright (C) 2009-2012 Free Software Foundation, Inc.
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2009-07-03 09:48:56 +00:00
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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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2012-02-09 23:18:22 +00:00
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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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2009-07-03 09:48:56 +00:00
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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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2009-12-13 17:47:02 +00:00
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#include <init-arch.h>
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2009-07-03 09:48:56 +00:00
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#ifdef USE_AS_STRPBRK
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#define STRCSPN_SSE42 __strpbrk_sse42
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#define STRCSPN_SSE2 __strpbrk_sse2
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#define __GI_STRCSPN __GI_strpbrk
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#else
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#ifndef STRCSPN
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#define STRCSPN strcspn
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#define STRCSPN_SSE42 __strcspn_sse42
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#define STRCSPN_SSE2 __strcspn_sse2
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#define __GI_STRCSPN __GI_strcspn
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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 strpbrk in static library since we
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need strpbrk before the initialization happened. */
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#if (defined SHARED || !defined USE_AS_STRPBRK) && !defined NOT_IN_libc
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.text
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ENTRY(STRCSPN)
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.type STRCSPN, @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 STRCSPN_SSE2(%rip), %rax
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2009-12-13 17:47:02 +00:00
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testl $bit_SSE4_2, __cpu_features+CPUID_OFFSET+index_SSE4_2(%rip)
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2009-07-03 09:48:56 +00:00
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jz 2f
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leaq STRCSPN_SSE42(%rip), %rax
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2: ret
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END(STRCSPN)
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# undef ENTRY
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# define ENTRY(name) \
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.type STRCSPN_SSE2, @function; \
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.globl STRCSPN_SSE2; \
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.align 16; \
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STRCSPN_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 STRCSPN_SSE2, .-STRCSPN_SSE2
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# undef libc_hidden_builtin_def
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/* It doesn't make sense to send libc-internal strcspn 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_STRCSPN; __GI_STRCSPN = STRCSPN_SSE2
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#endif
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#endif /* HAVE_SSE4_SUPPORT */
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#ifdef USE_AS_STRPBRK
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#include "../strpbrk.S"
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#else
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#include "../strcspn.S"
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#endif
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