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58 lines
1.7 KiB
ArmAsm
58 lines
1.7 KiB
ArmAsm
/* multiple version of strnlen
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All versions must be listed in ifunc-impl-list.c.
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Copyright (C) 2011-2013 Free Software Foundation, Inc.
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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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/* 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(__strnlen)
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.type __strnlen, @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 __strnlen_sse2(%rip), %rax
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testl $bit_Slow_BSF, __cpu_features+FEATURE_OFFSET+index_Slow_BSF(%rip)
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jz 2f
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leaq __strnlen_sse2_no_bsf(%rip), %rax
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2: ret
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END(__strnlen)
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# undef ENTRY
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# define ENTRY(name) \
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.type __strnlen_sse2, @function; \
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.align 16; \
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.globl __strnlen_sse2; \
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.hidden __strnlen_sse2; \
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__strnlen_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 __strnlen_sse2, .-__strnlen_sse2
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# undef libc_hidden_def
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# define libc_hidden_def(name) \
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.globl __GI_strnlen; __GI_strnlen = __strnlen_sse2
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#endif
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#include "../strnlen.S"
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