2010-11-08 08:41:34 +00:00
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/* Multiple versions of bzero
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Copyright (C) 2010 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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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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2010-11-08 08:41:34 +00:00
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#include <sysdep.h>
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#include <init-arch.h>
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.text
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ENTRY(__bzero)
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.type __bzero, @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 __bzero_x86_64(%rip), %rax
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testl $bit_Prefer_SSE_for_memop, __cpu_features+FEATURE_OFFSET+index_Prefer_SSE_for_memop(%rip)
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jz 2f
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leaq __bzero_sse2(%rip), %rax
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2: ret
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END(__bzero)
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.type __bzero_sse2, @function
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__bzero_sse2:
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cfi_startproc
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CALL_MCOUNT
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mov %rsi,%rdx /* Adjust parameter. */
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xorl %esi,%esi /* Fill with 0s. */
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jmp __memset_sse2
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cfi_endproc
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.size __bzero_sse2, .-__bzero_sse2
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.type __bzero_x86_64, @function
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__bzero_x86_64:
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cfi_startproc
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CALL_MCOUNT
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mov %rsi,%rdx /* Adjust parameter. */
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xorl %esi,%esi /* Fill with 0s. */
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jmp __memset_x86_64
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cfi_endproc
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.size __bzero_x86_64, .-__bzero_x86_64
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weak_alias (__bzero, bzero)
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