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| author | H.J. Lu <hongjiu.lu@intel.com> | 2010-11-08 03:41:34 -0500 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2010-11-08 03:41:34 -0500 |
| commit | ff02d5280bf252e86d325ff4348feaf531ede831 (patch) | |
| tree | 243484af328916c3945588aab649615521ceebc6 /sysdeps/x86_64/multiarch/bzero.S | |
| parent | 344d0b545d0a0a0ab737ff333d807969721ce381 (diff) | |
| download | glibc-ff02d5280bf252e86d325ff4348feaf531ede831.tar glibc-ff02d5280bf252e86d325ff4348feaf531ede831.tar.gz glibc-ff02d5280bf252e86d325ff4348feaf531ede831.tar.bz2 glibc-ff02d5280bf252e86d325ff4348feaf531ede831.zip | |
Use IFUNC on x86-64 memset
Diffstat (limited to 'sysdeps/x86_64/multiarch/bzero.S')
| -rw-r--r-- | sysdeps/x86_64/multiarch/bzero.S | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/sysdeps/x86_64/multiarch/bzero.S b/sysdeps/x86_64/multiarch/bzero.S new file mode 100644 index 0000000000..9c9eebd5ef --- /dev/null +++ b/sysdeps/x86_64/multiarch/bzero.S @@ -0,0 +1,56 @@ +/* Multiple versions of bzero + Copyright (C) 2010 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sysdep.h> +#include <init-arch.h> + + .text +ENTRY(__bzero) + .type __bzero, @gnu_indirect_function + cmpl $0, __cpu_features+KIND_OFFSET(%rip) + jne 1f + call __init_cpu_features +1: leaq __bzero_x86_64(%rip), %rax + testl $bit_Prefer_SSE_for_memop, __cpu_features+FEATURE_OFFSET+index_Prefer_SSE_for_memop(%rip) + jz 2f + leaq __bzero_sse2(%rip), %rax +2: ret +END(__bzero) + + .type __bzero_sse2, @function +__bzero_sse2: + cfi_startproc + CALL_MCOUNT + mov %rsi,%rdx /* Adjust parameter. */ + xorl %esi,%esi /* Fill with 0s. */ + jmp __memset_sse2 + cfi_endproc + .size __bzero_sse2, .-__bzero_sse2 + + .type __bzero_x86_64, @function +__bzero_x86_64: + cfi_startproc + CALL_MCOUNT + mov %rsi,%rdx /* Adjust parameter. */ + xorl %esi,%esi /* Fill with 0s. */ + jmp __memset_x86_64 + cfi_endproc + .size __bzero_x86_64, .-__bzero_x86_64 + +weak_alias (__bzero, bzero) |