diff options
Diffstat (limited to 'sysdeps/x86_64/multiarch/wmemcmp.S')
| -rw-r--r-- | sysdeps/x86_64/multiarch/wmemcmp.S | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/sysdeps/x86_64/multiarch/wmemcmp.S b/sysdeps/x86_64/multiarch/wmemcmp.S new file mode 100644 index 0000000000..7c3b7ed178 --- /dev/null +++ b/sysdeps/x86_64/multiarch/wmemcmp.S @@ -0,0 +1,47 @@ +/* Multiple versions of wmemcmp + Copyright (C) 2011 Free Software Foundation, Inc. + Contributed by Intel Corporation. + 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> + +/* Define multiple versions only for the definition in libc. */ +#ifndef NOT_IN_libc + .text +ENTRY(wmemcmp) + .type wmemcmp, @gnu_indirect_function + cmpl $0, KIND_OFFSET+__cpu_features(%rip) + jne 1f + call __init_cpu_features + +1: testl $bit_SSSE3, __cpu_features+CPUID_OFFSET+index_SSSE3(%rip) + jnz 2f + leaq __wmemcmp_sse2(%rip), %rax + ret + +2: testl $bit_SSE4_1, __cpu_features+CPUID_OFFSET+index_SSE4_1(%rip) + jz 3f + leaq __wmemcmp_sse4_1(%rip), %rax + ret + +3: leaq __wmemcmp_ssse3(%rip), %rax + ret + +END(wmemcmp) +#endif |