diff options
Diffstat (limited to 'sysdeps/x86_64/multiarch/strspn.S')
| -rw-r--r-- | sysdeps/x86_64/multiarch/strspn.S | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/sysdeps/x86_64/multiarch/strspn.S b/sysdeps/x86_64/multiarch/strspn.S new file mode 100644 index 0000000000..4183a2cf60 --- /dev/null +++ b/sysdeps/x86_64/multiarch/strspn.S @@ -0,0 +1,63 @@ +/* Multiple versions of strspn + Copyright (C) 2009 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 <config.h> + +#ifdef HAVE_SSE4_SUPPORT + +#include <sysdep.h> +#include <ifunc-defines.h> + +/* Define multiple versions only for the definition in libc. */ +#ifndef NOT_IN_libc + .text +ENTRY(strspn) + .type strspn, @gnu_indirect_function + cmpl $0, __cpu_features+KIND_OFFSET(%rip) + jne 1f + call __init_cpu_features +1: leaq __strspn_sse2(%rip), %rax + testl $(1<<20), __cpu_features+CPUID_OFFSET+COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET(%rip) + jz 2f + leaq __strspn_sse42(%rip), %rax +2: ret +END(strspn) + +# undef ENTRY +# define ENTRY(name) \ + .type __strspn_sse2, @function; \ + .globl __strspn_sse2; \ + .align 16; \ + __strspn_sse2: cfi_startproc; \ + CALL_MCOUNT +# undef END +# define END(name) \ + cfi_endproc; .size __strspn_sse2, .-__strspn_sse2 +# undef libc_hidden_builtin_def +/* It doesn't make sense to send libc-internal strspn calls through a PLT. + The speedup we get from using SSE4.2 instruction is likely eaten away + by the indirect call in the PLT. */ +# define libc_hidden_builtin_def(name) \ + .globl __GI_strspn; __GI_strspn = __strspn_sse2 +#endif + +#endif /* HAVE_SSE4_SUPPORT */ + +#include "../strspn.S" |