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author | Ondrej Bilka <neleai@seznam.cz> | 2013-03-06 22:27:18 +0100 |
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committer | Ondrej Bilka <neleai@seznam.cz> | 2013-03-06 22:27:18 +0100 |
commit | 87bd9bc4bd2a49a441bb9ba744c9ddb0c9434823 (patch) | |
tree | ddef45a58945fed230d26a155bbc10739b3fa864 /sysdeps/x86_64/multiarch/strnlen.S | |
parent | b79188d71716b6286866e06add976fe84100595e (diff) | |
download | glibc-87bd9bc4bd2a49a441bb9ba744c9ddb0c9434823.tar.gz glibc-87bd9bc4bd2a49a441bb9ba744c9ddb0c9434823.tar.xz glibc-87bd9bc4bd2a49a441bb9ba744c9ddb0c9434823.zip |
Revert " * sysdeps/x86_64/strlen.S: Replace with new SSE2 based implementation"
This reverts commit b79188d71716b6286866e06add976fe84100595e.
Diffstat (limited to 'sysdeps/x86_64/multiarch/strnlen.S')
-rw-r--r-- | sysdeps/x86_64/multiarch/strnlen.S | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/sysdeps/x86_64/multiarch/strnlen.S b/sysdeps/x86_64/multiarch/strnlen.S new file mode 100644 index 0000000000..124f8458a3 --- /dev/null +++ b/sysdeps/x86_64/multiarch/strnlen.S @@ -0,0 +1,57 @@ +/* multiple version of strnlen + All versions must be listed in ifunc-impl-list.c. + Copyright (C) 2011-2013 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, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> +#include <init-arch.h> + + +/* Define multiple versions only for the definition in libc. */ +#ifndef NOT_IN_libc + + .text +ENTRY(__strnlen) + .type __strnlen, @gnu_indirect_function + cmpl $0, __cpu_features+KIND_OFFSET(%rip) + jne 1f + call __init_cpu_features +1: leaq __strnlen_sse2(%rip), %rax + testl $bit_Slow_BSF, __cpu_features+FEATURE_OFFSET+index_Slow_BSF(%rip) + jz 2f + leaq __strnlen_sse2_no_bsf(%rip), %rax +2: ret +END(__strnlen) + +# undef ENTRY +# define ENTRY(name) \ + .type __strnlen_sse2, @function; \ + .align 16; \ + .globl __strnlen_sse2; \ + .hidden __strnlen_sse2; \ + __strnlen_sse2: cfi_startproc; \ + CALL_MCOUNT +# undef END +# define END(name) \ + cfi_endproc; .size __strnlen_sse2, .-__strnlen_sse2 + +# undef libc_hidden_def +# define libc_hidden_def(name) \ + .globl __GI_strnlen; __GI_strnlen = __strnlen_sse2 +#endif + +#include "../strnlen.S" |