diff options
Diffstat (limited to 'sysdeps/i386/multiarch/memchr.S')
| -rw-r--r-- | sysdeps/i386/multiarch/memchr.S | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/sysdeps/i386/multiarch/memchr.S b/sysdeps/i386/multiarch/memchr.S new file mode 100644 index 0000000000..4b2b941418 --- /dev/null +++ b/sysdeps/i386/multiarch/memchr.S @@ -0,0 +1,65 @@ +/* Multiple versions of memchr + All versions must be listed in ifunc-impl-list.c. + Copyright (C) 2011-2015 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, see + <http://www.gnu.org/licenses/>. */ + +#if IS_IN (libc) +# include <sysdep.h> +# include <init-arch.h> + + .text +ENTRY(__memchr) + .type __memchr, @gnu_indirect_function + LOAD_GOT_AND_RTLD_GLOBAL_RO + HAS_CPU_FEATURE (SSE2) + jz 2f + HAS_ARCH_FEATURE (Slow_BSF) + jz 3f + + LOAD_FUNC_GOT_EAX ( __memchr_sse2) + ret + +2: LOAD_FUNC_GOT_EAX (__memchr_i386) + ret + +3: LOAD_FUNC_GOT_EAX (__memchr_sse2_bsf) + ret +END(__memchr) + +weak_alias(__memchr, memchr) + +# undef ENTRY +# define ENTRY(name) \ + .type __memchr_i386, @function; \ + .globl __memchr_i386; \ + .p2align 4; \ + __memchr_i386: cfi_startproc; \ + CALL_MCOUNT +# undef END +# define END(name) \ + cfi_endproc; .size __memchr_i386, .-__memchr_i386 + +# undef libc_hidden_builtin_def +/* IFUNC doesn't work with the hidden functions in shared library since + they will be called without setting up EBX needed for PLT which is + used by IFUNC. */ +# define libc_hidden_builtin_def(name) \ + .globl __GI_memchr; __GI_memchr = __memchr_i386 + +#endif +#include <sysdeps/i386/memchr.S> |