mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-26 06:50:07 +00:00
60 lines
1.9 KiB
ArmAsm
60 lines
1.9 KiB
ArmAsm
/* Multiple versions of memcmp
|
|
Copyright (C) 2010 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(memcmp)
|
|
.type memcmp, @gnu_indirect_function
|
|
cmpl $0, KIND_OFFSET+__cpu_features(%rip)
|
|
jne 1f
|
|
call __init_cpu_features
|
|
1: leaq __memcmp_sse2(%rip), %rax
|
|
testl $bit_SSE4_1, __cpu_features+CPUID_OFFSET+index_SSE4_1(%rip)
|
|
jz 2f
|
|
leaq __memcmp_sse4_1(%rip), %rax
|
|
2: ret
|
|
END(memcmp)
|
|
|
|
# undef ENTRY
|
|
# define ENTRY(name) \
|
|
.type __memcmp_sse2, @function; \
|
|
.p2align 4; \
|
|
__memcmp_sse2: cfi_startproc; \
|
|
CALL_MCOUNT
|
|
# undef END
|
|
# define END(name) \
|
|
cfi_endproc; .size __memcmp_sse2, .-__memcmp_sse2
|
|
|
|
# ifdef SHARED
|
|
# 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_memcmp; __GI_memcmp = __memcmp_sse2
|
|
# endif
|
|
#endif
|
|
|
|
#include "../memcmp.S"
|