1 /* Multiple versions of memcmp
2 Copyright (C) 2010, 2011 Free Software Foundation, Inc.
3 Contributed by Intel Corporation.
4 This file is part of the GNU C Library.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
21 #include <init-arch.h>
23 /* Define multiple versions only for the definition in libc. */
27 .type memcmp, @gnu_indirect_function
28 cmpl $0, KIND_OFFSET+__cpu_features(%rip)
30 call __init_cpu_features
32 1: testl $bit_SSSE3, __cpu_features+CPUID_OFFSET+index_SSSE3(%rip)
34 leaq __memcmp_sse2(%rip), %rax
37 2: testl $bit_SSE4_1, __cpu_features+CPUID_OFFSET+index_SSE4_1(%rip)
39 leaq __memcmp_sse4_1(%rip), %rax
42 3: leaq __memcmp_ssse3(%rip), %rax
48 # define ENTRY(name) \
49 .type __memcmp_sse2, @function; \
51 __memcmp_sse2: cfi_startproc; \
55 cfi_endproc; .size __memcmp_sse2, .-__memcmp_sse2
58 # undef libc_hidden_builtin_def
59 /* IFUNC doesn't work with the hidden functions in shared library since
60 they will be called without setting up EBX needed for PLT which is
62 # define libc_hidden_builtin_def(name) \
63 .globl __GI_memcmp; __GI_memcmp = __memcmp_sse2
67 #include "../memcmp.S"