1 /* Multiple versions of memcmp
2 All versions must be listed in ifunc-impl-list.c.
3 Copyright (C) 2010-2015 Free Software Foundation, Inc.
4 Contributed by Intel Corporation.
5 This file is part of the GNU C Library.
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public
9 License as published by the Free Software Foundation; either
10 version 2.1 of the License, or (at your option) any later version.
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public
18 License along with the GNU C Library; if not, see
19 <http://www.gnu.org/licenses/>. */
22 #include <init-arch.h>
24 /* Define multiple versions only for the definition in libc. */
29 .type memcmp, @gnu_indirect_function
31 cfi_adjust_cfa_offset (4)
32 cfi_rel_offset (ebx, 0)
34 cmpl $0, KIND_OFFSET+__cpu_features@GOTOFF(%ebx)
36 call __init_cpu_features
37 1: leal __memcmp_ia32@GOTOFF(%ebx), %eax
38 testl $bit_SSSE3, CPUID_OFFSET+index_SSSE3+__cpu_features@GOTOFF(%ebx)
40 leal __memcmp_ssse3@GOTOFF(%ebx), %eax
41 testl $bit_SSE4_2, CPUID_OFFSET+index_SSE4_2+__cpu_features@GOTOFF(%ebx)
43 leal __memcmp_sse4_2@GOTOFF(%ebx), %eax
45 cfi_adjust_cfa_offset (-4)
52 .type memcmp, @gnu_indirect_function
53 cmpl $0, KIND_OFFSET+__cpu_features
55 call __init_cpu_features
56 1: leal __memcmp_ia32, %eax
57 testl $bit_SSSE3, CPUID_OFFSET+index_SSSE3+__cpu_features
59 leal __memcmp_ssse3, %eax
60 testl $bit_SSE4_2, CPUID_OFFSET+index_SSE4_2+__cpu_features
62 leal __memcmp_sse4_2, %eax
68 # define ENTRY(name) \
69 .type __memcmp_ia32, @function; \
71 .globl __memcmp_ia32; \
72 .hidden __memcmp_ia32; \
73 __memcmp_ia32: cfi_startproc; \
77 cfi_endproc; .size __memcmp_ia32, .-__memcmp_ia32
80 # undef libc_hidden_builtin_def
81 /* IFUNC doesn't work with the hidden functions in shared library since
82 they will be called without setting up EBX needed for PLT which is
84 # define libc_hidden_builtin_def(name) \
85 .globl __GI_memcmp; __GI_memcmp = __memcmp_ia32
89 #include "../memcmp.S"