xref: /aosp_15_r20/bionic/libc/arch-x86_64/dynamic_function_dispatch.cpp (revision 8d67ca893c1523eb926b9080dbe4e2ffd2a27ba1)
1 /*
2  * Copyright (C) 2022 The Android Open Source Project
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  *  * Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  *  * Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in
12  *    the documentation and/or other materials provided with the
13  *    distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19  * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  */
28 
29 #include <stddef.h>
30 
31 #include <private/bionic_ifuncs.h>
32 
33 extern "C" {
34 
DEFINE_IFUNC_FOR(memset)35 DEFINE_IFUNC_FOR(memset) {
36   __builtin_cpu_init();
37   if (__builtin_cpu_supports("avx2")) RETURN_FUNC(memset_func_t, memset_avx2);
38   RETURN_FUNC(memset_func_t, memset_generic);
39 }
40 MEMSET_SHIM()
41 
DEFINE_IFUNC_FOR(__memset_chk)42 DEFINE_IFUNC_FOR(__memset_chk) {
43   __builtin_cpu_init();
44   if (__builtin_cpu_supports("avx2")) RETURN_FUNC(__memset_chk_func_t, __memset_chk_avx2);
45   RETURN_FUNC(__memset_chk_func_t, __memset_chk_generic);
46 }
47 __MEMSET_CHK_SHIM()
48 
49 }  // extern "C"
50