1 /* Multiple versions of strspn
2 All versions must be listed in ifunc-impl-list.c.
3 Copyright (C) 2009-2014 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/>. */
23 #ifdef HAVE_SSE4_SUPPORT
26 #include <init-arch.h>
28 /* Define multiple versions only for the definition in libc. */
32 .type strspn, @gnu_indirect_function
33 cmpl $0, __cpu_features+KIND_OFFSET(%rip)
35 call __init_cpu_features
36 1: leaq __strspn_sse2(%rip), %rax
37 testl $bit_SSE4_2, __cpu_features+CPUID_OFFSET+index_SSE4_2(%rip)
39 leaq __strspn_sse42(%rip), %rax
44 # define ENTRY(name) \
45 .type __strspn_sse2, @function; \
46 .globl __strspn_sse2; \
48 __strspn_sse2: cfi_startproc; \
52 cfi_endproc; .size __strspn_sse2, .-__strspn_sse2
53 # undef libc_hidden_builtin_def
54 /* It doesn't make sense to send libc-internal strspn calls through a PLT.
55 The speedup we get from using SSE4.2 instruction is likely eaten away
56 by the indirect call in the PLT. */
57 # define libc_hidden_builtin_def(name) \
58 .globl __GI_strspn; __GI_strspn = __strspn_sse2
61 #endif /* HAVE_SSE4_SUPPORT */
63 #include "../strspn.S"