1 /* Multiple versions of strspn
2 Copyright (C) 2009 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/>. */
22 #ifdef HAVE_SSE4_SUPPORT
25 #include <init-arch.h>
27 /* Define multiple versions only for the definition in libc. */
31 .type strspn, @gnu_indirect_function
32 cmpl $0, __cpu_features+KIND_OFFSET(%rip)
34 call __init_cpu_features
35 1: leaq __strspn_sse2(%rip), %rax
36 testl $bit_SSE4_2, __cpu_features+CPUID_OFFSET+index_SSE4_2(%rip)
38 leaq __strspn_sse42(%rip), %rax
43 # define ENTRY(name) \
44 .type __strspn_sse2, @function; \
45 .globl __strspn_sse2; \
47 __strspn_sse2: cfi_startproc; \
51 cfi_endproc; .size __strspn_sse2, .-__strspn_sse2
52 # undef libc_hidden_builtin_def
53 /* It doesn't make sense to send libc-internal strspn calls through a PLT.
54 The speedup we get from using SSE4.2 instruction is likely eaten away
55 by the indirect call in the PLT. */
56 # define libc_hidden_builtin_def(name) \
57 .globl __GI_strspn; __GI_strspn = __strspn_sse2
60 #endif /* HAVE_SSE4_SUPPORT */
62 #include "../strspn.S"