1 | /* Multiple versions of strcat |
2 | All versions must be listed in ifunc-impl-list.c. |
3 | Copyright (C) 2009-2016 Free Software Foundation, Inc. |
4 | Contributed by Intel Corporation. |
5 | This file is part of the GNU C Library. |
6 | |
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. |
11 | |
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. |
16 | |
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/>. */ |
20 | |
21 | #include <sysdep.h> |
22 | #include <init-arch.h> |
23 | |
24 | #ifndef USE_AS_STRNCAT |
25 | # ifndef STRCAT |
26 | # define STRCAT strcat |
27 | # endif |
28 | #endif |
29 | |
30 | #ifdef USE_AS_STRNCAT |
31 | # define STRCAT_SSSE3 __strncat_ssse3 |
32 | # define STRCAT_SSE2 __strncat_sse2 |
33 | # define STRCAT_SSE2_UNALIGNED __strncat_sse2_unaligned |
34 | # define __GI_STRCAT __GI_strncat |
35 | # define __GI___STRCAT __GI___strncat |
36 | #else |
37 | # define STRCAT_SSSE3 __strcat_ssse3 |
38 | # define STRCAT_SSE2 __strcat_sse2 |
39 | # define STRCAT_SSE2_UNALIGNED __strcat_sse2_unaligned |
40 | # define __GI_STRCAT __GI_strcat |
41 | # define __GI___STRCAT __GI___strcat |
42 | #endif |
43 | |
44 | |
45 | /* Define multiple versions only for the definition in libc. */ |
46 | #if IS_IN (libc) |
47 | .text |
48 | ENTRY(STRCAT) |
49 | .type STRCAT, @gnu_indirect_function |
50 | LOAD_RTLD_GLOBAL_RO_RDX |
51 | leaq STRCAT_SSE2_UNALIGNED(%rip), %rax |
52 | HAS_ARCH_FEATURE (Fast_Unaligned_Load) |
53 | jnz 2f |
54 | leaq STRCAT_SSE2(%rip), %rax |
55 | HAS_CPU_FEATURE (SSSE3) |
56 | jz 2f |
57 | leaq STRCAT_SSSE3(%rip), %rax |
58 | 2: ret |
59 | END(STRCAT) |
60 | |
61 | # undef ENTRY |
62 | # define ENTRY(name) \ |
63 | .type STRCAT_SSE2, @function; \ |
64 | .align 16; \ |
65 | .globl STRCAT_SSE2; \ |
66 | .hidden STRCAT_SSE2; \ |
67 | STRCAT_SSE2: cfi_startproc; \ |
68 | CALL_MCOUNT |
69 | # undef END |
70 | # define END(name) \ |
71 | cfi_endproc; .size STRCAT_SSE2, .-STRCAT_SSE2 |
72 | # undef libc_hidden_builtin_def |
73 | /* It doesn't make sense to send libc-internal strcat calls through a PLT. |
74 | The speedup we get from using SSSE3 instruction is likely eaten away |
75 | by the indirect call in the PLT. */ |
76 | # define libc_hidden_builtin_def(name) \ |
77 | .globl __GI_STRCAT; __GI_STRCAT = STRCAT_SSE2 |
78 | # undef libc_hidden_def |
79 | # define libc_hidden_def(name) \ |
80 | .globl __GI___STRCAT; __GI___STRCAT = STRCAT_SSE2 |
81 | #endif |
82 | |
83 | #ifndef USE_AS_STRNCAT |
84 | # include "../strcat.S" |
85 | #endif |
86 | |