| /* Multiple versions of strcat |
| All versions must be listed in ifunc-impl-list.c. |
| Copyright (C) 2009-2014 Free Software Foundation, Inc. |
| Contributed by Intel Corporation. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <sysdep.h> |
| #include <init-arch.h> |
| |
| #ifndef USE_AS_STRNCAT |
| # ifndef STRCAT |
| # define STRCAT strcat |
| # endif |
| #endif |
| |
| #ifdef USE_AS_STRNCAT |
| # define STRCAT_SSSE3 __strncat_ssse3 |
| # define STRCAT_SSE2 __strncat_sse2 |
| # define STRCAT_SSE2_UNALIGNED __strncat_sse2_unaligned |
| # define __GI_STRCAT __GI_strncat |
| # define __GI___STRCAT __GI___strncat |
| #else |
| # define STRCAT_SSSE3 __strcat_ssse3 |
| # define STRCAT_SSE2 __strcat_sse2 |
| # define STRCAT_SSE2_UNALIGNED __strcat_sse2_unaligned |
| # define __GI_STRCAT __GI_strcat |
| # define __GI___STRCAT __GI___strcat |
| #endif |
| |
| |
| /* Define multiple versions only for the definition in libc. */ |
| #ifndef NOT_IN_libc |
| .text |
| ENTRY(STRCAT) |
| .type STRCAT, @gnu_indirect_function |
| cmpl $0, __cpu_features+KIND_OFFSET(%rip) |
| jne 1f |
| call __init_cpu_features |
| 1: leaq STRCAT_SSE2_UNALIGNED(%rip), %rax |
| testl $bit_Fast_Unaligned_Load, __cpu_features+FEATURE_OFFSET+index_Fast_Unaligned_Load(%rip) |
| jnz 2f |
| leaq STRCAT_SSE2(%rip), %rax |
| testl $bit_SSSE3, __cpu_features+CPUID_OFFSET+index_SSSE3(%rip) |
| jz 2f |
| leaq STRCAT_SSSE3(%rip), %rax |
| 2: ret |
| END(STRCAT) |
| |
| # undef ENTRY |
| # define ENTRY(name) \ |
| .type STRCAT_SSE2, @function; \ |
| .align 16; \ |
| .globl STRCAT_SSE2; \ |
| .hidden STRCAT_SSE2; \ |
| STRCAT_SSE2: cfi_startproc; \ |
| CALL_MCOUNT |
| # undef END |
| # define END(name) \ |
| cfi_endproc; .size STRCAT_SSE2, .-STRCAT_SSE2 |
| # undef libc_hidden_builtin_def |
| /* It doesn't make sense to send libc-internal strcat calls through a PLT. |
| The speedup we get from using SSSE3 instruction is likely eaten away |
| by the indirect call in the PLT. */ |
| # define libc_hidden_builtin_def(name) \ |
| .globl __GI_STRCAT; __GI_STRCAT = STRCAT_SSE2 |
| # undef libc_hidden_def |
| # define libc_hidden_def(name) \ |
| .globl __GI___STRCAT; __GI___STRCAT = STRCAT_SSE2 |
| #endif |
| |
| #ifndef USE_AS_STRNCAT |
| # include "../strcat.S" |
| #endif |
