| /* Multiple versions of strcmp |
| All versions must be listed in ifunc-impl-list.c. |
| Copyright (C) 2010-2014 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> |
| |
| #ifdef USE_AS_STRNCMP |
| # define STRCMP strncmp |
| # define __GI_STRCMP __GI_strncmp |
| # define __STRCMP_IA32 __strncmp_ia32 |
| # define __STRCMP_SSSE3 __strncmp_ssse3 |
| # define __STRCMP_SSE4_2 __strncmp_sse4_2 |
| #elif defined USE_AS_STRCASECMP_L |
| # define STRCMP __strcasecmp_l |
| # define __GI_STRCMP __GI_strcasecmp_l |
| # define __STRCMP_IA32 __strcasecmp_l_ia32 |
| # define __STRCMP_SSSE3 __strcasecmp_l_ssse3 |
| # define __STRCMP_SSE4_2 __strcasecmp_l_sse4_2 |
| #elif defined USE_AS_STRNCASECMP_L |
| # define STRCMP __strncasecmp_l |
| # define __GI_STRCMP __GI_strncasecmp_l |
| # define __STRCMP_IA32 __strncasecmp_l_ia32 |
| # define __STRCMP_SSSE3 __strncasecmp_l_ssse3 |
| # define __STRCMP_SSE4_2 __strncasecmp_l_sse4_2 |
| #else |
| # define STRCMP strcmp |
| # define __GI_STRCMP __GI_strcmp |
| # define __STRCMP_IA32 __strcmp_ia32 |
| # define __STRCMP_SSSE3 __strcmp_ssse3 |
| # define __STRCMP_SSE4_2 __strcmp_sse4_2 |
| #endif |
| |
| /* Define multiple versions only for the definition in libc. Don't |
| define multiple versions for strncmp in static library since we |
| need strncmp before the initialization happened. */ |
| #if (defined SHARED || !defined USE_AS_STRNCMP) && !defined NOT_IN_libc |
| # ifdef SHARED |
| .text |
| ENTRY(STRCMP) |
| .type STRCMP, @gnu_indirect_function |
| pushl %ebx |
| cfi_adjust_cfa_offset (4) |
| cfi_rel_offset (ebx, 0) |
| LOAD_PIC_REG(bx) |
| cmpl $0, KIND_OFFSET+__cpu_features@GOTOFF(%ebx) |
| jne 1f |
| call __init_cpu_features |
| 1: leal __STRCMP_IA32@GOTOFF(%ebx), %eax |
| testl $bit_SSSE3, CPUID_OFFSET+index_SSSE3+__cpu_features@GOTOFF(%ebx) |
| jz 2f |
| leal __STRCMP_SSSE3@GOTOFF(%ebx), %eax |
| testl $bit_SSE4_2, CPUID_OFFSET+index_SSE4_2+__cpu_features@GOTOFF(%ebx) |
| jz 2f |
| testl $bit_Slow_SSE4_2, CPUID_OFFSET+index_Slow_SSE4_2+__cpu_features@GOTOFF(%ebx) |
| jnz 2f |
| leal __STRCMP_SSE4_2@GOTOFF(%ebx), %eax |
| 2: popl %ebx |
| cfi_adjust_cfa_offset (-4) |
| cfi_restore (ebx) |
| ret |
| END(STRCMP) |
| # else |
| .text |
| ENTRY(STRCMP) |
| .type STRCMP, @gnu_indirect_function |
| cmpl $0, KIND_OFFSET+__cpu_features |
| jne 1f |
| call __init_cpu_features |
| 1: leal __STRCMP_IA32, %eax |
| testl $bit_SSSE3, CPUID_OFFSET+index_SSSE3+__cpu_features |
| jz 2f |
| leal __STRCMP_SSSE3, %eax |
| testl $bit_SSE4_2, CPUID_OFFSET+index_SSE4_2+__cpu_features |
| jz 2f |
| testl $bit_Slow_SSE4_2, CPUID_OFFSET+index_Slow_SSE4_2+__cpu_features |
| jnz 2f |
| leal __STRCMP_SSE4_2, %eax |
| 2: ret |
| END(STRCMP) |
| # endif |
| |
| # undef ENTRY |
| # define ENTRY(name) \ |
| .type __STRCMP_IA32, @function; \ |
| .p2align 4; \ |
| .globl __STRCMP_IA32; \ |
| .hidden __STRCMP_IA32; \ |
| __STRCMP_IA32: cfi_startproc; \ |
| CALL_MCOUNT |
| # undef END |
| # define END(name) \ |
| cfi_endproc; .size __STRCMP_IA32, .-__STRCMP_IA32 |
| |
| # ifdef SHARED |
| # undef libc_hidden_builtin_def |
| /* IFUNC doesn't work with the hidden functions in shared library since |
| they will be called without setting up EBX needed for PLT which is |
| used by IFUNC. */ |
| # define libc_hidden_builtin_def(name) \ |
| .globl __GI_STRCMP; __GI_STRCMP = __STRCMP_IA32 |
| # endif |
| #endif |
| |
| #if !defined USE_AS_STRNCMP && !defined USE_AS_STRCASECMP_L \ |
| && !defined USE_AS_STRNCASECMP_L |
| # include "../strcmp.S" |
| #endif |
