diff options
Diffstat (limited to 'sysdeps/i386/i686/multiarch/strcat.S')
| -rw-r--r-- | sysdeps/i386/i686/multiarch/strcat.S | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/sysdeps/i386/i686/multiarch/strcat.S b/sysdeps/i386/i686/multiarch/strcat.S new file mode 100644 index 0000000000..50850f977f --- /dev/null +++ b/sysdeps/i386/i686/multiarch/strcat.S @@ -0,0 +1,131 @@ +/* Multiple versions of strcat + Copyright (C) 2011 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#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_IA32 __strncat_ia32 +# define __GI_STRCAT __GI_strncat +#else +# define STRCAT_SSSE3 __strcat_ssse3 +# define STRCAT_SSE2 __strcat_sse2 +# define STRCAT_IA32 __strcat_ia32 +# define __GI_STRCAT __GI_strcat +#endif + + +/* Define multiple versions only for the definition in libc. Don't + define multiple versions for strncat in static library since we + need strncat before the initialization happened. */ +#ifndef NOT_IN_libc + +# ifdef SHARED + .section .gnu.linkonce.t.__i686.get_pc_thunk.bx,"ax",@progbits + .globl __i686.get_pc_thunk.bx + .hidden __i686.get_pc_thunk.bx + .p2align 4 + .type __i686.get_pc_thunk.bx,@function +__i686.get_pc_thunk.bx: + movl (%esp), %ebx + ret + + .text +ENTRY(STRCAT) + .type STRCAT, @gnu_indirect_function + pushl %ebx + cfi_adjust_cfa_offset (4) + cfi_rel_offset (ebx, 0) + call __i686.get_pc_thunk.bx + addl $_GLOBAL_OFFSET_TABLE_, %ebx + cmpl $0, KIND_OFFSET+__cpu_features@GOTOFF(%ebx) + jne 1f + call __init_cpu_features +1: leal STRCAT_IA32@GOTOFF(%ebx), %eax + testl $bit_SSE2, CPUID_OFFSET+index_SSE2+__cpu_features@GOTOFF(%ebx) + jz 2f + leal STRCAT_SSE2@GOTOFF(%ebx), %eax + testl $bit_Fast_Unaligned_Load, FEATURE_OFFSET+index_Fast_Unaligned_Load+__cpu_features@GOTOFF(%ebx) + jnz 2f + testl $bit_SSSE3, CPUID_OFFSET+index_SSSE3+__cpu_features@GOTOFF(%ebx) + jz 2f + leal STRCAT_SSSE3@GOTOFF(%ebx), %eax +2: popl %ebx + cfi_adjust_cfa_offset (-4) + cfi_restore (ebx) + ret +END(STRCAT) +# else + +ENTRY(STRCAT) + .type STRCAT, @gnu_indirect_function + cmpl $0, KIND_OFFSET+__cpu_features + jne 1f + call __init_cpu_features +1: leal STRCAT_IA32, %eax + testl $bit_SSE2, CPUID_OFFSET+index_SSE2+__cpu_features + jz 2f + leal STRCAT_SSE2, %eax + testl $bit_Fast_Unaligned_Load, FEATURE_OFFSET+index_Fast_Unaligned_Load+__cpu_features + jnz 2f + testl $bit_SSSE3, CPUID_OFFSET+index_SSSE3+__cpu_features + jz 2f + leal STRCAT_SSSE3, %eax +2: ret +END(STRCAT) + +# endif + +# undef ENTRY +# define ENTRY(name) \ + .type STRCAT_IA32, @function; \ + .align 16; \ + STRCAT_IA32: cfi_startproc; \ + CALL_MCOUNT +# undef END +# define END(name) \ + cfi_endproc; .size STRCAT_IA32, .-STRCAT_IA32 + +# ifdef SHARED +# 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_IA32 +# undef libc_hidden_def +# define libc_hidden_def(name) \ + .globl __GI___STRCAT; __GI___STRCAT = STRCAT_IA32 + +# endif +#endif + +#ifndef USE_AS_STRNCAT +# include "../../i486/strcat.S" +#endif + |