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Optimize 32bit memset/memcpy with SSE2/SSSE3.
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H.J. Lu
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Ulrich Drepper
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Jan 12, 2010
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,3 @@ | ||
| #define USE_AS_BCOPY | ||
| #define memmove bcopy | ||
| #include <sysdeps/i386/i686/memmove.S> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,4 @@ | ||
| #define USE_AS_MEMMOVE | ||
| #define USE_AS_BCOPY | ||
| #define MEMCPY __bcopy_ssse3_rep | ||
| #include "memcpy-ssse3-rep.S" |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,4 @@ | ||
| #define USE_AS_MEMMOVE | ||
| #define USE_AS_BCOPY | ||
| #define MEMCPY __bcopy_ssse3 | ||
| #include "memcpy-ssse3.S" |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,89 @@ | ||
| /* Multiple versions of bcopy | ||
| Copyright (C) 2010 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> | ||
|
|
||
| /* Define multiple versions only for the definition in lib. */ | ||
| #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(bcopy) | ||
| .type bcopy, @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 __bcopy_ia32@GOTOFF(%ebx), %eax | ||
| testl $bit_SSSE3, CPUID_OFFSET+index_SSSE3+__cpu_features@GOTOFF(%ebx) | ||
| jz 2f | ||
| leal __bcopy_ssse3@GOTOFF(%ebx), %eax | ||
| testl $bit_Fast_Rep_String, FEATURE_OFFSET+index_Fast_Rep_String+__cpu_features@GOTOFF(%ebx) | ||
| jz 2f | ||
| leal __bcopy_ssse3_rep@GOTOFF(%ebx), %eax | ||
| 2: popl %ebx | ||
| cfi_adjust_cfa_offset (-4) | ||
| cfi_restore (ebx) | ||
| ret | ||
| END(bcopy) | ||
| # else | ||
| .text | ||
| ENTRY(bcopy) | ||
| .type bcopy, @gnu_indirect_function | ||
| cmpl $0, KIND_OFFSET+__cpu_features | ||
| jne 1f | ||
| call __init_cpu_features | ||
| 1: leal __bcopy_ia32, %eax | ||
| testl $bit_SSSE3, CPUID_OFFSET+index_SSSE3+__cpu_features | ||
| jz 2f | ||
| leal __bcopy_ssse3, %eax | ||
| testl $bit_Fast_Rep_String, FEATURE_OFFSET+index_Fast_Rep_String+__cpu_features | ||
| jz 2f | ||
| leal __bcopy_ssse3_rep, %eax | ||
| 2: ret | ||
| END(bcopy) | ||
| # endif | ||
|
|
||
| # undef ENTRY | ||
| # define ENTRY(name) \ | ||
| .type __bcopy_ia32, @function; \ | ||
| .p2align 4; \ | ||
| __bcopy_ia32: cfi_startproc; \ | ||
| CALL_MCOUNT | ||
| # undef END | ||
| # define END(name) \ | ||
| cfi_endproc; .size __bcopy_ia32, .-__bcopy_ia32 | ||
|
|
||
| #endif | ||
|
|
||
| #include "../bcopy.S" |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,3 @@ | ||
| #define USE_AS_BZERO | ||
| #define __memset_sse2_rep __bzero_sse2_rep | ||
| #include "memset-sse2-rep.S" |
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| #define USE_AS_BZERO | ||
| #define __memset_sse2 __bzero_sse2 | ||
| #include "memset-sse2.S" |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,97 @@ | ||
| /* Multiple versions of bzero | ||
| Copyright (C) 2010 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> | ||
|
|
||
| /* Define multiple versions only for the definition in lib. */ | ||
| #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(__bzero) | ||
| .type __bzero, @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 __bzero_ia32@GOTOFF(%ebx), %eax | ||
| testl $bit_SSE2, CPUID_OFFSET+index_SSE2+__cpu_features@GOTOFF(%ebx) | ||
| jz 2f | ||
| leal __bzero_sse2@GOTOFF(%ebx), %eax | ||
| testl $bit_Fast_Rep_String, FEATURE_OFFSET+index_Fast_Rep_String+__cpu_features@GOTOFF(%ebx) | ||
| jz 2f | ||
| leal __bzero_sse2_rep@GOTOFF(%ebx), %eax | ||
| 2: popl %ebx | ||
| cfi_adjust_cfa_offset (-4) | ||
| cfi_restore (ebx) | ||
| ret | ||
| END(__bzero) | ||
| # else | ||
| .text | ||
| ENTRY(__bzero) | ||
| .type __bzero, @gnu_indirect_function | ||
| cmpl $0, KIND_OFFSET+__cpu_features | ||
| jne 1f | ||
| call __init_cpu_features | ||
| 1: leal __bzero_ia32, %eax | ||
| testl $bit_SSE2, CPUID_OFFSET+index_SSE2+__cpu_features | ||
| jz 2f | ||
| leal __bzero_sse2, %eax | ||
| testl $bit_Fast_Rep_String, FEATURE_OFFSET+index_Fast_Rep_String+__cpu_features | ||
| jz 2f | ||
| leal __bzero_sse2_rep, %eax | ||
| 2: ret | ||
| END(__bzero) | ||
| # endif | ||
|
|
||
| # undef ENTRY | ||
| # define ENTRY(name) \ | ||
| .type __bzero_ia32, @function; \ | ||
| .p2align 4; \ | ||
| __bzero_ia32: cfi_startproc; \ | ||
| CALL_MCOUNT | ||
| # undef END | ||
| # define END(name) \ | ||
| cfi_endproc; .size __bzero_ia32, .-__bzero_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___bzero; __GI___bzero = __bzero_ia32 | ||
| # endif | ||
| #endif | ||
|
|
||
| #include "../bzero.S" |
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