projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| ff02d528 L |
1 | /* Multiple versions of bzero |
| 2 | Copyright (C) 2010 Free Software Foundation, Inc. | |
| 3 | This file is part of the GNU C Library. | |
| 4 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 6 | modify it under the terms of the GNU Lesser General Public | |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
| 9 | ||
| 10 | The GNU C Library is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | Lesser General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Lesser General Public | |
| 59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| ff02d528 L |
18 | |
| 19 | #include <sysdep.h> | |
| 20 | #include <init-arch.h> | |
| 21 | ||
| 22 | .text | |
| 23 | ENTRY(__bzero) | |
| 24 | .type __bzero, @gnu_indirect_function | |
| 25 | cmpl $0, __cpu_features+KIND_OFFSET(%rip) | |
| 26 | jne 1f | |
| 27 | call __init_cpu_features | |
| 28 | 1: leaq __bzero_x86_64(%rip), %rax | |
| 29 | testl $bit_Prefer_SSE_for_memop, __cpu_features+FEATURE_OFFSET+index_Prefer_SSE_for_memop(%rip) | |
| 30 | jz 2f | |
| 31 | leaq __bzero_sse2(%rip), %rax | |
| 32 | 2: ret | |
| 33 | END(__bzero) | |
| 34 | ||
| 35 | .type __bzero_sse2, @function | |
| 36 | __bzero_sse2: | |
| 37 | cfi_startproc | |
| 38 | CALL_MCOUNT | |
| 39 | mov %rsi,%rdx /* Adjust parameter. */ | |
| 40 | xorl %esi,%esi /* Fill with 0s. */ | |
| 41 | jmp __memset_sse2 | |
| 42 | cfi_endproc | |
| 43 | .size __bzero_sse2, .-__bzero_sse2 | |
| 44 | ||
| 45 | .type __bzero_x86_64, @function | |
| 46 | __bzero_x86_64: | |
| 47 | cfi_startproc | |
| 48 | CALL_MCOUNT | |
| 49 | mov %rsi,%rdx /* Adjust parameter. */ | |
| 50 | xorl %esi,%esi /* Fill with 0s. */ | |
| 51 | jmp __memset_x86_64 | |
| 52 | cfi_endproc | |
| 53 | .size __bzero_x86_64, .-__bzero_x86_64 | |
| 54 | ||
| 55 | weak_alias (__bzero, bzero) |