diff options
| author | Anton Khirnov <anton@khirnov.net> | 2018-12-27 11:25:30 +0100 |
|---|---|---|
| committer | Anton Khirnov <anton@khirnov.net> | 2018-12-27 11:56:47 +0100 |
| commit | ebb69e5e3765c0a65f92d4eb5e4ae8ba56c23f94 (patch) | |
| tree | 9ab88212e897e7c4f32a5bca312c7a1208239c46 /cpuid.asm | |
| parent | 8b99b8dc65863c60f0473dc0bfeeaf6f8dd2550e (diff) | |
Add CPU feature detection.
Will be used for dynamically dispatching future asm functions.
Diffstat (limited to 'cpuid.asm')
| -rw-r--r-- | cpuid.asm | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/cpuid.asm b/cpuid.asm new file mode 100644 index 0000000..bb602a3 --- /dev/null +++ b/cpuid.asm @@ -0,0 +1,64 @@ +;***************************************************************************** +;* Copyright (C) 2005-2010 x264 project +;* +;* Authors: Loren Merritt <lorenm@u.washington.edu> +;* Fiona Glaser <fiona@x264.com> +;* +;* This file is part of Libav. +;* +;* Libav 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. +;* +;* Libav 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 Libav; if not, write to the Free Software +;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA +;****************************************************************************** + +%include "config.asm" +%include "x86inc.asm" + +SECTION .text + +;----------------------------------------------------------------------------- +; void mg2di_cpu_cpuid(int index, int *eax, int *ebx, int *ecx, int *edx) +;----------------------------------------------------------------------------- +cglobal cpu_cpuid, 5,7 + push rbx + push r4 + push r3 + push r2 + push r1 + mov eax, r0d + xor ecx, ecx + cpuid + pop r4 + mov [r4], eax + pop r4 + mov [r4], ebx + pop r4 + mov [r4], ecx + pop r4 + mov [r4], edx + pop rbx + RET + +;----------------------------------------------------------------------------- +; void mg2di_cpu_xgetbv(int op, int *eax, int *edx) +;----------------------------------------------------------------------------- +cglobal cpu_xgetbv, 3,7 + push r2 + push r1 + mov ecx, r0d + xgetbv + pop r4 + mov [r4], eax + pop r4 + mov [r4], edx + RET |