2006-09-10 16:02:42 +02:00
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/*
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* CPU detection code, extracted from mmx.h
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* (c)1997-99 by H. Dietz and R. Fisher
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* Converted to C and improved by Fabrice Bellard.
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*
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2006-10-07 17:30:46 +02:00
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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2006-09-10 16:02:42 +02:00
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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2006-10-07 17:30:46 +02:00
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* version 2.1 of the License, or (at your option) any later version.
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2006-09-10 16:02:42 +02:00
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*
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2006-10-07 17:30:46 +02:00
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* FFmpeg is distributed in the hope that it will be useful,
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2006-09-10 16:02:42 +02:00
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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2006-10-07 17:30:46 +02:00
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* License along with FFmpeg; if not, write to the Free Software
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2006-09-10 16:02:42 +02:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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2001-07-22 16:18:56 +02:00
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#include <stdlib.h>
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2007-05-16 11:51:45 +02:00
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#include "dsputil.h"
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2008-03-18 00:08:19 +01:00
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#include "x86_cpu.h"
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2001-07-22 16:18:56 +02:00
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2006-10-07 13:30:24 +02:00
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#undef printf
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2001-08-05 18:49:57 +02:00
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/* ebx saving is necessary for PIC. gcc seems unable to see it alone */
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#define cpuid(index,eax,ebx,ecx,edx)\
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2008-02-24 15:46:22 +01:00
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asm volatile\
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2005-12-22 02:10:11 +01:00
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("mov %%"REG_b", %%"REG_S"\n\t"\
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2001-08-05 18:49:57 +02:00
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"cpuid\n\t"\
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2004-10-11 04:19:29 +02:00
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"xchg %%"REG_b", %%"REG_S\
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2001-08-05 18:49:57 +02:00
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: "=a" (eax), "=S" (ebx),\
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"=c" (ecx), "=d" (edx)\
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2001-08-08 18:26:51 +02:00
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: "0" (index));
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2001-07-22 16:18:56 +02:00
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/* Function to test if multimedia instructions are supported... */
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int mm_support(void)
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{
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2004-12-06 00:26:43 +01:00
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int rval = 0;
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2001-07-22 16:18:56 +02:00
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int eax, ebx, ecx, edx;
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2004-12-13 17:11:38 +01:00
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int max_std_level, max_ext_level, std_caps=0, ext_caps=0;
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2004-10-17 22:27:11 +02:00
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long a, c;
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2005-12-17 19:14:38 +01:00
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2008-04-17 23:57:52 +02:00
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asm volatile (
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2008-04-16 22:51:39 +02:00
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/* See if CPUID instruction is supported ... */
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/* ... Get copies of EFLAGS into eax and ecx */
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"pushf\n\t"
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"pop %0\n\t"
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"mov %0, %1\n\t"
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2005-12-17 19:14:38 +01:00
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2008-04-16 22:51:39 +02:00
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/* ... Toggle the ID bit in one copy and store */
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/* to the EFLAGS reg */
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"xor $0x200000, %0\n\t"
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"push %0\n\t"
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"popf\n\t"
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2005-12-17 19:14:38 +01:00
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2008-04-16 22:51:39 +02:00
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/* ... Get the (hopefully modified) EFLAGS */
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"pushf\n\t"
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"pop %0\n\t"
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: "=a" (a), "=c" (c)
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:
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: "cc"
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);
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2005-12-17 19:14:38 +01:00
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2004-10-17 22:27:11 +02:00
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if (a == c)
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2001-07-22 16:18:56 +02:00
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return 0; /* CPUID not supported */
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2004-12-13 17:11:38 +01:00
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cpuid(0, max_std_level, ebx, ecx, edx);
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if(max_std_level >= 1){
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cpuid(1, eax, ebx, ecx, std_caps);
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if (std_caps & (1<<23))
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2007-06-07 19:18:01 +02:00
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rval |= FF_MM_MMX;
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2005-12-17 19:14:38 +01:00
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if (std_caps & (1<<25))
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2008-02-21 01:06:07 +01:00
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rval |= FF_MM_MMXEXT
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#if !defined(__GNUC__) || __GNUC__ > 2
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| FF_MM_SSE;
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2005-12-17 19:14:38 +01:00
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if (std_caps & (1<<26))
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2007-06-07 19:18:01 +02:00
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rval |= FF_MM_SSE2;
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2006-04-28 09:46:13 +02:00
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if (ecx & 1)
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2007-06-07 19:18:01 +02:00
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rval |= FF_MM_SSE3;
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2006-12-18 23:43:09 +01:00
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if (ecx & 0x00000200 )
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2008-02-21 01:06:07 +01:00
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rval |= FF_MM_SSSE3
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#endif
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;
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2004-12-13 17:11:38 +01:00
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}
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cpuid(0x80000000, max_ext_level, ebx, ecx, edx);
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if(max_ext_level >= 0x80000001){
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cpuid(0x80000001, eax, ebx, ecx, ext_caps);
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if (ext_caps & (1<<31))
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2007-06-07 19:18:01 +02:00
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rval |= FF_MM_3DNOW;
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2004-12-13 17:11:38 +01:00
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if (ext_caps & (1<<30))
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2007-06-07 19:18:01 +02:00
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rval |= FF_MM_3DNOWEXT;
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2004-12-13 17:11:38 +01:00
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if (ext_caps & (1<<23))
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2007-06-07 19:18:01 +02:00
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rval |= FF_MM_MMX;
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2006-04-28 09:46:13 +02:00
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if (ext_caps & (1<<22))
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2007-06-07 19:18:01 +02:00
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rval |= FF_MM_MMXEXT;
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2001-07-22 16:18:56 +02:00
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}
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2006-04-28 09:46:13 +02:00
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2004-12-13 17:11:38 +01:00
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#if 0
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2006-12-18 23:43:09 +01:00
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av_log(NULL, AV_LOG_DEBUG, "%s%s%s%s%s%s%s%s\n",
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2007-06-07 19:18:01 +02:00
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(rval&FF_MM_MMX) ? "MMX ":"",
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(rval&FF_MM_MMXEXT) ? "MMX2 ":"",
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(rval&FF_MM_SSE) ? "SSE ":"",
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(rval&FF_MM_SSE2) ? "SSE2 ":"",
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(rval&FF_MM_SSE3) ? "SSE3 ":"",
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(rval&FF_MM_SSSE3) ? "SSSE3 ":"",
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(rval&FF_MM_3DNOW) ? "3DNow ":"",
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(rval&FF_MM_3DNOWEXT) ? "3DNowExt ":"");
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2004-12-13 17:11:38 +01:00
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#endif
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return rval;
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2001-07-22 16:18:56 +02:00
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}
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2001-08-08 18:26:51 +02:00
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2007-06-07 19:19:37 +02:00
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#ifdef TEST
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2001-08-08 18:26:51 +02:00
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int main ( void )
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{
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2008-04-16 22:51:39 +02:00
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int mm_flags;
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mm_flags = mm_support();
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printf("mm_support = 0x%08X\n",mm_flags);
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return 0;
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2001-08-08 18:26:51 +02:00
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}
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#endif
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