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/*****************************************************************
* gavl - a general purpose audio/video processing library
*
* Copyright (c) 2001 - 2011 Members of the Gmerlin project
* gmerlin-general@lists.sourceforge.net
* http://gmerlin.sourceforge.net
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
* *****************************************************************/
#include <gavl.h>
#include <config.h>
#include <accel.h>
/*
* Test for available CPU extensions
* Shamelessly stolen from ffmpeg (ffmpeg.sf.net)
*/
#define ACCEL_GENERIC 0
/*
* Wrappers for foreign flag constants
*/
#define MM_MMX GAVL_ACCEL_MMX
#define MM_MMXEXT GAVL_ACCEL_MMXEXT
#define MM_SSE GAVL_ACCEL_SSE
#define MM_SSE2 GAVL_ACCEL_SSE2
#define MM_SSE3 GAVL_ACCEL_SSE3
#define MM_SSSE3 GAVL_ACCEL_SSSE3
#define MM_3DNOW GAVL_ACCEL_3DNOW
#define MM_3DNOWEXT GAVL_ACCEL_3DNOWEXT
#ifdef ARCH_X86_64
# define REG_b "rbx"
# define REG_S "rsi"
#else
# define REG_b "ebx"
# define REG_S "esi"
#endif
/* ebx saving is necessary for PIC. gcc seems unable to see it alone */
#define cpuid(index,eax,ebx,ecx,edx)\
__asm __volatile\
("mov %%"REG_b", %%"REG_S"\n\t"\
"cpuid\n\t"\
"xchg %%"REG_b", %%"REG_S\
: "=a" (eax), "=S" (ebx),\
"=c" (ecx), "=d" (edx)\
: "0" (index));
/* Function to test if multimedia instructions are supported... */
int gavl_accel_supported()
{
#ifdef ARCH_X86
int rval = 0;
int eax, ebx, ecx, edx;
int max_std_level, max_ext_level, std_caps=0, ext_caps=0;
/* any CPU that can run Debian has CPUID */
cpuid(0, max_std_level, ebx, ecx, edx);
if(max_std_level >= 1){
cpuid(1, eax, ebx, ecx, std_caps);
if (std_caps & (1<<23))
rval |= MM_MMX;
if (std_caps & (1<<25))
rval |= MM_MMXEXT | MM_SSE;
if (std_caps & (1<<26))
rval |= MM_SSE2;
if (ecx & 1)
rval |= MM_SSE3;
if (ecx & 0x00000200 )
rval |= MM_SSSE3;
}
cpuid(0x80000000, max_ext_level, ebx, ecx, edx);
if(max_ext_level >= 0x80000001){
cpuid(0x80000001, eax, ebx, ecx, ext_caps);
if (ext_caps & (1<<31))
rval |= MM_3DNOW;
if (ext_caps & (1<<30))
rval |= MM_3DNOWEXT;
if (ext_caps & (1<<23))
rval |= MM_MMX;
if (ext_caps & (1<<22))
rval |= MM_MMXEXT;
}
return rval|ACCEL_GENERIC;
#else
return ACCEL_GENERIC;
#endif
}
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