You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
116 lines
3.2 KiB
116 lines
3.2 KiB
/* $Id$
|
|
* cpu_accel.c
|
|
* Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org>
|
|
* Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
|
|
*
|
|
* This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
|
|
* See http://libmpeg2.sourceforge.net/ for updates.
|
|
*
|
|
* mpeg2dec 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.
|
|
*
|
|
* mpeg2dec 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, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <inttypes.h>
|
|
|
|
#include "mpeg2.h"
|
|
#include "attributes.h"
|
|
#include "mpeg2_internal.h"
|
|
|
|
static inline uint32_t arch_accel( void )
|
|
{
|
|
uint32_t eax, ebx, ecx, edx;
|
|
int AMD;
|
|
uint32_t caps;
|
|
|
|
#if defined(__x86_64__) || (!defined(PIC) && !defined(__PIC__))
|
|
#define cpuid(op,eax,ebx,ecx,edx) \
|
|
__asm__ ("cpuid" \
|
|
: "=a" (eax), \
|
|
"=b" (ebx), \
|
|
"=c" (ecx), \
|
|
"=d" (edx) \
|
|
: "a" (op) \
|
|
: "cc")
|
|
#else /* PIC version : save ebx (not needed on x86_64) */
|
|
#define cpuid(op,eax,ebx,ecx,edx) \
|
|
__asm__ ("push %%ebx\n\t" \
|
|
"cpuid\n\t" \
|
|
"movl %%ebx,%1\n\t" \
|
|
"pop %%ebx" \
|
|
: "=a" (eax), \
|
|
"=r" (ebx), \
|
|
"=c" (ecx), \
|
|
"=d" (edx) \
|
|
: "a" (op) \
|
|
: "cc")
|
|
#endif
|
|
|
|
#ifndef __x86_64__ /* x86_64 supports the cpuid op */
|
|
__asm__ ("pushf\n\t"
|
|
"pushf\n\t"
|
|
"pop %0\n\t"
|
|
"movl %0,%1\n\t"
|
|
"xorl $0x200000,%0\n\t"
|
|
"push %0\n\t"
|
|
"popf\n\t"
|
|
"pushf\n\t"
|
|
"pop %0\n\t"
|
|
"popf"
|
|
: "=r" (eax),
|
|
"=r" (ebx)
|
|
:
|
|
: "cc");
|
|
|
|
if (eax == ebx) /* no cpuid */
|
|
return 0;
|
|
#endif
|
|
|
|
cpuid (0x00000000, eax, ebx, ecx, edx);
|
|
if (!eax) /* vendor string only */
|
|
return 0;
|
|
|
|
AMD = (ebx == 0x68747541) && (ecx == 0x444d4163) && (edx == 0x69746e65);
|
|
|
|
cpuid (0x00000001, eax, ebx, ecx, edx);
|
|
if (! (edx & 0x00800000)) /* no MMX */
|
|
return 0;
|
|
|
|
caps = MPEG2_ACCEL_X86_MMX;
|
|
if (edx & 0x02000000) /* SSE - identical to AMD MMX extensions */
|
|
caps = MPEG2_ACCEL_X86_MMX | MPEG2_ACCEL_X86_MMXEXT;
|
|
|
|
cpuid (0x80000000, eax, ebx, ecx, edx);
|
|
if (eax < 0x80000001) /* no extended capabilities */
|
|
return caps;
|
|
|
|
cpuid (0x80000001, eax, ebx, ecx, edx);
|
|
|
|
if (edx & 0x80000000)
|
|
caps |= MPEG2_ACCEL_X86_3DNOW;
|
|
|
|
if (AMD && (edx & 0x00400000)) /* AMD MMX extensions */
|
|
caps |= MPEG2_ACCEL_X86_MMXEXT;
|
|
|
|
return caps;
|
|
}
|
|
|
|
uint32_t mpeg2_detect_accel (void)
|
|
{
|
|
uint32_t accel;
|
|
|
|
accel = 0;
|
|
accel = arch_accel ();
|
|
|
|
return accel;
|
|
}
|
|
|