RepoMirrors
/
mpv
mirror of https://github.com/mpv-player/mpv
1
0
Fork 0
Code Issues Releases Wiki Activity
mpv/libmpeg2/cpu_accel.c

284 lines
6.5 KiB
C
Raw Blame History

/*
* cpu_accel.c
* Copyright (C) 2000-2004 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
*
* Modified for use with MPlayer, see libmpeg2_changes.diff for the exact changes.
* detailed changelog at http://svn.mplayerhq.hu/mplayer/trunk/
* $Id$
*/
#include "config.h"
#include <inttypes.h>
#include "mpeg2.h"
#include "attributes.h"
#include "mpeg2_internal.h"
#include "cpudetect.h"
#if ARCH_X86 || ARCH_X86_64
static inline uint32_t arch_accel (uint32_t accel)
{
/* Use MPlayer CPU detection instead of libmpeg2 variant. */
#if 0
if (accel & (MPEG2_ACCEL_X86_3DNOW | MPEG2_ACCEL_X86_MMXEXT))
accel |= MPEG2_ACCEL_X86_MMX;
if (accel & (MPEG2_ACCEL_X86_SSE2 | MPEG2_ACCEL_X86_SSE3))
accel |= MPEG2_ACCEL_X86_MMXEXT;
if (accel & (MPEG2_ACCEL_X86_SSE3))
accel |= MPEG2_ACCEL_X86_SSE2;
#ifdef ACCEL_DETECT
if (accel & MPEG2_ACCEL_DETECT) {
uint32_t eax, ebx, ecx, edx;
int AMD;
#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__ ("pushl %%ebx\n\t" \
"cpuid\n\t" \
"movl %%ebx,%1\n\t" \
"popl %%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 accel;
#endif
cpuid (0x00000000, eax, ebx, ecx, edx);
if (!eax) /* vendor string only */
return accel;
AMD = (ebx == 0x68747541 && ecx == 0x444d4163 && edx == 0x69746e65);
cpuid (0x00000001, eax, ebx, ecx, edx);
if (! (edx & 0x00800000)) /* no MMX */
return accel;
accel |= MPEG2_ACCEL_X86_MMX;
if (edx & 0x02000000) /* SSE - identical to AMD MMX ext. */
accel |= MPEG2_ACCEL_X86_MMXEXT;
if (edx & 0x04000000) /* SSE2 */
accel |= MPEG2_ACCEL_X86_SSE2;
if (ecx & 0x00000001) /* SSE3 */
accel |= MPEG2_ACCEL_X86_SSE3;
cpuid (0x80000000, eax, ebx, ecx, edx);
if (eax < 0x80000001) /* no extended capabilities */
return accel;
cpuid (0x80000001, eax, ebx, ecx, edx);
if (edx & 0x80000000)
accel |= MPEG2_ACCEL_X86_3DNOW;
if (AMD && (edx & 0x00400000)) /* AMD MMX extensions */
accel |= MPEG2_ACCEL_X86_MMXEXT;
}
#endif /* ACCEL_DETECT */
return accel;
#else /* 0 */
accel = 0;
if (gCpuCaps.hasMMX)
accel |= MPEG2_ACCEL_X86_MMX;
if (gCpuCaps.hasSSE2)
accel |= MPEG2_ACCEL_X86_SSE2;
if (gCpuCaps.hasMMX2)
accel |= MPEG2_ACCEL_X86_MMXEXT;
if (gCpuCaps.has3DNow)
accel |= MPEG2_ACCEL_X86_3DNOW;
return accel;
#endif /* 0 */
}
#endif /* ARCH_X86 || ARCH_X86_64 */
#if defined(ACCEL_DETECT) && (ARCH_PPC || ARCH_SPARC)
#include <signal.h>
#include <setjmp.h>
static sigjmp_buf jmpbuf;
static volatile sig_atomic_t canjump = 0;
static RETSIGTYPE sigill_handler (int sig)
{
if (!canjump) {
signal (sig, SIG_DFL);
raise (sig);
}
canjump = 0;
siglongjmp (jmpbuf, 1);
}
#endif /* ACCEL_DETECT && (ARCH_PPC || ARCH_SPARC) */
#if ARCH_PPC
static uint32_t arch_accel (uint32_t accel)
{
#ifdef ACCEL_DETECT
if ((accel & (MPEG2_ACCEL_PPC_ALTIVEC | MPEG2_ACCEL_DETECT)) ==
MPEG2_ACCEL_DETECT) {
static RETSIGTYPE (* oldsig) (int);
oldsig = signal (SIGILL, sigill_handler);
if (sigsetjmp (jmpbuf, 1)) {
signal (SIGILL, oldsig);
return accel;
}
canjump = 1;
#if defined(__APPLE_CC__) /* apple */
#define VAND(a,b,c) "vand v" #a ",v" #b ",v" #c "\n\t"
#else /* gnu */
#define VAND(a,b,c) "vand " #a "," #b "," #c "\n\t"
#endif
asm volatile ("mtspr 256, %0\n\t"
VAND (0, 0, 0)
:
: "r" (-1));
canjump = 0;
accel |= MPEG2_ACCEL_PPC_ALTIVEC;
signal (SIGILL, oldsig);
}
#endif /* ACCEL_DETECT */
return accel;
}
#endif /* ARCH_PPC */
#if ARCH_SPARC
static uint32_t arch_accel (uint32_t accel)
{
if (accel & MPEG2_ACCEL_SPARC_VIS2)
accel |= MPEG2_ACCEL_SPARC_VIS;
#ifdef ACCEL_DETECT
if ((accel & (MPEG2_ACCEL_SPARC_VIS2 | MPEG2_ACCEL_DETECT)) ==
MPEG2_ACCEL_DETECT) {
static RETSIGTYPE (* oldsig) (int);
oldsig = signal (SIGILL, sigill_handler);
if (sigsetjmp (jmpbuf, 1)) {
signal (SIGILL, oldsig);
return accel;
}
canjump = 1;
/* pdist %f0, %f0, %f0 */
__asm__ __volatile__(".word\t0x81b007c0");
canjump = 0;
accel |= MPEG2_ACCEL_SPARC_VIS;
if (sigsetjmp (jmpbuf, 1)) {
signal (SIGILL, oldsig);
return accel;
}
canjump = 1;
/* edge8n %g0, %g0, %g0 */
__asm__ __volatile__(".word\t0x81b00020");
canjump = 0;
accel |= MPEG2_ACCEL_SPARC_VIS2;
signal (SIGILL, oldsig);
}
#endif /* ACCEL_DETECT */
return accel;
}
#endif /* ARCH_SPARC */
#if ARCH_ALPHA
static inline uint32_t arch_accel (uint32_t accel)
{
if (accel & MPEG2_ACCEL_ALPHA_MVI)
accel |= MPEG2_ACCEL_ALPHA;
#ifdef ACCEL_DETECT
if (accel & MPEG2_ACCEL_DETECT) {
uint64_t no_mvi;
asm volatile ("amask %1, %0"
: "=r" (no_mvi)
: "rI" (256)); /* AMASK_MVI */
accel |= no_mvi ? MPEG2_ACCEL_ALPHA : (MPEG2_ACCEL_ALPHA |
MPEG2_ACCEL_ALPHA_MVI);
}
#endif /* ACCEL_DETECT */
return accel;
}
#endif /* ARCH_ALPHA */
uint32_t mpeg2_detect_accel (uint32_t accel)
{
#if ARCH_X86 || ARCH_X86_64 || ARCH_PPC || ARCH_ALPHA || ARCH_SPARC
accel = arch_accel (accel);
#endif
return accel;
}
Reference in New Issue View Git Blame Copy Permalink