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https://github.com/mpv-player/mpv
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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@29306 b3059339-0415-0410-9bf9-f77b7e298cf2
284 lines
6.5 KiB
C
284 lines
6.5 KiB
C
/*
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* cpu_accel.c
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* Copyright (C) 2000-2004 Michel Lespinasse <walken@zoy.org>
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* Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
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*
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* This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
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* See http://libmpeg2.sourceforge.net/ for updates.
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*
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* mpeg2dec is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* mpeg2dec is distributed in the hope that it will be useful,
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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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Modified for use with MPlayer, see libmpeg2_changes.diff for the exact changes.
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* detailed changelog at http://svn.mplayerhq.hu/mplayer/trunk/
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* $Id$
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*/
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#include "config.h"
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#include <inttypes.h>
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#include "mpeg2.h"
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#include "attributes.h"
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#include "mpeg2_internal.h"
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#include "cpudetect.h"
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#if ARCH_X86 || ARCH_X86_64
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static inline uint32_t arch_accel (uint32_t accel)
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{
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/* Use MPlayer CPU detection instead of libmpeg2 variant. */
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#if 0
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if (accel & (MPEG2_ACCEL_X86_3DNOW | MPEG2_ACCEL_X86_MMXEXT))
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accel |= MPEG2_ACCEL_X86_MMX;
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if (accel & (MPEG2_ACCEL_X86_SSE2 | MPEG2_ACCEL_X86_SSE3))
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accel |= MPEG2_ACCEL_X86_MMXEXT;
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if (accel & (MPEG2_ACCEL_X86_SSE3))
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accel |= MPEG2_ACCEL_X86_SSE2;
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#ifdef ACCEL_DETECT
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if (accel & MPEG2_ACCEL_DETECT) {
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uint32_t eax, ebx, ecx, edx;
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int AMD;
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#if defined(__x86_64__) || (!defined(PIC) && !defined(__PIC__))
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#define cpuid(op,eax,ebx,ecx,edx) \
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__asm__ ("cpuid" \
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: "=a" (eax), \
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"=b" (ebx), \
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"=c" (ecx), \
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"=d" (edx) \
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: "a" (op) \
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: "cc")
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#else /* PIC version : save ebx (not needed on x86_64) */
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#define cpuid(op,eax,ebx,ecx,edx) \
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__asm__ ("pushl %%ebx\n\t" \
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"cpuid\n\t" \
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"movl %%ebx,%1\n\t" \
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"popl %%ebx" \
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: "=a" (eax), \
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"=r" (ebx), \
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"=c" (ecx), \
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"=d" (edx) \
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: "a" (op) \
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: "cc")
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#endif
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#ifndef __x86_64__ /* x86_64 supports the cpuid op */
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__asm__ ("pushf\n\t"
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"pushf\n\t"
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"pop %0\n\t"
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"movl %0,%1\n\t"
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"xorl $0x200000,%0\n\t"
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"push %0\n\t"
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"popf\n\t"
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"pushf\n\t"
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"pop %0\n\t"
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"popf"
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: "=r" (eax),
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"=r" (ebx)
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:
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: "cc");
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if (eax == ebx) /* no cpuid */
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return accel;
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#endif
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cpuid (0x00000000, eax, ebx, ecx, edx);
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if (!eax) /* vendor string only */
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return accel;
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AMD = (ebx == 0x68747541 && ecx == 0x444d4163 && edx == 0x69746e65);
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cpuid (0x00000001, eax, ebx, ecx, edx);
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if (! (edx & 0x00800000)) /* no MMX */
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return accel;
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accel |= MPEG2_ACCEL_X86_MMX;
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if (edx & 0x02000000) /* SSE - identical to AMD MMX ext. */
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accel |= MPEG2_ACCEL_X86_MMXEXT;
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if (edx & 0x04000000) /* SSE2 */
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accel |= MPEG2_ACCEL_X86_SSE2;
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if (ecx & 0x00000001) /* SSE3 */
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accel |= MPEG2_ACCEL_X86_SSE3;
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cpuid (0x80000000, eax, ebx, ecx, edx);
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if (eax < 0x80000001) /* no extended capabilities */
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return accel;
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cpuid (0x80000001, eax, ebx, ecx, edx);
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if (edx & 0x80000000)
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accel |= MPEG2_ACCEL_X86_3DNOW;
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if (AMD && (edx & 0x00400000)) /* AMD MMX extensions */
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accel |= MPEG2_ACCEL_X86_MMXEXT;
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}
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#endif /* ACCEL_DETECT */
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return accel;
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#else /* 0 */
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accel = 0;
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if (gCpuCaps.hasMMX)
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accel |= MPEG2_ACCEL_X86_MMX;
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if (gCpuCaps.hasSSE2)
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accel |= MPEG2_ACCEL_X86_SSE2;
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if (gCpuCaps.hasMMX2)
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accel |= MPEG2_ACCEL_X86_MMXEXT;
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if (gCpuCaps.has3DNow)
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accel |= MPEG2_ACCEL_X86_3DNOW;
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return accel;
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#endif /* 0 */
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}
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#endif /* ARCH_X86 || ARCH_X86_64 */
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#if defined(ACCEL_DETECT) && (ARCH_PPC || ARCH_SPARC)
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#include <signal.h>
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#include <setjmp.h>
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static sigjmp_buf jmpbuf;
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static volatile sig_atomic_t canjump = 0;
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static RETSIGTYPE sigill_handler (int sig)
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{
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if (!canjump) {
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signal (sig, SIG_DFL);
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raise (sig);
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}
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canjump = 0;
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siglongjmp (jmpbuf, 1);
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}
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#endif /* ACCEL_DETECT && (ARCH_PPC || ARCH_SPARC) */
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#if ARCH_PPC
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static uint32_t arch_accel (uint32_t accel)
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{
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#ifdef ACCEL_DETECT
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if ((accel & (MPEG2_ACCEL_PPC_ALTIVEC | MPEG2_ACCEL_DETECT)) ==
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MPEG2_ACCEL_DETECT) {
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static RETSIGTYPE (* oldsig) (int);
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oldsig = signal (SIGILL, sigill_handler);
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if (sigsetjmp (jmpbuf, 1)) {
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signal (SIGILL, oldsig);
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return accel;
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}
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canjump = 1;
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#if defined(__APPLE_CC__) /* apple */
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#define VAND(a,b,c) "vand v" #a ",v" #b ",v" #c "\n\t"
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#else /* gnu */
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#define VAND(a,b,c) "vand " #a "," #b "," #c "\n\t"
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#endif
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asm volatile ("mtspr 256, %0\n\t"
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VAND (0, 0, 0)
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:
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: "r" (-1));
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canjump = 0;
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accel |= MPEG2_ACCEL_PPC_ALTIVEC;
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signal (SIGILL, oldsig);
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}
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#endif /* ACCEL_DETECT */
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return accel;
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}
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#endif /* ARCH_PPC */
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#if ARCH_SPARC
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static uint32_t arch_accel (uint32_t accel)
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{
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if (accel & MPEG2_ACCEL_SPARC_VIS2)
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accel |= MPEG2_ACCEL_SPARC_VIS;
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#ifdef ACCEL_DETECT
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if ((accel & (MPEG2_ACCEL_SPARC_VIS2 | MPEG2_ACCEL_DETECT)) ==
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MPEG2_ACCEL_DETECT) {
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static RETSIGTYPE (* oldsig) (int);
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oldsig = signal (SIGILL, sigill_handler);
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if (sigsetjmp (jmpbuf, 1)) {
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signal (SIGILL, oldsig);
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return accel;
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}
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canjump = 1;
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/* pdist %f0, %f0, %f0 */
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__asm__ __volatile__(".word\t0x81b007c0");
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canjump = 0;
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accel |= MPEG2_ACCEL_SPARC_VIS;
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if (sigsetjmp (jmpbuf, 1)) {
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signal (SIGILL, oldsig);
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return accel;
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}
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canjump = 1;
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/* edge8n %g0, %g0, %g0 */
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__asm__ __volatile__(".word\t0x81b00020");
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canjump = 0;
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accel |= MPEG2_ACCEL_SPARC_VIS2;
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signal (SIGILL, oldsig);
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}
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#endif /* ACCEL_DETECT */
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return accel;
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}
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#endif /* ARCH_SPARC */
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#if ARCH_ALPHA
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static inline uint32_t arch_accel (uint32_t accel)
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{
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if (accel & MPEG2_ACCEL_ALPHA_MVI)
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accel |= MPEG2_ACCEL_ALPHA;
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#ifdef ACCEL_DETECT
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if (accel & MPEG2_ACCEL_DETECT) {
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uint64_t no_mvi;
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asm volatile ("amask %1, %0"
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: "=r" (no_mvi)
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: "rI" (256)); /* AMASK_MVI */
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accel |= no_mvi ? MPEG2_ACCEL_ALPHA : (MPEG2_ACCEL_ALPHA |
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MPEG2_ACCEL_ALPHA_MVI);
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}
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#endif /* ACCEL_DETECT */
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return accel;
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}
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#endif /* ARCH_ALPHA */
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uint32_t mpeg2_detect_accel (uint32_t accel)
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{
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#if ARCH_X86 || ARCH_X86_64 || ARCH_PPC || ARCH_ALPHA || ARCH_SPARC
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accel = arch_accel (accel);
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#endif
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return accel;
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}
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