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129 lines
3.1 KiB
129 lines
3.1 KiB
/*
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* cpu_state.c
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* Copyright (C) 2000-2003 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "config.h"
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#include "k9common.h"
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#include <stdlib.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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#ifdef ARCH_X86
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#include "mmx.h"
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#endif
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void (* mpeg2_cpu_state_save) (cpu_state_t * state) = NULL;
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void (* mpeg2_cpu_state_restore) (cpu_state_t * state) = NULL;
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#ifdef ARCH_X86
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static void state_restore_mmx (cpu_state_t * state)
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{
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emms ();
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}
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#endif
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#ifdef ARCH_PPC
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#ifdef HAVE_ALTIVEC_H /* gnu */
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#define LI(a,b) "li " #a "," #b "\n\t"
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#define STVX0(a,b,c) "stvx " #a ",0," #c "\n\t"
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#define STVX(a,b,c) "stvx " #a "," #b "," #c "\n\t"
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#define LVX0(a,b,c) "lvx " #a ",0," #c "\n\t"
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#define LVX(a,b,c) "lvx " #a "," #b "," #c "\n\t"
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#else /* apple */
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#define LI(a,b) "li r" #a "," #b "\n\t"
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#define STVX0(a,b,c) "stvx v" #a ",0,r" #c "\n\t"
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#define STVX(a,b,c) "stvx v" #a ",r" #b ",r" #c "\n\t"
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#define LVX0(a,b,c) "lvx v" #a ",0,r" #c "\n\t"
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#define LVX(a,b,c) "lvx v" #a ",r" #b ",r" #c "\n\t"
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#endif
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static void state_save_altivec (cpu_state_t * state)
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{
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asm (LI (9, 16)
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STVX0 (20, 0, 3)
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LI (11, 32)
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STVX (21, 9, 3)
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LI (9, 48)
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STVX (22, 11, 3)
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LI (11, 64)
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STVX (23, 9, 3)
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LI (9, 80)
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STVX (24, 11, 3)
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LI (11, 96)
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STVX (25, 9, 3)
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LI (9, 112)
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STVX (26, 11, 3)
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LI (11, 128)
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STVX (27, 9, 3)
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LI (9, 144)
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STVX (28, 11, 3)
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LI (11, 160)
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STVX (29, 9, 3)
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LI (9, 176)
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STVX (30, 11, 3)
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STVX (31, 9, 3));
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}
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static void state_restore_altivec (cpu_state_t * state)
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{
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asm (LI (9, 16)
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LVX0 (20, 0, 3)
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LI (11, 32)
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LVX (21, 9, 3)
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LI (9, 48)
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LVX (22, 11, 3)
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LI (11, 64)
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LVX (23, 9, 3)
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LI (9, 80)
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LVX (24, 11, 3)
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LI (11, 96)
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LVX (25, 9, 3)
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LI (9, 112)
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LVX (26, 11, 3)
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LI (11, 128)
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LVX (27, 9, 3)
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LI (9, 144)
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LVX (28, 11, 3)
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LI (11, 160)
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LVX (29, 9, 3)
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LI (9, 176)
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LVX (30, 11, 3)
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LVX (31, 9, 3));
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}
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#endif
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void mpeg2_cpu_state_init (uint32_t accel)
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{
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#ifdef ARCH_X86
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if (accel & MPEG2_ACCEL_X86_MMX) {
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mpeg2_cpu_state_restore = state_restore_mmx;
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}
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#endif
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#ifdef ARCH_PPC
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if (accel & MPEG2_ACCEL_PPC_ALTIVEC) {
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mpeg2_cpu_state_save = state_save_altivec;
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mpeg2_cpu_state_restore = state_restore_altivec;
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}
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#endif
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}
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