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Diffstat (limited to 'libmpeg2/cpu_state.c')
| -rw-r--r-- | libmpeg2/cpu_state.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/libmpeg2/cpu_state.c b/libmpeg2/cpu_state.c new file mode 100644 index 0000000..2f2f64a --- /dev/null +++ b/libmpeg2/cpu_state.c @@ -0,0 +1,129 @@ +/* + * cpu_state.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 "config.h" + +#include <stdlib.h> +#include <inttypes.h> + +#include "mpeg2.h" +#include "attributes.h" +#include "mpeg2_internal.h" +#if defined(ARCH_X86) || defined(ARCH_X86_64) +#include "mmx.h" +#endif + +void (* mpeg2_cpu_state_save) (cpu_state_t * state) = NULL; +void (* mpeg2_cpu_state_restore) (cpu_state_t * state) = NULL; + +#if defined(ARCH_X86) || defined(ARCH_X86_64) +static void state_restore_mmx (cpu_state_t * state) +{ + emms (); +} +#endif + +#ifdef ARCH_PPC +#if defined(__APPLE_CC__) /* apple */ +#define LI(a,b) "li r" #a "," #b "\n\t" +#define STVX0(a,b,c) "stvx v" #a ",0,r" #c "\n\t" +#define STVX(a,b,c) "stvx v" #a ",r" #b ",r" #c "\n\t" +#define LVX0(a,b,c) "lvx v" #a ",0,r" #c "\n\t" +#define LVX(a,b,c) "lvx v" #a ",r" #b ",r" #c "\n\t" +#else /* gnu */ +#define LI(a,b) "li " #a "," #b "\n\t" +#define STVX0(a,b,c) "stvx " #a ",0," #c "\n\t" +#define STVX(a,b,c) "stvx " #a "," #b "," #c "\n\t" +#define LVX0(a,b,c) "lvx " #a ",0," #c "\n\t" +#define LVX(a,b,c) "lvx " #a "," #b "," #c "\n\t" +#endif + +static void state_save_altivec (cpu_state_t * state) +{ + asm (LI (9, 16) + STVX0 (20, 0, 3) + LI (11, 32) + STVX (21, 9, 3) + LI (9, 48) + STVX (22, 11, 3) + LI (11, 64) + STVX (23, 9, 3) + LI (9, 80) + STVX (24, 11, 3) + LI (11, 96) + STVX (25, 9, 3) + LI (9, 112) + STVX (26, 11, 3) + LI (11, 128) + STVX (27, 9, 3) + LI (9, 144) + STVX (28, 11, 3) + LI (11, 160) + STVX (29, 9, 3) + LI (9, 176) + STVX (30, 11, 3) + STVX (31, 9, 3)); +} + +static void state_restore_altivec (cpu_state_t * state) +{ + asm (LI (9, 16) + LVX0 (20, 0, 3) + LI (11, 32) + LVX (21, 9, 3) + LI (9, 48) + LVX (22, 11, 3) + LI (11, 64) + LVX (23, 9, 3) + LI (9, 80) + LVX (24, 11, 3) + LI (11, 96) + LVX (25, 9, 3) + LI (9, 112) + LVX (26, 11, 3) + LI (11, 128) + LVX (27, 9, 3) + LI (9, 144) + LVX (28, 11, 3) + LI (11, 160) + LVX (29, 9, 3) + LI (9, 176) + LVX (30, 11, 3) + LVX (31, 9, 3)); +} +#endif + +void mpeg2_cpu_state_init (uint32_t accel) +{ +#if defined(ARCH_X86) || defined(ARCH_X86_64) + if (accel & MPEG2_ACCEL_X86_MMX) { + mpeg2_cpu_state_restore = state_restore_mmx; + } +#endif +#ifdef ARCH_PPC + if (accel & MPEG2_ACCEL_PPC_ALTIVEC) { + mpeg2_cpu_state_save = state_save_altivec; + mpeg2_cpu_state_restore = state_restore_altivec; + } +#endif +} |