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/*
* cpu_state.c
* Copyright (C) 2000-2002 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 "mpeg2_internal.h"
#include "attributes.h"
#ifdef ARCH_X86
#include "mmx.h"
#endif
void (* mpeg2_cpu_state_save) (cpu_state_t * state) = NULL;
void (* mpeg2_cpu_state_restore) (cpu_state_t * state) = NULL;
#ifdef ARCH_X86
static void state_restore_mmx (cpu_state_t * state)
{
emms ();
}
#endif
#ifdef ARCH_PPC
static void state_save_altivec (cpu_state_t * state)
{
asm (" \n"
" li %r9, 16 \n"
" stvx %v20, 0, %r3 \n"
" li %r11, 32 \n"
" stvx %v21, %r9, %r3 \n"
" li %r9, 48 \n"
" stvx %v22, %r11, %r3 \n"
" li %r11, 64 \n"
" stvx %v23, %r9, %r3 \n"
" li %r9, 80 \n"
" stvx %v24, %r11, %r3 \n"
" li %r11, 96 \n"
" stvx %v25, %r9, %r3 \n"
" li %r9, 112 \n"
" stvx %v26, %r11, %r3 \n"
" li %r11, 128 \n"
" stvx %v27, %r9, %r3 \n"
" li %r9, 144 \n"
" stvx %v28, %r11, %r3 \n"
" li %r11, 160 \n"
" stvx %v29, %r9, %r3 \n"
" li %r9, 176 \n"
" stvx %v30, %r11, %r3 \n"
" stvx %v31, %r9, %r3 \n"
);
}
static void state_restore_altivec (cpu_state_t * state)
{
asm (" \n"
" li %r9, 16 \n"
" lvx %v20, 0, %r3 \n"
" li %r11, 32 \n"
" lvx %v21, %r9, %r3 \n"
" li %r9, 48 \n"
" lvx %v22, %r11, %r3 \n"
" li %r11, 64 \n"
" lvx %v23, %r9, %r3 \n"
" li %r9, 80 \n"
" lvx %v24, %r11, %r3 \n"
" li %r11, 96 \n"
" lvx %v25, %r9, %r3 \n"
" li %r9, 112 \n"
" lvx %v26, %r11, %r3 \n"
" li %r11, 128 \n"
" lvx %v27, %r9, %r3 \n"
" li %r9, 144 \n"
" lvx %v28, %r11, %r3 \n"
" li %r11, 160 \n"
" lvx %v29, %r9, %r3 \n"
" li %r9, 176 \n"
" lvx %v30, %r11, %r3 \n"
" lvx %v31, %r9, %r3 \n"
);
}
#endif
void mpeg2_cpu_state_init (uint32_t accel)
{
#ifdef ARCH_X86
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
}
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