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/**
* @file libavcodec/x86/vp6dsp_mmx.c
* MMX-optimized functions for the VP6 decoder
*
* Copyright (C) 2009 Sebastien Lucas <sebastien.lucas@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/x86_cpu.h"
#include "libavcodec/dsputil.h"
#include "dsputil_mmx.h"
#include "vp6dsp_mmx.h"
#define DIAG4_MMX(in1,in2,in3,in4) \
"movq "#in1"(%0), %%mm0 \n\t" \
"movq "#in2"(%0), %%mm1 \n\t" \
"movq %%mm0, %%mm3 \n\t" \
"movq %%mm1, %%mm4 \n\t" \
"punpcklbw %%mm7, %%mm0 \n\t" \
"punpcklbw %%mm7, %%mm1 \n\t" \
"punpckhbw %%mm7, %%mm3 \n\t" \
"punpckhbw %%mm7, %%mm4 \n\t" \
"pmullw 0(%2), %%mm0 \n\t" /* src[x-8 ] * biweight [0] */ \
"pmullw 8(%2), %%mm1 \n\t" /* src[x ] * biweight [1] */ \
"pmullw 0(%2), %%mm3 \n\t" /* src[x-8 ] * biweight [0] */ \
"pmullw 8(%2), %%mm4 \n\t" /* src[x ] * biweight [1] */ \
"paddw %%mm1, %%mm0 \n\t" \
"paddw %%mm4, %%mm3 \n\t" \
"movq "#in3"(%0), %%mm1 \n\t" \
"movq "#in4"(%0), %%mm2 \n\t" \
"movq %%mm1, %%mm4 \n\t" \
"movq %%mm2, %%mm5 \n\t" \
"punpcklbw %%mm7, %%mm1 \n\t" \
"punpcklbw %%mm7, %%mm2 \n\t" \
"punpckhbw %%mm7, %%mm4 \n\t" \
"punpckhbw %%mm7, %%mm5 \n\t" \
"pmullw 16(%2), %%mm1 \n\t" /* src[x+8 ] * biweight [2] */ \
"pmullw 24(%2), %%mm2 \n\t" /* src[x+16] * biweight [3] */ \
"pmullw 16(%2), %%mm4 \n\t" /* src[x+8 ] * biweight [2] */ \
"pmullw 24(%2), %%mm5 \n\t" /* src[x+16] * biweight [3] */ \
"paddw %%mm2, %%mm1 \n\t" \
"paddw %%mm5, %%mm4 \n\t" \
"paddsw %%mm1, %%mm0 \n\t" \
"paddsw %%mm4, %%mm3 \n\t" \
"paddsw %%mm6, %%mm0 \n\t" /* Add 64 */ \
"paddsw %%mm6, %%mm3 \n\t" /* Add 64 */ \
"psraw $7, %%mm0 \n\t" \
"psraw $7, %%mm3 \n\t" \
"packuswb %%mm3, %%mm0 \n\t" \
"movq %%mm0, (%1) \n\t"
void ff_vp6_filter_diag4_mmx(uint8_t *dst, uint8_t *src, int stride,
const int16_t *h_weights, const int16_t *v_weights)
{
uint8_t tmp[8*11], *t = tmp;
int16_t weights[4*4];
int i;
src -= stride;
for (i=0; i<4*4; i++)
weights[i] = h_weights[i>>2];
__asm__ volatile(
"pxor %%mm7, %%mm7 \n\t"
"movq "MANGLE(ff_pw_64)", %%mm6 \n\t"
"1: \n\t"
DIAG4_MMX(-1,0,1,2)
"add $8, %1 \n\t"
"add %3, %0 \n\t"
"decl %4 \n\t"
"jnz 1b \n\t"
: "+r"(src), "+r"(t)
: "r"(weights), "r"((x86_reg)stride), "r"(11)
: "memory");
t = tmp + 8;
for (i=0; i<4*4; i++)
weights[i] = v_weights[i>>2];
__asm__ volatile(
"pxor %%mm7, %%mm7 \n\t"
"movq "MANGLE(ff_pw_64)", %%mm6 \n\t"
"1: \n\t"
DIAG4_MMX(-8,0,8,16)
"add $8, %0 \n\t"
"add %3, %1 \n\t"
"decl %4 \n\t"
"jnz 1b \n\t"
: "+r"(t), "+r"(dst)
: "r"(weights), "r"((x86_reg)stride), "r"(8)
: "memory");
}
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