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/**
* @file libavcodec/x86/vp6dsp_mmx.c
* SSE2-optimized functions for the VP6 decoder
*
* Copyright (C) 2009 Zuxy Meng <zuxy.meng@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_sse2.h"
#define DIAG4_SSE2(in1,in2,in3,in4) \
"movq "#in1"(%0), %%xmm0 \n\t" \
"movq "#in2"(%0), %%xmm1 \n\t" \
"punpcklbw %%xmm7, %%xmm0 \n\t" \
"punpcklbw %%xmm7, %%xmm1 \n\t" \
"pmullw %%xmm4, %%xmm0 \n\t" /* src[x-8 ] * biweight [0] */ \
"pmullw %%xmm5, %%xmm1 \n\t" /* src[x ] * biweight [1] */ \
"paddw %%xmm1, %%xmm0 \n\t" \
"movq "#in3"(%0), %%xmm1 \n\t" \
"movq "#in4"(%0), %%xmm2 \n\t" \
"punpcklbw %%xmm7, %%xmm1 \n\t" \
"punpcklbw %%xmm7, %%xmm2 \n\t" \
"pmullw %%xmm6, %%xmm1 \n\t" /* src[x+8 ] * biweight [2] */ \
"pmullw %%xmm3, %%xmm2 \n\t" /* src[x+16] * biweight [3] */ \
"paddw %%xmm2, %%xmm1 \n\t" \
"paddsw %%xmm1, %%xmm0 \n\t" \
"paddsw "MANGLE(ff_pw_64)", %%xmm0 \n\t" /* Add 64 */ \
"psraw $7, %%xmm0 \n\t" \
"packuswb %%xmm0, %%xmm0 \n\t" \
"movq %%xmm0, (%1) \n\t" \
void ff_vp6_filter_diag4_sse2(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;
src -= stride;
__asm__ volatile(
"pxor %%xmm7, %%xmm7 \n\t"
"movq %4, %%xmm3 \n\t"
"pshuflw $0, %%xmm3, %%xmm4 \n\t"
"punpcklqdq %%xmm4, %%xmm4 \n\t"
"pshuflw $85, %%xmm3, %%xmm5 \n\t"
"punpcklqdq %%xmm5, %%xmm5 \n\t"
"pshuflw $170, %%xmm3, %%xmm6 \n\t"
"punpcklqdq %%xmm6, %%xmm6 \n\t"
"pshuflw $255, %%xmm3, %%xmm3 \n\t"
"punpcklqdq %%xmm3, %%xmm3 \n\t"
"1: \n\t"
DIAG4_SSE2(-1,0,1,2)
"add $8, %1 \n\t"
"add %2, %0 \n\t"
"decl %3 \n\t"
"jnz 1b \n\t"
: "+r"(src), "+r"(t)
: "g"((x86_reg)stride), "r"(11), "m"(*(const int64_t*)h_weights)
: "memory");
t = tmp + 8;
__asm__ volatile(
"movq %4, %%xmm3 \n\t"
"pshuflw $0, %%xmm3, %%xmm4 \n\t"
"punpcklqdq %%xmm4, %%xmm4 \n\t"
"pshuflw $85, %%xmm3, %%xmm5 \n\t"
"punpcklqdq %%xmm5, %%xmm5 \n\t"
"pshuflw $170, %%xmm3, %%xmm6 \n\t"
"punpcklqdq %%xmm6, %%xmm6 \n\t"
"pshuflw $255, %%xmm3, %%xmm3 \n\t"
"punpcklqdq %%xmm3, %%xmm3 \n\t"
"1: \n\t"
DIAG4_SSE2(-8,0,8,16)
"add $8, %0 \n\t"
"add %2, %1 \n\t"
"decl %3 \n\t"
"jnz 1b \n\t"
: "+r"(t), "+r"(dst)
: "g"((x86_reg)stride), "r"(8), "m"(*(const int64_t*)v_weights)
: "memory");
}
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