ffmpeg / libavcodec / x86 / dsputil_mmx_qns_template.c @ b1c32fb5
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/*


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* DSP utils : QNS functions are compiled 3 times for mmx/3dnow/ssse3

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* Copyright (c) 2004 Michael Niedermayer

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*

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* MMX optimization by Michael Niedermayer <michaelni@gmx.at>

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* 3DNow! and SSSE3 optimization by Zuxy Meng <zuxy.meng@gmail.com>

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*

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* This file is part of FFmpeg.

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*

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* FFmpeg is free software; you can redistribute it and/or

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* modify it under the terms of the GNU Lesser General Public

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* License as published by the Free Software Foundation; either

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* version 2.1 of the License, or (at your option) any later version.

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*

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* FFmpeg 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 GNU

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* Lesser General Public License for more details.

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*

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* You should have received a copy of the GNU Lesser General Public

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* License along with FFmpeg; if not, write to the Free Software

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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 021101301 USA

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*/

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#define MAX_ABS (512 >> (SCALE_OFFSET>0 ? SCALE_OFFSET : 0)) 
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static int DEF(try_8x8basis)(int16_t rem[64], int16_t weight[64], int16_t basis[64], int scale) 
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{ 
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x86_reg i=0;

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assert(FFABS(scale) < MAX_ABS); 
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scale<<= 16 + SCALE_OFFSET  BASIS_SHIFT + RECON_SHIFT;

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SET_RND(mm6); 
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__asm__ volatile(

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"pxor %%mm7, %%mm7 \n\t"

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"movd %4, %%mm5 \n\t"

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"punpcklwd %%mm5, %%mm5 \n\t"

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"punpcklwd %%mm5, %%mm5 \n\t"

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ASMALIGN(4)

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"1: \n\t"

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"movq (%1, %0), %%mm0 \n\t"

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"movq 8(%1, %0), %%mm1 \n\t"

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PMULHRW(%%mm0, %%mm1, %%mm5, %%mm6) 
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"paddw (%2, %0), %%mm0 \n\t"

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"paddw 8(%2, %0), %%mm1 \n\t"

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"psraw $6, %%mm0 \n\t"

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"psraw $6, %%mm1 \n\t"

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"pmullw (%3, %0), %%mm0 \n\t"

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"pmullw 8(%3, %0), %%mm1 \n\t"

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"pmaddwd %%mm0, %%mm0 \n\t"

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"pmaddwd %%mm1, %%mm1 \n\t"

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"paddd %%mm1, %%mm0 \n\t"

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"psrld $4, %%mm0 \n\t"

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"paddd %%mm0, %%mm7 \n\t"

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"add $16, %0 \n\t"

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"cmp $128, %0 \n\t" //FIXME optimize & bench 
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" jb 1b \n\t"

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PHADDD(%%mm7, %%mm6) 
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"psrld $2, %%mm7 \n\t"

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"movd %%mm7, %0 \n\t"

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: "+r" (i)

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: "r"(basis), "r"(rem), "r"(weight), "g"(scale) 
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); 
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return i;

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} 
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static void DEF(add_8x8basis)(int16_t rem[64], int16_t basis[64], int scale) 
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{ 
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x86_reg i=0;

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if(FFABS(scale) < MAX_ABS){

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scale<<= 16 + SCALE_OFFSET  BASIS_SHIFT + RECON_SHIFT;

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SET_RND(mm6); 
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__asm__ volatile(

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"movd %3, %%mm5 \n\t"

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"punpcklwd %%mm5, %%mm5 \n\t"

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"punpcklwd %%mm5, %%mm5 \n\t"

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ASMALIGN(4)

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"1: \n\t"

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"movq (%1, %0), %%mm0 \n\t"

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"movq 8(%1, %0), %%mm1 \n\t"

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PMULHRW(%%mm0, %%mm1, %%mm5, %%mm6) 
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"paddw (%2, %0), %%mm0 \n\t"

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"paddw 8(%2, %0), %%mm1 \n\t"

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"movq %%mm0, (%2, %0) \n\t"

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"movq %%mm1, 8(%2, %0) \n\t"

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"add $16, %0 \n\t"

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"cmp $128, %0 \n\t" // FIXME optimize & bench 
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" jb 1b \n\t"

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: "+r" (i)

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: "r"(basis), "r"(rem), "g"(scale) 
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); 
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}else{

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for(i=0; i<8*8; i++){ 
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rem[i] += (basis[i]*scale + (1<<(BASIS_SHIFT  RECON_SHIFT1)))>>(BASIS_SHIFT  RECON_SHIFT); 
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} 
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} 
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} 