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libavcodec/x86/dsputil_mmx_qns_template.c

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00001 /*
00002  * DSP utils : QNS functions are compiled 3 times for mmx/3dnow/ssse3
00003  * Copyright (c) 2004 Michael Niedermayer
00004  *
00005  * MMX optimization by Michael Niedermayer <michaelni@gmx.at>
00006  * 3DNow! and SSSE3 optimization by Zuxy Meng <zuxy.meng@gmail.com>
00007  *
00008  * This file is part of FFmpeg.
00009  *
00010  * FFmpeg is free software; you can redistribute it and/or
00011  * modify it under the terms of the GNU Lesser General Public
00012  * License as published by the Free Software Foundation; either
00013  * version 2.1 of the License, or (at your option) any later version.
00014  *
00015  * FFmpeg is distributed in the hope that it will be useful,
00016  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00017  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00018  * Lesser General Public License for more details.
00019  *
00020  * You should have received a copy of the GNU Lesser General Public
00021  * License along with FFmpeg; if not, write to the Free Software
00022  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00023  */
00024 
00025 #define MAX_ABS (512 >> (SCALE_OFFSET>0 ? SCALE_OFFSET : 0))
00026 
00027 static int DEF(try_8x8basis)(int16_t rem[64], int16_t weight[64], int16_t basis[64], int scale)
00028 {
00029     x86_reg i=0;
00030 
00031     assert(FFABS(scale) < MAX_ABS);
00032     scale<<= 16 + SCALE_OFFSET - BASIS_SHIFT + RECON_SHIFT;
00033 
00034     SET_RND(mm6);
00035     __asm__ volatile(
00036         "pxor %%mm7, %%mm7              \n\t"
00037         "movd  %4, %%mm5                \n\t"
00038         "punpcklwd %%mm5, %%mm5         \n\t"
00039         "punpcklwd %%mm5, %%mm5         \n\t"
00040         ASMALIGN(4)
00041         "1:                             \n\t"
00042         "movq  (%1, %0), %%mm0          \n\t"
00043         "movq  8(%1, %0), %%mm1         \n\t"
00044         PMULHRW(%%mm0, %%mm1, %%mm5, %%mm6)
00045         "paddw (%2, %0), %%mm0          \n\t"
00046         "paddw 8(%2, %0), %%mm1         \n\t"
00047         "psraw $6, %%mm0                \n\t"
00048         "psraw $6, %%mm1                \n\t"
00049         "pmullw (%3, %0), %%mm0         \n\t"
00050         "pmullw 8(%3, %0), %%mm1        \n\t"
00051         "pmaddwd %%mm0, %%mm0           \n\t"
00052         "pmaddwd %%mm1, %%mm1           \n\t"
00053         "paddd %%mm1, %%mm0             \n\t"
00054         "psrld $4, %%mm0                \n\t"
00055         "paddd %%mm0, %%mm7             \n\t"
00056         "add $16, %0                    \n\t"
00057         "cmp $128, %0                   \n\t" //FIXME optimize & bench
00058         " jb 1b                         \n\t"
00059         PHADDD(%%mm7, %%mm6)
00060         "psrld $2, %%mm7                \n\t"
00061         "movd %%mm7, %0                 \n\t"
00062 
00063         : "+r" (i)
00064         : "r"(basis), "r"(rem), "r"(weight), "g"(scale)
00065     );
00066     return i;
00067 }
00068 
00069 static void DEF(add_8x8basis)(int16_t rem[64], int16_t basis[64], int scale)
00070 {
00071     x86_reg i=0;
00072 
00073     if(FFABS(scale) < MAX_ABS){
00074         scale<<= 16 + SCALE_OFFSET - BASIS_SHIFT + RECON_SHIFT;
00075         SET_RND(mm6);
00076         __asm__ volatile(
00077                 "movd  %3, %%mm5        \n\t"
00078                 "punpcklwd %%mm5, %%mm5 \n\t"
00079                 "punpcklwd %%mm5, %%mm5 \n\t"
00080                 ASMALIGN(4)
00081                 "1:                     \n\t"
00082                 "movq  (%1, %0), %%mm0  \n\t"
00083                 "movq  8(%1, %0), %%mm1 \n\t"
00084                 PMULHRW(%%mm0, %%mm1, %%mm5, %%mm6)
00085                 "paddw (%2, %0), %%mm0  \n\t"
00086                 "paddw 8(%2, %0), %%mm1 \n\t"
00087                 "movq %%mm0, (%2, %0)   \n\t"
00088                 "movq %%mm1, 8(%2, %0)  \n\t"
00089                 "add $16, %0            \n\t"
00090                 "cmp $128, %0           \n\t" // FIXME optimize & bench
00091                 " jb 1b                 \n\t"
00092 
00093                 : "+r" (i)
00094                 : "r"(basis), "r"(rem), "g"(scale)
00095         );
00096     }else{
00097         for(i=0; i<8*8; i++){
00098             rem[i] += (basis[i]*scale + (1<<(BASIS_SHIFT - RECON_SHIFT-1)))>>(BASIS_SHIFT - RECON_SHIFT);
00099         }
00100     }
00101 }

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