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dsputil_qns_template.c
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1 /*
2  * DSP utils : QNS functions are compiled 3 times for mmx/3dnow/ssse3
3  * Copyright (c) 2004 Michael Niedermayer
4  *
5  * MMX optimization by Michael Niedermayer <michaelni@gmx.at>
6  * 3DNow! and SSSE3 optimization by Zuxy Meng <zuxy.meng@gmail.com>
7  *
8  * This file is part of FFmpeg.
9  *
10  * FFmpeg is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU Lesser General Public
12  * License as published by the Free Software Foundation; either
13  * version 2.1 of the License, or (at your option) any later version.
14  *
15  * FFmpeg is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18  * Lesser General Public License for more details.
19  *
20  * You should have received a copy of the GNU Lesser General Public
21  * License along with FFmpeg; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23  */
24 
25 #define MAX_ABS (512 >> (SCALE_OFFSET>0 ? SCALE_OFFSET : 0))
26 
27 static int DEF(try_8x8basis)(int16_t rem[64], int16_t weight[64], int16_t basis[64], int scale)
28 {
29  x86_reg i=0;
30 
31  assert(FFABS(scale) < MAX_ABS);
32  scale<<= 16 + SCALE_OFFSET - BASIS_SHIFT + RECON_SHIFT;
33 
34  SET_RND(mm6);
35  __asm__ volatile(
36  "pxor %%mm7, %%mm7 \n\t"
37  "movd %4, %%mm5 \n\t"
38  "punpcklwd %%mm5, %%mm5 \n\t"
39  "punpcklwd %%mm5, %%mm5 \n\t"
40  ".p2align 4 \n\t"
41  "1: \n\t"
42  "movq (%1, %0), %%mm0 \n\t"
43  "movq 8(%1, %0), %%mm1 \n\t"
44  PMULHRW(%%mm0, %%mm1, %%mm5, %%mm6)
45  "paddw (%2, %0), %%mm0 \n\t"
46  "paddw 8(%2, %0), %%mm1 \n\t"
47  "psraw $6, %%mm0 \n\t"
48  "psraw $6, %%mm1 \n\t"
49  "pmullw (%3, %0), %%mm0 \n\t"
50  "pmullw 8(%3, %0), %%mm1 \n\t"
51  "pmaddwd %%mm0, %%mm0 \n\t"
52  "pmaddwd %%mm1, %%mm1 \n\t"
53  "paddd %%mm1, %%mm0 \n\t"
54  "psrld $4, %%mm0 \n\t"
55  "paddd %%mm0, %%mm7 \n\t"
56  "add $16, %0 \n\t"
57  "cmp $128, %0 \n\t" //FIXME optimize & bench
58  " jb 1b \n\t"
59  PHADDD(%%mm7, %%mm6)
60  "psrld $2, %%mm7 \n\t"
61  "movd %%mm7, %0 \n\t"
62 
63  : "+r" (i)
64  : "r"(basis), "r"(rem), "r"(weight), "g"(scale)
65  );
66  return i;
67 }
68 
69 static void DEF(add_8x8basis)(int16_t rem[64], int16_t basis[64], int scale)
70 {
71  x86_reg i=0;
72 
73  if(FFABS(scale) < MAX_ABS){
74  scale<<= 16 + SCALE_OFFSET - BASIS_SHIFT + RECON_SHIFT;
75  SET_RND(mm6);
76  __asm__ volatile(
77  "movd %3, %%mm5 \n\t"
78  "punpcklwd %%mm5, %%mm5 \n\t"
79  "punpcklwd %%mm5, %%mm5 \n\t"
80  ".p2align 4 \n\t"
81  "1: \n\t"
82  "movq (%1, %0), %%mm0 \n\t"
83  "movq 8(%1, %0), %%mm1 \n\t"
84  PMULHRW(%%mm0, %%mm1, %%mm5, %%mm6)
85  "paddw (%2, %0), %%mm0 \n\t"
86  "paddw 8(%2, %0), %%mm1 \n\t"
87  "movq %%mm0, (%2, %0) \n\t"
88  "movq %%mm1, 8(%2, %0) \n\t"
89  "add $16, %0 \n\t"
90  "cmp $128, %0 \n\t" // FIXME optimize & bench
91  " jb 1b \n\t"
92 
93  : "+r" (i)
94  : "r"(basis), "r"(rem), "g"(scale)
95  );
96  }else{
97  for(i=0; i<8*8; i++){
98  rem[i] += (basis[i]*scale + (1<<(BASIS_SHIFT - RECON_SHIFT-1)))>>(BASIS_SHIFT - RECON_SHIFT);
99  }
100  }
101 }