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mpegvideoenc_qns_template.c
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1 /*
2  * 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 #include <stdint.h>
26 
27 #include "libavutil/avassert.h"
28 #include "libavutil/common.h"
29 #include "libavutil/x86/asm.h"
30 
31 #include "inline_asm.h"
32 
33 #define MAX_ABS (512 >> (SCALE_OFFSET>0 ? SCALE_OFFSET : 0))
34 
35 static int DEF(try_8x8basis)(int16_t rem[64], int16_t weight[64], int16_t basis[64], int scale)
36 {
37  x86_reg i=0;
38 
39  av_assert2(FFABS(scale) < MAX_ABS);
40  scale<<= 16 + SCALE_OFFSET - BASIS_SHIFT + RECON_SHIFT;
41 
42  SET_RND(mm6);
43  __asm__ volatile(
44  "pxor %%mm7, %%mm7 \n\t"
45  "movd %4, %%mm5 \n\t"
46  "punpcklwd %%mm5, %%mm5 \n\t"
47  "punpcklwd %%mm5, %%mm5 \n\t"
48  ".p2align 4 \n\t"
49  "1: \n\t"
50  "movq (%1, %0), %%mm0 \n\t"
51  "movq 8(%1, %0), %%mm1 \n\t"
52  PMULHRW(%%mm0, %%mm1, %%mm5, %%mm6)
53  "paddw (%2, %0), %%mm0 \n\t"
54  "paddw 8(%2, %0), %%mm1 \n\t"
55  "psraw $6, %%mm0 \n\t"
56  "psraw $6, %%mm1 \n\t"
57  "pmullw (%3, %0), %%mm0 \n\t"
58  "pmullw 8(%3, %0), %%mm1 \n\t"
59  "pmaddwd %%mm0, %%mm0 \n\t"
60  "pmaddwd %%mm1, %%mm1 \n\t"
61  "paddd %%mm1, %%mm0 \n\t"
62  "psrld $4, %%mm0 \n\t"
63  "paddd %%mm0, %%mm7 \n\t"
64  "add $16, %0 \n\t"
65  "cmp $128, %0 \n\t" //FIXME optimize & bench
66  " jb 1b \n\t"
67  PHADDD(%%mm7, %%mm6)
68  "psrld $2, %%mm7 \n\t"
69  "movd %%mm7, %0 \n\t"
70 
71  : "+r" (i)
72  : "r"(basis), "r"(rem), "r"(weight), "g"(scale)
73  );
74  return i;
75 }
76 
77 static void DEF(add_8x8basis)(int16_t rem[64], int16_t basis[64], int scale)
78 {
79  x86_reg i=0;
80 
81  if(FFABS(scale) < MAX_ABS){
82  scale<<= 16 + SCALE_OFFSET - BASIS_SHIFT + RECON_SHIFT;
83  SET_RND(mm6);
84  __asm__ volatile(
85  "movd %3, %%mm5 \n\t"
86  "punpcklwd %%mm5, %%mm5 \n\t"
87  "punpcklwd %%mm5, %%mm5 \n\t"
88  ".p2align 4 \n\t"
89  "1: \n\t"
90  "movq (%1, %0), %%mm0 \n\t"
91  "movq 8(%1, %0), %%mm1 \n\t"
92  PMULHRW(%%mm0, %%mm1, %%mm5, %%mm6)
93  "paddw (%2, %0), %%mm0 \n\t"
94  "paddw 8(%2, %0), %%mm1 \n\t"
95  "movq %%mm0, (%2, %0) \n\t"
96  "movq %%mm1, 8(%2, %0) \n\t"
97  "add $16, %0 \n\t"
98  "cmp $128, %0 \n\t" // FIXME optimize & bench
99  " jb 1b \n\t"
100 
101  : "+r" (i)
102  : "r"(basis), "r"(rem), "g"(scale)
103  );
104  }else{
105  for(i=0; i<8*8; i++){
106  rem[i] += (basis[i]*scale + (1<<(BASIS_SHIFT - RECON_SHIFT-1)))>>(BASIS_SHIFT - RECON_SHIFT);
107  }
108  }
109 }
#define RECON_SHIFT
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:64
#define DEF(type, name, bytes, read, write)
Definition: bytestream.h:42
#define MAX_ABS
simple assert() macros that are a bit more flexible than ISO C assert().
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
static int weight(int i, int blen, int offset)
Definition: diracdec.c:1530
#define BASIS_SHIFT
common internal and external API header
static int16_t basis[64][64]
int x86_reg
Definition: asm.h:72