1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
/*
* Copyright (c) 2007 Luca Barbato <lu_zero@gentoo.org>
*
* 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
*/
/**
** @file int_altivec.c
** integer misc ops.
**/
#include "libavcodec/dsputil.h"
#include "gcc_fixes.h"
#include "dsputil_altivec.h"
#include "types_altivec.h"
static int ssd_int8_vs_int16_altivec(const int8_t *pix1, const int16_t *pix2,
int size) {
int i, size16;
vector signed char vpix1;
vector signed short vpix2, vdiff, vpix1l,vpix1h;
union { vector signed int vscore;
int32_t score[4];
} u;
u.vscore = vec_splat_s32(0);
//
//XXX lazy way, fix it later
#define vec_unaligned_load(b) \
vec_perm(vec_ld(0,b),vec_ld(15,b),vec_lvsl(0, b));
size16 = size >> 4;
while(size16) {
// score += (pix1[i]-pix2[i])*(pix1[i]-pix2[i]);
//load pix1 and the first batch of pix2
vpix1 = vec_unaligned_load(pix1);
vpix2 = vec_unaligned_load(pix2);
pix2 += 8;
//unpack
vpix1h = vec_unpackh(vpix1);
vdiff = vec_sub(vpix1h, vpix2);
vpix1l = vec_unpackl(vpix1);
// load another batch from pix2
vpix2 = vec_unaligned_load(pix2);
u.vscore = vec_msum(vdiff, vdiff, u.vscore);
vdiff = vec_sub(vpix1l, vpix2);
u.vscore = vec_msum(vdiff, vdiff, u.vscore);
pix1 += 16;
pix2 += 8;
size16--;
}
u.vscore = vec_sums(u.vscore, vec_splat_s32(0));
size %= 16;
for (i = 0; i < size; i++) {
u.score[3] += (pix1[i]-pix2[i])*(pix1[i]-pix2[i]);
}
return u.score[3];
}
static void add_int16_altivec(int16_t * v1, int16_t * v2, int order)
{
int i;
register vec_s16_t vec, *pv;
for(i = 0; i < order; i += 8){
pv = (vec_s16_t*)v2;
vec = vec_perm(pv[0], pv[1], vec_lvsl(0, v2));
vec_st(vec_add(vec_ld(0, v1), vec), 0, v1);
v1 += 8;
v2 += 8;
}
}
static void sub_int16_altivec(int16_t * v1, int16_t * v2, int order)
{
int i;
register vec_s16_t vec, *pv;
for(i = 0; i < order; i += 8){
pv = (vec_s16_t*)v2;
vec = vec_perm(pv[0], pv[1], vec_lvsl(0, v2));
vec_st(vec_sub(vec_ld(0, v1), vec), 0, v1);
v1 += 8;
v2 += 8;
}
}
static int32_t scalarproduct_int16_altivec(int16_t * v1, int16_t * v2, int order, const int shift)
{
int i;
LOAD_ZERO;
register vec_s16_t vec1, *pv;
register vec_s32_t res = vec_splat_s32(0), t;
register vec_u32_t shifts;
DECLARE_ALIGNED_16(int32_t, ires);
shifts = zero_u32v;
if(shift & 0x10) shifts = vec_add(shifts, vec_sl(vec_splat_u32(0x08), vec_splat_u32(0x1)));
if(shift & 0x08) shifts = vec_add(shifts, vec_splat_u32(0x08));
if(shift & 0x04) shifts = vec_add(shifts, vec_splat_u32(0x04));
if(shift & 0x02) shifts = vec_add(shifts, vec_splat_u32(0x02));
if(shift & 0x01) shifts = vec_add(shifts, vec_splat_u32(0x01));
for(i = 0; i < order; i += 8){
pv = (vec_s16_t*)v1;
vec1 = vec_perm(pv[0], pv[1], vec_lvsl(0, v1));
t = vec_msum(vec1, vec_ld(0, v2), zero_s32v);
t = vec_sr(t, shifts);
res = vec_sums(t, res);
v1 += 8;
v2 += 8;
}
res = vec_splat(res, 3);
vec_ste(res, 0, &ires);
return ires;
}
void int_init_altivec(DSPContext* c, AVCodecContext *avctx)
{
c->ssd_int8_vs_int16 = ssd_int8_vs_int16_altivec;
c->add_int16 = add_int16_altivec;
c->sub_int16 = sub_int16_altivec;
c->scalarproduct_int16 = scalarproduct_int16_altivec;
}
|
