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
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
|
/*
* Copyright (c) 2002 Brian Foley
* Copyright (c) 2002 Dieter Shirley
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "../dsputil.h"
#include "dsputil_altivec.h"
#if CONFIG_DARWIN
#include <sys/sysctl.h>
#endif
int pix_abs16x16_altivec(uint8_t *pix1, uint8_t *pix2, int line_size)
{
int i, s;
vector unsigned char perm1, perm2, *pix1v, *pix2v;
vector unsigned char t1, t2, t3,t4, t5;
vector unsigned int sad, zero;
vector signed int sumdiffs;
zero = (vector unsigned int) (0);
sad = (vector unsigned int) (0);
for(i=0;i<16;i++) {
/* Read potentially unaligned pixels into t1 and t2 */
perm1 = vec_lvsl(0, pix1);
pix1v = (vector unsigned char *) pix1;
perm2 = vec_lvsl(0, pix2);
pix2v = (vector unsigned char *) pix2;
t1 = vec_perm(pix1v[0], pix1v[1], perm1);
t2 = vec_perm(pix2v[0], pix2v[1], perm2);
/* Calculate a sum of abs differences vector */
t3 = vec_max(t1, t2);
t4 = vec_min(t1, t2);
t5 = vec_sub(t3, t4);
/* Add each 4 pixel group together and put 4 results into sad */
sad = vec_sum4s(t5, sad);
pix1 += line_size;
pix2 += line_size;
}
/* Sum up the four partial sums, and put the result into s */
sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
sumdiffs = vec_splat(sumdiffs, 3);
vec_ste(sumdiffs, 0, &s);
return s;
}
int pix_abs8x8_altivec(uint8_t *pix1, uint8_t *pix2, int line_size)
{
int i, s;
vector unsigned char perm1, perm2, permclear, *pix1v, *pix2v;
vector unsigned char t1, t2, t3,t4, t5;
vector unsigned int sad, zero;
vector signed int sumdiffs;
zero = (vector unsigned int) (0);
sad = (vector unsigned int) (0);
permclear = (vector unsigned char) (255,255,255,255,255,255,255,255,0,0,0,0,0,0,0,0);
for(i=0;i<8;i++) {
/* Read potentially unaligned pixels into t1 and t2
Since we're reading 16 pixels, and actually only want 8,
mask out the last 8 pixels. The 0s don't change the sum. */
perm1 = vec_lvsl(0, pix1);
pix1v = (vector unsigned char *) pix1;
perm2 = vec_lvsl(0, pix2);
pix2v = (vector unsigned char *) pix2;
t1 = vec_and(vec_perm(pix1v[0], pix1v[1], perm1), permclear);
t2 = vec_and(vec_perm(pix2v[0], pix2v[1], perm2), permclear);
/* Calculate a sum of abs differences vector */
t3 = vec_max(t1, t2);
t4 = vec_min(t1, t2);
t5 = vec_sub(t3, t4);
/* Add each 4 pixel group together and put 4 results into sad */
sad = vec_sum4s(t5, sad);
pix1 += line_size;
pix2 += line_size;
}
/* Sum up the four partial sums, and put the result into s */
sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
sumdiffs = vec_splat(sumdiffs, 3);
vec_ste(sumdiffs, 0, &s);
return s;
}
int pix_sum_altivec(UINT8 * pix, int line_size)
{
vector unsigned char perm, *pixv;
vector unsigned char t1;
vector unsigned int sad, zero;
vector signed int sumdiffs;
int s, i;
zero = (vector unsigned int) (0);
sad = (vector unsigned int) (0);
for (i = 0; i < 16; i++) {
/* Read the potentially unaligned 16 pixels into t1 */
perm = vec_lvsl(0, pix);
pixv = (vector unsigned char *) pix;
t1 = vec_perm(pixv[0], pixv[1], perm);
/* Add each 4 pixel group together and put 4 results into sad */
sad = vec_sum4s(t1, sad);
pix += line_size;
}
/* Sum up the four partial sums, and put the result into s */
sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
sumdiffs = vec_splat(sumdiffs, 3);
vec_ste(sumdiffs, 0, &s);
return s;
}
void get_pixels_altivec(DCTELEM *restrict block, const UINT8 *pixels, int line_size)
{
int i;
vector unsigned char perm, bytes, *pixv;
vector unsigned char zero = (vector unsigned char) (0);
vector signed short shorts;
for(i=0;i<8;i++)
{
// Read potentially unaligned pixels.
// We're reading 16 pixels, and actually only want 8,
// but we simply ignore the extras.
perm = vec_lvsl(0, pixels);
pixv = (vector unsigned char *) pixels;
bytes = vec_perm(pixv[0], pixv[1], perm);
// convert the bytes into shorts
shorts = (vector signed short)vec_mergeh(zero, bytes);
// save the data to the block, we assume the block is 16-byte aligned
vec_st(shorts, i*16, (vector signed short*)block);
pixels += line_size;
}
}
void diff_pixels_altivec(DCTELEM *restrict block, const UINT8 *s1,
const UINT8 *s2, int stride)
{
int i;
vector unsigned char perm, bytes, *pixv;
vector unsigned char zero = (vector unsigned char) (0);
vector signed short shorts1, shorts2;
for(i=0;i<4;i++)
{
// Read potentially unaligned pixels
// We're reading 16 pixels, and actually only want 8,
// but we simply ignore the extras.
perm = vec_lvsl(0, s1);
pixv = (vector unsigned char *) s1;
bytes = vec_perm(pixv[0], pixv[1], perm);
// convert the bytes into shorts
shorts1 = (vector signed short)vec_mergeh(zero, bytes);
// Do the same for the second block of pixels
perm = vec_lvsl(0, s2);
pixv = (vector unsigned char *) s2;
bytes = vec_perm(pixv[0], pixv[1], perm);
// convert the bytes into shorts
shorts2 = (vector signed short)vec_mergeh(zero, bytes);
// Do the subtraction
shorts1 = vec_sub(shorts1, shorts2);
// save the data to the block, we assume the block is 16-byte aligned
vec_st(shorts1, 0, (vector signed short*)block);
s1 += stride;
s2 += stride;
block += 8;
// The code below is a copy of the code above... This is a manual
// unroll.
// Read potentially unaligned pixels
// We're reading 16 pixels, and actually only want 8,
// but we simply ignore the extras.
perm = vec_lvsl(0, s1);
pixv = (vector unsigned char *) s1;
bytes = vec_perm(pixv[0], pixv[1], perm);
// convert the bytes into shorts
shorts1 = (vector signed short)vec_mergeh(zero, bytes);
// Do the same for the second block of pixels
perm = vec_lvsl(0, s2);
pixv = (vector unsigned char *) s2;
bytes = vec_perm(pixv[0], pixv[1], perm);
// convert the bytes into shorts
shorts2 = (vector signed short)vec_mergeh(zero, bytes);
// Do the subtraction
shorts1 = vec_sub(shorts1, shorts2);
// save the data to the block, we assume the block is 16-byte aligned
vec_st(shorts1, 0, (vector signed short*)block);
s1 += stride;
s2 += stride;
block += 8;
}
}
int has_altivec(void)
{
#if CONFIG_DARWIN
int sels[2] = {CTL_HW, HW_VECTORUNIT};
int has_vu = 0;
size_t len = sizeof(has_vu);
int err;
err = sysctl(sels, 2, &has_vu, &len, NULL, 0);
if (err == 0) return (has_vu != 0);
#endif
return 0;
}
|
