2
* This file is part of Libav.
4
* Libav is free software; you can redistribute it and/or
5
* modify it under the terms of the GNU Lesser General Public
6
* License as published by the Free Software Foundation; either
7
* version 2.1 of the License, or (at your option) any later version.
9
* Libav is distributed in the hope that it will be useful,
10
* but WITHOUT ANY WARRANTY; without even the implied warranty of
11
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12
* Lesser General Public License for more details.
14
* You should have received a copy of the GNU Lesser General Public
15
* License along with Libav; if not, write to the Free Software
16
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25
#include "libavutil/attributes.h"
26
#include "libavutil/cpu.h"
27
#include "libavutil/ppc/cpu.h"
28
#include "libavutil/ppc/types_altivec.h"
29
#include "libavutil/ppc/util_altivec.h"
30
#include "libavcodec/mpegvideoencdsp.h"
34
static int pix_norm1_altivec(uint8_t *pix, int line_size)
37
const vector unsigned int zero =
38
(const vector unsigned int) vec_splat_u32(0);
39
vector unsigned char perm = vec_lvsl(0, pix);
40
vector unsigned int sv = (vector unsigned int) vec_splat_u32(0);
41
vector signed int sum;
43
for (i = 0; i < 16; i++) {
44
/* Read the potentially unaligned pixels. */
45
vector unsigned char pixl = vec_ld(0, pix);
46
vector unsigned char pixr = vec_ld(15, pix);
47
vector unsigned char pixv = vec_perm(pixl, pixr, perm);
49
/* Square the values, and add them to our sum. */
50
sv = vec_msum(pixv, pixv, sv);
54
/* Sum up the four partial sums, and put the result into s. */
55
sum = vec_sums((vector signed int) sv, (vector signed int) zero);
56
sum = vec_splat(sum, 3);
62
static int pix_sum_altivec(uint8_t *pix, int line_size)
65
const vector unsigned int zero =
66
(const vector unsigned int) vec_splat_u32(0);
67
vector unsigned char perm = vec_lvsl(0, pix);
68
vector unsigned int sad = (vector unsigned int) vec_splat_u32(0);
69
vector signed int sumdiffs;
71
for (i = 0; i < 16; i++) {
72
/* Read the potentially unaligned 16 pixels into t1. */
73
vector unsigned char pixl = vec_ld(0, pix);
74
vector unsigned char pixr = vec_ld(15, pix);
75
vector unsigned char t1 = vec_perm(pixl, pixr, perm);
77
/* Add each 4 pixel group together and put 4 results into sad. */
78
sad = vec_sum4s(t1, sad);
83
/* Sum up the four partial sums, and put the result into s. */
84
sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
85
sumdiffs = vec_splat(sumdiffs, 3);
86
vec_ste(sumdiffs, 0, &s);
91
#endif /* HAVE_ALTIVEC */
93
av_cold void ff_mpegvideoencdsp_init_ppc(MpegvideoEncDSPContext *c,
94
AVCodecContext *avctx)
97
if (!PPC_ALTIVEC(av_get_cpu_flags()))
100
c->pix_norm1 = pix_norm1_altivec;
101
c->pix_sum = pix_sum_altivec;
102
#endif /* HAVE_ALTIVEC */