2 * Copyright (c) 2006 Luca Barbato <lu_zero@gentoo.org>
4 * This file is part of Libav.
6 * Libav is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * Libav is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "libavutil/ppc/util_altivec.h"
22 #include "libavcodec/dsputil.h"
24 #include "dsputil_altivec.h"
26 static void vector_fmul_reverse_altivec(float *dst, const float *src0,
27 const float *src1, int len)
30 vector float d, s0, s1, h0, l0,
31 s2, s3, zero = (vector float)vec_splat_u32(0);
33 for(i=0; i<len-7; i+=8) {
34 s1 = vec_ld(0, src1-i); // [a,b,c,d]
35 s0 = vec_ld(0, src0+i);
36 l0 = vec_mergel(s1, s1); // [c,c,d,d]
37 s3 = vec_ld(-16, src1-i);
38 h0 = vec_mergeh(s1, s1); // [a,a,b,b]
39 s2 = vec_ld(16, src0+i);
40 s1 = vec_mergeh(vec_mergel(l0,h0), // [d,b,d,b]
41 vec_mergeh(l0,h0)); // [c,a,c,a]
43 l0 = vec_mergel(s3, s3);
44 d = vec_madd(s0, s1, zero);
45 h0 = vec_mergeh(s3, s3);
47 s3 = vec_mergeh(vec_mergel(l0,h0),
49 d = vec_madd(s2, s3, zero);
54 static void vector_fmul_add_altivec(float *dst, const float *src0,
55 const float *src1, const float *src2,
59 vector float d, s0, s1, s2, t0, t1, edges;
60 vector unsigned char align = vec_lvsr(0,dst),
61 mask = vec_lvsl(0, dst);
63 for (i=0; i<len-3; i+=4) {
64 t0 = vec_ld(0, dst+i);
65 t1 = vec_ld(15, dst+i);
66 s0 = vec_ld(0, src0+i);
67 s1 = vec_ld(0, src1+i);
68 s2 = vec_ld(0, src2+i);
69 edges = vec_perm(t1 ,t0, mask);
70 d = vec_madd(s0,s1,s2);
71 t1 = vec_perm(d, edges, align);
72 t0 = vec_perm(edges, d, align);
73 vec_st(t1, 15, dst+i);
78 static void vector_fmul_window_altivec(float *dst, const float *src0, const float *src1, const float *win, int len)
80 vector float zero, t0, t1, s0, s1, wi, wj;
81 const vector unsigned char reverse = vcprm(3,2,1,0);
88 zero = (vector float)vec_splat_u32(0);
90 for(i=-len*4, j=len*4-16; i<0; i+=16, j-=16) {
96 s1 = vec_perm(s1, s1, reverse);
97 wj = vec_perm(wj, wj, reverse);
99 t0 = vec_madd(s0, wj, zero);
100 t0 = vec_nmsub(s1, wi, t0);
101 t1 = vec_madd(s0, wi, zero);
102 t1 = vec_madd(s1, wj, t1);
103 t1 = vec_perm(t1, t1, reverse);
110 void ff_float_init_altivec(DSPContext* c, AVCodecContext *avctx)
112 c->vector_fmul_reverse = vector_fmul_reverse_altivec;
113 c->vector_fmul_add = vector_fmul_add_altivec;
114 if(!(avctx->flags & CODEC_FLAG_BITEXACT)) {
115 c->vector_fmul_window = vector_fmul_window_altivec;