1/* 2 * Copyright (c) 2006 Luca Barbato <lu_zero@gentoo.org> 3 * 4 * This file is part of Libav. 5 * 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. 10 * 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. 15 * 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 19 */ 20 21#include "libavcodec/dsputil.h" 22 23#include "dsputil_altivec.h" 24#include "util_altivec.h" 25 26static void vector_fmul_altivec(float *dst, const float *src0, const float *src1, int len) 27{ 28 int i; 29 vector float d0, d1, s, zero = (vector float)vec_splat_u32(0); 30 for(i=0; i<len-7; i+=8) { 31 d0 = vec_ld(0, src0+i); 32 s = vec_ld(0, src1+i); 33 d1 = vec_ld(16, src0+i); 34 d0 = vec_madd(d0, s, zero); 35 d1 = vec_madd(d1, vec_ld(16,src1+i), zero); 36 vec_st(d0, 0, dst+i); 37 vec_st(d1, 16, dst+i); 38 } 39} 40 41static void vector_fmul_reverse_altivec(float *dst, const float *src0, 42 const float *src1, int len) 43{ 44 int i; 45 vector float d, s0, s1, h0, l0, 46 s2, s3, zero = (vector float)vec_splat_u32(0); 47 src1 += len-4; 48 for(i=0; i<len-7; i+=8) { 49 s1 = vec_ld(0, src1-i); // [a,b,c,d] 50 s0 = vec_ld(0, src0+i); 51 l0 = vec_mergel(s1, s1); // [c,c,d,d] 52 s3 = vec_ld(-16, src1-i); 53 h0 = vec_mergeh(s1, s1); // [a,a,b,b] 54 s2 = vec_ld(16, src0+i); 55 s1 = vec_mergeh(vec_mergel(l0,h0), // [d,b,d,b] 56 vec_mergeh(l0,h0)); // [c,a,c,a] 57 // [d,c,b,a] 58 l0 = vec_mergel(s3, s3); 59 d = vec_madd(s0, s1, zero); 60 h0 = vec_mergeh(s3, s3); 61 vec_st(d, 0, dst+i); 62 s3 = vec_mergeh(vec_mergel(l0,h0), 63 vec_mergeh(l0,h0)); 64 d = vec_madd(s2, s3, zero); 65 vec_st(d, 16, dst+i); 66 } 67} 68 69static void vector_fmul_add_altivec(float *dst, const float *src0, 70 const float *src1, const float *src2, 71 int len) 72{ 73 int i; 74 vector float d, s0, s1, s2, t0, t1, edges; 75 vector unsigned char align = vec_lvsr(0,dst), 76 mask = vec_lvsl(0, dst); 77 78 for (i=0; i<len-3; i+=4) { 79 t0 = vec_ld(0, dst+i); 80 t1 = vec_ld(15, dst+i); 81 s0 = vec_ld(0, src0+i); 82 s1 = vec_ld(0, src1+i); 83 s2 = vec_ld(0, src2+i); 84 edges = vec_perm(t1 ,t0, mask); 85 d = vec_madd(s0,s1,s2); 86 t1 = vec_perm(d, edges, align); 87 t0 = vec_perm(edges, d, align); 88 vec_st(t1, 15, dst+i); 89 vec_st(t0, 0, dst+i); 90 } 91} 92 93static void vector_fmul_window_altivec(float *dst, const float *src0, const float *src1, const float *win, int len) 94{ 95 vector float zero, t0, t1, s0, s1, wi, wj; 96 const vector unsigned char reverse = vcprm(3,2,1,0); 97 int i,j; 98 99 dst += len; 100 win += len; 101 src0+= len; 102 103 zero = (vector float)vec_splat_u32(0); 104 105 for(i=-len*4, j=len*4-16; i<0; i+=16, j-=16) { 106 s0 = vec_ld(i, src0); 107 s1 = vec_ld(j, src1); 108 wi = vec_ld(i, win); 109 wj = vec_ld(j, win); 110 111 s1 = vec_perm(s1, s1, reverse); 112 wj = vec_perm(wj, wj, reverse); 113 114 t0 = vec_madd(s0, wj, zero); 115 t0 = vec_nmsub(s1, wi, t0); 116 t1 = vec_madd(s0, wi, zero); 117 t1 = vec_madd(s1, wj, t1); 118 t1 = vec_perm(t1, t1, reverse); 119 120 vec_st(t0, i, dst); 121 vec_st(t1, j, dst); 122 } 123} 124 125void float_init_altivec(DSPContext* c, AVCodecContext *avctx) 126{ 127 c->vector_fmul = vector_fmul_altivec; 128 c->vector_fmul_reverse = vector_fmul_reverse_altivec; 129 c->vector_fmul_add = vector_fmul_add_altivec; 130 if(!(avctx->flags & CODEC_FLAG_BITEXACT)) { 131 c->vector_fmul_window = vector_fmul_window_altivec; 132 } 133} 134