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  1. /*
  2.  * Copyright (c) 2006 Luca Barbato <lu_zero@gentoo.org>
  3.  *
  4.  * This file is part of FFmpeg.
  5.  *
  6.  * FFmpeg 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.  * FFmpeg 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 FFmpeg; if not, write to the Free Software
  18.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19.  */
  20.  
  21. #include "util_altivec.h"
  22. #include "float_dsp_altivec.h"
  23.  
  24. void ff_vector_fmul_altivec(float *dst, const float *src0, const float *src1,
  25.                             int len)
  26. {
  27.     int i;
  28.     vector float d0, d1, s, zero = (vector float)vec_splat_u32(0);
  29.     for (i = 0; i < len - 7; i += 8) {
  30.         d0 = vec_ld( 0, src0 + i);
  31.         s  = vec_ld( 0, src1 + i);
  32.         d1 = vec_ld(16, src0 + i);
  33.         d0 = vec_madd(d0, s, zero);
  34.         d1 = vec_madd(d1, vec_ld(16, src1 + i), zero);
  35.         vec_st(d0,  0, dst + i);
  36.         vec_st(d1, 16, dst + i);
  37.     }
  38. }
  39.  
  40. void ff_vector_fmul_window_altivec(float *dst, const float *src0,
  41.                                    const float *src1, const float *win, int len)
  42. {
  43.     vector float zero, t0, t1, s0, s1, wi, wj;
  44.     const vector unsigned char reverse = vcprm(3, 2, 1, 0);
  45.     int i, j;
  46.  
  47.     dst  += len;
  48.     win  += len;
  49.     src0 += len;
  50.  
  51.     zero = (vector float)vec_splat_u32(0);
  52.  
  53.     for (i = -len * 4, j = len * 4 - 16; i < 0; i += 16, j -= 16) {
  54.         s0 = vec_ld(i, src0);
  55.         s1 = vec_ld(j, src1);
  56.         wi = vec_ld(i, win);
  57.         wj = vec_ld(j, win);
  58.  
  59.         s1 = vec_perm(s1, s1, reverse);
  60.         wj = vec_perm(wj, wj, reverse);
  61.  
  62.         t0 = vec_madd(s0, wj, zero);
  63.         t0 = vec_nmsub(s1, wi, t0);
  64.         t1 = vec_madd(s0, wi, zero);
  65.         t1 = vec_madd(s1, wj, t1);
  66.         t1 = vec_perm(t1, t1, reverse);
  67.  
  68.         vec_st(t0, i, dst);
  69.         vec_st(t1, j, dst);
  70.     }
  71. }
  72.  
  73. void ff_vector_fmul_add_altivec(float *dst, const float *src0,
  74.                                 const float *src1, const float *src2,
  75.                                 int len)
  76. {
  77.     int i;
  78.     vector float d, s0, s1, s2, t0, t1, edges;
  79.     vector unsigned char align = vec_lvsr(0,dst),
  80.                          mask = vec_lvsl(0, dst);
  81.  
  82.     for (i = 0; i < len - 3; i += 4) {
  83.         t0 = vec_ld(0, dst + i);
  84.         t1 = vec_ld(15, dst + i);
  85.         s0 = vec_ld(0, src0 + i);
  86.         s1 = vec_ld(0, src1 + i);
  87.         s2 = vec_ld(0, src2 + i);
  88.         edges = vec_perm(t1, t0, mask);
  89.         d = vec_madd(s0, s1, s2);
  90.         t1 = vec_perm(d, edges, align);
  91.         t0 = vec_perm(edges, d, align);
  92.         vec_st(t1, 15, dst + i);
  93.         vec_st(t0, 0, dst + i);
  94.     }
  95. }
  96.  
  97. void ff_vector_fmul_reverse_altivec(float *dst, const float *src0,
  98.                                     const float *src1, int len)
  99. {
  100.     int i;
  101.     vector float d, s0, s1, h0, l0,
  102.                 s2, s3, zero = (vector float) vec_splat_u32(0);
  103.  
  104.     src1 += len-4;
  105.     for(i = 0; i < len - 7; i += 8) {
  106.         s1 = vec_ld(0, src1 - i);              // [a,b,c,d]
  107.         s0 = vec_ld(0, src0 + i);
  108.         l0 = vec_mergel(s1, s1);               // [c,c,d,d]
  109.         s3 = vec_ld(-16, src1 - i);
  110.         h0 = vec_mergeh(s1, s1);               // [a,a,b,b]
  111.         s2 = vec_ld(16, src0 + i);
  112.         s1 = vec_mergeh(vec_mergel(l0, h0),    // [d,b,d,b]
  113.                         vec_mergeh(l0, h0));   // [c,a,c,a]
  114.         // [d,c,b,a]
  115.         l0 = vec_mergel(s3, s3);
  116.         d = vec_madd(s0, s1, zero);
  117.         h0 = vec_mergeh(s3, s3);
  118.         vec_st(d, 0, dst + i);
  119.         s3 = vec_mergeh(vec_mergel(l0, h0),
  120.                         vec_mergeh(l0, h0));
  121.         d = vec_madd(s2, s3, zero);
  122.         vec_st(d, 16, dst + i);
  123.     }
  124. }
  125.