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  1. /*
  2.  * Copyright (c) 2007 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 "config.h"
  22. #if HAVE_ALTIVEC_H
  23. #include <altivec.h>
  24. #endif
  25.  
  26. #include "libavutil/attributes.h"
  27. #include "libavutil/cpu.h"
  28. #include "libavutil/ppc/cpu.h"
  29. #include "libavutil/ppc/types_altivec.h"
  30. #include "libavcodec/lossless_audiodsp.h"
  31.  
  32. #if HAVE_BIGENDIAN
  33. #define GET_T(tt0,tt1,src,a,b){       \
  34.         a = vec_ld(16, src);          \
  35.         tt0 = vec_perm(b, a, align);  \
  36.         b = vec_ld(32, src);          \
  37.         tt1 = vec_perm(a, b, align);  \
  38.  }
  39. #else
  40. #define GET_T(tt0,tt1,src,a,b){       \
  41.         tt0 = vec_vsx_ld(0, src);     \
  42.         tt1 = vec_vsx_ld(16, src);    \
  43.  }
  44. #endif
  45.  
  46. #if HAVE_ALTIVEC
  47. static int32_t scalarproduct_and_madd_int16_altivec(int16_t *v1,
  48.                                                     const int16_t *v2,
  49.                                                     const int16_t *v3,
  50.                                                     int order, int mul)
  51. {
  52.     LOAD_ZERO;
  53.     vec_s16 *pv1 = (vec_s16 *) v1;
  54.     register vec_s16 muls = { mul, mul, mul, mul, mul, mul, mul, mul };
  55.     register vec_s16 t0, t1, i0, i1, i4, i2, i3;
  56.     register vec_s32 res = zero_s32v;
  57. #if HAVE_BIGENDIAN
  58.     register vec_u8 align = vec_lvsl(0, v2);
  59.     i2 = vec_ld(0, v2);
  60.     i3 = vec_ld(0, v3);
  61. #endif
  62.     int32_t ires;
  63.  
  64.     order >>= 4;
  65.     do {
  66.         GET_T(t0,t1,v2,i1,i2);
  67.         i0     = pv1[0];
  68.         i1     = pv1[1];
  69.         res    = vec_msum(t0, i0, res);
  70.         res    = vec_msum(t1, i1, res);
  71.         GET_T(t0,t1,v3,i4,i3);
  72.         pv1[0] = vec_mladd(t0, muls, i0);
  73.         pv1[1] = vec_mladd(t1, muls, i1);
  74.         pv1   += 2;
  75.         v2    += 16;
  76.         v3    += 16;
  77.     } while (--order);
  78.     res = vec_splat(vec_sums(res, zero_s32v), 3);
  79.     vec_ste(res, 0, &ires);
  80.  
  81.     return ires;
  82. }
  83. #endif /* HAVE_ALTIVEC */
  84.  
  85. av_cold void ff_llauddsp_init_ppc(LLAudDSPContext *c)
  86. {
  87. #if HAVE_ALTIVEC
  88.     if (!PPC_ALTIVEC(av_get_cpu_flags()))
  89.         return;
  90.  
  91.     c->scalarproduct_and_madd_int16 = scalarproduct_and_madd_int16_altivec;
  92. #endif /* HAVE_ALTIVEC */
  93. }
  94.