lossless_audiodsp_altivec.c

   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 }