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lossless_audiodsp_altivec.c
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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 
23 #include "libavutil/attributes.h"
24 #include "libavutil/cpu.h"
25 #include "libavutil/ppc/cpu.h"
27 
29 
30 #if HAVE_BIGENDIAN
31 #define GET_T(tt0,tt1,src,a,b){ \
32  a = vec_ld(16, src); \
33  tt0 = vec_perm(b, a, align); \
34  b = vec_ld(32, src); \
35  tt1 = vec_perm(a, b, align); \
36  }
37 #else
38 #define GET_T(tt0,tt1,src,a,b){ \
39  tt0 = vec_vsx_ld(0, src); \
40  tt1 = vec_vsx_ld(16, src); \
41  }
42 #endif
43 
44 #if HAVE_ALTIVEC
45 static int32_t scalarproduct_and_madd_int16_altivec(int16_t *v1,
46  const int16_t *v2,
47  const int16_t *v3,
48  int order, int mul)
49 {
50  LOAD_ZERO;
51  vec_s16 *pv1 = (vec_s16 *) v1;
52  register vec_s16 muls = { mul, mul, mul, mul, mul, mul, mul, mul };
53  register vec_s16 t0, t1, i0, i1, i4, i2, i3;
54  register vec_s32 res = zero_s32v;
55 #if HAVE_BIGENDIAN
56  register vec_u8 align = vec_lvsl(0, v2);
57  i2 = vec_ld(0, v2);
58  i3 = vec_ld(0, v3);
59 #endif
60  int32_t ires;
61 
62  order >>= 4;
63  do {
64  GET_T(t0,t1,v2,i1,i2);
65  i0 = pv1[0];
66  i1 = pv1[1];
67  res = vec_msum(t0, i0, res);
68  res = vec_msum(t1, i1, res);
69  GET_T(t0,t1,v3,i4,i3);
70  pv1[0] = vec_mladd(t0, muls, i0);
71  pv1[1] = vec_mladd(t1, muls, i1);
72  pv1 += 2;
73  v2 += 16;
74  v3 += 16;
75  } while (--order);
76  res = vec_splat(vec_sums(res, zero_s32v), 3);
77  vec_ste(res, 0, &ires);
78 
79  return ires;
80 }
81 #endif /* HAVE_ALTIVEC */
82 
84 {
85 #if HAVE_ALTIVEC
87  return;
88 
89  c->scalarproduct_and_madd_int16 = scalarproduct_and_madd_int16_altivec;
90 #endif /* HAVE_ALTIVEC */
91 }
av_cold void ff_llauddsp_init_ppc(LLAudDSPContext *c)
#define vec_s32
Definition: util_altivec.h:39
#define LOAD_ZERO
Definition: util_altivec.h:45
#define zero_s32v
Definition: util_altivec.h:52
Macro definitions for various function/variable attributes.
#define av_cold
Definition: attributes.h:82
#define t0
Definition: regdef.h:28
#define vec_s16
Definition: util_altivec.h:37
#define PPC_ALTIVEC(flags)
Definition: cpu.h:26
#define t1
Definition: regdef.h:29
int32_t
#define vec_u8
Definition: util_altivec.h:34
const AVS_VideoInfo int align
Definition: avisynth_c.h:795
int32_t(* scalarproduct_and_madd_int16)(int16_t *v1, const int16_t *v2, const int16_t *v3, int len, int mul)
Calculate scalar product of v1 and v2, and v1[i] += v3[i] * mul.
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:92
Contains misc utility macros and inline functions.
static double c[64]
#define GET_T(tt0, tt1, src, a, b)