fmtconvert_altivec.c
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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/fmtconvert.h"
22 
23 #include "dsputil_altivec.h"
24 #include "util_altivec.h"
25 
26 static void int32_to_float_fmul_scalar_altivec(float *dst, const int *src, float mul, int len)
27 {
28  union {
29  vector float v;
30  float s[4];
31  } mul_u;
32  int i;
33  vector float src1, src2, dst1, dst2, mul_v, zero;
34 
35  zero = (vector float)vec_splat_u32(0);
36  mul_u.s[0] = mul;
37  mul_v = vec_splat(mul_u.v, 0);
38 
39  for(i=0; i<len; i+=8) {
40  src1 = vec_ctf(vec_ld(0, src+i), 0);
41  src2 = vec_ctf(vec_ld(16, src+i), 0);
42  dst1 = vec_madd(src1, mul_v, zero);
43  dst2 = vec_madd(src2, mul_v, zero);
44  vec_st(dst1, 0, dst+i);
45  vec_st(dst2, 16, dst+i);
46  }
47 }
48 
49 
50 static vector signed short
51 float_to_int16_one_altivec(const float *src)
52 {
53  vector float s0 = vec_ld(0, src);
54  vector float s1 = vec_ld(16, src);
55  vector signed int t0 = vec_cts(s0, 0);
56  vector signed int t1 = vec_cts(s1, 0);
57  return vec_packs(t0,t1);
58 }
59 
60 static void float_to_int16_altivec(int16_t *dst, const float *src, long len)
61 {
62  int i;
63  vector signed short d0, d1, d;
64  vector unsigned char align;
65  if(((long)dst)&15) //FIXME
66  for(i=0; i<len-7; i+=8) {
67  d0 = vec_ld(0, dst+i);
68  d = float_to_int16_one_altivec(src+i);
69  d1 = vec_ld(15, dst+i);
70  d1 = vec_perm(d1, d0, vec_lvsl(0,dst+i));
71  align = vec_lvsr(0, dst+i);
72  d0 = vec_perm(d1, d, align);
73  d1 = vec_perm(d, d1, align);
74  vec_st(d0, 0, dst+i);
75  vec_st(d1,15, dst+i);
76  }
77  else
78  for(i=0; i<len-7; i+=8) {
79  d = float_to_int16_one_altivec(src+i);
80  vec_st(d, 0, dst+i);
81  }
82 }
83 
84 static void
85 float_to_int16_interleave_altivec(int16_t *dst, const float **src,
86  long len, int channels)
87 {
88  int i;
89  vector signed short d0, d1, d2, c0, c1, t0, t1;
90  vector unsigned char align;
91  if(channels == 1)
92  float_to_int16_altivec(dst, src[0], len);
93  else
94  if (channels == 2) {
95  if(((long)dst)&15)
96  for(i=0; i<len-7; i+=8) {
97  d0 = vec_ld(0, dst + i);
98  t0 = float_to_int16_one_altivec(src[0] + i);
99  d1 = vec_ld(31, dst + i);
100  t1 = float_to_int16_one_altivec(src[1] + i);
101  c0 = vec_mergeh(t0, t1);
102  c1 = vec_mergel(t0, t1);
103  d2 = vec_perm(d1, d0, vec_lvsl(0, dst + i));
104  align = vec_lvsr(0, dst + i);
105  d0 = vec_perm(d2, c0, align);
106  d1 = vec_perm(c0, c1, align);
107  vec_st(d0, 0, dst + i);
108  d0 = vec_perm(c1, d2, align);
109  vec_st(d1, 15, dst + i);
110  vec_st(d0, 31, dst + i);
111  dst+=8;
112  }
113  else
114  for(i=0; i<len-7; i+=8) {
115  t0 = float_to_int16_one_altivec(src[0] + i);
116  t1 = float_to_int16_one_altivec(src[1] + i);
117  d0 = vec_mergeh(t0, t1);
118  d1 = vec_mergel(t0, t1);
119  vec_st(d0, 0, dst + i);
120  vec_st(d1, 16, dst + i);
121  dst+=8;
122  }
123  } else {
124  DECLARE_ALIGNED(16, int16_t, tmp)[len];
125  int c, j;
126  for (c = 0; c < channels; c++) {
127  float_to_int16_altivec(tmp, src[c], len);
128  for (i = 0, j = c; i < len; i++, j+=channels) {
129  dst[j] = tmp[i];
130  }
131  }
132  }
133 }
134 
136 {
138  if(!(avctx->flags & CODEC_FLAG_BITEXACT)) {
141  }
142 }