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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 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 #include "libavutil/attributes.h"
23 #include "libavutil/cpu.h"
24 #include "libavutil/mem.h"
25 #include "libavutil/ppc/cpu.h"
27 #include "libavcodec/fmtconvert.h"
28 
29 #if HAVE_ALTIVEC
30 
31 static void int32_to_float_fmul_scalar_altivec(float *dst, const int32_t *src,
32  float mul, int len)
33 {
34  union {
35  vector float v;
36  float s[4];
37  } mul_u;
38  int i;
39  vector float src1, src2, dst1, dst2, mul_v, zero;
40 
41  zero = (vector float)vec_splat_u32(0);
42  mul_u.s[0] = mul;
43  mul_v = vec_splat(mul_u.v, 0);
44 
45  for (i = 0; i < len; i += 8) {
46  src1 = vec_ctf(vec_ld(0, src+i), 0);
47  src2 = vec_ctf(vec_ld(16, src+i), 0);
48  dst1 = vec_madd(src1, mul_v, zero);
49  dst2 = vec_madd(src2, mul_v, zero);
50  vec_st(dst1, 0, dst+i);
51  vec_st(dst2, 16, dst+i);
52  }
53 }
54 
55 #endif /* HAVE_ALTIVEC */
56 
58  AVCodecContext *avctx)
59 {
60 #if HAVE_ALTIVEC
62  return;
63 
64  c->int32_to_float_fmul_scalar = int32_to_float_fmul_scalar_altivec;
65 #endif /* HAVE_ALTIVEC */
66 }
const char * s
Definition: avisynth_c.h:631
memory handling functions
Macro definitions for various function/variable attributes.
#define av_cold
Definition: attributes.h:82
#define PPC_ALTIVEC(flags)
Definition: cpu.h:26
#define zero
Definition: regdef.h:64
int32_t
void(* int32_to_float_fmul_scalar)(float *dst, const int32_t *src, float mul, int len)
Convert an array of int32_t to float and multiply by a float value.
Definition: fmtconvert.h:38
av_cold void ff_fmt_convert_init_ppc(FmtConvertContext *c, AVCodecContext *avctx)
#define src
Definition: vp9dsp.c:530
#define src1
Definition: h264pred.c:139
main external API structure.
Definition: avcodec.h:1642
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:76
Contains misc utility macros and inline functions.
static double c[64]
int len