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"
26 #include "libavutil/ppc/util_altivec.h"
27 #include "libavcodec/fmtconvert.h"
28
29 #if HAVE_ALTIVEC
30
int32_to_float_fmul_scalar_altivec(float * dst,const int32_t * src,float mul,int len)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
ff_fmt_convert_init_ppc(FmtConvertContext * c,AVCodecContext * avctx)57 av_cold void ff_fmt_convert_init_ppc(FmtConvertContext *c,
58 AVCodecContext *avctx)
59 {
60 #if HAVE_ALTIVEC
61 if (!PPC_ALTIVEC(av_get_cpu_flags()))
62 return;
63
64 c->int32_to_float_fmul_scalar = int32_to_float_fmul_scalar_altivec;
65 #endif /* HAVE_ALTIVEC */
66 }
67