2 * Copyright (c) 2006 Luca Barbato <lu_zero@gentoo.org>
4 * This file is part of FFmpeg.
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.
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.
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
25 #include "libavutil/attributes.h"
26 #include "libavutil/cpu.h"
27 #include "libavcodec/vorbisdsp.h"
30 static void vorbis_inverse_coupling_altivec(float *mag, float *ang,
35 vector bool int t0, t1;
36 const vector unsigned int v_31 = //XXX
37 vec_add(vec_add(vec_splat_u32(15),vec_splat_u32(15)),vec_splat_u32(1));
38 for (i = 0; i < blocksize; i += 4) {
41 t0 = vec_cmple(m, (vector float)vec_splat_u32(0));
42 t1 = vec_cmple(a, (vector float)vec_splat_u32(0));
43 a = vec_xor(a, (vector float) vec_sl((vector unsigned int)t0, v_31));
44 t0 = (vector bool int)vec_and(a, t1);
45 t1 = (vector bool int)vec_andc(a, t1);
46 a = vec_sub(m, (vector float)t1);
47 m = vec_add(m, (vector float)t0);
52 #endif /* HAVE_ALTIVEC */
54 av_cold void ff_vorbisdsp_init_ppc(VorbisDSPContext *c)
57 if (av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC) {
58 c->vorbis_inverse_coupling = vorbis_inverse_coupling_altivec;
60 #endif /* HAVE_ALTIVEC */