yading@10: /*
yading@10:  * Copyright (c) 2006 Luca Barbato <lu_zero@gentoo.org>
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: #include "config.h"
yading@10: #if HAVE_ALTIVEC_H
yading@10: #include <altivec.h>
yading@10: #endif
yading@10: #include "libavutil/attributes.h"
yading@10: #include "libavutil/cpu.h"
yading@10: #include "libavcodec/vorbisdsp.h"
yading@10: 
yading@10: #if HAVE_ALTIVEC
yading@10: static void vorbis_inverse_coupling_altivec(float *mag, float *ang,
yading@10:                                             intptr_t blocksize)
yading@10: {
yading@10:     int i;
yading@10:     vector float m, a;
yading@10:     vector bool int t0, t1;
yading@10:     const vector unsigned int v_31 = //XXX
yading@10:         vec_add(vec_add(vec_splat_u32(15),vec_splat_u32(15)),vec_splat_u32(1));
yading@10:     for (i = 0; i < blocksize; i += 4) {
yading@10:         m = vec_ld(0, mag+i);
yading@10:         a = vec_ld(0, ang+i);
yading@10:         t0 = vec_cmple(m, (vector float)vec_splat_u32(0));
yading@10:         t1 = vec_cmple(a, (vector float)vec_splat_u32(0));
yading@10:         a = vec_xor(a, (vector float) vec_sl((vector unsigned int)t0, v_31));
yading@10:         t0 = (vector bool int)vec_and(a, t1);
yading@10:         t1 = (vector bool int)vec_andc(a, t1);
yading@10:         a = vec_sub(m, (vector float)t1);
yading@10:         m = vec_add(m, (vector float)t0);
yading@10:         vec_stl(a, 0, ang+i);
yading@10:         vec_stl(m, 0, mag+i);
yading@10:     }
yading@10: }
yading@10: #endif /* HAVE_ALTIVEC */
yading@10: 
yading@10: av_cold void ff_vorbisdsp_init_ppc(VorbisDSPContext *c)
yading@10: {
yading@10: #if HAVE_ALTIVEC
yading@10:     if (av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC) {
yading@10:       c->vorbis_inverse_coupling = vorbis_inverse_coupling_altivec;
yading@10:     }
yading@10: #endif /* HAVE_ALTIVEC */
yading@10: }