mirror of
https://github.com/FFmpeg/FFmpeg.git
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81 lines
2.6 KiB
C
81 lines
2.6 KiB
C
/*
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* Copyright (c) 2007 Luca Barbato <lu_zero@gentoo.org>
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "config.h"
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#include "libavutil/attributes.h"
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#include "libavutil/cpu.h"
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#include "libavutil/ppc/cpu.h"
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#include "libavutil/ppc/util_altivec.h"
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#include "libavcodec/apedsp.h"
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#if HAVE_ALTIVEC && HAVE_BIGENDIAN
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static int32_t scalarproduct_and_madd_int16_altivec(int16_t *v1,
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const int16_t *v2,
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const int16_t *v3,
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int order, int mul)
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{
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LOAD_ZERO;
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vec_s16 *pv1 = (vec_s16 *) v1;
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register vec_s16 muls = { mul, mul, mul, mul, mul, mul, mul, mul };
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register vec_s16 t0, t1, i0, i1, i4;
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register vec_s16 i2 = vec_ld(0, v2), i3 = vec_ld(0, v3);
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register vec_s32 res = zero_s32v;
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register vec_u8 align = vec_lvsl(0, v2);
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int32_t ires;
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order >>= 4;
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do {
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i1 = vec_ld(16, v2);
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t0 = vec_perm(i2, i1, align);
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i2 = vec_ld(32, v2);
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t1 = vec_perm(i1, i2, align);
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i0 = pv1[0];
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i1 = pv1[1];
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res = vec_msum(t0, i0, res);
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res = vec_msum(t1, i1, res);
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i4 = vec_ld(16, v3);
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t0 = vec_perm(i3, i4, align);
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i3 = vec_ld(32, v3);
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t1 = vec_perm(i4, i3, align);
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pv1[0] = vec_mladd(t0, muls, i0);
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pv1[1] = vec_mladd(t1, muls, i1);
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pv1 += 2;
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v2 += 16;
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v3 += 16;
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} while (--order);
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res = vec_splat(vec_sums(res, zero_s32v), 3);
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vec_ste(res, 0, &ires);
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return ires;
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}
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#endif /* HAVE_ALTIVEC && HAVE_BIGENDIAN */
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av_cold void ff_apedsp_init_ppc(APEDSPContext *c)
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{
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#if HAVE_ALTIVEC && HAVE_BIGENDIAN
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if (!PPC_ALTIVEC(av_get_cpu_flags()))
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return;
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c->scalarproduct_and_madd_int16 = scalarproduct_and_madd_int16_altivec;
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#endif /* HAVE_ALTIVEC && HAVE_BIGENDIAN */
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}
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