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libavcodec
ppc
lossless_audiodsp_altivec.c
Go to the documentation of this file.
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/*
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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 FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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#if HAVE_ALTIVEC_H
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#include <altivec.h>
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#endif
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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/types_altivec.h
"
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#include "
libavcodec/lossless_audiodsp.h
"
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#if HAVE_BIGENDIAN
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#define GET_T(tt0,tt1,src,a,b){ \
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a = vec_ld(16, src); \
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tt0 = vec_perm(b, a, align); \
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b = vec_ld(32, src); \
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tt1 = vec_perm(a, b, align); \
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}
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#else
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#define GET_T(tt0,tt1,src,a,b){ \
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tt0 = vec_vsx_ld(0, src); \
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tt1 = vec_vsx_ld(16, src); \
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}
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#endif
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#if HAVE_ALTIVEC
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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, i2, i3;
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register
vec_s32
res =
zero_s32v
;
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#if HAVE_BIGENDIAN
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register
vec_u8
align
= vec_lvsl(0, v2);
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i2 = vec_ld(0, v2);
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i3 = vec_ld(0, v3);
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#endif
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int32_t
ires;
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order >>= 4;
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do
{
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GET_T
(t0,t1,v2,i1,i2);
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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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GET_T
(t0,t1,v3,i4,i3);
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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 */
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av_cold
void
ff_llauddsp_init_ppc
(
LLAudDSPContext
*
c
)
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{
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#if HAVE_ALTIVEC
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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 */
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}
zero_s32v
#define zero_s32v
Definition:
types_altivec.h:45
cpu.h
ff_llauddsp_init_ppc
av_cold void ff_llauddsp_init_ppc(LLAudDSPContext *c)
Definition:
lossless_audiodsp_altivec.c:85
vec_s32
#define vec_s32
Definition:
types_altivec.h:32
attributes.h
Macro definitions for various function/variable attributes.
config.h
av_cold
#define av_cold
Definition:
attributes.h:74
t0
#define t0
Definition:
regdef.h:28
vec_s16
#define vec_s16
Definition:
types_altivec.h:30
LLAudDSPContext
Definition:
lossless_audiodsp.h:28
PPC_ALTIVEC
#define PPC_ALTIVEC(flags)
Definition:
cpu.h:26
t1
#define t1
Definition:
regdef.h:29
LOAD_ZERO
#define LOAD_ZERO
Definition:
types_altivec.h:38
lossless_audiodsp.h
int32_t
int32_t
Definition:
audio_convert.c:194
align
const AVS_VideoInfo int align
Definition:
avisynth_c.h:696
vec_u8
#define vec_u8
Definition:
types_altivec.h:27
types_altivec.h
cpu.h
LLAudDSPContext::scalarproduct_and_madd_int16
int32_t(* scalarproduct_and_madd_int16)(int16_t *v1, const int16_t *v2, const int16_t *v3, int len, int mul)
Calculate scalar product of v1 and v2, and v1[i] += v3[i] * mul.
Definition:
lossless_audiodsp.h:35
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition:
cpu.c:75
c
static double c[64]
Definition:
vsrc_mptestsrc.c:87
GET_T
#define GET_T(tt0, tt1, src, a, b)
Definition:
lossless_audiodsp_altivec.c:40
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