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/*
* Copyright (c) 2006 Luca Barbato <lu_zero@gentoo.org>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/ppc/util_altivec.h"
#include "libavcodec/dsputil.h"
#include "dsputil_altivec.h"
static void vector_fmul_reverse_altivec(float *dst, const float *src0,
const float *src1, int len)
{
int i;
vector float d, s0, s1, h0, l0,
s2, s3, zero = (vector float)vec_splat_u32(0);
src1 += len-4;
for(i=0; i<len-7; i+=8) {
s1 = vec_ld(0, src1-i); // [a,b,c,d]
s0 = vec_ld(0, src0+i);
l0 = vec_mergel(s1, s1); // [c,c,d,d]
s3 = vec_ld(-16, src1-i);
h0 = vec_mergeh(s1, s1); // [a,a,b,b]
s2 = vec_ld(16, src0+i);
s1 = vec_mergeh(vec_mergel(l0,h0), // [d,b,d,b]
vec_mergeh(l0,h0)); // [c,a,c,a]
// [d,c,b,a]
l0 = vec_mergel(s3, s3);
d = vec_madd(s0, s1, zero);
h0 = vec_mergeh(s3, s3);
vec_st(d, 0, dst+i);
s3 = vec_mergeh(vec_mergel(l0,h0),
vec_mergeh(l0,h0));
d = vec_madd(s2, s3, zero);
vec_st(d, 16, dst+i);
}
}
static void vector_fmul_add_altivec(float *dst, const float *src0,
const float *src1, const float *src2,
int len)
{
int i;
vector float d, s0, s1, s2, t0, t1, edges;
vector unsigned char align = vec_lvsr(0,dst),
mask = vec_lvsl(0, dst);
for (i=0; i<len-3; i+=4) {
t0 = vec_ld(0, dst+i);
t1 = vec_ld(15, dst+i);
s0 = vec_ld(0, src0+i);
s1 = vec_ld(0, src1+i);
s2 = vec_ld(0, src2+i);
edges = vec_perm(t1 ,t0, mask);
d = vec_madd(s0,s1,s2);
t1 = vec_perm(d, edges, align);
t0 = vec_perm(edges, d, align);
vec_st(t1, 15, dst+i);
vec_st(t0, 0, dst+i);
}
}
static void vector_fmul_window_altivec(float *dst, const float *src0, const float *src1, const float *win, int len)
{
vector float zero, t0, t1, s0, s1, wi, wj;
const vector unsigned char reverse = vcprm(3,2,1,0);
int i,j;
dst += len;
win += len;
src0+= len;
zero = (vector float)vec_splat_u32(0);
for(i=-len*4, j=len*4-16; i<0; i+=16, j-=16) {
s0 = vec_ld(i, src0);
s1 = vec_ld(j, src1);
wi = vec_ld(i, win);
wj = vec_ld(j, win);
s1 = vec_perm(s1, s1, reverse);
wj = vec_perm(wj, wj, reverse);
t0 = vec_madd(s0, wj, zero);
t0 = vec_nmsub(s1, wi, t0);
t1 = vec_madd(s0, wi, zero);
t1 = vec_madd(s1, wj, t1);
t1 = vec_perm(t1, t1, reverse);
vec_st(t0, i, dst);
vec_st(t1, j, dst);
}
}
void ff_float_init_altivec(DSPContext* c, AVCodecContext *avctx)
{
c->vector_fmul_reverse = vector_fmul_reverse_altivec;
c->vector_fmul_add = vector_fmul_add_altivec;
if(!(avctx->flags & CODEC_FLAG_BITEXACT)) {
c->vector_fmul_window = vector_fmul_window_altivec;
}
}
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