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/*
* Copyright (c) 2015 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 "util_altivec.h"
#include "float_dsp_vsx.h"
void ff_vector_fmul_vsx(float *dst,
const float *src0, const float *src1,
int len)
{
int i;
vec_f d0, d1, zero = (vec_f)vec_splat_u32(0);
for (i = 0; i < len - 7; i += 8) {
d0 = vec_vsx_ld( 0, src0 + i);
d1 = vec_vsx_ld(16, src0 + i);
d0 = vec_madd(d0, vec_vsx_ld( 0, src1 + i), zero);
d1 = vec_madd(d1, vec_vsx_ld(16, src1 + i), zero);
vec_vsx_st(d0, 0, dst + i);
vec_vsx_st(d1, 16, dst + i);
}
}
void ff_vector_fmul_window_vsx(float *dst, const float *src0,
const float *src1, const float *win,
int len)
{
vec_f zero, t0, t1, s0, s1, wi, wj;
const vec_u8 reverse = vcprm(3, 2, 1, 0);
int i, j;
dst += len;
win += len;
src0 += len;
zero = (vec_f)vec_splat_u32(0);
for (i = -len * 4, j = len * 4 - 16; i < 0; i += 16, j -= 16) {
s0 = vec_vsx_ld(i, src0);
s1 = vec_vsx_ld(j, src1);
wi = vec_vsx_ld(i, win);
wj = vec_vsx_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_vsx_st(t0, i, dst);
vec_vsx_st(t1, j, dst);
}
}
void ff_vector_fmul_add_vsx(float *dst, const float *src0,
const float *src1, const float *src2,
int len)
{
int i;
vec_f d, s0, s1, s2;
for (i = 0; i < len - 3; i += 4) {
s0 = vec_vsx_ld(0, src0 + i);
s1 = vec_vsx_ld(0, src1 + i);
s2 = vec_vsx_ld(0, src2 + i);
d = vec_madd(s0, s1, s2);
vec_vsx_st(d, 0, dst + i);
}
}
void ff_vector_fmul_reverse_vsx(float *dst, const float *src0,
const float *src1, int len)
{
int i;
vec_f d, s0, s1, h0, l0, s2, s3;
vec_f zero = (vec_f)vec_splat_u32(0);
src1 += len - 4;
for (i = 0; i < len - 7; i += 8) {
s1 = vec_vsx_ld(0, src1 - i); // [a,b,c,d]
s0 = vec_vsx_ld(0, src0 + i);
l0 = vec_mergel(s1, s1); // [c,c,d,d]
s3 = vec_vsx_ld(-16, src1 - i);
h0 = vec_mergeh(s1, s1); // [a,a,b,b]
s2 = vec_vsx_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_vsx_st(d, 0, dst + i);
s3 = vec_mergeh(vec_mergel(l0, h0),
vec_mergeh(l0, h0));
d = vec_madd(s2, s3, zero);
vec_vsx_st(d, 16, dst + i);
}
}
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