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Altivec implementation of APE vector functions

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Originally committed as revision 14082 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Kostya Shishkov 2008-07-06 07:33:09 +00:00
parent 88c0536a42
commit 7246d6311e
1 changed files with 63 additions and 0 deletions
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63
libavcodec/ppc/int_altivec.c
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@ -29,6 +29,8 @@
#include "dsputil_altivec.h"
#include "types_altivec.h"
static int ssd_int8_vs_int16_altivec(const int8_t *pix1, const int16_t *pix2,
int size) {
int i, size16;
@ -74,7 +76,68 @@ static int ssd_int8_vs_int16_altivec(const int8_t *pix1, const int16_t *pix2,
return u.score[3];
}
static void add_int16_altivec(int16_t * v1, int16_t * v2, int order)
{
int i;
register vec_s16_t vec, *pv;
for(i = 0; i < order; i += 8){
pv = (vec_s16_t*)v2;
vec = vec_perm(pv[0], pv[1], vec_lvsl(0, v2));
vec_st(vec_add(vec_ld(0, v1), vec), 0, v1);
v1 += 8;
v2 += 8;
}
}
static void sub_int16_altivec(int16_t * v1, int16_t * v2, int order)
{
int i;
register vec_s16_t vec, *pv;
for(i = 0; i < order; i += 8){
pv = (vec_s16_t*)v2;
vec = vec_perm(pv[0], pv[1], vec_lvsl(0, v2));
vec_st(vec_sub(vec_ld(0, v1), vec), 0, v1);
v1 += 8;
v2 += 8;
}
}
static int32_t scalarproduct_int16_altivec(int16_t * v1, int16_t * v2, int order, const int shift)
{
int i;
LOAD_ZERO;
register vec_s16_t vec1, *pv;
register vec_s32_t res = vec_splat_s32(0), t;
register vec_u32_t shifts;
DECLARE_ALIGNED_16(int32_t, ires);
shifts = zero_u32v;
if(shift & 0x10) shifts = vec_add(shifts, vec_sl(vec_splat_u32(0x08), vec_splat_u32(0x1)));
if(shift & 0x08) shifts = vec_add(shifts, vec_splat_u32(0x08));
if(shift & 0x04) shifts = vec_add(shifts, vec_splat_u32(0x04));
if(shift & 0x02) shifts = vec_add(shifts, vec_splat_u32(0x02));
if(shift & 0x01) shifts = vec_add(shifts, vec_splat_u32(0x01));
for(i = 0; i < order; i += 8){
pv = (vec_s16_t*)v1;
vec1 = vec_perm(pv[0], pv[1], vec_lvsl(0, v1));
t = vec_msum(vec1, vec_ld(0, v2), zero_s32v);
t = vec_sr(t, shifts);
res = vec_sums(t, res);
v1 += 8;
v2 += 8;
}
res = vec_splat(res, 3);
vec_ste(res, 0, &ires);
return ires;
}
void int_init_altivec(DSPContext* c, AVCodecContext *avctx)
{
c->ssd_int8_vs_int16 = ssd_int8_vs_int16_altivec;
c->add_int16 = add_int16_altivec;
c->sub_int16 = sub_int16_altivec;
c->scalarproduct_int16 = scalarproduct_int16_altivec;
}