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ppc: dc predictor 8x8

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Slightly faster, the other dc predictors cannot be faster since
the computation speedup is overwhelmed by the time spent reading
dst to write just the 8x8 part.

Change-Id: I94a0b50500adf8b7b6bb919dbf5c7adf5b9fba66
This commit is contained in:
Luca Barbato 2017-04-09 13:05:09 +00:00 committed by James Zern
parent 6b4a65e8b1
commit 58245d7050
3 changed files with 32 additions and 4 deletions
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6
test/test_intra_pred_speed.cc
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@ -313,9 +313,9 @@ INTRA_PRED_TEST(MSA, TestIntraPred32, vpx_dc_predictor_32x32_msa,
#endif // HAVE_MSA
#if HAVE_VSX
INTRA_PRED_TEST(VSX, TestIntraPred8, NULL, NULL, NULL, NULL, NULL, NULL,
vpx_d45_predictor_8x8_vsx, NULL, NULL, NULL, NULL, NULL,
vpx_tm_predictor_8x8_vsx)
INTRA_PRED_TEST(VSX, TestIntraPred8, vpx_dc_predictor_8x8_vsx, NULL, NULL, NULL,
NULL, NULL, vpx_d45_predictor_8x8_vsx, NULL, NULL, NULL, NULL,
NULL, vpx_tm_predictor_8x8_vsx)
INTRA_PRED_TEST(VSX, TestIntraPred16, vpx_dc_predictor_16x16_vsx,
vpx_dc_left_predictor_16x16_vsx, vpx_dc_top_predictor_16x16_vsx,

28
vpx_dsp/ppc/intrapred_vsx.c
View File

@ -362,6 +362,16 @@ void vpx_tm_predictor_32x32_vsx(uint8_t *dst, ptrdiff_t stride,
tm_predictor_32x8(dst, stride, unpack_to_s16_l(l1), a0, a1, tl);
}
static INLINE void dc_fill_predictor_8x8(uint8_t *dst, const ptrdiff_t stride,
const uint8x16_t val) {
int i;
for (i = 0; i < 8; i++, dst += stride) {
const uint8x16_t d = vec_vsx_ld(0, dst);
vec_vsx_st(xxpermdi(val, d, 1), 0, dst);
}
}
static INLINE void dc_fill_predictor_16x16(uint8_t *dst, const ptrdiff_t stride,
const uint8x16_t val) {
int i;
@ -452,6 +462,19 @@ void vpx_dc_top_predictor_32x32_vsx(uint8_t *dst, ptrdiff_t stride,
dc_fill_predictor_32x32(dst, stride, avg32(above));
}
static uint8x16_t dc_avg8(const uint8_t *above, const uint8_t *left) {
const uint8x16_t a0 = vec_vsx_ld(0, above);
const uint8x16_t l0 = vec_vsx_ld(0, left);
const int32x4_t sum4s =
(int32x4_t)vec_sum4s(l0, vec_sum4s(a0, vec_splat_u32(0)));
const int32x4_t sum4s8 = xxpermdi(sum4s, vec_splat_s32(0), 1);
const uint32x4_t sum = (uint32x4_t)vec_sums(sum4s8, vec_splat_s32(8));
const uint32x4_t avg = (uint32x4_t)vec_sr(sum, vec_splat_u32(4));
return vec_splat(vec_pack(vec_pack(avg, vec_splat_u32(0)), vec_splat_u16(0)),
3);
}
static uint8x16_t dc_avg16(const uint8_t *above, const uint8_t *left) {
const uint8x16_t a0 = vec_vsx_ld(0, above);
const uint8x16_t l0 = vec_vsx_ld(0, left);
@ -465,6 +488,11 @@ static uint8x16_t dc_avg16(const uint8_t *above, const uint8_t *left) {
3);
}
void vpx_dc_predictor_8x8_vsx(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
dc_fill_predictor_8x8(dst, stride, dc_avg8(above, left));
}
void vpx_dc_predictor_16x16_vsx(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
dc_fill_predictor_16x16(dst, stride, dc_avg16(above, left));

2
vpx_dsp/vpx_dsp_rtcd_defs.pl
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@ -98,7 +98,7 @@ add_proto qw/void vpx_tm_predictor_8x8/, "uint8_t *dst, ptrdiff_t y_stride, cons
specialize qw/vpx_tm_predictor_8x8 neon dspr2 msa sse2 vsx/;
add_proto qw/void vpx_dc_predictor_8x8/, "uint8_t *dst, ptrdiff_t y_stride, const uint8_t *above, const uint8_t *left";
specialize qw/vpx_dc_predictor_8x8 dspr2 neon msa sse2/;
specialize qw/vpx_dc_predictor_8x8 dspr2 neon msa sse2 vsx/;
add_proto qw/void vpx_dc_top_predictor_8x8/, "uint8_t *dst, ptrdiff_t y_stride, const uint8_t *above, const uint8_t *left";
specialize qw/vpx_dc_top_predictor_8x8 neon msa sse2/;