shithub: libvpx

Info  •  Files  •  Log  •  Branches

ppc: dc top and left predictor 16x16

13x faster.

Change-Id: I1771ac39fda599153f933cb3f0506c9f97a6cbe6

--- a/test/test_intra_pred_speed.cc

+++ b/test/test_intra_pred_speed.cc

@@ -316,10 +316,10 @@

 INTRA_PRED_TEST(VSX, TestIntraPred8, NULL, NULL, NULL, NULL, NULL, NULL, NULL,

                 NULL, NULL, NULL, NULL, NULL, vpx_tm_predictor_8x8_vsx)

-INTRA_PRED_TEST(VSX, TestIntraPred16, NULL, NULL, NULL,

-                vpx_dc_128_predictor_16x16_vsx, vpx_v_predictor_16x16_vsx,

-                vpx_h_predictor_16x16_vsx, NULL, NULL, NULL, NULL, NULL, NULL,

-                vpx_tm_predictor_16x16_vsx)

+INTRA_PRED_TEST(VSX, TestIntraPred16, NULL, vpx_dc_left_predictor_16x16_vsx,

+                vpx_dc_top_predictor_16x16_vsx, vpx_dc_128_predictor_16x16_vsx,

+                vpx_v_predictor_16x16_vsx, vpx_h_predictor_16x16_vsx, NULL,

+                NULL, NULL, NULL, NULL, NULL, vpx_tm_predictor_16x16_vsx)

 INTRA_PRED_TEST(VSX, TestIntraPred32, NULL, NULL, NULL,

                 vpx_dc_128_predictor_32x32_vsx, vpx_v_predictor_32x32_vsx,

--- a/vpx_dsp/ppc/intrapred_vsx.c

+++ b/vpx_dsp/ppc/intrapred_vsx.c

@@ -398,3 +398,28 @@

   dc_fill_predictor_32x32(dst, stride, v128);

 }

+

+static uint8x16_t avg16(const uint8_t *values) {

+  const int32x4_t sum4s =

+      (int32x4_t)vec_sum4s(vec_vsx_ld(0, values), vec_splat_u32(0));

+  const uint32x4_t sum = (uint32x4_t)vec_sums(sum4s, 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);

+}

+

+void vpx_dc_left_predictor_16x16_vsx(uint8_t *dst, ptrdiff_t stride,

+                                     const uint8_t *above,

+                                     const uint8_t *left) {

+  (void)above;

+

+  dc_fill_predictor_16x16(dst, stride, avg16(left));

+}

+

+void vpx_dc_top_predictor_16x16_vsx(uint8_t *dst, ptrdiff_t stride,

+                                    const uint8_t *above, const uint8_t *left) {

+  (void)left;

+

+  dc_fill_predictor_16x16(dst, stride, avg16(above));

+}

--- a/vpx_dsp/vpx_dsp_rtcd_defs.pl

+++ b/vpx_dsp/vpx_dsp_rtcd_defs.pl

@@ -139,10 +139,10 @@

 specialize qw/vpx_dc_predictor_16x16 dspr2 neon msa sse2/;

 add_proto qw/void vpx_dc_top_predictor_16x16/, "uint8_t *dst, ptrdiff_t y_stride, const uint8_t *above, const uint8_t *left";

-specialize qw/vpx_dc_top_predictor_16x16 neon msa sse2/;

+specialize qw/vpx_dc_top_predictor_16x16 neon msa sse2 vsx/;

 add_proto qw/void vpx_dc_left_predictor_16x16/, "uint8_t *dst, ptrdiff_t y_stride, const uint8_t *above, const uint8_t *left";

-specialize qw/vpx_dc_left_predictor_16x16 neon msa sse2/;

+specialize qw/vpx_dc_left_predictor_16x16 neon msa sse2 vsx/;

 add_proto qw/void vpx_dc_128_predictor_16x16/, "uint8_t *dst, ptrdiff_t y_stride, const uint8_t *above, const uint8_t *left";

 specialize qw/vpx_dc_128_predictor_16x16 neon msa sse2 vsx/;