shithub: libvpx

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ppc: dc top and left predictor 32x32

6x faster.

Change-Id: I717995b4056e5579c68191d11b495372971fe1ae

--- a/test/test_intra_pred_speed.cc

+++ b/test/test_intra_pred_speed.cc

@@ -321,10 +321,10 @@

                 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,

-                vpx_h_predictor_32x32_vsx, NULL, NULL, NULL, NULL, NULL, NULL,

-                vpx_tm_predictor_32x32_vsx)

+INTRA_PRED_TEST(VSX, TestIntraPred32, NULL, vpx_dc_left_predictor_32x32_vsx,

+                vpx_dc_top_predictor_32x32_vsx, vpx_dc_128_predictor_32x32_vsx,

+                vpx_v_predictor_32x32_vsx, vpx_h_predictor_32x32_vsx, NULL,

+                NULL, NULL, NULL, NULL, NULL, vpx_tm_predictor_32x32_vsx)

 #endif  // HAVE_VSX

 // -----------------------------------------------------------------------------

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

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

@@ -423,3 +423,31 @@

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

 }

+

+static uint8x16_t avg32(const uint8_t *values) {

+  const uint8x16_t v0 = vec_vsx_ld(0, values);

+  const uint8x16_t v1 = vec_vsx_ld(16, values);

+  const int32x4_t v16 = vec_sl(vec_splat_s32(1), vec_splat_u32(4));

+  const int32x4_t sum4s =

+      (int32x4_t)vec_sum4s(v0, vec_sum4s(v1, vec_splat_u32(0)));

+  const uint32x4_t sum = (uint32x4_t)vec_sums(sum4s, v16);

+  const uint32x4_t avg = (uint32x4_t)vec_sr(sum, vec_splat_u32(5));

+

+  return vec_splat(vec_pack(vec_pack(avg, vec_splat_u32(0)), vec_splat_u16(0)),

+                   3);

+}

+

+void vpx_dc_left_predictor_32x32_vsx(uint8_t *dst, ptrdiff_t stride,

+                                     const uint8_t *above,

+                                     const uint8_t *left) {

+  (void)above;

+

+  dc_fill_predictor_32x32(dst, stride, avg32(left));

+}

+

+void vpx_dc_top_predictor_32x32_vsx(uint8_t *dst, ptrdiff_t stride,

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

+  (void)left;

+

+  dc_fill_predictor_32x32(dst, stride, avg32(above));

+}

--- a/vpx_dsp/vpx_dsp_rtcd_defs.pl

+++ b/vpx_dsp/vpx_dsp_rtcd_defs.pl

@@ -177,10 +177,10 @@

 specialize qw/vpx_dc_predictor_32x32 msa neon sse2/;

 add_proto qw/void vpx_dc_top_predictor_32x32/, "uint8_t *dst, ptrdiff_t y_stride, const uint8_t *above, const uint8_t *left";

-specialize qw/vpx_dc_top_predictor_32x32 msa neon sse2/;

+specialize qw/vpx_dc_top_predictor_32x32 msa neon sse2 vsx/;

 add_proto qw/void vpx_dc_left_predictor_32x32/, "uint8_t *dst, ptrdiff_t y_stride, const uint8_t *above, const uint8_t *left";

-specialize qw/vpx_dc_left_predictor_32x32 msa neon sse2/;

+specialize qw/vpx_dc_left_predictor_32x32 msa neon sse2 vsx/;

 add_proto qw/void vpx_dc_128_predictor_32x32/, "uint8_t *dst, ptrdiff_t y_stride, const uint8_t *above, const uint8_t *left";

 specialize qw/vpx_dc_128_predictor_32x32 msa neon sse2 vsx/;