shithub: libvpx

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vp9_reconintra_neon: add d45 8x8

based on ssse3 implementation

~91% faster over 20M pixels

Change-Id: I6d743a53352c2d6de0efe7899d7996e8b0f7fa29

--- a/test/test_intra_pred_speed.cc

+++ b/test/test_intra_pred_speed.cc

@@ -264,8 +264,8 @@

 INTRA_PRED_TEST(NEON, TestIntraPred8, vp9_dc_predictor_8x8_neon,

                 vp9_dc_left_predictor_8x8_neon, vp9_dc_top_predictor_8x8_neon,

                 vp9_dc_128_predictor_8x8_neon, vp9_v_predictor_8x8_neon,

-                vp9_h_predictor_8x8_neon, NULL, NULL, NULL, NULL, NULL, NULL,

-                vp9_tm_predictor_8x8_neon)

+                vp9_h_predictor_8x8_neon, vp9_d45_predictor_8x8_neon, NULL,

+                NULL, NULL, NULL, NULL, vp9_tm_predictor_8x8_neon)

 #endif  // HAVE_NEON

--- a/vp9/common/arm/neon/vp9_reconintra_neon.c

+++ b/vp9/common/arm/neon/vp9_reconintra_neon.c

@@ -338,6 +338,26 @@

   dst[3 * stride + 3] = above[7];

 }

+void vp9_d45_predictor_8x8_neon(uint8_t *dst, ptrdiff_t stride,

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

+  static const uint8_t shuffle1[8] = { 1, 2, 3, 4, 5, 6, 7, 7 };

+  static const uint8_t shuffle2[8] = { 2, 3, 4, 5, 6, 7, 7, 7 };

+  const uint8x8_t sh_12345677 = vld1_u8(shuffle1);

+  const uint8x8_t sh_23456777 = vld1_u8(shuffle2);

+  const uint8x8_t A0 = vld1_u8(above);  // top row

+  const uint8x8_t A1 = vtbl1_u8(A0, sh_12345677);

+  const uint8x8_t A2 = vtbl1_u8(A0, sh_23456777);

+  const uint8x8_t avg1 = vhadd_u8(A0, A2);

+  uint8x8_t row = vrhadd_u8(avg1, A1);

+  int i;

+  (void)left;

+  for (i = 0; i < 7; ++i) {

+    vst1_u8(dst + i * stride, row);

+    row = vtbl1_u8(row, sh_12345677);

+  }

+  vst1_u8(dst + i * stride, row);

+}

+

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

 void vp9_d135_predictor_4x4_neon(uint8_t *dst, ptrdiff_t stride,

--- a/vp9/common/vp9_rtcd_defs.pl

+++ b/vp9/common/vp9_rtcd_defs.pl

@@ -99,7 +99,7 @@

 specialize qw/vp9_d207_predictor_8x8/, "$ssse3_x86inc";

 add_proto qw/void vp9_d45_predictor_8x8/, "uint8_t *dst, ptrdiff_t y_stride, const uint8_t *above, const uint8_t *left";

-specialize qw/vp9_d45_predictor_8x8/, "$ssse3_x86inc";

+specialize qw/vp9_d45_predictor_8x8 neon/, "$ssse3_x86inc";

 add_proto qw/void vp9_d63_predictor_8x8/, "uint8_t *dst, ptrdiff_t y_stride, const uint8_t *above, const uint8_t *left";

 specialize qw/vp9_d63_predictor_8x8/, "$ssse3_x86inc";