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sad4d neon: 4x4, 4x8

BUG=webm:1425

Change-Id: I5081b5ce131821d590c53ac1206a94f50cb8b468

--- a/test/sad_test.cc

+++ b/test/sad_test.cc

@@ -678,6 +678,8 @@

   SadMxNx4Param(64, 64, &vpx_sad64x64x4d_neon),

   SadMxNx4Param(32, 32, &vpx_sad32x32x4d_neon),

   SadMxNx4Param(16, 16, &vpx_sad16x16x4d_neon),

+  SadMxNx4Param(4, 8, &vpx_sad4x8x4d_neon),

+  SadMxNx4Param(4, 4, &vpx_sad4x4x4d_neon),

 };

 INSTANTIATE_TEST_CASE_P(NEON, SADx4Test, ::testing::ValuesIn(x4d_neon_tests));

 #endif  // HAVE_NEON

--- a/vpx_dsp/arm/sad4d_neon.c

+++ b/vpx_dsp/arm/sad4d_neon.c

@@ -13,6 +13,39 @@

 #include "./vpx_config.h"

 #include "./vpx_dsp_rtcd.h"

 #include "vpx/vpx_integer.h"

+#include "vpx_dsp/arm/mem_neon.h"

+#include "vpx_dsp/arm/sum_neon.h"

+

+void vpx_sad4x4x4d_neon(const uint8_t *src, int src_stride,

+                        const uint8_t *const ref[4], int ref_stride,

+                        uint32_t *res) {

+  int i;

+  const uint8x16_t src_u8 = load_unaligned_u8q(src, src_stride);

+  for (i = 0; i < 4; ++i) {

+    const uint8x16_t ref_u8 = load_unaligned_u8q(ref[i], ref_stride);

+    uint16x8_t abs = vabdl_u8(vget_low_u8(src_u8), vget_low_u8(ref_u8));

+    abs = vabal_u8(abs, vget_high_u8(src_u8), vget_high_u8(ref_u8));

+    res[i] = vget_lane_u32(horizontal_add_uint16x8(abs), 0);

+  }

+}

+

+void vpx_sad4x8x4d_neon(const uint8_t *src, int src_stride,

+                        const uint8_t *const ref[4], int ref_stride,

+                        uint32_t *res) {

+  int i;

+  const uint8x16_t src_0 = load_unaligned_u8q(src, src_stride);

+  const uint8x16_t src_1 = load_unaligned_u8q(src + 4 * src_stride, src_stride);

+  for (i = 0; i < 4; ++i) {

+    const uint8x16_t ref_0 = load_unaligned_u8q(ref[i], ref_stride);

+    const uint8x16_t ref_1 =

+        load_unaligned_u8q(ref[i] + 4 * ref_stride, ref_stride);

+    uint16x8_t abs = vabdl_u8(vget_low_u8(src_0), vget_low_u8(ref_0));

+    abs = vabal_u8(abs, vget_high_u8(src_0), vget_high_u8(ref_0));

+    abs = vabal_u8(abs, vget_low_u8(src_1), vget_low_u8(ref_1));

+    abs = vabal_u8(abs, vget_high_u8(src_1), vget_high_u8(ref_1));

+    res[i] = vget_lane_u32(horizontal_add_uint16x8(abs), 0);

+  }

+}

 static INLINE unsigned int horizontal_long_add_16x8(const uint16x8_t vec_lo,

                                                     const uint16x8_t vec_hi) {

--- a/vpx_dsp/vpx_dsp_rtcd_defs.pl

+++ b/vpx_dsp/vpx_dsp_rtcd_defs.pl

@@ -890,10 +890,10 @@

 specialize qw/vpx_sad8x4x4d msa sse2/;

 add_proto qw/void vpx_sad4x8x4d/, "const uint8_t *src_ptr, int src_stride, const uint8_t * const ref_ptr[], int ref_stride, uint32_t *sad_array";

-specialize qw/vpx_sad4x8x4d msa sse2/;

+specialize qw/vpx_sad4x8x4d neon msa sse2/;

 add_proto qw/void vpx_sad4x4x4d/, "const uint8_t *src_ptr, int src_stride, const uint8_t * const ref_ptr[], int ref_stride, uint32_t *sad_array";

-specialize qw/vpx_sad4x4x4d msa sse2/;

+specialize qw/vpx_sad4x4x4d neon msa sse2/;

 add_proto qw/uint64_t vpx_sum_squares_2d_i16/, "const int16_t *src, int stride, int size";

 specialize qw/vpx_sum_squares_2d_i16 sse2 msa/;

-- 

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