shithub: libvpx

Download patch

ref: 4959dd3eb36308aa9d94ba4feb6305e8b3f9148b
parent: cf75ab6ccd8d100208bf2140b0d68f4669416358
author: Johann <johannkoenig@google.com>
date: Thu Jun 22 14:12:28 EDT 2017 

partial fdct neon: add 4x4_1

BUG=webm:1424

Change-Id: Ib0f3cfd6116fc1f5a99acb8bfd76e25b90177ffc


--- a/test/dct_partial_test.cc
+++ b/test/dct_partial_test.cc
@@ -144,11 +144,13 @@
     NEON, PartialFdctTest,
     ::testing::Values(make_tuple(&vpx_fdct8x8_1_neon, 8, VPX_BITS_12),
                       make_tuple(&vpx_fdct8x8_1_neon, 8, VPX_BITS_10),
-                      make_tuple(&vpx_fdct8x8_1_neon, 8, VPX_BITS_8)));
+                      make_tuple(&vpx_fdct8x8_1_neon, 8, VPX_BITS_8),
+                      make_tuple(&vpx_fdct4x4_1_neon, 4, VPX_BITS_8)));
 #else
-INSTANTIATE_TEST_CASE_P(NEON, PartialFdctTest,
-                        ::testing::Values(make_tuple(&vpx_fdct8x8_1_neon, 8,
-                                                     VPX_BITS_8)));
+INSTANTIATE_TEST_CASE_P(
+    NEON, PartialFdctTest,
+    ::testing::Values(make_tuple(&vpx_fdct8x8_1_neon, 8, VPX_BITS_8),
+                      make_tuple(&vpx_fdct4x4_1_neon, 4, VPX_BITS_8)));
 #endif  // CONFIG_VP9_HIGHBITDEPTH
 #endif  // HAVE_NEON
 
--- a/vpx_dsp/arm/fdct_partial_neon.c
+++ b/vpx_dsp/arm/fdct_partial_neon.c
@@ -12,7 +12,42 @@
 
 #include "./vpx_dsp_rtcd.h"
 #include "./vpx_config.h"
+#include "vpx_dsp/arm/mem_neon.h"
 
+static INLINE tran_low_t sum_int16x8(const int16x8_t a) {
+  const int32x4_t b = vpaddlq_s16(a);
+  const int64x2_t c = vpaddlq_s32(b);
+  const int32x2_t d = vadd_s32(vreinterpret_s32_s64(vget_low_s64(c)),
+                               vreinterpret_s32_s64(vget_high_s64(c)));
+#if CONFIG_VP9_HIGHBITDEPTH
+  return vget_lane_s32(d, 0);
+#else
+  return vget_lane_s16(vreinterpret_s16_s32(d), 0);
+#endif
+}
+
+void vpx_fdct4x4_1_neon(const int16_t *input, tran_low_t *output, int stride) {
+  int16x4_t a0, a1, a2, a3;
+  int16x8_t b0, b1;
+  int16x8_t c;
+
+  a0 = vld1_s16(input);
+  input += stride;
+  a1 = vld1_s16(input);
+  input += stride;
+  a2 = vld1_s16(input);
+  input += stride;
+  a3 = vld1_s16(input);
+
+  b0 = vcombine_s16(a0, a1);
+  b1 = vcombine_s16(a2, a3);
+
+  c = vaddq_s16(b0, b1);
+
+  output[0] = sum_int16x8(c) << 1;
+  output[1] = 0;
+}
+
 void vpx_fdct8x8_1_neon(const int16_t *input, tran_low_t *output, int stride) {
   int r;
   int16x8_t sum = vld1q_s16(&input[0]);
@@ -20,16 +55,7 @@
     const int16x8_t input_00 = vld1q_s16(&input[r * stride]);
     sum = vaddq_s16(sum, input_00);
   }
-  {
-    const int32x4_t a = vpaddlq_s16(sum);
-    const int64x2_t b = vpaddlq_s32(a);
-    const int32x2_t c = vadd_s32(vreinterpret_s32_s64(vget_low_s64(b)),
-                                 vreinterpret_s32_s64(vget_high_s64(b)));
-#if CONFIG_VP9_HIGHBITDEPTH
-    output[0] = vget_lane_s32(c, 0);
-#else
-    output[0] = vget_lane_s16(vreinterpret_s16_s32(c), 0);
-#endif
-    output[1] = 0;
-  }
+
+  output[0] = sum_int16x8(sum);
+  output[1] = 0;
 }
--- a/vpx_dsp/vpx_dsp_rtcd_defs.pl
+++ b/vpx_dsp/vpx_dsp_rtcd_defs.pl
@@ -487,7 +487,7 @@
   specialize qw/vpx_fdct4x4 neon sse2/;
 
   add_proto qw/void vpx_fdct4x4_1/, "const int16_t *input, tran_low_t *output, int stride";
-  specialize qw/vpx_fdct4x4_1 sse2/;
+  specialize qw/vpx_fdct4x4_1 sse2 neon/;
 
   add_proto qw/void vpx_fdct8x8/, "const int16_t *input, tran_low_t *output, int stride";
   specialize qw/vpx_fdct8x8 neon sse2/;
@@ -537,7 +537,7 @@
   specialize qw/vpx_fdct4x4 neon sse2 msa/;
 
   add_proto qw/void vpx_fdct4x4_1/, "const int16_t *input, tran_low_t *output, int stride";
-  specialize qw/vpx_fdct4x4_1 sse2/;
+  specialize qw/vpx_fdct4x4_1 sse2 neon/;
 
   add_proto qw/void vpx_fdct8x8/, "const int16_t *input, tran_low_t *output, int stride";
   specialize qw/vpx_fdct8x8 sse2 neon msa/, "$ssse3_x86_64";