1 files changed, 90 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/third_party/libyuv/source/compare_neon64.cc b/media/libvpx/libvpx/third_party/libyuv/source/compare_neon64.cc
new file mode 100644
index 0000000000..6e8f672ab7
--- /dev/null
+++ b/media/libvpx/libvpx/third_party/libyuv/source/compare_neon64.cc
@@ -0,0 +1,90 @@
+/*
+ *  Copyright 2012 The LibYuv Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS. All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "libyuv/basic_types.h"
+
+#include "libyuv/compare_row.h"
+#include "libyuv/row.h"
+
+#ifdef __cplusplus
+namespace libyuv {
+extern "C" {
+#endif
+
+#if !defined(LIBYUV_DISABLE_NEON) && defined(__aarch64__)
+
+// 256 bits at a time
+// uses short accumulator which restricts count to 131 KB
+uint32_t HammingDistance_NEON(const uint8_t* src_a,
+                              const uint8_t* src_b,
+                              int count) {
+  uint32_t diff;
+  asm volatile(
+      "movi       v4.8h, #0                      \n"
+
+      "1:                                        \n"
+      "ld1        {v0.16b, v1.16b}, [%0], #32    \n"
+      "ld1        {v2.16b, v3.16b}, [%1], #32    \n"
+      "eor        v0.16b, v0.16b, v2.16b         \n"
+      "eor        v1.16b, v1.16b, v3.16b         \n"
+      "cnt        v0.16b, v0.16b                 \n"
+      "cnt        v1.16b, v1.16b                 \n"
+      "subs       %w2, %w2, #32                  \n"
+      "add        v0.16b, v0.16b, v1.16b         \n"
+      "uadalp     v4.8h, v0.16b                  \n"
+      "b.gt       1b                             \n"
+
+      "uaddlv     s4, v4.8h                      \n"
+      "fmov       %w3, s4                        \n"
+      : "+r"(src_a), "+r"(src_b), "+r"(count), "=r"(diff)
+      :
+      : "cc", "v0", "v1", "v2", "v3", "v4");
+  return diff;
+}
+
+uint32_t SumSquareError_NEON(const uint8_t* src_a,
+                             const uint8_t* src_b,
+                             int count) {
+  uint32_t sse;
+  asm volatile(
+      "eor        v16.16b, v16.16b, v16.16b      \n"
+      "eor        v18.16b, v18.16b, v18.16b      \n"
+      "eor        v17.16b, v17.16b, v17.16b      \n"
+      "eor        v19.16b, v19.16b, v19.16b      \n"
+
+      "1:                                        \n"
+      "ld1        {v0.16b}, [%0], #16            \n"
+      "ld1        {v1.16b}, [%1], #16            \n"
+      "subs       %w2, %w2, #16                  \n"
+      "usubl      v2.8h, v0.8b, v1.8b            \n"
+      "usubl2     v3.8h, v0.16b, v1.16b          \n"
+      "smlal      v16.4s, v2.4h, v2.4h           \n"
+      "smlal      v17.4s, v3.4h, v3.4h           \n"
+      "smlal2     v18.4s, v2.8h, v2.8h           \n"
+      "smlal2     v19.4s, v3.8h, v3.8h           \n"
+      "b.gt       1b                             \n"
+
+      "add        v16.4s, v16.4s, v17.4s         \n"
+      "add        v18.4s, v18.4s, v19.4s         \n"
+      "add        v19.4s, v16.4s, v18.4s         \n"
+      "addv       s0, v19.4s                     \n"
+      "fmov       %w3, s0                        \n"
+      : "+r"(src_a), "+r"(src_b), "+r"(count), "=r"(sse)
+      :
+      : "cc", "v0", "v1", "v2", "v3", "v16", "v17", "v18", "v19");
+  return sse;
+}
+
+#endif  // !defined(LIBYUV_DISABLE_NEON) && defined(__aarch64__)
+
+#ifdef __cplusplus
+}  // extern "C"
+}  // namespace libyuv
+#endif