1 files changed, 65 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vpx_dsp/arm/avg_pred_neon.c b/media/libvpx/libvpx/vpx_dsp/arm/avg_pred_neon.c
new file mode 100644
index 0000000000..5afdece0ab
--- /dev/null
+++ b/media/libvpx/libvpx/vpx_dsp/arm/avg_pred_neon.c
@@ -0,0 +1,65 @@
+/*
+ *  Copyright (c) 2017 The WebM 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 <arm_neon.h>
+#include <assert.h>
+
+#include "./vpx_dsp_rtcd.h"
+#include "vpx_dsp/arm/mem_neon.h"
+
+void vpx_comp_avg_pred_neon(uint8_t *comp, const uint8_t *pred, int width,
+                            int height, const uint8_t *ref, int ref_stride) {
+  if (width > 8) {
+    int x, y = height;
+    do {
+      for (x = 0; x < width; x += 16) {
+        const uint8x16_t p = vld1q_u8(pred + x);
+        const uint8x16_t r = vld1q_u8(ref + x);
+        const uint8x16_t avg = vrhaddq_u8(p, r);
+        vst1q_u8(comp + x, avg);
+      }
+      comp += width;
+      pred += width;
+      ref += ref_stride;
+    } while (--y);
+  } else if (width == 8) {
+    int i = width * height;
+    do {
+      const uint8x16_t p = vld1q_u8(pred);
+      uint8x16_t r;
+      const uint8x8_t r_0 = vld1_u8(ref);
+      const uint8x8_t r_1 = vld1_u8(ref + ref_stride);
+      r = vcombine_u8(r_0, r_1);
+      ref += 2 * ref_stride;
+      r = vrhaddq_u8(r, p);
+      vst1q_u8(comp, r);
+
+      pred += 16;
+      comp += 16;
+      i -= 16;
+    } while (i);
+  } else {
+    int i = width * height;
+    assert(width == 4);
+    do {
+      const uint8x16_t p = vld1q_u8(pred);
+      uint8x16_t r;
+
+      r = load_unaligned_u8q(ref, ref_stride);
+      ref += 4 * ref_stride;
+      r = vrhaddq_u8(r, p);
+      vst1q_u8(comp, r);
+
+      pred += 16;
+      comp += 16;
+      i -= 16;
+    } while (i);
+  }
+}