libvpx: Pull from upstream

source/libvpx/vp8/common/arm/neon/copymem_neon.c

+/*
+ *  Copyright (c) 2014 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>
+
+void vp8_copy_mem8x4_neon(
+        unsigned char *src,
+        int src_stride,
+        unsigned char *dst,
+        int dst_stride) {
+    uint8x8_t vtmp;
+    int r;
+
+    for (r = 0; r < 4; r++) {
+        vtmp = vld1_u8(src);
+        vst1_u8(dst, vtmp);
+        src += src_stride;
+        dst += dst_stride;
+    }
+}
+
+void vp8_copy_mem8x8_neon(
+        unsigned char *src,
+        int src_stride,
+        unsigned char *dst,
+        int dst_stride) {
+    uint8x8_t vtmp;
+    int r;
+
+    for (r = 0; r < 8; r++) {
+        vtmp = vld1_u8(src);
+        vst1_u8(dst, vtmp);
+        src += src_stride;
+        dst += dst_stride;
+    }
+}
+
+void vp8_copy_mem16x16_neon(
+        unsigned char *src,
+        int src_stride,
+        unsigned char *dst,
+        int dst_stride) {
+    int r;
+    uint8x16_t qtmp;
+
+    for (r = 0; r < 16; r++) {
+        qtmp = vld1q_u8(src);
+        vst1q_u8(dst, qtmp);
+        src += src_stride;
+        dst += dst_stride;
+    }
+}