1 files changed, 137 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vpx_dsp/arm/subtract_neon.c b/media/libvpx/libvpx/vpx_dsp/arm/subtract_neon.c
new file mode 100644
index 0000000000..2c008e48ab
--- /dev/null
+++ b/media/libvpx/libvpx/vpx_dsp/arm/subtract_neon.c
@@ -0,0 +1,137 @@
+/*
+ *  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>
+#include <assert.h>
+
+#include "./vpx_config.h"
+#include "./vpx_dsp_rtcd.h"
+#include "vpx/vpx_integer.h"
+#include "vpx_dsp/arm/mem_neon.h"
+
+void vpx_subtract_block_neon(int rows, int cols, int16_t *diff,
+                             ptrdiff_t diff_stride, const uint8_t *src,
+                             ptrdiff_t src_stride, const uint8_t *pred,
+                             ptrdiff_t pred_stride) {
+  int r = rows, c;
+
+  if (cols > 16) {
+    do {
+      for (c = 0; c < cols; c += 32) {
+        const uint8x16_t s0 = vld1q_u8(&src[c + 0]);
+        const uint8x16_t s1 = vld1q_u8(&src[c + 16]);
+        const uint8x16_t p0 = vld1q_u8(&pred[c + 0]);
+        const uint8x16_t p1 = vld1q_u8(&pred[c + 16]);
+        const uint16x8_t d0 = vsubl_u8(vget_low_u8(s0), vget_low_u8(p0));
+        const uint16x8_t d1 = vsubl_u8(vget_high_u8(s0), vget_high_u8(p0));
+        const uint16x8_t d2 = vsubl_u8(vget_low_u8(s1), vget_low_u8(p1));
+        const uint16x8_t d3 = vsubl_u8(vget_high_u8(s1), vget_high_u8(p1));
+        vst1q_s16(&diff[c + 0], vreinterpretq_s16_u16(d0));
+        vst1q_s16(&diff[c + 8], vreinterpretq_s16_u16(d1));
+        vst1q_s16(&diff[c + 16], vreinterpretq_s16_u16(d2));
+        vst1q_s16(&diff[c + 24], vreinterpretq_s16_u16(d3));
+      }
+      diff += diff_stride;
+      pred += pred_stride;
+      src += src_stride;
+    } while (--r);
+  } else if (cols > 8) {
+    do {
+      const uint8x16_t s = vld1q_u8(&src[0]);
+      const uint8x16_t p = vld1q_u8(&pred[0]);
+      const uint16x8_t d0 = vsubl_u8(vget_low_u8(s), vget_low_u8(p));
+      const uint16x8_t d1 = vsubl_u8(vget_high_u8(s), vget_high_u8(p));
+      vst1q_s16(&diff[0], vreinterpretq_s16_u16(d0));
+      vst1q_s16(&diff[8], vreinterpretq_s16_u16(d1));
+      diff += diff_stride;
+      pred += pred_stride;
+      src += src_stride;
+    } while (--r);
+  } else if (cols > 4) {
+    do {
+      const uint8x8_t s = vld1_u8(&src[0]);
+      const uint8x8_t p = vld1_u8(&pred[0]);
+      const uint16x8_t v_diff = vsubl_u8(s, p);
+      vst1q_s16(&diff[0], vreinterpretq_s16_u16(v_diff));
+      diff += diff_stride;
+      pred += pred_stride;
+      src += src_stride;
+    } while (--r);
+  } else {
+    assert(cols == 4);
+    do {
+      const uint8x8_t s = load_unaligned_u8(src, (int)src_stride);
+      const uint8x8_t p = load_unaligned_u8(pred, (int)pred_stride);
+      const uint16x8_t d = vsubl_u8(s, p);
+      vst1_s16(diff + 0 * diff_stride, vreinterpret_s16_u16(vget_low_u16(d)));
+      vst1_s16(diff + 1 * diff_stride, vreinterpret_s16_u16(vget_high_u16(d)));
+      diff += 2 * diff_stride;
+      pred += 2 * pred_stride;
+      src += 2 * src_stride;
+      r -= 2;
+    } while (r);
+  }
+}
+
+#if CONFIG_VP9_HIGHBITDEPTH
+void vpx_highbd_subtract_block_neon(int rows, int cols, int16_t *diff_ptr,
+                                    ptrdiff_t diff_stride,
+                                    const uint8_t *src8_ptr,
+                                    ptrdiff_t src_stride,
+                                    const uint8_t *pred8_ptr,
+                                    ptrdiff_t pred_stride, int bd) {
+  int r = rows, c;
+  uint16_t *src = CONVERT_TO_SHORTPTR(src8_ptr);
+  uint16_t *pred = CONVERT_TO_SHORTPTR(pred8_ptr);
+  (void)bd;
+
+  if (cols >= 16) {
+    do {
+      for (c = 0; c < cols; c += 16) {
+        const uint16x8_t s0 = vld1q_u16(&src[c + 0]);
+        const uint16x8_t s1 = vld1q_u16(&src[c + 8]);
+        const uint16x8_t p0 = vld1q_u16(&pred[c + 0]);
+        const uint16x8_t p1 = vld1q_u16(&pred[c + 8]);
+        const uint16x8_t d0 = vsubq_u16(s0, p0);
+        const uint16x8_t d1 = vsubq_u16(s1, p1);
+        vst1q_s16(&diff_ptr[c + 0], vreinterpretq_s16_u16(d0));
+        vst1q_s16(&diff_ptr[c + 8], vreinterpretq_s16_u16(d1));
+      }
+      diff_ptr += diff_stride;
+      pred += pred_stride;
+      src += src_stride;
+    } while (--r);
+  } else if (cols >= 8) {
+    do {
+      for (c = 0; c < cols; c += 8) {
+        const uint16x8_t s = vld1q_u16(&src[c]);
+        const uint16x8_t p = vld1q_u16(&pred[c]);
+        const uint16x8_t d0 = vsubq_u16(s, p);
+        vst1q_s16(&diff_ptr[c], vreinterpretq_s16_u16(d0));
+      }
+      diff_ptr += diff_stride;
+      pred += pred_stride;
+      src += src_stride;
+    } while (--r);
+  } else if (cols >= 4) {
+    do {
+      for (c = 0; c < cols; c += 4) {
+        const uint16x4_t s = vld1_u16(&src[c]);
+        const uint16x4_t p = vld1_u16(&pred[c]);
+        const uint16x4_t v_diff = vsub_u16(s, p);
+        vst1_s16(&diff_ptr[c], vreinterpret_s16_u16(v_diff));
+      }
+      diff_ptr += diff_stride;
+      pred += pred_stride;
+      src += src_stride;
+    } while (--r);
+  }
+}
+#endif  // CONFIG_VP9_HIGHBITDEPTH