1 files changed, 65 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vpx_dsp/arm/idct8x8_1_add_neon.c b/media/libvpx/libvpx/vpx_dsp/arm/idct8x8_1_add_neon.c
new file mode 100644
index 0000000000..ce9b459589
--- /dev/null
+++ b/media/libvpx/libvpx/vpx_dsp/arm/idct8x8_1_add_neon.c
@@ -0,0 +1,65 @@
+/*
+ *  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 "./vpx_dsp_rtcd.h"
+#include "vpx_dsp/inv_txfm.h"
+
+static INLINE uint8x8_t create_dcd(const int16_t dc) {
+  int16x8_t t = vdupq_n_s16(dc);
+  return vqmovun_s16(t);
+}
+
+static INLINE void idct8x8_1_add_pos_kernel(uint8_t **dest, const int stride,
+                                            const uint8x8_t res) {
+  const uint8x8_t a = vld1_u8(*dest);
+  const uint8x8_t b = vqadd_u8(a, res);
+  vst1_u8(*dest, b);
+  *dest += stride;
+}
+
+static INLINE void idct8x8_1_add_neg_kernel(uint8_t **dest, const int stride,
+                                            const uint8x8_t res) {
+  const uint8x8_t a = vld1_u8(*dest);
+  const uint8x8_t b = vqsub_u8(a, res);
+  vst1_u8(*dest, b);
+  *dest += stride;
+}
+
+void vpx_idct8x8_1_add_neon(const tran_low_t *input, uint8_t *dest,
+                            int stride) {
+  const int16_t out0 =
+      WRAPLOW(dct_const_round_shift((int16_t)input[0] * cospi_16_64));
+  const int16_t out1 = WRAPLOW(dct_const_round_shift(out0 * cospi_16_64));
+  const int16_t a1 = ROUND_POWER_OF_TWO(out1, 5);
+
+  if (a1 >= 0) {
+    const uint8x8_t dc = create_dcd(a1);
+    idct8x8_1_add_pos_kernel(&dest, stride, dc);
+    idct8x8_1_add_pos_kernel(&dest, stride, dc);
+    idct8x8_1_add_pos_kernel(&dest, stride, dc);
+    idct8x8_1_add_pos_kernel(&dest, stride, dc);
+    idct8x8_1_add_pos_kernel(&dest, stride, dc);
+    idct8x8_1_add_pos_kernel(&dest, stride, dc);
+    idct8x8_1_add_pos_kernel(&dest, stride, dc);
+    idct8x8_1_add_pos_kernel(&dest, stride, dc);
+  } else {
+    const uint8x8_t dc = create_dcd(-a1);
+    idct8x8_1_add_neg_kernel(&dest, stride, dc);
+    idct8x8_1_add_neg_kernel(&dest, stride, dc);
+    idct8x8_1_add_neg_kernel(&dest, stride, dc);
+    idct8x8_1_add_neg_kernel(&dest, stride, dc);
+    idct8x8_1_add_neg_kernel(&dest, stride, dc);
+    idct8x8_1_add_neg_kernel(&dest, stride, dc);
+    idct8x8_1_add_neg_kernel(&dest, stride, dc);
+    idct8x8_1_add_neg_kernel(&dest, stride, dc);
+  }
+}