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-rw-r--r--third_party/aom/aom_dsp/arm/subtract_neon.c80
1 files changed, 80 insertions, 0 deletions
diff --git a/third_party/aom/aom_dsp/arm/subtract_neon.c b/third_party/aom/aom_dsp/arm/subtract_neon.c
new file mode 100644
index 000000000..cb8a2daf8
--- /dev/null
+++ b/third_party/aom/aom_dsp/arm/subtract_neon.c
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#include <arm_neon.h>
+
+#include "./aom_config.h"
+#include "aom/aom_integer.h"
+
+void aom_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, c;
+
+ if (cols > 16) {
+ for (r = 0; r < rows; ++r) {
+ for (c = 0; c < cols; c += 32) {
+ const uint8x16_t v_src_00 = vld1q_u8(&src[c + 0]);
+ const uint8x16_t v_src_16 = vld1q_u8(&src[c + 16]);
+ const uint8x16_t v_pred_00 = vld1q_u8(&pred[c + 0]);
+ const uint8x16_t v_pred_16 = vld1q_u8(&pred[c + 16]);
+ const uint16x8_t v_diff_lo_00 =
+ vsubl_u8(vget_low_u8(v_src_00), vget_low_u8(v_pred_00));
+ const uint16x8_t v_diff_hi_00 =
+ vsubl_u8(vget_high_u8(v_src_00), vget_high_u8(v_pred_00));
+ const uint16x8_t v_diff_lo_16 =
+ vsubl_u8(vget_low_u8(v_src_16), vget_low_u8(v_pred_16));
+ const uint16x8_t v_diff_hi_16 =
+ vsubl_u8(vget_high_u8(v_src_16), vget_high_u8(v_pred_16));
+ vst1q_s16(&diff[c + 0], vreinterpretq_s16_u16(v_diff_lo_00));
+ vst1q_s16(&diff[c + 8], vreinterpretq_s16_u16(v_diff_hi_00));
+ vst1q_s16(&diff[c + 16], vreinterpretq_s16_u16(v_diff_lo_16));
+ vst1q_s16(&diff[c + 24], vreinterpretq_s16_u16(v_diff_hi_16));
+ }
+ diff += diff_stride;
+ pred += pred_stride;
+ src += src_stride;
+ }
+ } else if (cols > 8) {
+ for (r = 0; r < rows; ++r) {
+ const uint8x16_t v_src = vld1q_u8(&src[0]);
+ const uint8x16_t v_pred = vld1q_u8(&pred[0]);
+ const uint16x8_t v_diff_lo =
+ vsubl_u8(vget_low_u8(v_src), vget_low_u8(v_pred));
+ const uint16x8_t v_diff_hi =
+ vsubl_u8(vget_high_u8(v_src), vget_high_u8(v_pred));
+ vst1q_s16(&diff[0], vreinterpretq_s16_u16(v_diff_lo));
+ vst1q_s16(&diff[8], vreinterpretq_s16_u16(v_diff_hi));
+ diff += diff_stride;
+ pred += pred_stride;
+ src += src_stride;
+ }
+ } else if (cols > 4) {
+ for (r = 0; r < rows; ++r) {
+ const uint8x8_t v_src = vld1_u8(&src[0]);
+ const uint8x8_t v_pred = vld1_u8(&pred[0]);
+ const uint16x8_t v_diff = vsubl_u8(v_src, v_pred);
+ vst1q_s16(&diff[0], vreinterpretq_s16_u16(v_diff));
+ diff += diff_stride;
+ pred += pred_stride;
+ src += src_stride;
+ }
+ } else {
+ for (r = 0; r < rows; ++r) {
+ for (c = 0; c < cols; ++c) diff[c] = src[c] - pred[c];
+
+ diff += diff_stride;
+ pred += pred_stride;
+ src += src_stride;
+ }
+ }
+}