1 files changed, 108 insertions, 0 deletions
diff --git a/media/libaom/src/aom_dsp/x86/subtract_avx2.c b/media/libaom/src/aom_dsp/x86/subtract_avx2.c
new file mode 100644
index 0000000000..4389d123db
--- /dev/null
+++ b/media/libaom/src/aom_dsp/x86/subtract_avx2.c
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2018, 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 <immintrin.h>
+
+#include "config/aom_dsp_rtcd.h"
+
+static INLINE void subtract32_avx2(int16_t *diff_ptr, const uint8_t *src_ptr,
+                                   const uint8_t *pred_ptr) {
+  __m256i s = _mm256_lddqu_si256((__m256i *)(src_ptr));
+  __m256i p = _mm256_lddqu_si256((__m256i *)(pred_ptr));
+  __m256i s_0 = _mm256_cvtepu8_epi16(_mm256_castsi256_si128(s));
+  __m256i s_1 = _mm256_cvtepu8_epi16(_mm256_extracti128_si256(s, 1));
+  __m256i p_0 = _mm256_cvtepu8_epi16(_mm256_castsi256_si128(p));
+  __m256i p_1 = _mm256_cvtepu8_epi16(_mm256_extracti128_si256(p, 1));
+  const __m256i d_0 = _mm256_sub_epi16(s_0, p_0);
+  const __m256i d_1 = _mm256_sub_epi16(s_1, p_1);
+  _mm256_store_si256((__m256i *)(diff_ptr), d_0);
+  _mm256_store_si256((__m256i *)(diff_ptr + 16), d_1);
+}
+
+static INLINE void aom_subtract_block_16xn_avx2(
+    int rows, int16_t *diff_ptr, ptrdiff_t diff_stride, const uint8_t *src_ptr,
+    ptrdiff_t src_stride, const uint8_t *pred_ptr, ptrdiff_t pred_stride) {
+  for (int32_t j = 0; j < rows; ++j) {
+    __m128i s = _mm_lddqu_si128((__m128i *)(src_ptr));
+    __m128i p = _mm_lddqu_si128((__m128i *)(pred_ptr));
+    __m256i s_0 = _mm256_cvtepu8_epi16(s);
+    __m256i p_0 = _mm256_cvtepu8_epi16(p);
+    const __m256i d_0 = _mm256_sub_epi16(s_0, p_0);
+    _mm256_store_si256((__m256i *)(diff_ptr), d_0);
+    src_ptr += src_stride;
+    pred_ptr += pred_stride;
+    diff_ptr += diff_stride;
+  }
+}
+
+static INLINE void aom_subtract_block_32xn_avx2(
+    int rows, int16_t *diff_ptr, ptrdiff_t diff_stride, const uint8_t *src_ptr,
+    ptrdiff_t src_stride, const uint8_t *pred_ptr, ptrdiff_t pred_stride) {
+  for (int32_t j = 0; j < rows; ++j) {
+    subtract32_avx2(diff_ptr, src_ptr, pred_ptr);
+    src_ptr += src_stride;
+    pred_ptr += pred_stride;
+    diff_ptr += diff_stride;
+  }
+}
+
+static INLINE void aom_subtract_block_64xn_avx2(
+    int rows, int16_t *diff_ptr, ptrdiff_t diff_stride, const uint8_t *src_ptr,
+    ptrdiff_t src_stride, const uint8_t *pred_ptr, ptrdiff_t pred_stride) {
+  for (int32_t j = 0; j < rows; ++j) {
+    subtract32_avx2(diff_ptr, src_ptr, pred_ptr);
+    subtract32_avx2(diff_ptr + 32, src_ptr + 32, pred_ptr + 32);
+    src_ptr += src_stride;
+    pred_ptr += pred_stride;
+    diff_ptr += diff_stride;
+  }
+}
+
+static INLINE void aom_subtract_block_128xn_avx2(
+    int rows, int16_t *diff_ptr, ptrdiff_t diff_stride, const uint8_t *src_ptr,
+    ptrdiff_t src_stride, const uint8_t *pred_ptr, ptrdiff_t pred_stride) {
+  for (int32_t j = 0; j < rows; ++j) {
+    subtract32_avx2(diff_ptr, src_ptr, pred_ptr);
+    subtract32_avx2(diff_ptr + 32, src_ptr + 32, pred_ptr + 32);
+    subtract32_avx2(diff_ptr + 64, src_ptr + 64, pred_ptr + 64);
+    subtract32_avx2(diff_ptr + 96, src_ptr + 96, pred_ptr + 96);
+    src_ptr += src_stride;
+    pred_ptr += pred_stride;
+    diff_ptr += diff_stride;
+  }
+}
+
+void aom_subtract_block_avx2(int rows, int cols, int16_t *diff_ptr,
+                             ptrdiff_t diff_stride, const uint8_t *src_ptr,
+                             ptrdiff_t src_stride, const uint8_t *pred_ptr,
+                             ptrdiff_t pred_stride) {
+  switch (cols) {
+    case 16:
+      aom_subtract_block_16xn_avx2(rows, diff_ptr, diff_stride, src_ptr,
+                                   src_stride, pred_ptr, pred_stride);
+      break;
+    case 32:
+      aom_subtract_block_32xn_avx2(rows, diff_ptr, diff_stride, src_ptr,
+                                   src_stride, pred_ptr, pred_stride);
+      break;
+    case 64:
+      aom_subtract_block_64xn_avx2(rows, diff_ptr, diff_stride, src_ptr,
+                                   src_stride, pred_ptr, pred_stride);
+      break;
+    case 128:
+      aom_subtract_block_128xn_avx2(rows, diff_ptr, diff_stride, src_ptr,
+                                    src_stride, pred_ptr, pred_stride);
+      break;
+    default:
+      aom_subtract_block_sse2(rows, cols, diff_ptr, diff_stride, src_ptr,
+                              src_stride, pred_ptr, pred_stride);
+      break;
+  }
+}