1 files changed, 58 insertions, 0 deletions
diff --git a/third_party/aom/aom_dsp/x86/obmc_intrinsic_sse4.h b/third_party/aom/aom_dsp/x86/obmc_intrinsic_sse4.h
new file mode 100644
index 0000000000..5181e444c0
--- /dev/null
+++ b/third_party/aom/aom_dsp/x86/obmc_intrinsic_sse4.h
@@ -0,0 +1,58 @@
+/*
+ * 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.
+ */
+
+#ifndef AOM_AOM_DSP_X86_OBMC_INTRINSIC_SSE4_H_
+#define AOM_AOM_DSP_X86_OBMC_INTRINSIC_SSE4_H_
+
+#include <smmintrin.h>
+
+#include "aom_dsp/x86/obmc_intrinsic_ssse3.h"
+
+static INLINE void obmc_variance_w4(const uint8_t *pre, const int pre_stride,
+                                    const int32_t *wsrc, const int32_t *mask,
+                                    unsigned int *const sse, int *const sum,
+                                    const int h) {
+  const int pre_step = pre_stride - 4;
+  int n = 0;
+  __m128i v_sum_d = _mm_setzero_si128();
+  __m128i v_sse_d = _mm_setzero_si128();
+
+  assert(IS_POWER_OF_TWO(h));
+
+  do {
+    const __m128i v_p_b = _mm_cvtsi32_si128(*(const uint32_t *)(pre + n));
+    const __m128i v_m_d = _mm_load_si128((const __m128i *)(mask + n));
+    const __m128i v_w_d = _mm_load_si128((const __m128i *)(wsrc + n));
+
+    const __m128i v_p_d = _mm_cvtepu8_epi32(v_p_b);
+
+    // Values in both pre and mask fit in 15 bits, and are packed at 32 bit
+    // boundaries. We use pmaddwd, as it has lower latency on Haswell
+    // than pmulld but produces the same result with these inputs.
+    const __m128i v_pm_d = _mm_madd_epi16(v_p_d, v_m_d);
+
+    const __m128i v_diff_d = _mm_sub_epi32(v_w_d, v_pm_d);
+    const __m128i v_rdiff_d = xx_roundn_epi32(v_diff_d, 12);
+    const __m128i v_sqrdiff_d = _mm_mullo_epi32(v_rdiff_d, v_rdiff_d);
+
+    v_sum_d = _mm_add_epi32(v_sum_d, v_rdiff_d);
+    v_sse_d = _mm_add_epi32(v_sse_d, v_sqrdiff_d);
+
+    n += 4;
+
+    if (n % 4 == 0) pre += pre_step;
+  } while (n < 4 * h);
+
+  *sum = xx_hsum_epi32_si32(v_sum_d);
+  *sse = xx_hsum_epi32_si32(v_sse_d);
+}
+
+#endif  // AOM_AOM_DSP_X86_OBMC_INTRINSIC_SSE4_H_