1 files changed, 62 insertions, 0 deletions
diff --git a/third_party/aom/aom_dsp/arm/avg_sve.c b/third_party/aom/aom_dsp/arm/avg_sve.c
new file mode 100644
index 0000000000..bbf5a9447c
--- /dev/null
+++ b/third_party/aom/aom_dsp/arm/avg_sve.c
@@ -0,0 +1,62 @@
+/*
+ *  Copyright (c) 2023, Alliance for Open Media. 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 "config/aom_config.h"
+#include "config/aom_dsp_rtcd.h"
+#include "aom/aom_integer.h"
+#include "aom_dsp/arm/dot_sve.h"
+#include "aom_dsp/arm/mem_neon.h"
+#include "aom_ports/mem.h"
+
+int aom_vector_var_sve(const int16_t *ref, const int16_t *src, int bwl) {
+  assert(bwl >= 2 && bwl <= 5);
+  int width = 4 << bwl;
+
+  int64x2_t sse_s64[2] = { vdupq_n_s64(0), vdupq_n_s64(0) };
+  int16x8_t v_mean[2] = { vdupq_n_s16(0), vdupq_n_s16(0) };
+
+  do {
+    int16x8_t r0 = vld1q_s16(ref);
+    int16x8_t s0 = vld1q_s16(src);
+
+    // diff: dynamic range [-510, 510] 10 (signed) bits.
+    int16x8_t diff0 = vsubq_s16(r0, s0);
+    // v_mean: dynamic range 16 * diff -> [-8160, 8160], 14 (signed) bits.
+    v_mean[0] = vaddq_s16(v_mean[0], diff0);
+
+    // v_sse: dynamic range 2 * 16 * diff^2 -> [0, 8,323,200], 24 (signed) bits.
+    sse_s64[0] = aom_sdotq_s16(sse_s64[0], diff0, diff0);
+
+    int16x8_t r1 = vld1q_s16(ref + 8);
+    int16x8_t s1 = vld1q_s16(src + 8);
+
+    // diff: dynamic range [-510, 510] 10 (signed) bits.
+    int16x8_t diff1 = vsubq_s16(r1, s1);
+    // v_mean: dynamic range 16 * diff -> [-8160, 8160], 14 (signed) bits.
+    v_mean[1] = vaddq_s16(v_mean[1], diff1);
+
+    // v_sse: dynamic range 2 * 16 * diff^2 -> [0, 8,323,200], 24 (signed) bits.
+    sse_s64[1] = aom_sdotq_s16(sse_s64[1], diff1, diff1);
+
+    ref += 16;
+    src += 16;
+    width -= 16;
+  } while (width != 0);
+
+  // Dynamic range [0, 65280], 16 (unsigned) bits.
+  const uint32_t mean_abs = abs(vaddlvq_s16(vaddq_s16(v_mean[0], v_mean[1])));
+  const int64_t sse = vaddvq_s64(vaddq_s64(sse_s64[0], sse_s64[1]));
+
+  // (mean_abs * mean_abs): dynamic range 32 (unsigned) bits.
+  return (int)(sse - ((mean_abs * mean_abs) >> (bwl + 2)));
+}