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Diffstat (limited to '')
-rw-r--r-- | third_party/aom/aom_dsp/arm/avg_sve.c | 62 |
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))); +} |