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/*
* Copyright (c) 2020 The WebRTC project authors. 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 <immintrin.h>
#include "modules/audio_processing/aec3/adaptive_fir_filter_erl.h"
namespace webrtc {
namespace aec3 {
// Computes and stores the echo return loss estimate of the filter, which is the
// sum of the partition frequency responses.
void ErlComputer_AVX2(
const std::vector<std::array<float, kFftLengthBy2Plus1>>& H2,
rtc::ArrayView<float> erl) {
std::fill(erl.begin(), erl.end(), 0.f);
for (auto& H2_j : H2) {
for (size_t k = 0; k < kFftLengthBy2; k += 8) {
const __m256 H2_j_k = _mm256_loadu_ps(&H2_j[k]);
__m256 erl_k = _mm256_loadu_ps(&erl[k]);
erl_k = _mm256_add_ps(erl_k, H2_j_k);
_mm256_storeu_ps(&erl[k], erl_k);
}
erl[kFftLengthBy2] += H2_j[kFftLengthBy2];
}
}
} // namespace aec3
} // namespace webrtc
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