92 lines
2.5 KiB
C
92 lines
2.5 KiB
C
/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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/*
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* This file contains the function WebRtcSpl_DotProductWithScale().
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* The description header can be found in signal_processing_library.h
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*
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*/
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#include "signal_processing_library.h"
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WebRtc_Word32 WebRtcSpl_DotProductWithScale(WebRtc_Word16 *vector1, WebRtc_Word16 *vector2,
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int length, int scaling)
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{
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WebRtc_Word32 sum;
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int i;
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#ifdef _ARM_OPT_
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#pragma message("NOTE: _ARM_OPT_ optimizations are used")
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WebRtc_Word16 len4 = (length >> 2) << 2;
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#endif
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sum = 0;
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#ifndef _ARM_OPT_
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for (i = 0; i < length; i++)
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{
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sum += WEBRTC_SPL_MUL_16_16_RSFT(*vector1++, *vector2++, scaling);
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}
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#else
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if (scaling == 0)
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{
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for (i = 0; i < len4; i = i + 4)
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{
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sum += WEBRTC_SPL_MUL_16_16(*vector1, *vector2);
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vector1++;
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vector2++;
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sum += WEBRTC_SPL_MUL_16_16(*vector1, *vector2);
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vector1++;
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vector2++;
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sum += WEBRTC_SPL_MUL_16_16(*vector1, *vector2);
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vector1++;
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vector2++;
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sum += WEBRTC_SPL_MUL_16_16(*vector1, *vector2);
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vector1++;
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vector2++;
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}
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for (i = len4; i < length; i++)
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{
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sum += WEBRTC_SPL_MUL_16_16(*vector1, *vector2);
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vector1++;
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vector2++;
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}
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}
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else
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{
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for (i = 0; i < len4; i = i + 4)
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{
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sum += WEBRTC_SPL_MUL_16_16_RSFT(*vector1, *vector2, scaling);
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vector1++;
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vector2++;
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sum += WEBRTC_SPL_MUL_16_16_RSFT(*vector1, *vector2, scaling);
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vector1++;
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vector2++;
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sum += WEBRTC_SPL_MUL_16_16_RSFT(*vector1, *vector2, scaling);
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vector1++;
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vector2++;
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sum += WEBRTC_SPL_MUL_16_16_RSFT(*vector1, *vector2, scaling);
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vector1++;
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vector2++;
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}
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for (i = len4; i < length; i++)
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{
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sum += WEBRTC_SPL_MUL_16_16_RSFT(*vector1, *vector2, scaling);
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vector1++;
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vector2++;
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}
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}
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#endif
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return sum;
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}
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