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/*
* Copyright (c) 2011 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.
*/
/*
* This file contains the function WebRtcSpl_SubSatW32().
* The description header can be found in signal_processing_library.h
*
*/
#include "signal_processing_library.h"
#ifndef SPL_NO_DOUBLE_IMPLEMENTATIONS
WebRtc_Word32 WebRtcSpl_SubSatW32(WebRtc_Word32 var1, WebRtc_Word32 var2)
{
WebRtc_Word32 l_diff;
// perform subtraction
l_diff = var1 - var2;
// check for underflow
if ((var1 < 0) && (var2 > 0) && (l_diff > 0))
l_diff = (WebRtc_Word32)0x80000000;
// check for overflow
if ((var1 > 0) && (var2 < 0) && (l_diff < 0))
l_diff = (WebRtc_Word32)0x7FFFFFFF;
return l_diff;
}
#endif
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