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/*******************************************************************************
* Copyright 2002-2018 Intel Corporation
* All Rights Reserved.
*
* If this software was obtained under the Intel Simplified Software License,
* the following terms apply:
*
* The source code, information and material ("Material") contained herein is
* owned by Intel Corporation or its suppliers or licensors, and title to such
* Material remains with Intel Corporation or its suppliers or licensors. The
* Material contains proprietary information of Intel or its suppliers and
* licensors. The Material is protected by worldwide copyright laws and treaty
* provisions. No part of the Material may be used, copied, reproduced,
* modified, published, uploaded, posted, transmitted, distributed or disclosed
* in any way without Intel's prior express written permission. No license under
* any patent, copyright or other intellectual property rights in the Material
* is granted to or conferred upon you, either expressly, by implication,
* inducement, estoppel or otherwise. Any license under such intellectual
* property rights must be express and approved by Intel in writing.
*
* Unless otherwise agreed by Intel in writing, you may not remove or alter this
* notice or any other notice embedded in Materials by Intel or Intel's
* suppliers or licensors in any way.
*
*
* If this software was obtained under the Apache License, Version 2.0 (the
* "License"), the following terms apply:
*
* You may not use this file except in compliance with the License. You may
* obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
*
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*
* See the License for the specific language governing permissions and
* limitations under the License.
*******************************************************************************/
/*
// Purpose:
// Intel(R) Integrated Performance Primitives. Cryptography Primitives.
// Internal BNU32 arithmetic.
//
// Contents:
// cpSub_BNU32()
//
*/
#include "owncp.h"
#include "pcpbnumisc.h"
#include "pcpbnu32misc.h"
#include "pcpbnu32arith.h"
/*F*
// Name: cpSub_BNU32
//
// Purpose: substract BNU32.
//
// Returns:
// borrow
//
// Parameters:
// pA source
// pB source
// ns size
// pR result
//
*F*/
Ipp32u cpSub_BNU32(Ipp32u* pR, const Ipp32u* pA, const Ipp32u* pB, cpSize ns)
{
Ipp32u borrow = 0;
cpSize i;
for(i=0; i<ns; i++) {
Ipp64u t = (Ipp64u)(pA[i]) - pB[i] - borrow;
pR[i] = LODWORD(t);
borrow = 0-HIDWORD(t);
}
return borrow;
}
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