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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.
*******************************************************************************/
/*
// Intel(R) Integrated Performance Primitives
// Cryptographic Primitives (ippcp)
//
// Contents:
// ippsDiv_BN()
//
*/
#include "owndefs.h"
#include "owncp.h"
#include "pcpbn.h"
#include "pcptool.h"
/*F*
// Name: ippsDiv_BN
//
// Purpose: Divide BigNums.
//
// Returns: Reason:
// ippStsNullPtrErr pA == NULL
// pB == NULL
// pQ == NULL
// pR == NULL
// ippStsContextMatchErr !BN_VALID_ID(pA)
// !BN_VALID_ID(pB)
// !BN_VALID_ID(pQ)
// !BN_VALID_ID(pR)
// ippStsDivByZeroErr BN_SIZE(pB) == 1 && BN_NUMBER(pB)[0] == 0
// ippStsOutOfRangeErr pQ and/or pR can not hold result
// ippStsNoErr no errors
//
// Parameters:
// pA source BigNum
// pB source BigNum
// pQ quotient BigNum
// pR reminder BigNum
//
// A = Q*B + R, 0 <= val(R) < val(B), sgn(A)==sgn(R)
//
*F*/
IPPFUN(IppStatus, ippsDiv_BN, (IppsBigNumState* pA, IppsBigNumState* pB, IppsBigNumState* pQ, IppsBigNumState* pR))
{
IPP_BAD_PTR4_RET(pA, pB, pQ, pR);
pA = (IppsBigNumState*)( IPP_ALIGNED_PTR(pA, BN_ALIGNMENT) );
IPP_BADARG_RET(!BN_VALID_ID(pA), ippStsContextMatchErr);
pB = (IppsBigNumState*)( IPP_ALIGNED_PTR(pB, BN_ALIGNMENT) );
IPP_BADARG_RET(!BN_VALID_ID(pB), ippStsContextMatchErr);
pQ = (IppsBigNumState*)( IPP_ALIGNED_PTR(pQ, BN_ALIGNMENT) );
IPP_BADARG_RET(!BN_VALID_ID(pQ), ippStsContextMatchErr);
pR = (IppsBigNumState*)( IPP_ALIGNED_PTR(pR, BN_ALIGNMENT) );
IPP_BADARG_RET(!BN_VALID_ID(pR), ippStsContextMatchErr);
IPP_BADARG_RET(BN_SIZE(pB)== 1 && BN_NUMBER(pB)[0]==0, ippStsDivByZeroErr);
IPP_BADARG_RET(BN_ROOM(pR)<BN_SIZE(pB), ippStsOutOfRangeErr);
IPP_BADARG_RET((int)BN_ROOM(pQ)<(int)(BN_SIZE(pA)-BN_SIZE(pB)), ippStsOutOfRangeErr);
{
BNU_CHUNK_T* pDataA = BN_BUFFER(pA);
cpSize nsA = BN_SIZE(pA);
BNU_CHUNK_T* pDataB = BN_NUMBER(pB);
cpSize nsB = BN_SIZE(pB);
BNU_CHUNK_T* pDataQ = BN_NUMBER(pQ);
cpSize nsQ;
BNU_CHUNK_T* pDataR = BN_NUMBER(pR);
cpSize nsR;
COPY_BNU(pDataA, BN_NUMBER(pA), nsA);
nsR = cpDiv_BNU(pDataQ, &nsQ, pDataA, nsA, pDataB, nsB);
COPY_BNU(pDataR, pDataA, nsR);
BN_SIGN(pQ) = BN_SIGN(pA)==BN_SIGN(pB)? ippBigNumPOS : ippBigNumNEG;
BN_SIZE(pQ) = nsQ;
if(nsQ==1 && pDataQ[0]==0) BN_SIGN(pQ) = ippBigNumPOS;
BN_SIGN(pR) = BN_SIGN(pA);
BN_SIZE(pR) = nsR;
if(nsR==1 && pDataR[0]==0) BN_SIGN(pR) = ippBigNumPOS;
return ippStsNoErr;
}
}
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