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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;
+ }
+}