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Diffstat (limited to 'ext/ipp/sources/ippcp/pcpbnarithdiv.c')
-rw-r--r-- | ext/ipp/sources/ippcp/pcpbnarithdiv.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/ext/ipp/sources/ippcp/pcpbnarithdiv.c b/ext/ipp/sources/ippcp/pcpbnarithdiv.c new file mode 100644 index 0000000..a76f57b --- /dev/null +++ b/ext/ipp/sources/ippcp/pcpbnarithdiv.c @@ -0,0 +1,125 @@ +/******************************************************************************* +* 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; + } +} |