1 files changed, 101 insertions, 0 deletions
diff --git a/ext/ipp/sources/ippcp/pcpgfpbufsize.c b/ext/ipp/sources/ippcp/pcpgfpbufsize.c
new file mode 100644
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+++ b/ext/ipp/sources/ippcp/pcpgfpbufsize.c
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+/*******************************************************************************
+* Copyright 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. Cryptography Primitives.
+//     Operations over GF(p).
+//
+//     Context:
+//        ippsGFpScratchBufferSize
+//
+*/
+#include "owndefs.h"
+#include "owncp.h"
+
+#include "pcpgfpstuff.h"
+#include "pcpgfpxstuff.h"
+#include "pcptool.h"
+
+
+/*F*
+// Name: ippsGFpScratchBufferSize
+//
+// Purpose: Gets the size of the scratch buffer.
+//
+// Returns:                   Reason:
+//    ippStsNullPtrErr          pGFp == NULL
+//                              pBufferSize == NULL
+//    ippStsContextMatchErr     incorrect pGFp's context id
+//    ippStsBadArgErr           0>=nExponents
+//                              nExponents>6
+//    ippStsNoErr               no error
+//
+// Parameters:
+//    nExponents      Number of exponents.
+//    ExpBitSize      Maximum bit size of the exponents.
+//    pGFp            Pointer to the context of the finite field.
+//    pBufferSize     Pointer to the calculated buffer size in bytes.
+//
+*F*/
+
+IPPFUN(IppStatus, ippsGFpScratchBufferSize,(int nExponents, int ExpBitSize, const IppsGFpState* pGFp, int* pBufferSize))
+{
+   IPP_BAD_PTR2_RET(pGFp, pBufferSize);
+   pGFp = (IppsGFpState*)( IPP_ALIGNED_PTR(pGFp, GFP_ALIGNMENT) );
+   IPP_BADARG_RET( !GFP_TEST_ID(pGFp), ippStsContextMatchErr );
+
+   IPP_BADARG_RET( 0>=nExponents ||nExponents>IPP_MAX_EXPONENT_NUM, ippStsBadArgErr);
+   IPP_BADARG_RET( 0>=ExpBitSize, ippStsBadArgErr);
+
+   {
+      int elmDataSize = GFP_FELEN(GFP_PMA(pGFp))*sizeof(BNU_CHUNK_T);
+
+      /* get window_size */
+      int w = (nExponents==1)? cpGFpGetOptimalWinSize(ExpBitSize) : /* use optimal window size, if single-scalar operation */
+                               nExponents;                          /* or pseudo-oprimal if multi-scalar operation */
+
+      /* number of table entries */
+      int nPrecomputed = 1<<w;
+
+      *pBufferSize = elmDataSize*nPrecomputed + (CACHE_LINE_SIZE-1);
+
+      return ippStsNoErr;
+   }
+}