/*************************************************************************
* Copyright (C) 2021 Intel Corporation
*
* Licensed under the Apache License,  Version 2.0 (the "License");
* 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.
*************************************************************************/

#include "owndefs.h"

#if (_IPP32E >= _IPP32E_K1)

#include "pcpgfpstuff.h"
#include "pcpgfpecstuff.h"

#include "ifma_arith_method_p521.h"
#include "ifma_ecpoint_p521.h"

IPP_OWN_DEFN (IppsGFpECPoint*, gfec_MulPoint_nistp521_avx512, (IppsGFpECPoint* pR,
                                                               const IppsGFpECPoint* pP,
                                                               const BNU_CHUNK_T* pScalar,
                                                               int scalarLen,
                                                               IppsGFpECState* pEC,
                                                               Ipp8u* pScratchBuffer))
{
   IPP_UNREFERENCED_PARAMETER(pScratchBuffer);

   gsModEngine *pME       = GFP_PMA(ECP_GFP(pEC));
   ifmaArithMethod_p521 *pmeth = (ifmaArithMethod_p521 *)GFP_METHOD_ALT(pME);

   const int orderBits = ECP_ORDBITSIZE(pEC);
   const int orderLen  = BITS_BNU_CHUNK(orderBits);
   const int elemLen   = GFP_PELEN(pME);

   BNU_CHUNK_T *pPool           = cpGFpGetPool(5, pME);
   BNU_CHUNK_T *pExtendedScalar = pPool;               /* 2 pool elem to hold scalar */
   BNU_CHUNK_T *pPointPool      = pPool + 2 * elemLen; /* 3 pool elem to to hold 3 point coordinates */

   /* Copy scalar */
   cpGFpElementCopyPad(pExtendedScalar, orderLen + 1, pScalar, scalarLen);

   __ALIGN64 P521_POINT_IFMA P, R;

   recode_point_to_mont52(&P, ECP_POINT_DATA(pP), pPointPool, pmeth, pME);

   ifma_ec_nistp521_mul_point(&R, &P, (Ipp8u*)pExtendedScalar, orderBits);

   recode_point_to_mont64(pR, &R, pPointPool, pmeth, pME);

   cpGFpReleasePool(5, pME);

   ECP_POINT_FLAGS(pR) = gfec_IsPointAtInfinity(pR) ? 0 : ECP_FINITE_POINT;
   return pR;
}

#endif // (_IPP32E >= _IPP32E_K1)
