/*************************************************************************
* 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 "sm2/ifma_ecpoint_sm2.h"
#include "sm2/ifma_arith_psm2.h"
#include "sm2/ifma_arith_method_sm2.h"

IPP_OWN_DEFN(IppsGFpECPoint*, gfec_PubKey_sm2_avx512,
             (IppsGFpECPoint * pR,
              const BNU_CHUNK_T* pScalar,
              int scalarLen, IppsGFpECState* pEC,
              Ipp8u* pScratchBuffer)) {
    FIX_BNU(pScalar, scalarLen);
    {
        IPP_UNREFERENCED_PARAMETER(pScratchBuffer);

        gsModEngine* pME = GFP_PMA(ECP_GFP(pEC));
        gsModEngine* nME = ECP_MONT_R(pEC);

        const int orderBits = ECP_ORDBITSIZE(pEC);
        const int orderLen  = BITS_BNU_CHUNK(orderBits);

        ifmaArithMethod* pmeth = (ifmaArithMethod*)GFP_METHOD_ALT(pME);

        BNU_CHUNK_T* pPool           = cpGFpGetPool(5, nME);
        BNU_CHUNK_T* pExtendedScalar = pPool;
        BNU_CHUNK_T* pPointPool      = pExtendedScalar + 2 * GFP_FELEN(pME);

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

        __ALIGN64 PSM2_POINT_IFMA R;
        R.x = R.y = R.z = setzero_i64();

        if (ECP_PREMULBP(pEC)) {
            gesm2_mul_base(&R, (Ipp8u*)pExtendedScalar);
        } else {
            /* Convert base point to a new Montgomery domain */
            __ALIGN64 PSM2_POINT_IFMA G52;
            recode_point_to_mont52(&G52, ECP_G(pEC), pPointPool /* 3 elem */, pmeth, pME);

            gesm2_mul(&R, &G52, (Ipp8u*)pExtendedScalar, orderBits);
        }

        recode_point_to_mont64(pR, &R, pPointPool /* 3 elem */, pmeth, pME);

        cpGFpReleasePool(5, nME);

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

#endif // (_IPP32E >= _IPP32E_K1)
