// -*- mode:c++ -*-
//
// Copyright (c) 2018 ARM Limited
// All rights reserved
//
// The license below extends only to copyright in the software and shall
// not be construed as granting a license to any other intellectual
// property including but not limited to intellectual property relating
// to a hardware implementation of the functionality of the software
// licensed hereunder.  You may use the software subject to the license
// terms below provided that you ensure that this notice is replicated
// unmodified and in its entirety in all distributions of the software,
// modified or unmodified, in source code or in binary form.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met: redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer;
// redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution;
// neither the name of the copyright holders nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Authors: Matt Horsnell
//          Prakash Ramrakhyani

let {{

    cryptoEnabledCheckCode = '''
        auto crypto_reg = xc->tcBase()->readMiscReg(MISCREG_ID_ISAR5);
        if (!(crypto_reg & %(mask)d)) {
            return std::make_shared<UndefinedInstruction>(machInst, true);
        }
    '''

    header_output = ""
    decoder_output = ""
    exec_output = ""

    cryptoRegRegRegPrefix = '''
        Crypto crypto;
        RegVect srcReg1, srcReg2, destReg;
        // Read source and destination registers.
    '''
    for reg in range(4):
        cryptoRegRegRegPrefix += '''
            srcReg1.regs[%(reg)d] = htog(FpOp1P%(reg)d_uw);
            srcReg2.regs[%(reg)d] = htog(FpOp2P%(reg)d_uw);
            destReg.regs[%(reg)d] = htog(FpDestP%(reg)d_uw);
        ''' % { "reg" : reg }
    cryptoRegRegRegPrefix += '''
        unsigned char *output = (unsigned char *)(&destReg.regs[0]);
        unsigned char *input  = (unsigned char *)(&srcReg1.regs[0]);
        unsigned char *input2 = (unsigned char *)(&srcReg2.regs[0]);
    '''

    cryptoSuffix = ""
    for reg in range(4):
        cryptoSuffix += '''
            FpDestP%(reg)d_uw = gtoh(destReg.regs[%(reg)d]);
        ''' % { "reg" : reg }

    cryptoRegRegPrefix = '''
        Crypto crypto;
        RegVect srcReg1, destReg;
        // Read source and destination registers.
    '''
    for reg in range(4):
        cryptoRegRegPrefix += '''
            srcReg1.regs[%(reg)d] = htog(FpOp1P%(reg)d_uw);
            destReg.regs[%(reg)d] = htog(FpDestP%(reg)d_uw);
        ''' % { "reg" : reg }

    cryptoRegRegPrefix += '''
        // cast into format passed to aes encrypt method.
        unsigned char *output = (unsigned char *)(&destReg.regs[0]);
        unsigned char *input  = (unsigned char *)(&srcReg1.regs[0]);
    '''

    def cryptoRegRegRegInst(name, Name, opClass, enable_check, crypto_func):
        global header_output, decoder_output, exec_output

        crypto_prefix = enable_check + cryptoRegRegRegPrefix
        cryptocode = crypto_prefix + crypto_func + cryptoSuffix

        cryptoiop = InstObjParams(name, Name, "RegRegRegOp",
                                { "code": cryptocode,
                                  "r_count": 4,
                                  "predicate_test": predicateTest,
                                  "op_class": opClass}, [])
        header_output += RegRegRegOpDeclare.subst(cryptoiop)
        decoder_output += RegRegRegOpConstructor.subst(cryptoiop)
        exec_output += CryptoPredOpExecute.subst(cryptoiop)

    def cryptoRegRegInst(name, Name, opClass, enable_check, crypto_func):
        global header_output, decoder_output, exec_output

        crypto_prefix = enable_check + cryptoRegRegPrefix
        cryptocode = crypto_prefix + crypto_func + cryptoSuffix

        cryptoiop = InstObjParams(name, Name, "RegRegOp",
                                { "code": cryptocode,
                                  "r_count": 4,
                                  "predicate_test": predicateTest,
                                  "op_class": opClass}, [])
        header_output += RegRegOpDeclare.subst(cryptoiop)
        decoder_output += RegRegOpConstructor.subst(cryptoiop)
        exec_output += CryptoPredOpExecute.subst(cryptoiop)

    def cryptoRegRegImmInst(name, Name, opClass, enable_check, crypto_func):
        global header_output, decoder_output, exec_output

        crypto_prefix = enable_check + cryptoRegRegPrefix
        cryptocode = crypto_prefix + crypto_func + cryptoSuffix

        cryptoiop = InstObjParams(name, Name, "RegRegImmOp",
                                { "code": cryptocode,
                                  "r_count": 4,
                                  "predicate_test": predicateTest,
                                  "op_class": opClass}, [])
        header_output += RegRegImmOpDeclare.subst(cryptoiop)
        decoder_output += RegRegImmOpConstructor.subst(cryptoiop)
        exec_output += CryptoPredOpExecute.subst(cryptoiop)

    aeseCode = "crypto.aesEncrypt(output, input, input2);"
    aesdCode = "crypto.aesDecrypt(output, input, input2);"
    aesmcCode = "crypto.aesMixColumns(output, input);"
    aesimcCode = "crypto.aesInvMixColumns(output, input);"

    sha1_cCode = "crypto.sha1C(output, input, input2);"
    sha1_pCode = "crypto.sha1P(output, input, input2);"
    sha1_mCode = "crypto.sha1M(output, input, input2);"
    sha1_hCode = "crypto.sha1H(output, input);"
    sha1_su0Code = "crypto.sha1Su0(output, input, input2);"
    sha1_su1Code = "crypto.sha1Su1(output, input);"

    sha256_hCode = "crypto.sha256H(output, input, input2);"
    sha256_h2Code = "crypto.sha256H2(output, input, input2);"
    sha256_su0Code = "crypto.sha256Su0(output, input);"
    sha256_su1Code = "crypto.sha256Su1(output, input, input2);"

    aes_enabled = cryptoEnabledCheckCode % { "mask" : 0xF0 }
    cryptoRegRegRegInst("aese", "AESE", "SimdAesOp",
                        aes_enabled, aeseCode)
    cryptoRegRegRegInst("aesd", "AESD", "SimdAesOp",
                        aes_enabled, aesdCode)
    cryptoRegRegInst("aesmc", "AESMC", "SimdAesMixOp",
                     aes_enabled, aesmcCode)
    cryptoRegRegInst("aesimc", "AESIMC", "SimdAesMixOp",
                     aes_enabled, aesimcCode)

    sha1_enabled = cryptoEnabledCheckCode % { "mask" : 0xF00 }
    cryptoRegRegRegInst("sha1c", "SHA1C", "SimdSha1HashOp",
                        sha1_enabled, sha1_cCode)
    cryptoRegRegRegInst("sha1p", "SHA1P", "SimdSha1HashOp",
                        sha1_enabled, sha1_pCode)
    cryptoRegRegRegInst("sha1m", "SHA1M", "SimdSha1HashOp",
                        sha1_enabled, sha1_mCode)
    cryptoRegRegInst("sha1h", "SHA1H", "SimdSha1Hash2Op",
                     sha1_enabled, sha1_hCode)
    cryptoRegRegRegInst("sha1su0", "SHA1SU0", "SimdShaSigma3Op",
                        sha1_enabled, sha1_su0Code)
    cryptoRegRegInst("sha1su1", "SHA1SU1", "SimdShaSigma2Op",
                     sha1_enabled, sha1_su1Code)

    sha2_enabled = cryptoEnabledCheckCode % { "mask" : 0xF000 }
    cryptoRegRegRegInst("sha256h", "SHA256H", "SimdSha256HashOp",
                        sha2_enabled, sha256_hCode)
    cryptoRegRegRegInst("sha256h2", "SHA256H2", "SimdSha256Hash2Op",
                        sha2_enabled, sha256_h2Code)
    cryptoRegRegInst("sha256su0", "SHA256SU0", "SimdShaSigma2Op",
                     sha2_enabled, sha256_su0Code)
    cryptoRegRegRegInst("sha256su1", "SHA256SU1", "SimdShaSigma3Op",
                        sha2_enabled, sha256_su1Code)
}};