xref: /gem5/src/arch/arm/isa/insts/misc.isa

// -*- mode:c++ -*-

// Copyright (c) 2010 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: Gabe Black

let {{

    svcCode = '''
#if FULL_SYSTEM
    fault = new SupervisorCall;
#else
    fault = new SupervisorCall(machInst);
#endif
    '''

    svcIop = InstObjParams("svc", "Svc", "PredOp",
                           { "code": svcCode,
                             "predicate_test": predicateTest }, ["IsSyscall"])
    header_output = BasicDeclare.subst(svcIop)
    decoder_output = BasicConstructor.subst(svcIop)
    exec_output = PredOpExecute.subst(svcIop)

}};

let {{

    header_output = decoder_output = exec_output = ""

    mrsCpsrCode = "Dest = (Cpsr | CondCodes) & 0xF8FF03DF"
    mrsCpsrIop = InstObjParams("mrs", "MrsCpsr", "MrsOp",
                               { "code": mrsCpsrCode,
                                 "predicate_test": predicateTest }, [])
    header_output += MrsDeclare.subst(mrsCpsrIop)
    decoder_output += MrsConstructor.subst(mrsCpsrIop)
    exec_output += PredOpExecute.subst(mrsCpsrIop)

    mrsSpsrCode = "Dest = Spsr"
    mrsSpsrIop = InstObjParams("mrs", "MrsSpsr", "MrsOp",
                               { "code": mrsSpsrCode,
                                 "predicate_test": predicateTest }, [])
    header_output += MrsDeclare.subst(mrsSpsrIop)
    decoder_output += MrsConstructor.subst(mrsSpsrIop)
    exec_output += PredOpExecute.subst(mrsSpsrIop)

    msrCpsrRegCode = '''
        uint32_t newCpsr =
            cpsrWriteByInstr(Cpsr | CondCodes, Op1, byteMask, false);
        Cpsr = ~CondCodesMask & newCpsr;
        CondCodes = CondCodesMask & newCpsr;
    '''
    msrCpsrRegIop = InstObjParams("msr", "MsrCpsrReg", "MsrRegOp",
                                  { "code": msrCpsrRegCode,
                                    "predicate_test": predicateTest }, [])
    header_output += MsrRegDeclare.subst(msrCpsrRegIop)
    decoder_output += MsrRegConstructor.subst(msrCpsrRegIop)
    exec_output += PredOpExecute.subst(msrCpsrRegIop)

    msrSpsrRegCode = "Spsr = spsrWriteByInstr(Spsr, Op1, byteMask, false);"
    msrSpsrRegIop = InstObjParams("msr", "MsrSpsrReg", "MsrRegOp",
                                  { "code": msrSpsrRegCode,
                                    "predicate_test": predicateTest }, [])
    header_output += MsrRegDeclare.subst(msrSpsrRegIop)
    decoder_output += MsrRegConstructor.subst(msrSpsrRegIop)
    exec_output += PredOpExecute.subst(msrSpsrRegIop)

    msrCpsrImmCode = '''
        uint32_t newCpsr =
            cpsrWriteByInstr(Cpsr | CondCodes, imm, byteMask, false);
        Cpsr = ~CondCodesMask & newCpsr;
        CondCodes = CondCodesMask & newCpsr;
    '''
    msrCpsrImmIop = InstObjParams("msr", "MsrCpsrImm", "MsrImmOp",
                                  { "code": msrCpsrImmCode,
                                    "predicate_test": predicateTest }, [])
    header_output += MsrImmDeclare.subst(msrCpsrImmIop)
    decoder_output += MsrImmConstructor.subst(msrCpsrImmIop)
    exec_output += PredOpExecute.subst(msrCpsrImmIop)

    msrSpsrImmCode = "Spsr = spsrWriteByInstr(Spsr, imm, byteMask, false);"
    msrSpsrImmIop = InstObjParams("msr", "MsrSpsrImm", "MsrImmOp",
                                  { "code": msrSpsrImmCode,
                                    "predicate_test": predicateTest }, [])
    header_output += MsrImmDeclare.subst(msrSpsrImmIop)
    decoder_output += MsrImmConstructor.subst(msrSpsrImmIop)
    exec_output += PredOpExecute.subst(msrSpsrImmIop)

    revCode = '''
    uint32_t val = Op1;
    Dest = swap_byte(val);
    '''
    revIop = InstObjParams("rev", "Rev", "RevOp",
                           { "code": revCode,
                             "predicate_test": predicateTest }, [])
    header_output += RevOpDeclare.subst(revIop)
    decoder_output += RevOpConstructor.subst(revIop)
    exec_output += PredOpExecute.subst(revIop)

    rev16Code = '''
    uint32_t val = Op1;
    Dest = (bits(val, 15, 8) << 0) |
           (bits(val, 7, 0) << 8) |
           (bits(val, 31, 24) << 16) |
           (bits(val, 23, 16) << 24);
    '''
    rev16Iop = InstObjParams("rev16", "Rev16", "RevOp",
                             { "code": rev16Code,
                               "predicate_test": predicateTest }, [])
    header_output += RevOpDeclare.subst(rev16Iop)
    decoder_output += RevOpConstructor.subst(rev16Iop)
    exec_output += PredOpExecute.subst(rev16Iop)

    revshCode = '''
    uint16_t val = Op1;
    Dest = sext<16>(swap_byte(val));
    '''
    revshIop = InstObjParams("revsh", "Revsh", "RevOp",
                             { "code": revshCode,
                               "predicate_test": predicateTest }, [])
    header_output += RevOpDeclare.subst(revshIop)
    decoder_output += RevOpConstructor.subst(revshIop)
    exec_output += PredOpExecute.subst(revshIop)

    ssatCode = '''
        int32_t operand = shift_rm_imm(Op1, shiftAmt, shiftType, 0);
        int32_t res;
        if (satInt(res, operand, satImm))
            CondCodes = CondCodes | (1 << 27);
        else
            CondCodes = CondCodes;
        Dest = res;
    '''
    ssatIop = InstObjParams("ssat", "Ssat", "SatShiftOp",
                            { "code": ssatCode,
                              "predicate_test": predicateTest }, [])
    header_output += SatShiftOpDeclare.subst(ssatIop)
    decoder_output += SatShiftOpConstructor.subst(ssatIop)
    exec_output += PredOpExecute.subst(ssatIop)

    usatCode = '''
        int32_t operand = shift_rm_imm(Op1, shiftAmt, shiftType, 0);
        int32_t res;
        if (uSatInt(res, operand, satImm))
            CondCodes = CondCodes | (1 << 27);
        else
            CondCodes = CondCodes;
        Dest = res;
    '''
    usatIop = InstObjParams("usat", "Usat", "SatShiftOp",
                            { "code": usatCode,
                              "predicate_test": predicateTest }, [])
    header_output += SatShiftOpDeclare.subst(usatIop)
    decoder_output += SatShiftOpConstructor.subst(usatIop)
    exec_output += PredOpExecute.subst(usatIop)

    ssat16Code = '''
        int32_t res;
        uint32_t resTemp = 0;
        CondCodes = CondCodes;
        int32_t argLow = sext<16>(bits(Op1, 15, 0));
        int32_t argHigh = sext<16>(bits(Op1, 31, 16));
        if (satInt(res, argLow, satImm))
            CondCodes = CondCodes | (1 << 27);
        replaceBits(resTemp, 15, 0, res);
        if (satInt(res, argHigh, satImm))
            CondCodes = CondCodes | (1 << 27);
        replaceBits(resTemp, 31, 16, res);
        Dest = resTemp;
    '''
    ssat16Iop = InstObjParams("ssat16", "Ssat16", "SatOp",
                              { "code": ssat16Code,
                                "predicate_test": predicateTest }, [])
    header_output += SatOpDeclare.subst(ssat16Iop)
    decoder_output += SatOpConstructor.subst(ssat16Iop)
    exec_output += PredOpExecute.subst(ssat16Iop)

    usat16Code = '''
        int32_t res;
        uint32_t resTemp = 0;
        CondCodes = CondCodes;
        int32_t argLow = sext<16>(bits(Op1, 15, 0));
        int32_t argHigh = sext<16>(bits(Op1, 31, 16));
        if (uSatInt(res, argLow, satImm))
            CondCodes = CondCodes | (1 << 27);
        replaceBits(resTemp, 15, 0, res);
        if (uSatInt(res, argHigh, satImm))
            CondCodes = CondCodes | (1 << 27);
        replaceBits(resTemp, 31, 16, res);
        Dest = resTemp;
    '''
    usat16Iop = InstObjParams("usat16", "Usat16", "SatOp",
                              { "code": usat16Code,
                                "predicate_test": predicateTest }, [])
    header_output += SatOpDeclare.subst(usat16Iop)
    decoder_output += SatOpConstructor.subst(usat16Iop)
    exec_output += PredOpExecute.subst(usat16Iop)
}};