basicmem.isa

来自「M5,一个功能强大的多处理器系统模拟器.很多针对处理器架构,性能的研究都使用它作」· ISA 代码 · 共 91 行

////////////////////////////////////////////////////////////////////
//
// Mem instructions
//

def template MemDeclare {{
        /**
         * Static instruction class for "%(mnemonic)s".
         */
        class %(class_name)s : public %(base_class)s
        {
          public:

            /// Constructor.
            %(class_name)s(ExtMachInst machInst);

            %(BasicExecDeclare)s

            %(InitiateAccDeclare)s

            %(CompleteAccDeclare)s
        };
}};

let {{
    def doMemFormat(code, execute, faultCode, name, Name, asi, opt_flags, postacc_code = ''):
        addrCalcReg = 'EA = Rs1 + Rs2;'
        addrCalcImm = 'EA = Rs1 + imm;'
        iop = InstObjParams(name, Name, 'Mem',
                {"code": code, "postacc_code" : postacc_code,
                 "fault_check": faultCode, "ea_code": addrCalcReg,
                 "EA_trunc": TruncateEA}, opt_flags)
        iop_imm = InstObjParams(name, Name + "Imm", 'MemImm',
                {"code": code, "postacc_code" : postacc_code,
                 "fault_check": faultCode, "ea_code": addrCalcImm,
                 "EA_trunc": TruncateEA}, opt_flags)
        header_output = MemDeclare.subst(iop) + MemDeclare.subst(iop_imm)
        decoder_output = BasicConstructor.subst(iop) + BasicConstructor.subst(iop_imm)
        decode_block = ROrImmDecode.subst(iop)
        exec_output = doDualSplitExecute(code, postacc_code, addrCalcReg,
                addrCalcImm, execute, faultCode, name, name + "Imm",
                Name, Name + "Imm", asi, opt_flags)
        return (header_output, decoder_output, exec_output, decode_block)
}};

def format LoadAlt(code, *opt_flags) {{
        code = filterDoubles(code)
        (header_output,
         decoder_output,
         exec_output,
         decode_block) = doMemFormat(code, LoadFuncs,
            AlternateASIPrivFaultCheck, name, Name, "EXT_ASI", opt_flags)
}};

def format StoreAlt(code, *opt_flags) {{
        code = filterDoubles(code)
        (header_output,
         decoder_output,
         exec_output,
         decode_block) = doMemFormat(code, StoreFuncs,
            AlternateASIPrivFaultCheck, name, Name, "EXT_ASI", opt_flags)
}};

def format Load(code, *opt_flags) {{
        code = filterDoubles(code)
        (header_output,
         decoder_output,
         exec_output,
         decode_block) = doMemFormat(code,
             LoadFuncs, '', name, Name, 0, opt_flags)
}};

def format Store(code, *opt_flags) {{
        code = filterDoubles(code)
        (header_output,
         decoder_output,
         exec_output,
         decode_block) = doMemFormat(code,
             StoreFuncs, '', name, Name, 0, opt_flags)
}};

def format TwinLoad(code, *opt_flags) {{
        (header_output,
         decoder_output,
         exec_output,
         decode_block) = doMemFormat(code, LoadFuncs,
            AlternateASIPrivFaultCheck + TwinAlignmentFaultCheck,
            name, Name, "EXT_ASI", opt_flags)
}};