blockmem.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 317 行

////////////////////////////////////////////////////////////////////
//
// Block Memory instructions
//

output header {{

        class BlockMem : public SparcMacroInst
        {
          protected:

            // Constructor
            // We make the assumption that all block memory operations
            // Will take 8 instructions to execute
            BlockMem(const char *mnem, ExtMachInst _machInst) :
                SparcMacroInst(mnem, _machInst, No_OpClass, 8)
            {}
        };

        class BlockMemImm : public BlockMem
        {
          protected:

            // Constructor
            BlockMemImm(const char *mnem, ExtMachInst _machInst) :
                BlockMem(mnem, _machInst)
            {}
        };

        class BlockMemMicro : public SparcMicroInst
        {
          protected:

            // Constructor
            BlockMemMicro(const char *mnem, ExtMachInst _machInst,
                    OpClass __opClass, int8_t _offset) :
                SparcMicroInst(mnem, _machInst, __opClass),
                offset(_offset)
            {}

            std::string generateDisassembly(Addr pc,
                const SymbolTable *symtab) const;

            const int8_t offset;
        };

        class BlockMemImmMicro : public BlockMemMicro
        {
          protected:

            // Constructor
            BlockMemImmMicro(const char *mnem, ExtMachInst _machInst,
                    OpClass __opClass, int8_t _offset) :
                BlockMemMicro(mnem, _machInst, __opClass, _offset),
                imm(sext<13>(SIMM13))
            {}

            std::string generateDisassembly(Addr pc,
                const SymbolTable *symtab) const;

            const int32_t imm;
        };
}};

output decoder {{
        std::string BlockMemMicro::generateDisassembly(Addr pc,
                const SymbolTable *symtab) const
        {
            std::stringstream response;
            bool load = flags[IsLoad];
            bool save = flags[IsStore];

            printMnemonic(response, mnemonic);
            if(save)
            {
                printReg(response, _srcRegIdx[0]);
                ccprintf(response, ", ");
            }
            ccprintf(response, "[ ");
            printReg(response, _srcRegIdx[!save ? 0 : 1]);
            ccprintf(response, " + ");
            printReg(response, _srcRegIdx[!save ? 1 : 2]);
            ccprintf(response, " ]");
            if(load)
            {
                ccprintf(response, ", ");
                printReg(response, _destRegIdx[0]);
            }

            return response.str();
        }

        std::string BlockMemImmMicro::generateDisassembly(Addr pc,
                const SymbolTable *symtab) const
        {
            std::stringstream response;
            bool load = flags[IsLoad];
            bool save = flags[IsStore];

            printMnemonic(response, mnemonic);
            if(save)
            {
                printReg(response, _srcRegIdx[1]);
                ccprintf(response, ", ");
            }
            ccprintf(response, "[ ");
            printReg(response, _srcRegIdx[0]);
            if(imm >= 0)
                ccprintf(response, " + 0x%x ]", imm);
            else
                ccprintf(response, " + -0x%x ]", -imm);
            if(load)
            {
                ccprintf(response, ", ");
                printReg(response, _destRegIdx[0]);
            }

            return response.str();
        }

}};

def template BlockMemDeclare {{
        /**
         * Static instruction class for a block memory operation
         */
        class %(class_name)s : public %(base_class)s
        {
          public:
            //Constructor
            %(class_name)s(ExtMachInst machInst);

          protected:
            class %(class_name)s_0 : public %(base_class)sMicro
            {
              public:
                //Constructor
                %(class_name)s_0(ExtMachInst machInst);
                %(BasicExecDeclare)s
                %(InitiateAccDeclare)s
                %(CompleteAccDeclare)s
            };

            class %(class_name)s_1 : public %(base_class)sMicro
            {
              public:
                //Constructor
                %(class_name)s_1(ExtMachInst machInst);
                %(BasicExecDeclare)s
                %(InitiateAccDeclare)s
                %(CompleteAccDeclare)s
            };

            class %(class_name)s_2 : public %(base_class)sMicro
            {
              public:
                //Constructor
                %(class_name)s_2(ExtMachInst machInst);
                %(BasicExecDeclare)s
                %(InitiateAccDeclare)s
                %(CompleteAccDeclare)s
            };

            class %(class_name)s_3 : public %(base_class)sMicro
            {
              public:
                //Constructor
                %(class_name)s_3(ExtMachInst machInst);
                %(BasicExecDeclare)s
                %(InitiateAccDeclare)s
                %(CompleteAccDeclare)s
            };

            class %(class_name)s_4 : public %(base_class)sMicro
            {
              public:
                //Constructor
                %(class_name)s_4(ExtMachInst machInst);
                %(BasicExecDeclare)s
                %(InitiateAccDeclare)s
                %(CompleteAccDeclare)s
            };

            class %(class_name)s_5 : public %(base_class)sMicro
            {
              public:
                //Constructor
                %(class_name)s_5(ExtMachInst machInst);
                %(BasicExecDeclare)s
                %(InitiateAccDeclare)s
                %(CompleteAccDeclare)s
            };

            class %(class_name)s_6 : public %(base_class)sMicro
            {
              public:
                //Constructor
                %(class_name)s_6(ExtMachInst machInst);
                %(BasicExecDeclare)s
                %(InitiateAccDeclare)s
                %(CompleteAccDeclare)s
            };

            class %(class_name)s_7 : public %(base_class)sMicro
            {
              public:
                //Constructor
                %(class_name)s_7(ExtMachInst machInst);
                %(BasicExecDeclare)s
                %(InitiateAccDeclare)s
                %(CompleteAccDeclare)s
            };
        };
}};

// Basic instruction class constructor template.
def template BlockMemConstructor {{
        inline %(class_name)s::%(class_name)s(ExtMachInst machInst)
            : %(base_class)s("%(mnemonic)s", machInst)
        {
            %(constructor)s;
            microops[0] = new %(class_name)s_0(machInst);
            microops[1] = new %(class_name)s_1(machInst);
            microops[2] = new %(class_name)s_2(machInst);
            microops[3] = new %(class_name)s_3(machInst);
            microops[4] = new %(class_name)s_4(machInst);
            microops[5] = new %(class_name)s_5(machInst);
            microops[6] = new %(class_name)s_6(machInst);
            microops[7] = new %(class_name)s_7(machInst);
        }
}};

def template BlockMemMicroConstructor {{
        inline %(class_name)s::
            %(class_name)s_%(micro_pc)s::
            %(class_name)s_%(micro_pc)s(ExtMachInst machInst) :
                %(base_class)sMicro("%(mnemonic)s[%(micro_pc)s]",
                        machInst, %(op_class)s, %(micro_pc)s * 8)
    {
        %(constructor)s;
        %(set_flags)s;
    }
}};

let {{

    def doBlockMemFormat(code, faultCode, execute, name, Name, opt_flags):
        # XXX Need to take care of pstate.hpriv as well. The lower ASIs
        # are split into ones that are available in priv and hpriv, and
        # those that are only available in hpriv
        addrCalcReg = 'EA = Rs1 + Rs2 + offset;'
        addrCalcImm = 'EA = Rs1 + imm + offset;'
        iop = InstObjParams(name, Name, 'BlockMem', code, opt_flags)
        iop_imm = InstObjParams(name, Name + 'Imm', 'BlockMemImm', code, opt_flags)
        header_output = BlockMemDeclare.subst(iop) + BlockMemDeclare.subst(iop_imm)
        decoder_output = BlockMemConstructor.subst(iop) + BlockMemConstructor.subst(iop_imm)
        decode_block = ROrImmDecode.subst(iop)
        matcher = re.compile(r'Frd_N')
        exec_output = ''
        for microPc in range(8):
            flag_code = ''
            if (microPc == 7):
                flag_code = "flags[IsLastMicroop] = true;"
            elif (microPc == 0):
                flag_code = "flags[IsDelayedCommit] = true; flags[IsFirstMicroop] = true;"
            else:
                flag_code = "flags[IsDelayedCommit] = true;"
            pcedCode = matcher.sub("Frd_%d" % microPc, code)
            iop = InstObjParams(name, Name, 'BlockMem',
                    {"code": pcedCode, "ea_code": addrCalcReg,
                    "fault_check": faultCode, "micro_pc": microPc,
                    "set_flags": flag_code, "EA_trunc" : TruncateEA},
                    opt_flags)
            iop_imm = InstObjParams(name, Name + 'Imm', 'BlockMemImm',
                    {"code": pcedCode, "ea_code": addrCalcImm,
                    "fault_check": faultCode, "micro_pc": microPc,
                    "set_flags": flag_code, "EA_trunc" : TruncateEA},
                    opt_flags)
            decoder_output += BlockMemMicroConstructor.subst(iop)
            decoder_output += BlockMemMicroConstructor.subst(iop_imm)
            exec_output += doDualSplitExecute(
                    pcedCode, '', addrCalcReg, addrCalcImm, execute, faultCode,
                    makeMicroName(name, microPc),
                    makeMicroName(name + "Imm", microPc),
                    makeMicroName(Name, microPc),
                    makeMicroName(Name + "Imm", microPc),
                    "EXT_ASI", opt_flags);
            faultCode = ''
        return (header_output, decoder_output, exec_output, decode_block)
}};

def format BlockLoad(code, *opt_flags) {{
        code = filterDoubles(code)
        # We need to make sure to check the highest priority fault last.
        # That way, if other faults have been detected, they'll be overwritten
        # rather than the other way around.
        faultCode = AlternateASIPrivFaultCheck + BlockAlignmentFaultCheck
        (header_output,
         decoder_output,
         exec_output,
         decode_block) = doBlockMemFormat(code, faultCode,
             LoadFuncs, name, Name, opt_flags)
}};

def format BlockStore(code, *opt_flags) {{
        code = filterDoubles(code)
        # We need to make sure to check the highest priority fault last.
        # That way, if other faults have been detected, they'll be overwritten
        # rather than the other way around.
        faultCode = AlternateASIPrivFaultCheck + BlockAlignmentFaultCheck
        (header_output,
         decoder_output,
         exec_output,
         decode_block) = doBlockMemFormat(code, faultCode,
             StoreFuncs, name, Name, opt_flags)
}};