xref: /gem5/src/arch/sparc/isa/formats/branch.isa

////////////////////////////////////////////////////////////////////
//
// Branch instructions
//

output header {{
        /**
         * Base class for integer operations.
         */
        class Branch : public SparcStaticInst
        {
          protected:
            // Constructor
            Branch(const char *mnem, MachInst _machInst, OpClass __opClass) :
                SparcStaticInst(mnem, _machInst, __opClass)
            {
            }

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

output decoder {{
        std::string Branch::generateDisassembly(Addr pc, const SymbolTable *symtab) const
        {
                return "Branch instruction\n";
        }
}};

def template BranchExecute {{
        Fault %(class_name)s::execute(%(CPU_exec_context)s *xc,
                Trace::InstRecord *traceData) const
        {
            //Attempt to execute the instruction
            Fault fault = NoFault;

            %(op_decl)s;
            %(op_rd)s;
            %(code)s;

            if(fault == NoFault)
            {
                //Write the resulting state to the execution context
                %(op_wb)s;
            }

            return fault;
        }
}};

// Primary format for integer operate instructions:
def format Branch(code, *opt_flags) {{
        orig_code = code
        cblk = CodeBlock(code)
        iop = InstObjParams(name, Name, 'SparcStaticInst', cblk, opt_flags)
        header_output = BasicDeclare.subst(iop)
        decoder_output = BasicConstructor.subst(iop)
        decode_block = BasicDecode.subst(iop)
        exec_output = BranchExecute.subst(iop)
}};