xref: /gem5/src/arch/mips/isa/formats/fp.isa

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

////////////////////////////////////////////////////////////////////
//
// Floating Point operate instructions
//

output header {{
        /**
         * Base class for FP operations.
         */
        class FPOp : public MipsStaticInst
        {
                protected:

                /// Constructor
                FPOp(const char *mnem, MachInst _machInst, OpClass __opClass) : MipsStaticInst(mnem, _machInst, __opClass)
                {
                }

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

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


// Primary format for float operate instructions:
def format FloatOp(code, *flags) {{
        iop = InstObjParams(name, Name, 'MipsStaticInst', CodeBlock(code), flags)
        header_output = BasicDeclare.subst(iop)
        decoder_output = BasicConstructor.subst(iop)
        decode_block = BasicDecode.subst(iop)
        exec_output = BasicExecute.subst(iop)
}};

def format FloatCompareOp(code, *flags) {{
        code = 'bool cond;\n' + code
        code += 'FCSR = makeCCVector(FCSR, CC,cond);\n'
        iop = InstObjParams(name, Name, 'MipsStaticInst', CodeBlock(code), flags)
        header_output = BasicDeclare.subst(iop)
        decoder_output = BasicConstructor.subst(iop)
        decode_block = BasicDecode.subst(iop)
        exec_output = BasicExecute.subst(iop)
}};

def format FloatCompareWithXcptOp(code, *flags) {{
        code = 'bool cond;\n' + code
        code += 'FCSR = makeCCVector(FCSR, CC,cond);\n'
        iop = InstObjParams(name, Name, 'MipsStaticInst', CodeBlock(code), flags)
        header_output = BasicDeclare.subst(iop)
        decoder_output = BasicConstructor.subst(iop)
        decode_block = BasicDecode.subst(iop)
        exec_output = BasicExecute.subst(iop)
}};

def format FloatConvertOp(code, *flags) {{
        iop = InstObjParams(name, Name, 'MipsStaticInst', CodeBlock(code), flags)
        header_output = BasicDeclare.subst(iop)
        decoder_output = BasicConstructor.subst(iop)
        decode_block = BasicDecode.subst(iop)
        exec_output = BasicExecute.subst(iop)
}};

// Primary format for float64 operate instructions:
def format Float64Op(code, *flags) {{
        iop = InstObjParams(name, Name, 'MipsStaticInst', CodeBlock(code), flags)
        header_output = BasicDeclare.subst(iop)
        decoder_output = BasicConstructor.subst(iop)
        decode_block = BasicDecode.subst(iop)
        exec_output = BasicExecute.subst(iop)
}};

def format Float64ConvertOp(code, *flags) {{
        code = 'bool cond;\n' + code
        code += 'FCSR = makeCCVector(FCSR, CC,cond);\n'
        iop = InstObjParams(name, Name, 'MipsStaticInst', CodeBlock(code), flags)
        header_output = BasicDeclare.subst(iop)
        decoder_output = BasicConstructor.subst(iop)
        decode_block = BasicDecode.subst(iop)
        exec_output = BasicExecute.subst(iop)
}};

def format FloatPSCompareOp(code, *flags) {{
        code = 'bool cond1;\nbool cond2;\n' + code
        code += 'FCSR = makeCCVector(FCSR, CC+1, cond1);\n'
        code += 'FCSR = makeCCVector(FCSR, CC, cond2);\n'
        iop = InstObjParams(name, Name, 'MipsStaticInst', CodeBlock(code), flags)
        header_output = BasicDeclare.subst(iop)
        decoder_output = BasicConstructor.subst(iop)
        decode_block = BasicDecode.subst(iop)
        exec_output = BasicExecute.subst(iop)
}};

def format FloatPSCompareWithXcptOp(code, *flags) {{
        code = 'bool cond1;\nbool cond2;\n' + code
        code += 'FCSR = makeCCVector(FCSR, CC+1, cond1);\n'
        code += 'FCSR = makeCCVector(FCSR, CC, cond2);\n'
        iop = InstObjParams(name, Name, 'MipsStaticInst', CodeBlock(code), flags)
        header_output = BasicDeclare.subst(iop)
        decoder_output = BasicConstructor.subst(iop)
        decode_block = BasicDecode.subst(iop)
        exec_output = BasicExecute.subst(iop)
}};