Instruction decodeReadWrite(
int instruction, SPARCInstructionFactory factory, int rs1Num, int rdNum) {
Instruction instr = null;
int specialReg = specialRegNum;
if (rs1Num == 0) specialReg = SPARCSpecialRegisters.Y;
if (rs1Num == 15 && rdNum == 0) {
instr = factory.newStbarInstruction();
} else {
instr = factory.newReadInstruction(specialReg, rs1Num, SPARCRegisters.getRegister(rdNum));
}
return instr;
}
Instruction decodeMemoryInstruction(
int instruction,
SPARCRegisterIndirectAddress addr,
SPARCRegister rd,
SPARCInstructionFactory factory) {
return factory.newRettInstruction(addr);
}
Instruction decodeFloatInstruction(
int instruction,
SPARCRegister rs1,
SPARCRegister rs2,
SPARCRegister rd,
SPARCInstructionFactory factory) {
if (Assert.ASSERTS_ENABLED)
Assert.that(rs2.isFloat() && rd.isFloat(), "rs2, rd have to be float registers");
return factory.newFP2RegisterInstruction(
name, opf, (SPARCFloatRegister) rs2, (SPARCFloatRegister) rd);
}
Instruction decode(int instruction, SPARCInstructionFactory factory) {
return factory.newUnimpInstruction(instruction & DISP_22_MASK);
}