//Phase 3, calls FinishBuild();
protected virtual void BuildOperand2()
{
opcode &= ~imm_mask;
wildcard_mask &= ~imm_mask;
//Clear bits 7-4
opcode &= 0xffffff0f;
System.Diagnostics.Debug.Assert((wildcard_mask & 0x00000090) == 0);
//Register version
//There are exactly two forms of the register version:
//Immediate shift (bits 7-4 = xxx0) and Register shift (bits 7-4 = 0xx1)
//Immediate shift
wildcard_mask |= 0x000000e0;
EvaluateOperand2 = owner.DataOpEvaluateOperand2_Register;
FinishBuild();
opcode &= 0xffffff0f;
wildcard_mask &= 0xffffff0f;
//Register shift
wildcard_mask |= 0x00000060;
opcode |= 0x00000010;
EvaluateOperand2 = owner.DataOpEvaluateOperand2_Register;
FinishBuild();
opcode &= 0xffffff0f;
wildcard_mask &= 0xffffff0f;
//Immediate version
opcode |= imm_mask;
wildcard_mask |= 0x000000f0;
EvaluateOperand2 = owner.DataOpEvaluateOperand2_Immediate;
FinishBuild();
wildcard_mask &= 0xffffff0f;
opcode &= ~imm_mask;
}
static internal InstructionFunc GenerateLogicalDataOpUnary(
DataOpEvaluateOperand2Func EvaluateOperand2, DataOpLogicalUnary UnaryOp, DataOpSaveResultFunc SaveResult, DataOpHandleSetFlagsFunc SetFlags)
{
return(delegate(uint opcode)
{
uint Rd = ((opcode & rd_mask) >> 12);
//Unary operations only have operand 2 (which is denoted by b everywhere else)
bool shift_carry = false;
uint operand = EvaluateOperand2(opcode, ref shift_carry);
uint result = UnaryOp(operand);
SaveResult(Rd, result);
SetFlags(opcode, Rd, result, shift_carry);
return 1;
});
}
internal InstructionFunc GenerateAWCDataOp(DataOpEvaluateOperand2Func EvaluateOperand2, DataOpAWCOperation AWCOp, DataOpSaveResultFunc SaveResult, DataOpHandleSetFlagsAWCFunc SetFlags)
{
return(delegate(uint opcode)
{
uint Rd = ((opcode & rd_mask) >> 12);
uint Rn = ((opcode & rn_mask) >> 16);
uint a = get_reg(Rn);
bool shift_carry = false;
uint b = EvaluateOperand2(opcode, ref shift_carry);
AWCResult awcResult = AWCOp(a, b);
SaveResult(Rd, awcResult.result);
SetFlags(opcode, Rd, awcResult);
return 1;
});
}
internal InstructionFunc GenerateLogicalDataOpBinary(DataOpEvaluateOperand2Func EvaluateOperand2, DataOpLogicalBinary BinaryOp, DataOpSaveResultFunc SaveResult, DataOpHandleSetFlagsFunc SetFlags)
{
return(delegate(uint opcode)
{
uint Rd = ((opcode & rd_mask) >> 12);
uint Rn = ((opcode & rn_mask) >> 16);
uint a = get_reg(Rn);
bool shift_carry = false;
uint b = EvaluateOperand2(opcode, ref shift_carry);
uint result = BinaryOp(a, b);
SaveResult(Rd, result);
SetFlags(opcode, Rd, result, shift_carry);
return 1;
});
}
