private static void SaveCheck(UrclInstruction inst, out bool saveA, out bool saveB, out bool saveC, out bool saveD)
{
saveA = false;
saveB = false;
saveC = false;
saveD = false;
if (inst.AType == OperandType.Register)
{
if (inst.A != 1)
{
saveA = true;
}
if (inst.A != 2)
{
saveB = true;
}
if (inst.A != 3)
{
saveC = true;
}
if (inst.A != 4)
{
saveD = true;
}
}
}
#pragma warning restore IDE0060 // Remove unused parameter
private static void OrganizeInputs(Action <UrclInstruction> emit, UrclInstruction inst, ulong temporary)
{
if (inst.BType == OperandType.Register && inst.CType == OperandType.Register)
{
if (inst.B == 2 && inst.C == 1)
{
emit(new UrclInstruction(Operation.MOV, OperandType.Register, temporary, OperandType.Register, inst.C));
emit(new UrclInstruction(Operation.MOV, OperandType.Register, 1, OperandType.Register, inst.B));
emit(new UrclInstruction(Operation.MOV, OperandType.Register, 2, OperandType.Register, temporary));
}
else if (inst.C == 1)
{
emit(new UrclInstruction(Operation.MOV, OperandType.Register, 2, OperandType.Register, inst.C));
emit(new UrclInstruction(Operation.MOV, OperandType.Register, 1, OperandType.Register, inst.B));
}
else
{
emit(new UrclInstruction(Operation.MOV, OperandType.Register, 1, OperandType.Register, inst.B));
emit(new UrclInstruction(Operation.MOV, OperandType.Register, 2, OperandType.Register, inst.C));
}
}
else
{
GetOperand(emit, inst, 1, 1);
GetOperand(emit, inst, 2, 2);
}
}
public static IEnumerable <UrclInstruction> MLT(UrclInstruction inst, ulong temporary)
{
var result = new List <UrclInstruction>();
var loop = new Label();
var skip = new Label();
SaveCheck(inst, out bool saveA, out bool saveB, out bool saveC, out _);
if (saveA)
{
result.Add(new UrclInstruction(Operation.PSH, OperandType.Register, 1));
}
if (saveB)
{
result.Add(new UrclInstruction(Operation.PSH, OperandType.Register, 2));
}
if (saveC)
{
result.Add(new UrclInstruction(Operation.PSH, OperandType.Register, 3));
}
OrganizeInputs(result.Add, inst, temporary);
result.Add(new UrclInstruction(Operation.MOV, OperandType.Register, 3, OperandType.Register, 0));
result.Add(new UrclInstruction(Operation.COMPILER_MARKLABEL, loop));
result.Add(new UrclInstruction(Operation.AND, OperandType.Register, 0, OperandType.Register, 1, OperandType.Immediate, 1));
result.Add(new UrclInstruction(Operation.BRZ, skip));
result.Add(new UrclInstruction(Operation.ADD, OperandType.Register, 3, OperandType.Register, 3, OperandType.Register, 2));
result.Add(new UrclInstruction(Operation.COMPILER_MARKLABEL, skip));
result.Add(new UrclInstruction(Operation.LSH, OperandType.Register, 2, OperandType.Register, 2));
result.Add(new UrclInstruction(Operation.RSH, OperandType.Register, 3, OperandType.Register, 3));
result.Add(new UrclInstruction(Operation.BNZ, loop));
if (inst.A != 3)
{
result.Add(new UrclInstruction(Operation.MOV, OperandType.Register, inst.A, OperandType.Register, 3));
}
if (saveC)
{
result.Add(new UrclInstruction(Operation.POP, OperandType.Register, 3));
}
if (saveB)
{
result.Add(new UrclInstruction(Operation.POP, OperandType.Register, 2));
}
if (saveA)
{
result.Add(new UrclInstruction(Operation.POP, OperandType.Register, 1));
}
return(result);
}
private static void GetOperand(Action <UrclInstruction> emit, UrclInstruction inst, ulong register, int operand)
{
switch (operand)
{
case 0:
{
if (inst.AType == OperandType.Register && inst.A != register)
{
emit(new UrclInstruction(Operation.MOV, OperandType.Register, register, OperandType.Immediate, inst.A));
}
else if (inst.AType == OperandType.Immediate)
{
emit(new UrclInstruction(Operation.IMM, OperandType.Register, register, OperandType.Immediate, inst.A));
}
else if (inst.AType == OperandType.Label)
{
emit(new UrclInstruction(Operation.IMM, OperandType.Register, register, inst.ALabel));
}
}
break;
case 1:
{
if (inst.BType == OperandType.Register && inst.B != register)
{
emit(new UrclInstruction(Operation.MOV, OperandType.Register, register, OperandType.Immediate, inst.B));
}
else if (inst.BType == OperandType.Immediate)
{
emit(new UrclInstruction(Operation.IMM, OperandType.Register, register, OperandType.Immediate, inst.B));
}
else if (inst.BType == OperandType.Label)
{
emit(new UrclInstruction(Operation.IMM, OperandType.Register, register, inst.BLabel));
}
}
break;
case 2:
{
if (inst.CType == OperandType.Register && inst.C != register)
{
emit(new UrclInstruction(Operation.MOV, OperandType.Register, register, OperandType.Immediate, inst.C));
}
else if (inst.CType == OperandType.Immediate)
{
emit(new UrclInstruction(Operation.IMM, OperandType.Register, register, OperandType.Immediate, inst.C));
}
else if (inst.CType == OperandType.Label)
{
emit(new UrclInstruction(Operation.IMM, OperandType.Register, register, inst.CLabel));
}
}
break;
default:
throw new ArgumentOutOfRangeException();
}
}
public static IEnumerable <UrclInstruction> RET(UrclInstruction inst, ulong temporary)
{
return(new[]
{
new UrclInstruction(Operation.POP, OperandType.Register, temporary),
new UrclInstruction(Operation.BRA, OperandType.Register, temporary)
});
}
public static IEnumerable <UrclInstruction> BOD(UrclInstruction inst, ulong temporary)
{
return(new[]
{
new UrclInstruction(Operation.AND, OperandType.Register, 0)
{
BType = inst.BType,
B = inst.B,
BLabel = inst.BLabel,
CType = OperandType.Immediate,
C = 1
},
new UrclInstruction(Operation.BNZ, inst.ALabel)
});
}
public static IEnumerable <UrclInstruction> CMP(UrclInstruction inst, ulong temporary)
{
return(new[]
{
new UrclInstruction(Operation.SUB, OperandType.Register, 0)
{
BType = inst.BType,
B = inst.B,
BLabel = inst.BLabel,
CType = inst.CType,
C = inst.C,
CLabel = inst.CLabel
}
});
}
public static IEnumerable <UrclInstruction> BSR(UrclInstruction inst, ulong temporary)
{
var result = new List <UrclInstruction>();
var loop = new Label();
var end = new Label();
SaveCheck(inst, out bool saveA, out bool saveB, out _, out _);
result.Add(new UrclInstruction(Operation.OR, OperandType.Register, 0, OperandType.Register, inst.C, OperandType.Register, inst.C));
result.Add(new UrclInstruction(Operation.BRZ, end));
if (saveA)
{
result.Add(new UrclInstruction(Operation.PSH, OperandType.Register, 1));
}
if (saveB)
{
result.Add(new UrclInstruction(Operation.PSH, OperandType.Register, 2));
}
OrganizeInputs(result.Add, inst, temporary);
result.Add(new UrclInstruction(Operation.COMPILER_MARKLABEL, loop));
result.Add(new UrclInstruction(Operation.RSH, OperandType.Register, 1, OperandType.Register, 1));
result.Add(new UrclInstruction(Operation.DEC, OperandType.Register, 2, OperandType.Register, 2));
result.Add(new UrclInstruction(Operation.BNZ, loop));
if (inst.A != 1)
{
result.Add(new UrclInstruction(Operation.MOV, OperandType.Register, inst.A, OperandType.Register, 1));
}
if (saveB)
{
result.Add(new UrclInstruction(Operation.POP, OperandType.Register, 2));
}
if (saveA)
{
result.Add(new UrclInstruction(Operation.POP, OperandType.Register, 1));
}
result.Add(new UrclInstruction(Operation.COMPILER_MARKLABEL, end));
return(result);
}
public static IEnumerable <UrclInstruction> Convert(UrclInstruction instruction, OperationType maximumTier, ulong temporaryRegister, out bool changed)
{
var attrib = instruction.Operation.GetAttributes();
if (attrib.Type <= maximumTier)
{
changed = false;
return(new[] { instruction });
}
else
{
if (Converters.TryGetValue(instruction.Operation, out MethodInfo converter))
{
changed = true;
return((IEnumerable <UrclInstruction>)converter.Invoke(null, new object[] { instruction, temporaryRegister }));
}
else
{
if (attrib.Type == OperationType.CustomPragma)
{
changed = true;
return(new UrclInstruction[0]);
}
else
{
changed = true;
return(new[]
{
new UrclInstruction(Operation.COMPILER_PRAGMA, new[]
{
"WARNING",
"CONVERSION",
instruction.Operation.ToString().ToUpper(),
maximumTier.ToString().ToUpper()
}),
new UrclInstruction(Operation.COMPILER_COMMENT, new[]
{
$"Failed to convert operation {instruction.Operation} to {maximumTier.ToString().ToLower()} or lower."
})
});
}
}
}
}
public static IEnumerable <UrclInstruction> CAL(UrclInstruction inst, ulong temporary)
{
var result = new List <UrclInstruction>();
var returnPoint = new Label();
result.Add(new UrclInstruction(Operation.PSH, returnPoint));
if (inst.AType == OperandType.Label)
{
result.Add(new UrclInstruction(Operation.BRA, inst.ALabel));
}
else
{
result.Add(new UrclInstruction(Operation.BRA, inst.AType, inst.A));
}
result.Add(new UrclInstruction(Operation.COMPILER_MARKLABEL, returnPoint));
return(result);
}
public UrclInstruction[] Optimize(UrclInstruction[] instructions)
{
var insts = new List <UrclInstruction>(instructions);
if (CullUnusedLabels)
{
var labels = insts
.Where(i => i.Operation == Operation.COMPILER_MARKLABEL && i.ALabel != null)
.Select(i => i.ALabel)
.ToList();
foreach (var inst in insts)
{
if (inst.Operation != Operation.COMPILER_MARKLABEL && inst.Operation != Operation.COMPILER_CREATELABEL)
{
if (inst.ALabel != null && labels.Contains(inst.ALabel))
{
labels.Remove(inst.ALabel);
}
if (inst.BLabel != null && labels.Contains(inst.BLabel))
{
labels.Remove(inst.BLabel);
}
if (inst.CLabel != null && labels.Contains(inst.CLabel))
{
labels.Remove(inst.CLabel);
}
}
}
for (int i = 0; i < insts.Count; i++)
{
var inst = insts[i];
if (inst.Operation == Operation.COMPILER_MARKLABEL && labels.Contains(inst.ALabel))
{
insts.RemoveAt(i);
i--;
}
}
}
for (int i = 0; i < insts.Count; i++)
{
var current = insts[i];
UrclInstruction next = null;
int gap = 1;
for (int j = 1; i + j < insts.Count; j++, gap++)
{
next = insts[i + j];
if (next.Operation != Operation.COMPILER_COMMENT)
{
break;
}
}
if (CullRedundantStackOps && current.Operation == Operation.PSH)
{
if (next != null && next.Operation == Operation.POP)
{
if (current.A == next.A)
{
RemoveInstructionRange(insts, i, gap + 1, CullComments);
}
else
{
RemoveInstructionRange(insts, i + 1, gap, CullComments);
current.Operation = current.AType == OperandType.Register ? Operation.MOV : Operation.IMM;
current.BType = current.AType;
current.B = current.A;
current.BLabel = current.ALabel;
current.AType = next.AType;
current.A = next.A;
current.ALabel = next.ALabel;
}
i = 0;
}
}
else if (ReplaceImmZeroWithZeroRegister &&
current.Operation == Operation.IMM &&
current.BType == OperandType.Immediate &&
current.B == 0)
{
insts[i] = new UrclInstruction(Operation.MOV, insts[i].AType, insts[i].A, OperandType.Register, 0);
}
else if (CullCreateLabel && current.Operation == Operation.COMPILER_CREATELABEL)
{
insts.RemoveAt(i);
i = 0;
}
else if (CullComments && current.Operation == Operation.COMPILER_COMMENT)
{
insts.RemoveAt(i);
i = 0;
}
else if (CullPragmas && current.Operation == Operation.COMPILER_PRAGMA)
{
insts.RemoveAt(i);
i = 0;
}
else if (CullRedundantMoves &&
current.Operation == Operation.MOV &&
current.AType == OperandType.Register &&
current.BType == OperandType.Register &&
current.A == current.B)
{
insts.RemoveAt(i);
i = 0;
}
}
ulong temporaryRegister = 1;
var inUse = new List <ulong>();
foreach (var inst in insts)
{
if (inst.AType == OperandType.Register && !inUse.Contains(inst.A))
{
inUse.Add(inst.A);
}
if (inst.BType == OperandType.Register && !inUse.Contains(inst.B))
{
inUse.Add(inst.B);
}
if (inst.CType == OperandType.Register && !inUse.Contains(inst.C))
{
inUse.Add(inst.C);
}
}
while (inUse.Contains(temporaryRegister) && temporaryRegister < ulong.MaxValue)
{
temporaryRegister++;
}
List <UrclInstruction> result;
bool changed = true;
while (changed)
{
result = new List <UrclInstruction>(insts.Count);
changed = false;
foreach (var inst in insts)
{
result.AddRange(Conversion.Convert(inst, Compatibility, temporaryRegister, out bool hasChanged));
changed |= hasChanged;
}
if (changed)
{
insts = new List <UrclInstruction>(Optimize(result.ToArray()));
}
else
{
insts = result;
}
}
return(insts.ToArray());
}
public static IEnumerable <UrclInstruction> DIV(UrclInstruction inst, ulong temporary)
{
var result = new List <UrclInstruction>();
var top = new Label();
var loop = new Label();
var skipA = new Label();
var skipB = new Label();
var isZero = new Label();
var end = new Label();
SaveCheck(inst, out bool saveA, out bool saveB, out bool saveC, out bool saveD);
if (saveA)
{
result.Add(new UrclInstruction(Operation.PSH, OperandType.Register, 1));
}
if (saveB)
{
result.Add(new UrclInstruction(Operation.PSH, OperandType.Register, 2));
}
if (saveC)
{
result.Add(new UrclInstruction(Operation.PSH, OperandType.Register, 3));
}
if (saveD)
{
result.Add(new UrclInstruction(Operation.PSH, OperandType.Register, 4));
}
OrganizeInputs(result.Add, inst, temporary);
result.Add(new UrclInstruction(Operation.OR, OperandType.Register, 0, OperandType.Register, 2, OperandType.Register, 2));
result.Add(new UrclInstruction(Operation.BRZ, isZero));
result.Add(new UrclInstruction(Operation.MOV, OperandType.Register, 3, OperandType.Register, 0));
result.Add(new UrclInstruction(Operation.IMM, OperandType.Register, 4, OperandType.Immediate, 1));
result.Add(new UrclInstruction(Operation.COMPILER_MARKLABEL, top));
result.Add(new UrclInstruction(Operation.LSH, OperandType.Register, 3, OperandType.Register, 3));
result.Add(new UrclInstruction(Operation.LSH, OperandType.Register, 1, OperandType.Register, 1));
result.Add(new UrclInstruction(Operation.BRC, skipA));
result.Add(new UrclInstruction(Operation.COMPILER_MARKLABEL, loop));
result.Add(new UrclInstruction(Operation.SUB, OperandType.Register, 0, OperandType.Register, 3, OperandType.Register, 2));
result.Add(new UrclInstruction(Operation.BRN, skipB));
result.Add(new UrclInstruction(Operation.SUB, OperandType.Register, 3, OperandType.Register, 3, OperandType.Register, 2));
result.Add(new UrclInstruction(Operation.INC, OperandType.Register, 1, OperandType.Register, 1));
result.Add(new UrclInstruction(Operation.COMPILER_MARKLABEL, skipB));
result.Add(new UrclInstruction(Operation.LSH, OperandType.Register, 4, OperandType.Register, 4));
result.Add(new UrclInstruction(Operation.BRC, end));
result.Add(new UrclInstruction(Operation.BRA, top));
result.Add(new UrclInstruction(Operation.COMPILER_MARKLABEL, skipA));
result.Add(new UrclInstruction(Operation.INC, OperandType.Register, 3, OperandType.Register, 3));
result.Add(new UrclInstruction(Operation.BRA, loop));
result.Add(new UrclInstruction(Operation.COMPILER_MARKLABEL, isZero));
result.Add(new UrclInstruction(Operation.BRK));
result.Add(new UrclInstruction(Operation.COMPILER_MARKLABEL, end));
if (inst.A != 1)
{
result.Add(new UrclInstruction(Operation.MOV, OperandType.Register, inst.A, OperandType.Register, 1));
}
if (saveD)
{
result.Add(new UrclInstruction(Operation.POP, OperandType.Register, 4));
}
if (saveC)
{
result.Add(new UrclInstruction(Operation.POP, OperandType.Register, 3));
}
if (saveB)
{
result.Add(new UrclInstruction(Operation.POP, OperandType.Register, 2));
}
if (saveA)
{
result.Add(new UrclInstruction(Operation.POP, OperandType.Register, 1));
}
return(result);
}
public static IEnumerable <UrclInstruction> BRK(UrclInstruction inst, ulong temporary)
{
return(new[] { new UrclInstruction(Operation.HLT) });
}
public UrclInstruction[] Optimize(UrclInstruction[] instructions)
{
var insts = new List <UrclInstruction>(instructions);
for (int i = 0; i < insts.Count; i++)
{
var current = insts[i];
UrclInstruction next = null;
int gap = 1;
for (int j = 1; i + j < insts.Count; j++, gap++)
{
next = insts[i + j];
if (next.Operation != Operation.COMPILER_COMMENT)
{
break;
}
}
if (CullRedundantStackOps && current.Operation == Operation.PSH)
{
if (next != null && next.Operation == Operation.POP)
{
if (current.A == next.A)
{
RemoveInstructionRange(insts, i, gap + 1, CullComments);
}
else
{
RemoveInstructionRange(insts, i + 1, gap, CullComments);
current.Operation = Operation.MOV;
current.BType = current.AType;
current.B = current.A;
current.BLabel = current.ALabel;
current.AType = next.AType;
current.A = next.A;
current.ALabel = next.ALabel;
}
i = 0;
}
}
else if (ReplaceImmZeroWithZeroRegister && current.Operation == Operation.IMM)
{
if (current.BType == OperandType.Immediate && current.B == 0)
{
insts[i] = new UrclInstruction(Operation.MOV, insts[i].AType, insts[i].A, OperandType.Register, 0);
}
}
else if (CullCreateLabel && current.Operation == Operation.COMPILER_CREATELABEL)
{
insts.RemoveAt(i);
i = 0;
}
else if (CullComments && current.Operation == Operation.COMPILER_COMMENT)
{
insts.RemoveAt(i);
i = 0;
}
else if (CullPragmas && current.Operation == Operation.COMPILER_PRAGMA)
{
insts.RemoveAt(i);
i = 0;
}
}
return(insts.ToArray());
}