public VariableAttributes[] GetListByClass(RegisterClass @class)
{
var tmp = new VariableAttributes[AttributesCount - Start.Get(@class)];
Array.Copy(Attributes, Start.Get(@class), tmp, 0, AttributesCount - Start.Get(@class));
return(tmp);
}
public void CopyFrom(VariableAttributes va)
{
VariableData = va.VariableData;
Flags = va.Flags;
UsageCount = va.UsageCount;
InRegIndex = va.InRegIndex;
OutRegIndex = va.OutRegIndex;
InRegs = va.InRegs;
AllocableRegs = va.AllocableRegs;
}
public VariableMap(int attrCount)
{
InRegs = new RegisterMask();
OutRegs = new RegisterMask();
ClobberedRegs = new RegisterMask();
Start = new RegisterCount();
Count = new RegisterCount();
AttributesCount = attrCount;
Attributes = new VariableAttributes[attrCount].InitializeWith(() => new VariableAttributes());
}
private static void PrepareSingleVariableInstruction(InstructionId instId, VariableAttributes va)
{
switch (instId)
{
// - andn reg, reg ; Set all bits in reg to 0.
// - xor/pxor reg, reg ; Set all bits in reg to 0.
// - sub/psub reg, reg ; Set all bits in reg to 0.
// - pcmpgt reg, reg ; Set all bits in reg to 0.
// - pcmpeq reg, reg ; Set all bits in reg to 1.
case InstructionId.Pandn:
case InstructionId.Xor:
case InstructionId.Xorpd:
case InstructionId.Xorps:
case InstructionId.Pxor:
case InstructionId.Sub:
case InstructionId.Psubb:
case InstructionId.Psubw:
case InstructionId.Psubd:
case InstructionId.Psubq:
case InstructionId.Psubsb:
case InstructionId.Psubsw:
case InstructionId.Psubusb:
case InstructionId.Psubusw:
case InstructionId.Pcmpeqb:
case InstructionId.Pcmpeqw:
case InstructionId.Pcmpeqd:
case InstructionId.Pcmpeqq:
case InstructionId.Pcmpgtb:
case InstructionId.Pcmpgtw:
case InstructionId.Pcmpgtd:
case InstructionId.Pcmpgtq:
va.Flags &= ~VariableFlags.RReg;
break;
// - and reg, reg ; Nop.
// - or reg, reg ; Nop.
// - xchg reg, reg ; Nop.
case InstructionId.And:
case InstructionId.Andpd:
case InstructionId.Andps:
case InstructionId.Pand:
case InstructionId.Or:
case InstructionId.Orpd:
case InstructionId.Orps:
case InstructionId.Por:
case InstructionId.Xchg:
va.Flags &= ~VariableFlags.WReg;
break;
}
}