public OpCodeMemImm(InstDescriptor inst, ulong address, int opCode) : base(inst, address, opCode)
{
Extend64 = ((opCode >> 22) & 3) == 2;
WBack = ((opCode >> 24) & 1) == 0;
// The type is not valid for the Unsigned Immediate 12-bits encoding,
// because the bits 11:10 are used for the larger Immediate offset.
MemOp type = WBack ? (MemOp)((opCode >> 10) & 3) : MemOp.Unsigned;
PostIdx = type == MemOp.PostIndexed;
Unscaled = type == MemOp.Unscaled ||
type == MemOp.Unprivileged;
// Unscaled and Unprivileged doesn't write back,
// but they do use the 9-bits Signed Immediate.
if (Unscaled)
{
WBack = false;
}
if (WBack || Unscaled)
{
// 9-bits Signed Immediate.
Immediate = (opCode << 11) >> 23;
}
else
{
// 12-bits Unsigned Immediate.
Immediate = ((opCode >> 10) & 0xfff) << Size;
}
}
public AOpCodeMemImm(AInst Inst, long Position, int OpCode) : base(Inst, Position, OpCode)
{
Extend64 = ((OpCode >> 22) & 3) == 2;
WBack = ((OpCode >> 24) & 1) == 0;
//The type is not valid for the Unsigned Immediate 12-bits encoding,
//because the bits 11:10 are used for the larger Immediate offset.
MemOp Type = WBack ? (MemOp)((OpCode >> 10) & 3) : MemOp.Unsigned;
PostIdx = Type == MemOp.PostIndexed;
Unscaled = Type == MemOp.Unscaled ||
Type == MemOp.Unprivileged;
//Unscaled and Unprivileged doesn't write back,
//but they do use the 9-bits Signed Immediate.
if (Unscaled)
{
WBack = false;
}
if (WBack || Unscaled)
{
//9-bits Signed Immediate.
Imm = (OpCode << 43) >> 55;
}
else
{
//12-bits Unsigned Immediate.
Imm = ((OpCode >> 10) & 0xfff) << Size;
}
}
