protected void MakeStackOp(StackOp op, int size, MemorySpace space, int offset, Expr indexExpr, ArrayList bytecodeList)
{
// Not for MemorySpace.MEM ops.
if (indexExpr != null)
{
indexExpr.MakeByteCode(true, bytecodeList);
}
int opcode;
if (offset < 32
&& size == 4
&& (space == MemorySpace.VAR || space == MemorySpace.LOCAL)
&& indexExpr == null)
{ // Use the short form if possible
if ((offset & 3) != 0)
throw new ParseException("Non-long offset", Token);
opcode = space == MemorySpace.VAR ? 0x40 : 0x60; // VAR / LOCAL
opcode |= (byte)op;
bytecodeList.Add((byte)(opcode + offset));
}
else // we have to use the long form
{
opcode = 0x80 | ((size >> 1) << 5) | ((int)space << 2) | (int)op;
if (indexExpr != null)
{
opcode |= 0x10;
}
if (offset < 128)
{
bytecodeList.Add((byte)opcode);
bytecodeList.Add((byte)offset);
}
else
{
bytecodeList.Add((byte)opcode);
bytecodeList.Add((byte)(offset >> 8 | 0x80));
bytecodeList.Add((byte)offset);
}
}
}
protected static void MakeStackOp(StackOp op, int size, Expr indexExpr1, Expr indexExpr2, ArrayList bytecodeList)
{
// Only for MemorySpace.MEM ops.
// indexExpr1 should be non-null; indexExpr1 might be null.
indexExpr1.MakeByteCode(true, bytecodeList);
if (indexExpr2 != null)
{
indexExpr2.MakeByteCode(true, bytecodeList);
}
int opcode;
opcode = 0x80 | ((size >> 1) << 5) | ((int)MemorySpace.MEM << 2) | (int)op;
if (indexExpr2 != null)
{
opcode |= 0x10;
}
bytecodeList.Add((byte)opcode);
}