On 2016-03-28, at 16:18, Ngan, Robert wrote: > For non-relocatable values, the range of Y values is the same as a signed > halfword. > In my case, I want unsigned values so I can't use Y. > I ended up coding: > > DC AL2(expr) > DS 0XL(65536-expr) ASSERT: expr was not truncated > HLASM Ref. tells me that the allowed values of the length modifier of an X constant are [1,256]. But is this enforced?
You might want to force halfword alignment. Given that the hardware now supports unsigned halfwords, perhaps HLASM should accommodate. Perhaps HU'65535' or YU(65535). OTOH, it's an assembler; programmers should know what they're doing. But perhaps HLASM needs an ASSERT instruction. -- gil
