The question is what reasonable use is there is of USING on a number? I'm not sure what the rest of this post means, but it doesn't seem relevant.
sas On Mon, Nov 11, 2019 at 2:35 PM Paul Gilmartin < 00000014e0e4a59b-dmarc-requ...@listserv.uga.edu> wrote: > On 2019-11-11, at 09:08:39, Steve Smith wrote: > > > > I must agree that USING on numbers is a questionable feature; also > operand > > 1 doesn't have to be 0, anything up to 2gb should work. > > > What's "questionable"? Should the Assembler require a > relocatable expression? Why? > > An old (BitSavers) Assembler manual said the allowed range > was (1-2**24,2**24-1). HLASM says, "non-negative". I don't > believe either restriction was ever enforced. > > What does "negative" mean for a relocatable expression? Does > it depdend on the address at which the CSECT/DSECT gets loaded? > > > ... My guess is somebody in 1964 thought it was a good idea. > > > Prior to the advent of immediate instructions there was no better > alternative. > > -- gil > -- sas
