John, I agree that the HLASM Reference is a bit difficult to use. This information is under the "DC instruction", "Subfield 6: Nominal Value" page 169.
On Tue, 3 Apr 2012 11:24:20 -0400, John Gilmore wrote: >David, > >Thank you very much. I think I can find out everything else I need to >know experimentally using variations on your examples. > >Where are these constructions documented? I have not found them in >the HL:ASM 1.6 Language Reference. > >On 4/3/12, David Bond <[email protected]> wrote: >> Which values do you want that are not provided by DD'+(INF)' or DB'(QNAN)' ? >> >> On Tue, 3 Apr 2012 10:03:20 -0400, John Gilmore wrote: >>>This post is a specialized one that will be of interrest only to those >>>who work with binary and/or decimal floating-point values in assembly >>>language. >>> >>>I am in the process of extending some table-generation machinery to >>>support the use of >>>1) positive and negative infinities, which compare larger and smaller >>>than other values, and 2) NaNs (Not-a-Number values), both signaling >>>and quiet ones, which are useful, among other things, as placeholders >>>for missing or uninitialized table elements. >>> >>>These special values all have defined hardware representations, and I >>>now come to my question. Are there plans to provide mechanisms for >>>generating these special values using the HLASM without resorting to >>>bit-string constructions? >>> >>>Peter Elderon and his PL/I group have provided BIFs and the like for >>>doing so; there is reason that something like these facilities is or >>>will be available in C; and it would be very convenient to have a >>>standard assembly-language facility for doing so too. >>> >>>John Gilmore - Ashland, MA 01721 - USA >> > > >-- >John Gilmore, Ashland, MA 01721 - USA
