Personally, I like to define my own register equates. This allows me to also comment on their use at the same time they are defined rather than separately.
Christopher J Pomasl Principal Software Engineer, CA Technologies, inc Lead, Sound of the Rockies barbershop chorus Always remember, you are unique...just like everyone else. On 08/01/2013 07:41 AM, Victor Gil wrote: > Personally, I never liked YREGS macro, mainly for 2 reasons - it's not > elegant and it doesn't account for already defined registers. > > So here's an alternative > > MACRO > MREGS > .* DEFINE GENERAL-PURPOSE REGISTERS (EXCEPT THOSE ALREADY DEFINED) > &N SETA 0 > .LOOP AIF (&N GT 15).DONE > &T SETC 'R&N' > AIF (D'&T).SKIP > R&N EQU &N > .SKIP ANOP > &N SETA &N+1 > AGO .LOOP > .DONE MEND > > -Victor- > > > > On Thu, 1 Aug 2013 06:30:41 -0500, Baron Carter > <[email protected]> wrote: > >> And there is ASMDREG which also has equates for other registers:- Access, >> Control, Floating Point.... >> >> -----Original Message----- >> From: IBM Mainframe Assembler List [mailto:[email protected]] >> On Behalf Of Paul Gilmartin >> Sent: Wednesday, July 31, 2013 16:34 >> To: [email protected] >> Subject: Re: YREGS MACRO doc? >> >> On 2013-07-31 15:01, Gerhard Postpischil wrote: >>> On 7/31/2013 1:44 PM, Bernd Oppolzer wrote: >>>> When I came to the site where I am actually working 25 years ago, I >>>> was very surprised that they use RA to RF for 10 to 15 - I never met >>>> that before, but you get accustomed to that very quickly. It's always >>>> two characters, after all ... >>> I first came across this form in the OS/360 reader/interpreter. >>> Personally I don't like it because searches on RB and RE get many more >>> false hits than R11 and R14. >>> >> And, of course, since there's no standard, the system macros must use pure >> numeric designators. And with a mixture of conventions, XREF doesn't >> reliably list register references. >> IATYREGS is somewhat unusual among IBM macros in that it sets a flag so it >> can exit if it's used twice, and some other JES3 macros invoke IATYREGS so >> they _can_ use register mnemonics. >> >> I think I've also seen GR0-GR15, which likewise reduces the likelihood of >> false hits in searches. >> >> CDC 6600 et al. made the register names predefined, reserved, and > mandatory. >> It was impossible to confuse L and LR; the operands distinguish them. And >> no need for unintuitive conventions such as "7" means constant 7 and "(7)" >> means register 7 in macro arguments. It was "7" or "X7". So, no need for >> such as IHBINRRA. And less incentive to print macro expansions; they did >> what they appeared to from the call. >> >> -- gil
