On Thu, 4 Feb 2010 21:35:14 +0100, Abe Kornelis wrote: >Paul Gilmartin wrote: >> SYS1.MACLIB(RETURN) also contains: >> >> OI 15(13),X'01' SET RETURN INDICATION > >That would set the low-order bit of R14, which is the >save return address. In the 24-bit and 31-bit environs >that would make the return address invalid.
Yes, but that is irrelevant, since R14 has already been loaded. >Nifty, >but tricky when you're doing 64-bit stuff. If you are using 64-bit registers you shouldn't be using a 72-byte save area. > >I gave it a quick look, but there seem to be so many >logic paths through the macro that I kinda lost track. >By the look of it, it won't generate the OI instruction >in all cases... Only if "T" is specified. See the RETURN documentation. -- Tom Marchant ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
