On Wed, 15 Sep 2010 08:00:07 -0400, Robert A. Rosenberg wrote: > >If the 64-bit program calling the 24/31 bit program wants to insure >the integrity of the high end of the registers, it is ITS >responsibility to save them around the call.
That is incorrect. As clearly documented in the Assembler Services Guide, <quote> Unless otherwise defined by the individual interface, the calling program should expect, upon return, that - The low halves (Bits 32-63) of GPRs 2 through 13 are unchanged - The high halves (Bits 0-31) of GPRs 2 through 14 are unchanged </quote> >So long as the called program >wants a old-style Format 1 Save area, the high end is subject to >being altered. There is no such thing as a format 1 save area. You are referring to a standard 72-byte save area. -- Tom Marchant ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
