On Wed, 26 Jun 2013 07:45:20 -0500, John McKown wrote: >I will go with what another replier >said: "If you use it, you must restore it".
That was me. >The caller has a right to >expect all the registers to come back after the CALL with the same contents >that they had before the call. With the exception of R0, R1, R14, and R15. The linkage conventions say that the high halves of registers 2 through 14 are unchanged when you return to your caller. >I guess I could put bits 32..64 into bits 0..31 of, say, R0. Yes, you could do that. -- Tom Marchant ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
