On Thu, 10 Sep 2020 15:35:37 +0000, Seymour J Metz wrote: >Yes, you can always do multiple precision that way, but there is a performance >hit, especially from those conditional branches. Maybe we need skip >instructions such as the 7090 had.
Some computer architectures have an Add-With-Carry instruction eliminating the need for some of those conditional branches. ________________________________________ From: Thomas David Rivers Sent: Wednesday, September 9, 2020 8:35 PM Seymour J Metz wrote: > You would not need vector instructions to support FIXED BIN(127,s) (quad-word scaled or unscaled integers if s is 0.) In fact, you could do it with 370 code (our C compiler happens to do that for __int128 and __uint128.) -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
