From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeffrey A Law To: "John David Anglin" Cc: meissner@cygnus.com, gcc-patches@gcc.gnu.org Subject: Re: PATCH: HUGE_VAL should be Infinity Date: Sun, 03 Dec 2000 21:14:00 -0000 Message-id: <752.975651561@upchuck> References: <200011302016.PAA28575@hiauly1.hia.nrc.ca> X-SW-Source: 2000-12/msg00144.html In message <200011302016.PAA28575@hiauly1.hia.nrc.ca>you write: > The fneg instruction on PA2.0 gear does negate +0. correctly. Thus, there > is only a problem with PA1.0 and PA1.1 hardware which uses fsub. The HP > compiler doesn't have the problem since it multiplies by -1. instead. I think there was a case where that's not 100% valid either, though I think it would be closer to conforming behavior than fsub. FWIW, it may be the case that PA1.0 had fneg -- I don't have my manuals handy, but there were a few instructions in PA1.0 that got removed. But I'm 100% certain fneg is available for PA2.0 and it does the right thing (I already checked it some time ago). jeff