Date: Sun, 18 Jan 2004 15:03:13 -0800 From: David Schultz <das@FreeBSD.ORG> To: Marcel Moolenaar <marcel@xcllnt.net>, src-committers@FreeBSD.ORG, cvs-src@FreeBSD.ORG, cvs-all@FreeBSD.ORG Subject: Re: cvs commit: src/lib/libc/gdtoa Makefile.inc _hdtoa.c src/lib/libc/stdio vfprintf.c Message-ID: <20040118230313.GB56462@VARK.homeunix.com> In-Reply-To: <20040118215632.GA56462@VARK.homeunix.com> References: <200401181032.i0IAWoMh012953@repoman.freebsd.org> <20040118103340.GA44149@VARK.homeunix.com> <20040118210356.GA82925@dhcp01.pn.xcllnt.net> <20040118215632.GA56462@VARK.homeunix.com>
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On Sun, Jan 18, 2004, David Schultz wrote: > The correct result is 4.940656e-324, which is denormalized. Some > architectures generate a trap for denormals and expect them to be > handled in software, but I didn't think that IA64 was one of them. > I'm looking over the IA64 architecture manual now to see if I can > figure out what's going on... Upon further examination, it looks like IA64 *does* delegate the edge cases of the IEEE 754 standard to software, unlike the x86. This implies that there may be a problem with the software assist routines that the kernel calls when it gets a trap. I don't have any IA64 hardware to muck around with, though, so I can't tell you anything more.
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