Messages in this thread | | | From | Kumar Gala <> | Subject | Re: math-emu issue with fp divide | Date | Fri, 27 Jun 2008 08:48:33 -0500 |
| |
On Jun 12, 2008, at 11:24 PM, David Miller wrote:
> From: Kumar Gala <galak@kernel.crashing.org> > Date: Thu, 5 Jun 2008 08:38:44 -0500 (CDT) > >> Now that I'm digging into this a bit I'm thinking my issue has to >> do with >> the fix you put in place from back in Aug 2007 (commit >> 405849610fd96b4f34cd1875c4c033228fea6c0f): >> >> [MATH-EMU]: Fix underflow exception reporting. >> >> 2) we ended up rounding back up to normal (this is the case where >> we set the exponent to 1 and set the fraction to zero), this >> should set inexact too >> ... >> >> Another example, "0x0.0000000000001p-1022 / 16.0", should signal >> both >> inexact and underflow. The cpu implementations and ieee1754 >> literature is very clear about this. This is case #2 above. >> >> I'm not clear from your commit comment on what actual number >> 0x0.0....01p-1022 is? > > I haven't been able to look closely at this yet but I think I > happened to stumble over the test case that lead me to that > changeset you are referencing here.
Have you had a chance to look at this?
- k
| |