This is the mail archive of the
libc-alpha@sourceware.org
mailing list for the glibc project.
Re: [PATCH] Fix cos computation for multiple precision fallback (bz #20357)
- From: Siddhesh Poyarekar <siddhesh at sourceware dot org>
- To: libc-alpha at sourceware dot org
- Cc: mclay at lycos dot com, adhemerval dot zanella at linaro dot org
- Date: Wed, 13 Jul 2016 16:13:25 +0530
- Subject: Re: [PATCH] Fix cos computation for multiple precision fallback (bz #20357)
- Authentication-results: sourceware.org; auth=none
- References: <1468313523-18716-1-git-send-email-siddhesh@sourceware.org>
On Tue, Jul 12, 2016 at 02:22:03PM +0530, Siddhesh Poyarekar wrote:
> During the sincos consolidation I made two mistakes, one was a logical
> error due to which cos(0x1.8475e5afd4481p+0) returned
> sin(0x1.8475e5afd4481p+0) instead.
>
> The second issue was an error in negating inputs for the correct
> quadrants for sine. I could not find a suitable test case for this
> despite running a program to search for such an input for a couple of
> hours.
FYI, I have added this as a blocker for 2.24.
Siddhesh