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Re: Improve tgamma accuracy (bug 18613) [committed]
- From: Joseph Myers <joseph at codesourcery dot com>
- To: Szabolcs Nagy <szabolcs dot nagy at arm dot com>
- Cc: "libc-alpha at sourceware dot org" <libc-alpha at sourceware dot org>
- Date: Thu, 2 Jul 2015 13:57:45 +0000
- Subject: Re: Improve tgamma accuracy (bug 18613) [committed]
- Authentication-results: sourceware.org; auth=none
- References: <alpine dot DEB dot 2 dot 10 dot 1506292329590 dot 25673 at digraph dot polyomino dot org dot uk> <alpine dot DEB dot 2 dot 10 dot 1507012145120 dot 29365 at digraph dot polyomino dot org dot uk> <55953573 dot 6070200 at arm dot com> <55953F61 dot 80506 at arm dot com>
On Thu, 2 Jul 2015, Szabolcs Nagy wrote:
> On 02/07/15 13:58, Szabolcs Nagy wrote:
> >
> > hm i tried to verify this on aarch64 and also regenerate the libm ulps
> >
> > but the new ulps file somehow become much smaller than expected
> >
>
> it was because builddir/math/libm-test-ulps.h was non-empty
>
> (it is generated at glibc build time not at make regen-ulps
> time as i assumed)
I don't think it *should* be generated at build time (the only thing that
needs ulps information at build time should be the table in the manual),
but don't know offhand what dependency is causing it to be generated
early. Also, even if generated early, it ought not to break regen-ulps
for the header to be already present - so that sounds like a makefile
issue as well.
--
Joseph S. Myers
joseph@codesourcery.com