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Re: [PATCH COMMITTED] Regenerate sparc ULPs.
- From: "Joseph S. Myers" <joseph at codesourcery dot com>
- To: David Miller <davem at davemloft dot net>
- Cc: <stli at linux dot vnet dot ibm dot com>, <libc-alpha at sourceware dot org>
- Date: Wed, 23 Apr 2014 15:07:11 +0000
- Subject: Re: [PATCH COMMITTED] Regenerate sparc ULPs.
- Authentication-results: sourceware.org; auth=none
- References: <20140413 dot 231141 dot 1503644473158925927 dot davem at davemloft dot net> <lig7ro$h9q$1 at ger dot gmane dot org> <20140414 dot 133656 dot 645482096251855460 dot davem at davemloft dot net>
On Mon, 14 Apr 2014, David Miller wrote:
> From: Stefan Liebler <stli@linux.vnet.ibm.com>
> Date: Mon, 14 Apr 2014 10:56:24 +0200
>
> > on s390 test-ldouble / test-ildoubl shows the same ULP for y1(0x2p+0)
> > (see https://www.sourceware.org/ml/libc-alpha/2014-04/msg00271.html).
> >
> > Please test the posted patch.
>
> Yep, it clears the long-double cases for me.
>
> I still have a large ULP of 10 for test-float's y1_upward().
I'm going to guess that this doesn't appear on x86_64 because of the
x86_64 implementation of trig functions using double precision internally
so having smaller error accumulation than the generic flt-32 versions.
Saving / restoring the rounding mode in y1f would seem a reasonable
solution.
--
Joseph S. Myers
joseph@codesourcery.com