From: Paul Zimmermann <Paul.Zimmermann@inria.fr>
To: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
Cc: Szabolcs.Nagy@arm.com, libc-alpha@sourceware.org
Subject: Re: [PATCH 1/5] Remove slow paths from asin
Date: Fri, 08 Jan 2021 11:29:45 +0100 [thread overview]
Message-ID: <mwzh1jk9gm.fsf@tomate.loria.fr> (raw)
In-Reply-To: <VE1PR08MB55995AFCDB2947DAB321979083AF0@VE1PR08MB5599.eurprd08.prod.outlook.com> (message from Wilco Dijkstra on Thu, 7 Jan 2021 19:36:56 +0000)
Dear Wilco,
the v2 of this series is ok for me, except in the meantime I have found a
larger error for tan:
tan 0 -1 0x1.c673a473b3503p+3 [0.619] 0.618365 0.6183652837454632
thus you could replace ~0.612 by ~0.619.
Let me summarize the largest errors we get with 2.32 and after this patch
(on random sampling):
2.32 after patch (with corresponding input)
asin 0.500 0.516 0x1.07fffeadab7ecp-3
acos 0.501 0.523 0x1.dffff776c7505p-1
tan 0.500 0.619 0x1.c673a473b3503p+3
atan 0.500 0.523 -0x1.f9004176e07bep-4
atan2 0.500 0.524 0x1.4aa3aada7c44fp-996,0x1.4f32ff56386e8p-993
Best regards,
Paul
next prev parent reply other threads:[~2021-01-08 10:29 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-04 12:11 [PATCH 0/5] Remove remaining slow paths from math functions Wilco Dijkstra
2021-01-04 12:15 ` [PATCH 1/5] Remove slow paths from asin Wilco Dijkstra
2021-01-04 16:25 ` Paul Zimmermann
2021-01-04 17:06 ` Szabolcs Nagy
2021-01-04 17:41 ` Paul Zimmermann
2021-01-07 19:36 ` Wilco Dijkstra
2021-01-08 10:29 ` Paul Zimmermann [this message]
2021-01-07 19:23 ` [PATCH v2 1/5] Remove remaining slow paths from asin and acos Wilco Dijkstra
2021-01-04 12:17 ` [PATCH 2/5] Remove slow paths in tan Wilco Dijkstra
2021-01-04 16:36 ` Paul Zimmermann
2021-01-07 19:25 ` [PATCH v2 " Wilco Dijkstra
2021-01-04 12:19 ` [PATCH 3/5] Remove slow paths from atan Wilco Dijkstra
2021-01-04 16:43 ` Paul Zimmermann
2021-01-07 19:26 ` [PATCH v2 " Wilco Dijkstra
2021-01-04 12:21 ` [PATCH 4/5] Remove slow paths from atan2 Wilco Dijkstra
2021-01-04 16:49 ` Paul Zimmermann
2021-01-07 19:28 ` [PATCH v2 " Wilco Dijkstra
2021-01-04 12:25 ` [PATCH 5/5] Remove mpa files Wilco Dijkstra
2021-01-07 20:12 ` [PATCH v2 " Wilco Dijkstra
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