From: Siddhesh Poyarekar <siddhesh@gotplt.org>
To: Wilco Dijkstra <Wilco.Dijkstra@arm.com>,
"libc-alpha@sourceware.org" <libc-alpha@sourceware.org>
Cc: nd <nd@arm.com>
Subject: Re: [PATCH 2/6] Remove slow paths from sin/cos
Date: Fri, 09 Mar 2018 16:17:00 -0000 [thread overview]
Message-ID: <8065ca77-ec8f-9925-7e9c-52266cd1e4c6@gotplt.org> (raw)
In-Reply-To: <DB6PR0801MB2053788EB64591EC936E598683DE0@DB6PR0801MB2053.eurprd08.prod.outlook.com>
On Friday 09 March 2018 09:16 PM, Wilco Dijkstra wrote:
> This patch removes 2nd of the 3 range reduction cases and defer to the final one.
> Input values above 2^27 are extremely rare, so this case doesn't need to as be
> optimized as smaller inputs.
Please elaborate on two more points:
- The basis for your claim that values above 2^27 are extremely rare,
i.e. papers that you may have referred that conclude this and/or
applications you may have profiled
- The quantum of performance loss due to dropping the 2nd case.
Thanks,
Siddhesh
next prev parent reply other threads:[~2018-03-09 16:17 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-09 15:46 Wilco Dijkstra
2018-03-09 16:17 ` Siddhesh Poyarekar [this message]
2018-03-09 18:19 ` Ondřej Bílka
2018-03-09 18:52 ` Zack Weinberg
2018-03-09 23:05 ` Steve Ellcey
2018-03-10 0:52 ` Joseph Myers
2018-03-12 15:36 ` Wilco Dijkstra
2018-03-12 15:46 ` Zack Weinberg
2018-03-12 16:10 ` Joseph Myers
2018-03-12 21:13 ` Wilco Dijkstra
2018-03-09 19:06 ` Wilco Dijkstra
2018-03-09 19:31 ` Siddhesh Poyarekar
2018-03-12 18:09 ` Wilco Dijkstra
2018-03-13 8:53 ` Siddhesh Poyarekar
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