From: Sebastian Huber <sebastian.huber@embedded-brains.de>
To: Kito Cheng <kito.cheng@gmail.com>
Cc: newlib@sourceware.org
Subject: Re: [PATCH] Workaround for ffs() on LP64 targets
Date: Thu, 27 Jul 2017 08:40:00 -0000 [thread overview]
Message-ID: <d2568bac-3098-e2a3-422f-091e76d96538@embedded-brains.de> (raw)
In-Reply-To: <CA+yXCZBKQQpJ+Gwo2odKC7GoBHUY_JiFarFuweNOQcHVMpB11w@mail.gmail.com>
On 27/07/17 10:29, Kito Cheng wrote:
> it's will make aarch64 gen worse code (compare to __builtin_ffs
> version) since aarch64 have clz, but I don't have better idea too...
Maybe we should add a defined(__riscv__). A count leading zeros
instruction is quite common.
--
Sebastian Huber, embedded brains GmbH
Address : Dornierstr. 4, D-82178 Puchheim, Germany
Phone : +49 89 189 47 41-16
Fax : +49 89 189 47 41-09
E-Mail : sebastian.huber@embedded-brains.de
PGP : Public key available on request.
Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
next prev parent reply other threads:[~2017-07-27 8:40 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-27 8:06 Sebastian Huber
2017-07-27 8:29 ` Kito Cheng
2017-07-27 8:40 ` Sebastian Huber [this message]
2017-07-27 9:01 ` Kito Cheng
2017-07-27 11:13 ` Eric Blake
2017-07-27 11:25 ` Sebastian Huber
2017-07-27 12:27 ` Corinna Vinschen
2017-07-27 12:34 ` Sebastian Huber
2017-07-27 12:49 ` Corinna Vinschen
2017-07-27 12:53 ` Sebastian Huber
2017-07-27 21:03 ` Brian Inglis
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