From: David Edelsohn <dje.gcc@gmail.com>
To: musl@lists.openwall.com
Subject: Re: [PATCH] s390x: Add single instruction math functions
Date: Sat, 10 Jun 2017 13:25:00 -0400 [thread overview]
Message-ID: <CAGWvnym1r-NrYBJ1cG69_3TjtON14qq8Dah+2+JP4vnxY0E5Kg@mail.gmail.com> (raw)
In-Reply-To: <20170610153648.GT9350@port70.net>
On Sat, Jun 10, 2017 at 11:36 AM, Szabolcs Nagy <nsz@port70.net> wrote:
> * David Edelsohn <dje.gcc@gmail.com> [2017-06-09 10:51:25 -0400]:
>> The following patch is a start at single instruction math functions
>> for s390x architecture to increase performance.
>
> looks good, i wonder why gcc does not have builtins support for
> ceil, floor, nearbyint, round and trunc
>
> (on aarch64 the builtins expand to single instruction with
> -fno-math-errno, but on s390x they remain libc calls
Both the functions and builtins are converted to single instructions
for me. What architecture level is your GCC assuming?
> at some point we plan to have some internal header to turn
> math/string calls into builtins when compiling musl with gcc)
I have a patch set ready for powerpc64 teed up after this patch.
Thanks, David
next prev parent reply other threads:[~2017-06-10 17:25 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-09 14:51 David Edelsohn
2017-06-10 15:36 ` Szabolcs Nagy
2017-06-10 17:25 ` David Edelsohn [this message]
2017-06-10 18:29 ` Szabolcs Nagy
2017-06-10 18:53 ` David Edelsohn
2017-06-10 19:48 ` Rich Felker
2017-06-10 20:22 ` David Edelsohn
2017-06-10 21:28 ` Szabolcs Nagy
2017-06-10 21:44 ` David Edelsohn
2017-06-10 21:48 ` David Edelsohn
2017-06-11 2:20 ` Rich Felker
2017-06-11 10:19 ` Szabolcs Nagy
2017-06-11 15:04 ` Rich Felker
2017-06-11 16:45 ` Szabolcs Nagy
2017-06-11 21:45 ` Rich Felker
2017-06-12 2:46 ` David Edelsohn
2017-06-12 4:36 ` Tuan M. Hoang
2017-06-12 9:03 ` Szabolcs Nagy
2017-06-12 13:28 ` David Edelsohn
2017-06-12 13:54 ` David Edelsohn
2017-06-12 20:28 ` Szabolcs Nagy
2017-06-12 21:02 ` David Edelsohn
2017-06-13 15:55 ` Szabolcs Nagy
2017-06-14 23:34 ` Rich Felker
2017-06-14 23:40 ` A. Wilcox
2017-06-14 23:44 ` Rich Felker
2017-06-15 12:18 ` David Edelsohn
2017-06-18 17:12 ` David Edelsohn
2017-06-21 0:49 ` Rich Felker
2017-06-21 1:07 ` David Edelsohn
2017-06-21 1:20 ` Rich Felker
2017-06-21 3:34 ` David Edelsohn
2017-06-23 19:31 ` Rich Felker
2017-06-10 21:37 ` Rich Felker
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