From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
To: Stefan Kanthak <stefan.kanthak@nexgo.de>, libc-help@sourceware.org
Subject: Re: Twiddling with 64-bit values as 2 ints;
Date: Mon, 23 Aug 2021 09:23:44 -0300 [thread overview]
Message-ID: <4c8ee26d-764e-736f-c3d6-5728e54c4c0f@linaro.org> (raw)
In-Reply-To: <4DD65B114A174A35AC6960DD2104BDE7@H270>
On 21/08/2021 10:34, Stefan Kanthak wrote:
>
> (Heretic.-) questions:
> - why does glibc still employ such ugly code?
> - Why doesn't glibc take advantage of 64-bit integers in such code?
Because no one cared to adjust the implementation. Recently Wilco
has removed a lot of old code that still uses 32-bit instead of 64-bit
bo bit twinddling in floating-pointer implementation (check caa884dda7
and 9e97f239eae1f2).
I think we should move to use a simplest code assuming 64-bit CPU
and let the compiler optimize it (which unfortunately gcc is not that
smart in all the cases).
next prev parent reply other threads:[~2021-08-23 12:23 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-21 13:34 Stefan Kanthak
2021-08-23 12:23 ` Adhemerval Zanella [this message]
2021-08-23 13:18 ` Stefan Kanthak
2021-08-23 14:11 ` Adhemerval Zanella
2021-08-23 15:37 ` Stefan Kanthak
2021-08-23 16:51 ` Adhemerval Zanella
2021-08-23 17:32 ` Stefan Kanthak
2021-08-23 18:24 ` Adhemerval Zanella
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