On Wed, 25 Mar 2015, Mateusz Guzik wrote:
On Tue, Mar 24, 2015 at 03:58:14PM +1100, Bruce Evans wrote:
On Tue, 24 Mar 2015, Mateusz Guzik wrote:
Log:
filedesc: microoptimize fget_unlocked by getting rid of fd < 0 branch
This has no effect. Compilers optimize to the equivalent of the the
un
On Tue, Mar 24, 2015 at 03:58:14PM +1100, Bruce Evans wrote:
> On Tue, 24 Mar 2015, Mateusz Guzik wrote:
>
> >Log:
> > filedesc: microoptimize fget_unlocked by getting rid of fd < 0 branch
>
> This has no effect. Compilers optimize to the equivalent of the the
> unsigned cast hack if this is goo
On Tue, 24 Mar 2015, Mateusz Guzik wrote:
Log:
filedesc: microoptimize fget_unlocked by getting rid of fd < 0 branch
This has no effect. Compilers optimize to the equivalent of the the
unsigned cast hack if this is good. On x86, it is good since no
instructions are needed for the conversion
Author: mjg
Date: Tue Mar 24 00:10:11 2015
New Revision: 280407
URL: https://svnweb.freebsd.org/changeset/base/280407
Log:
filedesc: microoptimize fget_unlocked by getting rid of fd < 0 branch
Casting fd to an unsigned type simplifies fd range coparison to mere checking
if the result is b
