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From: "deller at gmx dot de" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sources.redhat.com
Subject: [Bug libc/6730] New: [PARISC] small atomic.h optimization
Date: Tue, 08 Jul 2008 16:32:00 -0000	[thread overview]
Message-ID: <20080708163141.6730.deller@gmx.de> (raw)

In the file ports/sysdeps/unix/sysv/linux/hppa/bits/atomic.h a LWS call is 
done, and then the kernel return value is negated (from - to +) with this 
line:
 sub   %%r0, %%r21, %%r21  
A small optimization is to drop this negation and instead change
 if(lws_errno == EFAULT || lws_errno == ENOSYS)
to 
 if(lws_errno == -EFAULT || lws_errno == -ENOSYS)

-- 
           Summary: [PARISC] small atomic.h optimization
           Product: glibc
           Version: 2.4
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: libc
        AssignedTo: carlos at systemhalted dot org
        ReportedBy: deller at gmx dot de
                CC: glibc-bugs at sources dot redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=6730

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             reply	other threads:[~2008-07-08 16:32 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-07-08 16:32 deller at gmx dot de [this message]
2008-07-08 16:35 ` [Bug ports/6730] " drepper at redhat dot com
2008-07-08 16:35 ` carlos at systemhalted dot org
2009-11-08 17:06 ` carlos at systemhalted dot org
2009-11-12 14:13 ` carlos at systemhalted dot org

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