From: Georg Bauhaus <rm.dash-bauhaus@futureapps.de>
Subject: Re: 64 bit codes
Date: Wed, 28 Sep 2011 11:53:22 +0200
Date: 2011-09-28T11:53:22+02:00 [thread overview]
Message-ID: <4e82ee92$0$6573$9b4e6d93@newsspool3.arcor-online.net> (raw)
In-Reply-To: <CAA7AF1E.5E15%yaldnif.w@blueyonder.co.uk>
On 27.09.11 17:49, Bill Findlay wrote:
> So, while your caveats are of course valid, there certainly are workloads
> that benefit greatly from working in 64 bits.
IBM confirms:
"64 bit register use in 32 bit applications: GCC will exploit the
availability of 64 bit registers in 32 bit applications when compiling
with -m31 -mzarch. This provides a significant performance gain for 32
bit applications built this way. The versions of the Linux Kernel,
GNU Binutils, GNU C Library and GDB as documented here provide the
support required by this GCC feature."
http://www.ibm.com/developerworks/linux/linux390/toolchain.html
I hadn't known that there are 31-bit systems and correspondingly,
a -m31 switch for GCC. Wow.
next prev parent reply other threads:[~2011-09-28 9:53 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-27 6:59 64 bit codes Mok-Kong Shen
2011-09-27 7:48 ` Georg Bauhaus
2011-09-27 9:04 ` Mok-Kong Shen
2011-09-27 9:14 ` Ludovic Brenta
2011-09-27 9:54 ` Mok-Kong Shen
2011-09-27 10:08 ` Ludovic Brenta
2011-09-27 11:21 ` Mok-Kong Shen
2011-09-27 13:09 ` Ludovic Brenta
2011-09-27 13:25 ` Georg Bauhaus
2011-09-27 13:51 ` Mok-Kong Shen
2011-09-27 14:15 ` Mok-Kong Shen
2011-09-27 14:40 ` Ludovic Brenta
2011-09-27 13:48 ` Mok-Kong Shen
2011-09-27 14:50 ` Ludovic Brenta
2011-09-27 15:49 ` Bill Findlay
2011-09-28 9:53 ` Georg Bauhaus [this message]
2011-09-28 10:36 ` Ludovic Brenta
2011-09-28 0:38 ` Rugxulo
2011-09-29 17:08 ` Rugxulo
2011-09-29 19:20 ` Pascal Obry
2011-09-29 19:26 ` Ludovic Brenta
2011-09-29 19:35 ` Pascal Obry
2011-09-29 19:38 ` Pascal Obry
2011-10-06 2:48 ` mjamesb
2011-09-27 15:39 ` Simon Wright
2011-09-27 19:13 ` Simon Wright
2011-09-28 7:16 ` Georg Bauhaus
2011-09-28 12:26 ` Fritz Wuehler
2011-09-28 13:41 ` Yannick Duchêne (Hibou57)
2011-09-28 14:28 ` Georg Bauhaus
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