| To: | linux-mips@linux-mips.org |
|---|---|
| Subject: | Re: your mail |
| From: | Greg Lindahl <lindahl@keyresearch.com> |
| Date: | Thu, 17 Apr 2003 13:15:03 -0700 |
| In-reply-to: | <20030417111710.F1642@mvista.com> |
| Mail-followup-to: | linux-mips@linux-mips.org |
| Original-recipient: | rfc822;linux-mips@linux-mips.org |
| References: | <56BEF0DBC8B9D611BFDB00508B5E2634102F10@TLEXMAIL> <20030417111710.F1642@mvista.com> |
| Sender: | linux-mips-bounce@linux-mips.org |
| User-agent: | Mutt/1.4.1i |
On Thu, Apr 17, 2003 at 11:17:10AM -0700, Jun Sun wrote: > It really depends on the applications. The biggest gain from 64bit, > other than the obviously bigger address space, is 64bit data > manipulation. A single 64bit instruction (add/sub/...) is carried > out by several instructions in 32bit. A big gain is the increased # of registers and better calling sequence. Everyone sees that, not just people who want to use 64-bit integers. At the moment you need to run the 64-bit kernel -- and the new binutils & glibc -- in order to get n32 programs to work. -- greg |
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