Messages in this thread | | | From | Denis Vlasenko <> | Subject | Re: [rc4-amd64] RC4 optimized for AMD64 | Date | Tue, 2 Nov 2004 23:45:38 +0200 |
| |
On Tuesday 02 November 2004 20:52, dean gaudet wrote: > On Tue, 2 Nov 2004, Denis Vlasenko wrote: > > > On Monday 01 November 2004 22:44, dean gaudet wrote: > > > note that > > > p4 would prefer "sub $1, %r11b" here instead of dec... but the difference > > > is likely minimal. > > > > p4 is not the only x86 CPU on the planet. Why should I use > > longer instruction then? > > you're asking about spending one byte? one byte extra for code which > could perform better on more CPUs?
You're asking about speedup by 1 cycle on a CPU which will be outdated 6 months from now? -- vda
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |