Linked by Thom Holwerda on Sat 3rd Jun 2006 16:12 UTC, submitted by anonymous
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>Which is partly to compensate for the fact that the >CPU itself doesn 't have enough GPRs.
Modern x86 CPUs use more than eight/sixteen GPR internally, that allows them to use several versions of the same GPR. This is called register renaming.
Specfic for K8...
Not visible for the software programmer are eight more 64 bit scratch registers used to store intermediate results for micro code routines.
According to chip-architect.com, Opteron may have upto 96 "renamed registers".





Member since:
2005-11-16
>the PowerPC 970MP is arguably a more capable >processor than the Opteron
Depends on the application e.g. Cinebench X64 vs Cinebench MacOS X.
>gives you twice as many GPRs
Opteron delivers larger L1 cache.
>consumes less power,
One shouldn’t compare IBM’s "Typical" TDP to AMD’s max power TDP. Also factor in "Opteron HE".