Re: i387/FPU init issues...

[James Courtier-Dutton]

H. Peter Anvin wrote:
> Thomas Gleixner wrote:
> > Jan, are you sure that P3 knows the P6 NOPs ? AFAICT its P4, but I
> > have to dig up the manuals.
>
> Pentium III is the P6 core, so it will.
>
> Intel explicitly documents "all processors with family 6 or F."
>
> -hpa

From the intel manual

0F 1F /0 NOP
The multi-byte form of NOP is available on processors with model encoding:
• CPUID.01H.EAX[Bytes 11:8] = 0110B or 1111B
The multi-byte NOP instruction does not alter the content of a register 
and will not
issue a memory operation. The instruction’s operation is the same in 
non-64-bit
modes and 64-bit mode.


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/