[parisc-linux] Progress

[Philipp Rumpf]

> My timing tests on a 735 indicate that the loop with two addib instructions
> is only 25% faster than a loop with one addib and one nop.

Who cares about how fast the loop is, actually ?

> You are correct that there are only two actual instructions in the loop.
> However, the timing measurements indicate that the two addib loop stalls
> for one instruction time.  Thus, effectively there is an extra nop in your
> loop.

> As a result, my comments re the BogoMIPS calculation below are correct for
> a 735 PA7100.  I think the stall is on the second addib when the forward
> branch is not taken.

Forward branches should be predicted not taken.

	Philipp Rumpf