[PATCH] T3/T4 sparc shifts, plus more timings

[Torbjorn Granlund]

David Miller <davem at davemloft.net> writes:

  I'd suggest checking this code in at this point.

I decided to leave lshift, rshift, and lshiftc all separate for now.
But I whacked the post loop code somewhat more.

The lshiftc code runs at 3 c/l on US3, not the claimed 2.5 c/l.  I
suspect also the US1 claim if 2 c/l is invalid.

It is not hard to see why it is 3 c/l.  I haven't tried swapping things
around to fix this, since that would risk hurting the T3/T4 performance.

Perhaps you could look into that?

My current versions of the files are attached. 

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Torbj?rn