On Tue, Jun 30, 2009 at 3:08 AM, Jeremy Kerrj...@ozlabs.org wrote:
Move the shift-and-test login into a separate fls() function, which
can use __builtin_clz() if it's available.
This requires a new check for __builtin_clz in the configure script.
Results in a ~2% performance increase on
Robert Haas wrote:
On Tue, Jun 30, 2009 at 3:08 AM, Jeremy Kerrj...@ozlabs.org wrote:
Move the shift-and-test login into a separate fls() function, which
can use __builtin_clz() if it's available.
This requires a new check for __builtin_clz in the configure script.
Results in a ~2%
Hi Robert,
That having been said, Jeremy, you probably want to take a look at
those comments and I have a few responses to them as well.
OK, thanks for the heads-up.
following comment:
Applied and built cleanly. Regress passes. Trying to hunt down ppc
box to see if performance
Jeremy Kerr j...@ozlabs.org writes:
- inline is forbidden to use in PostgreSQL - you need exception or
do it differently
(inline again: should I just make this a static, the compiler can inline
where possible? or do you want a macro?)
I don't know where Zdenek got the idea that we have
Move the shift-and-test login into a separate fls() function, which
can use __builtin_clz() if it's available.
This requires a new check for __builtin_clz in the configure script.
Results in a ~2% performance increase on PowerPC.
Signed-off-by: Jeremy Kerr j...@ozlabs.org
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v3: respin as
