[haiku-bugs] Re: [Haiku] #3281: ffs() arch optimization
- From: "tqh" <trac@xxxxxxxxxxxx>
- Date: Tue, 30 Mar 2010 19:46:18 -0000
#3281: ffs() arch optimization
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Reporter: tqh | Owner: tqh
Type: enhancement | Status: new
Priority: low | Milestone: R1
Component: System/libroot.so | Version:
Keywords: | Blockedby:
Platform: All | Blocking:
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Comment(by tqh):
For gcc 4 __builtin_ffs is always at least twice as fast. It should
probably be ok on gcc2.95 as well. Should we just change the header to
#define ffs(x) __builtin_ffs(x) ?[[BR]]
Since we use gcc on other archs it should work there as well.
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Ticket URL: <http://dev.haiku-os.org/ticket/3281#comment:10>
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