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llvm-svn: 30399
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Chris Lattner 2006-09-15 20:31:36 +00:00
parent 1bcb3d16cc
commit c9dc375d3e
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6
llvm/lib/Target/README.txt
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@ -240,4 +240,10 @@ _bar: addic r3,r3,-1
subfe r3,r3,r3 subfe r3,r3,r3
blr blr
//===---------------------------------------------------------------------===//
Legalize should lower ctlz like this:
ctlz(x) = popcnt((x-1) & ~x)
on targets that have popcnt but not ctlz. itanium, what else?