id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	os	architecture	failure	difficulty	testcase	blockedby	blocking	related
4102	Bit manipulation built-ins	uzytkownik		"So far Haskell/GHC lacks more HL bit manipulation instructions which on many platform can be compiled to single instruction. Probably the good guide are those implemented in LLVM:

 - byte swap
 - population count
 - number of leading zeros
 - number of trailing zeros

All of them can be implemented in terms of Data.Bits - however not quite in efficient way (like looping over patterns)."	feature request	new	normal	7.6.2	libraries/base	6.12.2			josefs@… gabriel@… dterei rrnewton@… wren@… johan.tibell@…	Unknown/Multiple	Unknown/Multiple	None/Unknown