4 Commits

Author	SHA1	Message	Date
H. Peter Anvin	c138e6a4b2	ilog2: optimize use of bsr for x86-64 ... On x86-64 platforms, we can rely on BSR not changing the destination operand when the input is zero. Signed-off-by: H. Peter Anvin <hpa@zytor.com>	2010-04-22 11:02:56 -07:00
Cyrill Gorcunov	641ca7fd6a	ilog2: Use ROUND helper ... Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>	2010-04-22 19:03:39 +04:00
Cyrill Gorcunov	c8fd6fdae4	ilog2: Get rid of tabs ... Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>	2010-04-22 19:02:35 +04:00
H. Peter Anvin	084b13227e	Add generic ilog2 functions ... Add ilog2_{32,64}() and alignlog2_{32,64}() ... the latter is intended for alignment statements and return -1 for non-power-of-2 other than 0 (which returns 0). Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>	2010-04-21 16:43:20 -07:00