http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49547
H.J. Lu <hjl.tools at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2011.06.27 16:10:24 Target Milestone|--- |4.6.2 Ever Confirmed|0 |1 --- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> 2011-06-27 16:10:24 UTC --- Assembler takes lzcnt only if ABM or LCNT is enabled. It has nothing to do with BMI. AMD spec is incorrect.