http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59968
H.J. Lu <hjl.tools at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Attachment #31974|0 |1 is obsolete| | --- Comment #18 from H.J. Lu <hjl.tools at gmail dot com> --- Created attachment 31983 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31983&action=edit Micro-benchmark for bt, btr, bts These micro-benchmark for bt, btr, bts show that BTx with register operand is 8 to 30% faster on Sandy Bride, Ivy Bridge, Haswell and Silvermont.