| commit | 06fbefd10046a0fae7e588b7c6d25fb51811b931 | [log] [tgz] |
|---|---|---|
| author | Szabolcs Nagy <nsz@port70.net> | Tue Apr 18 22:20:54 2017 |
| committer | Rich Felker <dalias@aerifal.cx> | Wed Aug 30 01:47:10 2017 |
| tree | 032c4ece67f6217ceb354ebff4c9889f2f0133eb | |
| parent | 3356177979bea717451362e746252ed38de77514 [diff] |
add a_clz_64 helper function counts leading zero bits of a 64bit int, undefined on zero input. (has nothing to do with atomics, added to atomic.h so target specific helper functions are together.) there is a logarithmic generic implementation and another in terms of a 32bit a_clz_32 on targets where that's available.