RTEMS 4.8.0 On-Line Library

ARM Specific Information Count Leading Zeroes Instruction

RTEMS CPU Architecture Supplement

1.1.2: Count Leading Zeroes Instruction

The ARMv5 and later has the count leading zeroes (clz) instruction which could be used to speed up the find first bit operation. The use of this instruction should significantly speed up the scheduling associated with a thread blocking.

RTEMS CPU Architecture Supplement