__cntlz 52 include/asm-xtensa/bitops.h return 31 - __cntlz(~x & -~x); __cntlz 61 include/asm-xtensa/bitops.h return 31 - __cntlz(x & -x); __cntlz 72 include/asm-xtensa/bitops.h return 32 - __cntlz(x & -x); __cntlz 82 include/asm-xtensa/bitops.h return 32 - __cntlz(x);