donn@utah-cs.UUCP (Donn Seeley) (09/18/84)
Actually the bug is undoubtedly in the documentation... Under the manual section 'bstring' we read: A return value of -1 indicates that the value passed is zero. But a look at the source (and the kernel asm.sed) shows that 0 is returned for zero. I assume that the code is right and the manual page is wrong. Although my knowledge of Sun assembler is close to zip, it would appear that the same inconsistency exists in the Sun 1.1 distribution. Unless ffs() returns 0 for zero, you lose the only good reason to number the bits from 1 instead of from 0... (Growl.) Donn Seeley University of Utah CS Dept donn@utah-cs.arpa 40 46' 6"N 111 50' 34"W (801) 581-5668 decvax!utah-cs!donn
gnu@sun.uucp (John Gilmore) (09/19/84)
Donn is right; both in the Vax and Sun libc routines, the result is 0 if the argument is 0. Unless something is terribly wrong, the documentation is terribly wrong.