2.11BSD#431 - /usr/man/cat3f/or.0

BIT(3F)             UNIX Programmer's Manual		  BIT(3F)


NAME
     bit - and, or, xor, not, rshift, lshift bitwise functions

SYNOPSIS
     (intrinsic) function and (word1, word2)

     (intrinsic) function or (word1, word2)

     (intrinsic) function xor (word1, word2)

     (intrinsic) function not (word)

     (intrinsic) function rshift (word, nbits)

     (intrinsic) function lshift (word, nbits)

DESCRIPTION
     These bitwise functions are built into the compiler and
     return the data type of their argument(s).  Their arguments
     must be integer or logical values.

     The bitwise combinatorial functions return the bitwise
     ``and'' (and), ``or'' (or), or ``exclusive or'' (xor) of two
     operands.	Not returns the bitwise complement of its
     operand.

     Lshift, or rshift with a negative nbits, is a logical left
     shift with no end around carry.  Rshift, or lshift with a
     negative nbits, is an arithmetic right shift with sign
     extension.  No test is made for a reasonable value of nbits.

     These functions may be used to create a variety of general
     routines, as in the following statement function defini-
     tions:

	integer bitset, bitclr, getbit, word, bitnum

	bitset( word, bitnum ) = or(word,lshift(1,bitnum))
	bitclr( word, bitnum ) = and(word,not(lshift(1,bitnum)))
	getbit( word, bitnum ) = and(rshift(word,bitnum),1)

FILES
     These functions are generated in-line by the f77 compiler.


Printed 11/26/99	 April 30, 1986                         1