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Annotation of 43BSDTahoe/man/man3f/bit.3, revision 1.1

1.1     ! root        1: .\" Copyright (c) 1983 Regents of the University of California.
        !             2: .\" All rights reserved.  The Berkeley software License Agreement
        !             3: .\" specifies the terms and conditions for redistribution.
        !             4: .\"
        !             5: .\"    @(#)bit.3f      6.4 (Berkeley) 4/30/86
        !             6: .\"
        !             7: .TH BIT 3F "April 30, 1986"
        !             8: .UC 5
        !             9: .SH NAME
        !            10: bit \- and, or, xor, not, rshift, lshift bitwise functions
        !            11: .SH SYNOPSIS
        !            12: .B (intrinsic) function and (word1, word2)
        !            13: .sp 1
        !            14: .B (intrinsic) function or (word1, word2)
        !            15: .sp 1
        !            16: .B (intrinsic) function xor (word1, word2)
        !            17: .sp 1
        !            18: .B (intrinsic) function not (word)
        !            19: .sp 1
        !            20: .B (intrinsic) function rshift (word, nbits)
        !            21: .sp 1
        !            22: .B (intrinsic) function lshift (word, nbits)
        !            23: .SH DESCRIPTION
        !            24: These bitwise functions are built into the compiler and return
        !            25: the data type of their argument(s).
        !            26: Their arguments must be
        !            27: .B integer
        !            28: or
        !            29: .B logical
        !            30: values.
        !            31: .PP
        !            32: The bitwise combinatorial functions return the
        !            33: bitwise ``and'' (\fBand\fR), ``or'' (\fBor\fR), or ``exclusive or'' (\fBxor\fR)
        !            34: of two operands.
        !            35: .B Not
        !            36: returns the bitwise complement of its operand.
        !            37: .PP
        !            38: .IR Lshift ,
        !            39: or
        !            40: .I rshift
        !            41: with a negative
        !            42: .IR nbits ,
        !            43: is a logical left shift with no end around carry.
        !            44: .IR Rshift ,
        !            45: or
        !            46: .I lshift
        !            47: with a negative
        !            48: .IR nbits ,
        !            49: is an arithmetic right shift with sign extension.
        !            50: No test is made for a reasonable value of
        !            51: .I nbits.
        !            52: .PP
        !            53: These functions may be used to create a variety of general routines, as in
        !            54: the following statement function definitions:
        !            55: .sp 1
        !            56: .B     integer bitset, bitclr, getbit, word, bitnum
        !            57: .sp 1
        !            58: .B     bitset( word, bitnum ) = or(word,lshift(1,bitnum))
        !            59: .br
        !            60: .B     bitclr( word, bitnum ) = and(word,not(lshift(1,bitnum)))
        !            61: .br
        !            62: .B     getbit( word, bitnum ) = and(rshift(word,bitnum),1)
        !            63: .SH FILES
        !            64: These functions are generated in-line by the f77 compiler.

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