1BIT(3F)                                                                BIT(3F)
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NAME

6       bit - and, or, xor, not, rshift, lshift bitwise functions
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SYNOPSIS

9       (intrinsic) function and (word1, word2)
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11       (intrinsic) function or (word1, word2)
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13       (intrinsic) function xor (word1, word2)
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15       (intrinsic) function not (word)
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17       (intrinsic) function rshift (word, nbits)
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19       (intrinsic) function lshift (word, nbits)
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DESCRIPTION

22       These bitwise functions are built into the compiler and return the data
23       type of their argument(s).  Their arguments must be integer or  logical
24       values.
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26       The  bitwise  combinatorial functions return the bitwise ``and'' (and),
27       ``or'' (or), or ``exclusive or'' (xor) of two  operands.   Not  returns
28       the bitwise complement of its operand.
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30       Lshift,  or  rshift with a negative nbits, is a logical left shift with
31       no end around carry.  Rshift, or lshift with a negative  nbits,  is  an
32       arithmetic right shift with sign extension.  No test is made for a rea‐
33       sonable value of nbits.
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35       These functions may be used to create a variety of general routines, as
36       in the following statement function definitions:
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38       integer bitset, bitclr, getbit, word, bitnum
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40       bitset( word, bitnum ) = or(word,lshift(1,bitnum))
41       bitclr( word, bitnum ) = and(word,not(lshift(1,bitnum)))
42       getbit( word, bitnum ) = and(rshift(word,bitnum),1)
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FILES

45       These functions are generated in-line by the f77 compiler.
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494.2 Berkeley Distribution       April 30, 1986                         BIT(3F)
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