bit(3F)

Name

bit - and, or, xor, not, rshift, lshift, bic, bis, bit, setbit functions

Synopsis

(generic) function and (word1, word2)

(generic) function or (word1, word2)

(generic) function xor (word1, word2)

(generic) function not (word)

(generic) function rshift (word, nbits)

(generic) function lshift (word, nbits)

subroutine bic (bitnum, word)
integer*4 bitnum, word

subroutine bis (bitnum, word)
integer*4 bitnum, word

subroutine setbit (bitnum, word, state)
integer*4 bitnum, word, state

logical function bit (bitnum, word)
integer*4 bitnum, word

Description

The and, or, xor, not, rshift, and lshift functions are generic functions expanded inline by the compiler. Their arguments must be integer or logical values, short or long. The returned value has the data type of the first argument.

Bits are numbered such that bit 0 is the least significant bit, and bit 31 is the most significant. This routine works for all Oracle Developer Studio supported architectures, even though some number bytes differently.

and

Computes the bitwise `and' of its arguments.

or

Computes the bitwise `or' of its arguments.

xor

Computes the bitwise `exclusive or' of its arguments.

not

Returns the bitwise complement of its argument.

lshift

Is a logical left shift with no end around carry.

rshift

Is an arithmetic right shift with sign extension. No test is made for a reasonable value of nbits.

bic, bis, and setbit are external subroutines which operate on INTEGER*4 arguments.

bis

Sets bitnum in word.

bic

Clears bitnum in word.

setbit

Sets bitnum in word to 1 if state is nonzero, and clears it otherwise.

bit

Is an external function which tests bitnum in word. It returns .true. if bitnum is a 1 (one), and returns .false. if bitnum is a 0 (zero).

Files

libfsu.a