BITDEL64(9F) Kernel Functions for Drivers BITDEL64(9F)
NAME
bitdel64 - delete bits from an integer
SYNOPSIS
#include <sys/bitext.h> uint64_t bitdel64(
uint64_t value,
uint_t high,
uint_t low);
INTERFACE LEVEL
Volatile - This interface is still evolving in illumos. API and ABI
stability is not guaranteed.
PARAMETERS
value high The high end, inclusive, of the bit range to delete from
value.
low The low end, inclusive, of the bit range to delete from
value.
value An integer to remove bits from.
DESCRIPTION
The
bitdel64() function removes bits from an integer,
value. The act
of removing a bit range not only removes all the bits in the range
specified by
low and
high, but also causes all remaining bits to be
shifted over to start at
low.
For example, consider the binary value 0b11_1101_0011 (0x3d3). If we
deleted bits 4 through 7, the resulting value would be 0b11_0011
(0x33).
high and
low are an inclusive range ([
low,
high]) and the value of
low cannot be greater than
high or 63.
RETURN VALUES
Upon successful completion, the
bitdel64() returns the modified integer
with the appropriate bits removed.
SEE ALSO
bitset64(9F),
bitx64(9F)illumos April 12, 2022 illumos
