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Manual Pages  — Q_IRAWMASK

NAME

Q_IRAWMASK, Q_GIRAW, Q_GIABSVAL, Q_GIVAL, Q_SIVAL – fixed-point math functions which manipulate the integer data bits

CONTENTS

SYNOPSIS

#include <sys/qmath.h>

ITYPE
Q_IRAWMASK(QTYPE q);

ITYPE
Q_GIRAW(QTYPE q);

ITYPE
Q_GIABSVAL(QTYPE q);

ITYPE
Q_GIVAL(QTYPE q);

QTYPE
Q_SIVAL(QTYPE q, ITYPE iv);

DESCRIPTION

Q_IRAWMASK() returns a q, Ns, -specific bit mask for q, Ap, s integer data bits.

Q_GIRAW() returns q, Ap, s raw masked integer data bits.

Q_GIABSVAL() and Q_GIVAL() return the absolute and real values of q, Ap, s integer data bits respectively.

Q_SIVAL() sets q, Ap, s integer data bits to the value iv.

All of those functions operate on the following data types: s8q_t, u8q_t, s16q_t, u16q_t, s32q_t, u32q_t, s64q_t, and u64q_t, which are referred to generically as QTYPE. The ITYPE refers to the stdint(7) integer types.

For more details, see qmath(3).

RETURN VALUES

Q_IRAWMASK(), Q_GIRAW(), Q_GIABSVAL() and Q_GIVAL() return their respective values as integers of the same underlying ITYPE as q.

Q_SIVAL() returns the value of q post change.

SEE ALSO

errno(2), qmath(3), stdint(7)

HISTORY

The qmath(3) functions first appeared in FreeBSD 13.0 .

AUTHORS

The qmath(3) functions and this manual page were written by Lawrence Stewart <Mt lstewart@FreeBSD.org> and sponsored by Netflix, Inc.
Q_IRAWMASK (3) July 8, 2018
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