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Manual Pages  — Q_QABS

NAME

Q_QABS, Q_Q2S, Q_Q2F – fixed-point math functions which operate on a single Q number

CONTENTS

SYNOPSIS

#include <sys/qmath.h>

QTYPE
Q_QABS(QTYPE q);

double
Q_Q2D(QTYPE q);

float
Q_Q2F(QTYPE q);

DESCRIPTION

The Q_QABS() function returns an absolute value representation of q.

The Q_Q2D() and Q_Q2F() functions return the double and float representations of q respectively.

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.

For more details, see qmath(3).

RETURN VALUES

Q_QABS() function returns a QTYPE that is identical to that of q.

The Q_Q2D() and Q_Q2F() functions return the double and float representations of q respectively.

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_QABS (3) July 8, 2018
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