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.\" $FreeBSD$ | |||||
.\" | |||||
.Dd July 8, 2018 | |||||
.Dt Q_QABS 3 | |||||
.Os | |||||
.Sh NAME | |||||
.Nm Q_QABS , | |||||
.Nm Q_Q2S , | |||||
.Nm Q_Q2F | |||||
.Nd fixed-point math functions which operate on a single Q number | |||||
.Sh SYNOPSIS | |||||
.In sys/qmath.h | |||||
.Ft QTYPE | |||||
.Fn Q_QABS "QTYPE q" | |||||
.Ft double | |||||
.Fn Q_Q2D "QTYPE q" | |||||
.Ft float | |||||
.Fn Q_Q2F "QTYPE q" | |||||
.Sh DESCRIPTION | |||||
The | |||||
.Fn Q_QABS | |||||
function returns an absolute value representation of | |||||
.Fa q . | |||||
.Pp | |||||
The | |||||
.Fn Q_Q2D | |||||
and | |||||
.Fn Q_Q2F | |||||
functions return the double and float representations of | |||||
.Fa q | |||||
respectively. | |||||
.Pp | |||||
All of those functions operate on | |||||
the following data types: | |||||
.Vt s8q_t , | |||||
.Vt u8q_t , | |||||
.Vt s16q_t , | |||||
.Vt u16q_t , | |||||
.Vt s32q_t , | |||||
.Vt u32q_t , | |||||
.Vt s64q_t , | |||||
and | |||||
.Vt u64q_t , | |||||
which are referred to generically as | |||||
.Fa QTYPE . | |||||
.Pp | |||||
For more details, see | |||||
.Xr qmath 3 . | |||||
.Sh RETURN VALUES | |||||
.Fn Q_QABS | |||||
function returns a QTYPE that is identical to that of | |||||
.Fa q . | |||||
.Pp | |||||
The | |||||
.Fn Q_Q2D | |||||
and | |||||
.Fn Q_Q2F | |||||
functions return the double and float representations of | |||||
.Fa q | |||||
respectively. | |||||
.Sh SEE ALSO | |||||
.Xr errno 2 , | |||||
.Xr qmath 3 , | |||||
.Xr stdint 7 | |||||
.Sh HISTORY | |||||
The | |||||
.Xr qmath 3 | |||||
functions first appeared in | |||||
.Fx 13.0 . | |||||
.Sh AUTHORS | |||||
.An -nosplit | |||||
The | |||||
.Xr qmath 3 | |||||
functions and this manual page were written by | |||||
.An Lawrence Stewart Aq Mt lstewart@FreeBSD.org | |||||
and sponsored by Netflix, Inc. |