1.\" 2.\" Copyright (c) 2018 Netflix, Inc. 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions, and the following disclaimer, 10.\" without modification, immediately at the beginning of the file. 11.\" 2. The name of the author may not be used to endorse or promote products 12.\" derived from this software without specific prior written permission. 13.\" 14.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 18.\" ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" 26.Dd July 8, 2018 27.Dt Q_QABS 3 28.Os 29.Sh NAME 30.Nm Q_QABS , 31.Nm Q_Q2S , 32.Nm Q_Q2F 33.Nd fixed-point math functions which operate on a single Q number 34.Sh SYNOPSIS 35.In sys/qmath.h 36.Ft QTYPE 37.Fn Q_QABS "QTYPE q" 38.Ft double 39.Fn Q_Q2D "QTYPE q" 40.Ft float 41.Fn Q_Q2F "QTYPE q" 42.Sh DESCRIPTION 43The 44.Fn Q_QABS 45function returns an absolute value representation of 46.Fa q . 47.Pp 48The 49.Fn Q_Q2D 50and 51.Fn Q_Q2F 52functions return the double and float representations of 53.Fa q 54respectively. 55.Pp 56All of those functions operate on 57the following data types: 58.Vt s8q_t , 59.Vt u8q_t , 60.Vt s16q_t , 61.Vt u16q_t , 62.Vt s32q_t , 63.Vt u32q_t , 64.Vt s64q_t , 65and 66.Vt u64q_t , 67which are referred to generically as 68.Fa QTYPE . 69.Pp 70For more details, see 71.Xr qmath 3 . 72.Sh RETURN VALUES 73.Fn Q_QABS 74function returns a QTYPE that is identical to that of 75.Fa q . 76.Pp 77The 78.Fn Q_Q2D 79and 80.Fn Q_Q2F 81functions return the double and float representations of 82.Fa q 83respectively. 84.Sh SEE ALSO 85.Xr errno 2 , 86.Xr qmath 3 , 87.Xr stdint 7 88.Sh HISTORY 89The 90.Xr qmath 3 91functions first appeared in 92.Fx 13.0 . 93.Sh AUTHORS 94.An -nosplit 95The 96.Xr qmath 3 97functions and this manual page were written by 98.An Lawrence Stewart Aq Mt lstewart@FreeBSD.org 99and sponsored by Netflix, Inc. 100