xref: /freebsd/share/man/man3/Q_QABS.3 (revision 59c8e88e72633afbc47a4ace0d2170d00d51f7dc)
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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