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NAMEQ_QADDI , Q_QDIVI ,
Q_QMULI , Q_QSUBI ,
Q_QFRACI , Q_QCPYVALI —
fixed-point math functions which apply integers to a Q
number
SYNOPSIS#include <sys/qmath.h>
int
int
int
int
int
int
DESCRIPTIONTheQ_QADDI (), Q_QDIVI (),
Q_QMULI () and Q_QSUBI ()
functions add, divide, multiply or subtract b to/by/from
a respectively, storing the result in
a.
The The 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 VALUESQ_QADDI (), Q_QDIVI (),
Q_QMULI (), Q_QSUBI (),
Q_QFRACI () and Q_QCPYVALI ()
functions return 0 on success, or an errno on failure.
EINVAL is returned for divide-by-zero.
EOVERFLOW and ERANGE are
returned for overflow and underflow respectively.
SEE ALSOerrno(2), qmath(3), stdint(7)HISTORYThe qmath(3) functions first appeared in FreeBSD 13.0.AUTHORSThe qmath(3) functions and this manual page were written by Lawrence Stewart <lstewart@FreeBSD.org> and sponsored by Netflix, Inc.
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