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Q_FRAWMASK(3) BSD Library Functions Manual Q_FRAWMASK(3) NAME Q_FRAWMASK, Q_GFRAW, Q_GFABSVAL, Q_GFVAL, Q_SFVAL -- fixed-point math functions which manipulate the fractional data bits SYNOPSIS #include <sys/qmath.h> ITYPE Q_FRAWMASK(QTYPE q); ITYPE Q_GFRAW(QTYPE q); ITYPE Q_GFABSVAL(QTYPE q); ITYPE Q_GFVAL(QTYPE q); QTYPE Q_SFVAL(QTYPE q, ITYPE fv); DESCRIPTION Q_FRAWMASK() returns a q-specific bit mask for q's fractional data bits. Q_GFRAW() returns q's raw masked fractional data bits. Q_GFABSVAL() and Q_GFVAL() return the absolute and real values of q's fractional data bits respectively. Q_SFVAL() sets q's fractional data bits to the value fv. 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 VALUES Q_FRAWMASK(), Q_GFRAW(), Q_GFABSVAL() and Q_GFVAL() return their respec- tive values as integers of the same underlying ITYPE as q. Q_SFVAL() returns the value of q post set. 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 <lstewart@FreeBSD.org> and sponsored by Netflix, Inc. BSD July 8, 2018 BSD
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO | HISTORY | AUTHORS
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