REMQUO(3)

NAME
1.47 `remquo', `remquof'-remainder and part of quotient

SYNOPSIS
     #include <math.h>
     double remquo(double X, double Y, int *QUO);
     float remquof(float X, float Y, int *QUO);

DESCRIPTION
The `remquo' functions compute the same remainder as the `remainder' functions; this value is in the range -Y/2 ... +Y/2. In the object pointed to by `quo' they store a value whose sign is the sign of `x'/`y' and whose magnitude is congruent modulo 2**n to the magnitude of the integral quotient of `x'/`y'. (That is, `quo' is given the n lsbs of the quotient, not counting the sign.) This implementation uses n=31 if int is 32 bits or more, otherwise, n is 1 less than the width of int.
   For example:
         remquo(-29.0, 3.0, &QUO)
   returns -1.0 and sets QUO=10, and
         remquo(-98307.0, 3.0, &QUO)
   returns -0.0 and sets QUO=-32769, although for 16-bit int, QUO=-1. In the latter case, the actual quotient of -(32769=0x8001) is reduced to -1 because of the 15-bit limitation for the quotient.

RETURNS
When either argument is NaN, NaN is returned. If Y is 0 or X is infinite (and neither is NaN), a domain error occurs (i.e. the "invalid" floating point exception is raised or errno is set to EDOM), and NaN is returned. Otherwise, the `remquo' functions return X REM Y. *Bugs*
IEEE754-2008 calls for `remquo'(subnormal, inf) to cause the "underflow" floating-point exception. This implementation does not.

PORTABILITY
C99, POSIX.

SEE ALSO
remquo is part of the library. The full documentation for is maintained as a Texinfo manual. If info and are properly installed at your site, the command

    info

will give you access to the complete manual.