Contents

# Remainder Functions

Many routines in the
Intel® oneAPI
DPC++/C++
Compiler
Math Library are more optimized for Intel® microprocessors than for non-Intel microprocessors.
The
mathimf.h
Intel® oneAPI
DPC++/C++
Compiler
Math Library functions.
The math library supports the following remainder functions:
FP16 Math Functions have the following requirements:
• Version 2021.4 or higher of the Intel® oneAPI DPC++/C++ Compiler.
• A next-generation Intel® Xeon® Scalable processor, code name Sapphire Rapids.

## fmod

Description:
The
fmod
function returns the value
x-n*y
for integer
n
such that if
y
is nonzero, the result has the same sign as
x
and magnitude less than the magnitude of
y
.
errno
: EDOM, for y = 0
Calling interface:
double fmod(double x, double y);
long double fmodl(long double x, long double y);
float fmodf(float x, float y);
_Float16 fmodf16(_Float16 x, _Float16 y);

## remainder

Description:
The
remainder
function returns the value of
x REM y
as required by the IEEE standard.
errno:
EDOM, for y = 0
Calling interface:
double remainder(double x, double y);
long double remainderl(long double x, long double y);
float remainderf(float x, float y);
_Float16 remainderf16(_Float16 x, _Float16 y);

## remquo

Description:
The
remquo
function returns the value of
x REM y
. In the object pointed to by
quo
the function stores a value whose sign is the sign of
x/y
and whose magnitude is congruent modulo 2
n
of the integral quotient of
x/y
.
N
is an implementation-defined integer. For all systems,
N
is equal to 31.
errno:
EDOM, for y = 0
Calling interface:
double remquo(double x, double y, int *quo);
long double remquol(long double x, long double y, int *quo);
float remquof(float x, float y, int *quo);
_Float16 remquof16(_Float16 x, _Float16 y, int *quo);

#### Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.