fmod

The fmod function performs element by element computation of the modulus function of vector a with respect to vector b.

Syntax

Buffer API:

void fmod(queue &exec_queue, int64_t n, buffer<T, 1> &a, buffer<T, 1> &b, buffer<T, 1> &y, uint64_t mode = mode::not_defined, error_handler<T> errhandler = {})

USM API:

event fmod(queue &exec_queue, int64_t n, T *a, T *b, T *y, uint64_t mode = mode::not_defined, error_handler<T> errhandler = {})

fmod supports the following precisions and devices:

T

Devices supported

float

Host, CPU, and GPU

double

Host, CPU, and GPU

Description

The fmod (a,b) function computes the modulus function of each element of vector a, with respect to the corresponding elements of vector b:

ai - bi*trunc(ai/bi)

In general, the modulus function fmod (ai, bi) returns the value ai - n*bi for some integer n such that if bi is nonzero, the result has the same sign as ai and a magnitude less than the magnitude of bi.

Argument 1

Argument 2

Result

Error Code

a not NAN

±0

NAN

status::sing

±∞

b not NAN

NAN

status::sing

±0

b≠ 0, not NAN

±0

a finite

±∞

a

NAN

b

a

NAN

NAN

Input Parameters

Buffer API:

exec_queue

The queue where the routine should be executed.

n

Specifies the number of elements to be calculated.

a

The buffer a containing 1st input vector of size n.

b

The buffer b containing 2nd input vector of size n.

mode

Overrides the global VM mode setting for this function call. See set_mode function for possible values and their description. This is an optional parameter. The default value is mode::not_defined.

errhandler

Sets local error handling mode for this function call. See the create_error_handler function for arguments and their descriptions. This is an optional parameter. The local error handler is disabled by default.

USM API:

exec_queue

The queue where the routine should be executed.

n

Specifies the number of elements to be calculated.

a

Pointer a to the 1st input vector of size n.

b

Pointer b to the 2nd input vector of size n.

depends

Vector of dependent events (to wait for input data to be ready).

mode

Overrides the global VM mode setting for this function call. See the set_mode function for possible values and their description. This is an optional parameter. The default value is mode::not_defined.

errhandler

Sets local error handling mode for this function call. See the create_error_handler function for arguments and their descriptions. This is an optional parameter. The local error handler is disabled by default.

Output Parameters

Buffer API:

y

The buffer y containing the output vector of size n.

USM API:

y

Pointer y to the output vector of size n.

return value (event)

Function end event.

Example

An example of how to use fmodcan be found in the Intel® oneMKL installation directory, under:

examples/sycl/vml/vfmod.cpp