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fmod

Computes the element-wise remainder of vector a elements divided by vector b elements that has the same sign as vector a elements.

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 b_i is nonzero, the result has the same sign as a_i and a magnitude less than the magnitude of b_i.

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

API

Syntax

Buffer API

namespace oneapi::mkl::vm {

sycl::event fmod(sycl::queue & exec_queue,
      std::int64_t n,
      sycl::buffer<T> & a,
      sycl::buffer<T> & b,
      sycl::buffer<T> & y,
      oneapi::mkl::vm::mode mode = oneapi::mkl::vm::mode::not_defined,
      oneapi::mkl::vm::error_handler<T> errhandler = {});

}

namespace oneapi::mkl::vm {

sycl::event fmod(sycl::queue & exec_queue,
      sycl::buffer<T> & a,
      oneapi::mkl::slice sa,
      sycl::buffer<T> & b,
      oneapi::mkl::slice sb,
      sycl::buffer<T> & y,
      oneapi::mkl::slice sy,
      oneapi::mkl::vm::mode mode = oneapi::mkl::vm::mode::not_defined,
      oneapi::mkl::vm::error_handler<T> errhandler = {});

}

USM API

namespace oneapi::mkl::vm {

sycl::event fmod(sycl::queue & exec_queue,
      std::int64_t n,
      T const * a,
      T const * b,
      T * y,
      std::vector<cl::sycl::event> const & depends = {},
      oneapi::mkl::vm::mode mode = oneapi::mkl::vm::mode::not_defined,
      oneapi::mkl::vm::error_handler<T> errhandler = {});

}

namespace oneapi::mkl::vm {

sycl::event fmod(sycl::queue & exec_queue,
      T const * a,
      oneapi::mkl::slice sa,
      T const * b,
      oneapi::mkl::slice sb,
      T * y,
      oneapi::mkl::slice sy,
      std::vector<cl::sycl::event> const & depends = {},
      oneapi::mkl::vm::mode mode = oneapi::mkl::vm::mode::not_defined,
      oneapi::mkl::vm::error_handler<T> errhandler = {});

}

fmod supports the following precisions and devices:

T	Devices supported
float	Host, CPU, and GPU
double	Host, CPU, and GPU

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 containing the 1st input vector.

sa

Slice selector for a. See Data Types for a description of the oneMKL slice type.

b

The buffer containing the 2nd input vector.

sb

Slice selector for b. See Data Types for a description of the oneMKL slice type.

sy

Slice selector for y. See Data Types for a description of the oneMKL slice type.

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 to the 1st input vector.

sa

Slice selector for a. See Data Types for a description of the oneMKL slice type.

b

Pointer to the 2nd input vector.

sb

Slice selector for b. See Data Types for a description of the oneMKL slice type.

sy

Slice selector for y. See Data Types for a description of the oneMKL slice type.

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 containing the output vector of size n.

return value (event)

Computation end event.

USM API

y

Pointer to the output vector of size n.

return value (event)

Computation end event.

Examples

An example of how to use fmod can be found in the oneMKL installation directory, under:

examples/dpcpp/vml/source/vfmod.cpp

linearfrac remainder