nextafter¶
Returns vector of elements containing the next representable floating-point values following the values from the elements of one vector in the direction of the corresponding elements of another vector.
Syntax
Buffer API:
void nextafter( 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 = {} )
sycl::event nextafter(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 lib_mode = oneapi::mkl::vm::mode::not_defined, oneapi::mkl::vm::error_handler<T> eh = {});
USM API:
event nextafter( queue& exec_queue, int64_t n, T* a, T* b, T* y, vector_class<event> const & depends = {}, uint64_t mode = mode::not_defined, error_handler<T> errhandler = {} )
sycl::event nextafter(sycl::queue & exec_queue, T const * a, oneapi::mkl::slice sa, T const * b, oneapi::mkl::slice sb, T * y, oneapi::mkl::slice sy, sycl::vector_class<cl::sycl::event> const & depends = {}, oneapi::mkl::vm::mode lib_mode = oneapi::mkl::vm::mode::not_defined, oneapi::mkl::vm::error_handler<T> eh = {});
nextafter
supports the following precisions and devices:
T |
Devices supported |
---|---|
|
Host, CPU, and GPU |
|
Host, CPU, and GPU |
Description
The nextafter(a,b) function returns a vector containing the next representable floating-point values following the first vector argument elements in the direction of the second vector argument’s corresponding elements.
Arguments/Results |
Error Code |
---|---|
Input vector argument element is finite and the corresponding result vector element value is infinite |
|
Result vector element value is subnormal or zero, and different from the corresponding input vector argument element |
|
Even though underflow or overflow can occur, the returned value is independent of the current rounding direction mode.
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 sizen
.- sa
Slice selector for
a
. See Data Types for a description of the oneMKL slice type.- b
The buffer
b
containing 2nd input vector of sizen
.- 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
a
to the 1st input vector of sizen
.- sa
Slice selector for
a
. See Data Types for a description of the oneMKL slice type.- b
Pointer
b
to the 2nd input vector of sizen
.- 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
y
containing the output vector of sizen
.
USM API:
- y
Pointer
y
to the output vector of sizen
.- return value (event)
Function end event.
Example
An example of how to use nextaftercan be found in the Intel® oneMKL installation directory, under:
examples/dpcpp/vml/source/vnextafter.cpp