powr¶
Computes a
to the power b
for elements of two vectors, where the
elements of vector argument a
are all non-negative.
Syntax
Buffer API:
void powr(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 powr(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 powr(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 powr(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 = {});
powr
supports the following precisions and devices:
T |
Devices supported |
---|---|
|
Host, CPU, and GPU |
|
Host, CPU, and GPU |
Description
The powr(a,b) function raises each element of vector a
by the
corresponding element of vector b
. The elements of a
are all
nonnegative (a
i≥ 0).
Data Type |
Threshold Limitations on Input Parameters |
---|---|
single precision |
|
double precision |
|
Special values and VM Error Status treatment for v?Powr function are the same as for pow, unless otherwise indicated in this table:
Argument 1 |
Argument 2 |
Result |
Error Code |
---|---|---|---|
|
any value |
NAN |
|
0 < |
±0 |
1 |
|
±0 |
-∞ < |
+∞ |
|
±0 |
-∞ |
+∞ |
|
±0 |
|
+0 |
|
1 |
-∞ < |
1 |
|
±0 |
±0 |
NAN |
|
+∞ |
±0 |
NAN |
|
1 |
+∞ |
NAN |
|
|
NAN |
NAN |
|
NAN |
any value |
NAN |
|
0 < |
-∞ |
+∞ |
|
|
-∞ |
+0 |
|
0 ≤ |
+∞ |
+0 |
|
|
+∞ |
+∞ |
|
+∞ |
|
+0 |
|
+∞ |
|
+∞ |
|
QNAN |
QNAN |
QNAN |
|
QNAN |
SNAN |
QNAN |
|
SNAN |
QNAN |
QNAN |
|
SNAN |
SNAN |
QNAN |
|
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 powrcan be found in the Intel® oneMKL installation directory, under:
examples/dpcpp/vml/source/vpowr.cpp