trunc¶
Computes an integer valuerounded towards zero for each vector element.
Syntax
Buffer API:
-
void
trunc
(queue &exec_queue, int64_t n, buffer<T, 1> &a, buffer<T, 1> &y, uint64_t mode = mode::not_defined)¶
-
sycl::event
trunc
(sycl::queue &exec_queue, sycl::buffer<T> &a, oneapi::mkl::slice sa, sycl::buffer<T> &y, oneapi::mkl::slice sy, oneapi::mkl::vm::mode lib_mode = oneapi::mkl::vm::mode::not_defined);¶
USM API:
-
event trunc(queue& exec_queue, int64_t n, T\* a, T\* y, vector_class<event> const & depends = {}, uint64_t mode = mode::not_defined )
-
sycl::event
trunc
(sycl::queue &exec_queue, T const *a, oneapi::mkl::slice sa, 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);¶
trunc
supports the following precisions and devices:
T |
Devices supported |
---|---|
|
Host, CPU, and GPU |
|
Host, CPU, and GPU |
Description
The trunc(a)functioncomputes an integer valuerounded towards zero for each vector element.
a_i \geq 0, y_i = \lfloor a_i \rfloor a < 0, y_i = \lceil a_i \rceil
Argument |
Result |
Error Code |
---|---|---|
+0 |
+0 |
|
-0 |
-0 |
|
+∞ |
+∞ |
|
-∞ |
-∞ |
|
QNAN |
QNAN |
|
SNAN |
QNAN |
The trunc function does not generate any errors.
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 input vector of sizen
.- sa
Slice selector for
a
. 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
.
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 input vector of sizen
.- sa
Slice selector for
a
. 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
.
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 trunccan be found in the Intel® oneMKL installation directory, under:
examples/dpcpp/vml/source/vtrunc.cpp