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Visible to Intel only — GUID: GUID-2A59C349-7163-4058-9C01-B9302BE0DA42
Visible to Intel only — GUID: GUID-2A59C349-7163-4058-9C01-B9302BE0DA42
trunc
Computes the element-wise rounding of vector elements to the nearest integer towards zero.
Description
The trunc(a) function computes an integer value rounded towards zero for each vector element.
Argument |
Result |
Error Code |
|---|---|---|
+0 |
+0 |
|
-0 |
-0 |
|
+ |
+ |
|
- |
- |
|
QNAN |
QNAN |
|
SNAN |
QNAN |
The trunc function does not generate any errors.
API
Syntax
Buffer API
namespace oneapi::mkl::vm { sycl::event trunc(sycl::queue & exec_queue, std::int64_t n, sycl::buffer<T> & a, sycl::buffer<T> & y, oneapi::mkl::vm::mode mode = oneapi::mkl::vm::mode::not_defined); }
namespace oneapi::mkl::vm { 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 mode = oneapi::mkl::vm::mode::not_defined); }
USM API
namespace oneapi::mkl::vm { sycl::event trunc(sycl::queue & exec_queue, std::int64_t n, T const * a, T * y, std::vector<sycl::event> const & depends = {}, oneapi::mkl::vm::mode mode = oneapi::mkl::vm::mode::not_defined); }
namespace oneapi::mkl::vm { sycl::event trunc(sycl::queue & exec_queue, T const * a, oneapi::mkl::slice sa, T * y, oneapi::mkl::slice sy, std::vector<sycl::event> const & depends = {}, oneapi::mkl::vm::mode mode = oneapi::mkl::vm::mode::not_defined); }
trunc supports the following precisions and devices:
T |
Devices supported |
|---|---|
sycl::half |
GPU |
_Float16 |
CPU |
float |
CPU and GPU |
double |
CPU and GPU |
Input Parameters
Buffer API
- exec_queue
-
The queue where the routine will be executed.
- n
-
Specifies the number of elements to be calculated.
- a
-
The buffer containing the input vector.
- sa
-
Slice selector for a. See Data Types for a description of the oneMKL slice type.
- sy
-
Slice selector for y. See 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 will be executed.
- n
-
Specifies the number of elements to be calculated.
- a
-
Pointer to the input vector.
- 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). This is an optional parameter. The default is an empty vector.
- 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.
Output Parameters
Buffer API
- y
-
The buffer containing the output vector.
- return value (event)
-
Computation end event.
USM API
- y
-
Pointer to the output vector.
- return value (event)
-
Computation end event.
Examples
An example of how to use trunc can be found in the oneMKL installation directory, under:
share/doc/mkl/examples/sycl/vml/source/vtrunc.cpp