Visible to Intel only — GUID: GUID-8DA90212-4709-4D6B-B930-B10EA82C115C
Visible to Intel only — GUID: GUID-8DA90212-4709-4D6B-B930-B10EA82C115C
frac
Computes the element-wise signed fractional part of vector elements.
Description
The frac(a) function computes a signed fractional part for each vector element.
![](/content/dam/docs/us/en/developer-reference-dpcpp/2024-2/03295502-88C5-45FA-8BC9-4B74F9F5AD0A-low.png)
![](/content/dam/docs/us/en/developer-reference-dpcpp/2024-2/83107E2A-6538-4ADC-9269-719A6D4EEE50-low.png)
Argument |
Result |
Error Code |
---|---|---|
+0 |
+0 |
|
-0 |
-0 |
|
+ |
+0 |
|
- |
-0 |
|
QNAN |
QNAN |
|
SNAN |
QNAN |
The frac function does not generate any errors.
API
Syntax
Buffer API
namespace oneapi::mkl::vm {
sycl::event frac(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 frac(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 frac(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 frac(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);
}
frac 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 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 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 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 frac can be found in the oneMKL installation directory, under:
share/doc/mkl/examples/sycl/vml/source/vfrac.cpp