# sqrt#

Computes a square root of vector elements.

Syntax

Buffer API:

```namespace oneapi::mkl::vm {

sycl::event sqrt(
sycl::queue& exec_queue,
std::int64_t n,
sycl::buffer<T,1>& a,
sycl::buffer<T,1>& y,
oneapi::mkl::vm::mode mode = oneapi::mkl::vm::mode::not_defined,
oneapi::mkl::vm::error_handler<T> errhandler = {});

} // namespace oneapi::mkl::vm
```

USM API:

```namespace oneapi::mkl::vm {

sycl::event sqrt(
sycl::queue& exec_queue,
std::int64_t n,
const T *a,
T* y,
std::vector<sycl::event> const & depends = {},
oneapi::mkl::vm::mode mode = oneapi::mkl::vm::mode::not_defined,
oneapi::mkl::vm::error_handler<T> errhandler = {});

} // namespace oneapi::mkl::vm
```

`sqrt` supports the following precisions.

T

`float`

`double`

`std::complex<float>`

`std::complex<double>`

Description

The sqrt function computes a square root of vector elements.

Argument

Result

VM status code

a< +0

QNAN

`oneapi::mkl::vm::status::errdom`

+0

+0

-0

-0

-∞

QNAN

`oneapi::mkl::vm::status::errdom`

+∞

+∞

QNAN

QNAN

SNAN

QNAN

+i·∞

+∞+i·∞

+∞+i·∞

+∞+i·∞

+∞+i·∞

+∞+i·∞

+∞+i·∞

+∞+i·∞

+i·Y

+0+i·∞

+∞+i·0

+i·0

+0+i·∞

+0+i·0

+0+i·0

+∞+i·0

-i·0

+0-i·∞

+0-i·0

+0-i·0

+∞-i·0

-i·Y

+0-i·∞

+∞-i·0

-i·∞

+∞-i·∞

+∞-i·∞

+∞-i·∞

+∞-i·∞

+∞-i·∞

+∞-i·∞

+∞-i·∞

+i·NAN

Notes:

• `Sqrt(CONJ(z))=CONJ(Sqrt(z))`.

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 size `n`.

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 `oneapi::mkl::vm::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 size `n`.

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 `oneapi::mkl::vm::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 size `n`.

USM API:

y

Pointer `y` to the output vector of size `n`.

return value (event)

Event, signifying availability of computed output and status code(s).

Exceptions

For list of generated exceptions please refer to  Exceptions