cosh#

Computes hyperbolic cosine of vector elements.

Syntax

Buffer API:

namespace oneapi::mkl::vm {

sycl::event cosh(
        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 cosh(
        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

cosh supports the following precisions.

T
`float`
`double`
`std::complex<float>`
`std::complex<double>`

Description

The cosh(a) function computes hyperbolic cosine of vector elements.

Data Type	Threshold Limitations on Input Parameters
single precision	`-Log(FLT_MAX)-Log2 <a[i] < Log(FLT_MAX)+Log2`
double precision	`-Log(DBL_MAX)-Log2 <a[i] < Log(DBL_MAX)+Log2`

Argument	Result	Status code
+0	+1
-0	+1
X > overflow	+∞	`oneapi::mkl::vm::status::overflow`
X < -overflow	+∞	`oneapi::mkl::vm::status::overflow`
+∞	+∞
-∞	+∞
QNAN	QNAN
SNAN	QNAN


+i·∞	+∞+i·QNAN	QNAN+i·QNAN	QNAN-i·0	QNAN+i·0	QNAN+i·QNAN	+∞+i·QNAN	QNAN+i·QNAN
+i·Y	+∞·Cos(Y)- i·∞·Sin(Y)					+∞·CIS(Y)	QNAN+i·QNAN
+i·0	+∞-i·0		+1-i·0	+1+i·0		+∞+i·0	QNAN+i·0
-i·0	+∞+i·0		+1+i·0	+1-i·0		+∞-i·0	QNAN-i·0
-i·Y	+∞·Cos(Y)- i·∞·Sin(Y)					+∞·CIS(Y)	QNAN+i·QNAN
-i·∞	+∞+i·QNAN	QNAN+i·QNAN	QNAN+i·0	QNAN-i·0	QNAN+i·QNAN	+∞+i·QNAN	QNAN+i·QNAN
+i·NAN	+∞+i·QNAN	QNAN+i·QNAN	QNAN+i·QNAN	QNAN-i·QNAN	QNAN+i·QNAN	+∞+i·QNAN	QNAN+i·QNAN

Notes:

The complex cosh(a) function sets the VM status code to
oneapi::mkl::vm::status::overflow in the case of overflow, that is, when RE(a), IM(a) are finite non-zero numbers, but the real or imaginary part of the exact result is so large that it does not meet the target precision.
cosh(CONJ(a))=CONJ(cosh(a))
cosh(-a)=cosh(a).

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 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

Parent topic: VM Mathematical Functions