maxmag

maxmag#

Returns the element with the larger magnitude between each pair of elements of the two vector arguments.

Syntax

Buffer API:

namespace oneapi::mkl::vm {

sycl::event maxmag(
        sycl::queue& exec_queue,
        std::int64_t n,
        sycl::buffer<T,1>& a,
        sycl::buffer<T,1>& b,
        sycl::buffer<T,1>& y,
        oneapi::mkl::vm::mode mode = oneapi::mkl::vm::mode::not_defined);

} // namespace oneapi::mkl::vm

USM API:

namespace oneapi::mkl::vm {

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

} // namespace oneapi::mkl::vm

maxmag supports the following precisions.

T
`float`
`double`

Description

The maxmag(a, b) function returns a vector with element values equal to the element with the larger magnitude from each pair of corresponding elements of the two vectors a and b:

If |a| > |b| maxmag(a, b) returns a,
otherwise maxmag(a, b) returns b.
If |b| > |a| maxmag(a, b) returns b,
otherwise maxmag(a, b) returns a.
Otherwise maxmag(a, b) behaves like fmax.

Argument 1	Argument 2	Result
`a` not NAN	NAN	`a`
NAN	`b` not NAN	`b`
NAN	NAN	NAN

The maxmag(a, b) 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 1st input vector of size n.
b: The buffer b containing 2nd 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.

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.
b: Pointer b to the 2nd 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.

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