clear_status

clear_status

Resets the global VM status to oneapi::mkl::vm::status::success and returns the previous VM status code.

Syntax

namespace oneapi::mkl::vm {

    oneapi::mkl::vm::status clear_status(
        sycl::queue& exec_queue);

} // namespace oneapi::mkl::vm

Description

The clear_status function sets the VM status code to oneapi::mkl::vm::status::success and returns the previous VM status code for a given queue.

The global VM status is a single value and it registers the bitwise-OR of status codes that happened inside VM functions run on the specific queue. For performance reasons, it might be done in non-atomic manner. The possible status codes are listed in the table below.

Status code

Description

Successful Execution

oneapi::mkl::vm::status::success

VM function execution completed successfully

oneapi::mkl::vm::status::not_defined

VM status not defined

Warnings

oneapi::mkl::vm::status::accuracy_warning

VM function execution completed successfully in a different accuracy mode

Computational status codes

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

Values are out of a range of definition producing invalid (QNaN) result

oneapi::mkl::vm::status::sing

Values cause divide-by-zero (singularity) computational errors and produce and invalid (QNaN or Inf) result

oneapi::mkl::vm::status::overflow

An overflow happened during the calculation process

oneapi::mkl::vm::status::underflow

An underflow happened during the calculation process

Input Parameters

exec_queue

The queue where the routine should be executed.

Output Parameters

return value (old_status)

Specifies the VM status code before the call.