## OpenACC™ update directive

  Makes the host's copy of a (sub)array consistent with the device's copy, or makes the device's copy consistent with the host's.

`!$acc update` clause [, clause ...] | `#pragma acc update` clause [, clause ...]

Supported clauses are `host, device, if, async.`

For more information, see Section 2.12.1 of The OpenACC™ Application Programming Interface, Version 1.0, available from http://www.openacc-standard.org.

OpenACC™ Application Programming Interface Version 1.0