[OpenACC] Add PGI support for Power 9

CHANGELOG.md

@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 ## [Unreleased]
 
 ### Added
-- OpenACC flags to build for Volta, Skylake and KNL.
+- OpenACC flags to build for Power 9, Volta, Skylake and KNL.
 - Kokkos list CLI argument shows some information about which device will be used.
 - OpenMP GNU compiler now uses native target flag.
 - Support CSV output for Triad only running mode.

OpenACC.make

@@ -20,6 +20,7 @@ define target_help
 Set a TARGET to ensure PGI targets the correct offload device.
 Available targets are:
   SNB, IVB, HSW, SKL, KNL
+  PWR9
   KEPLER, MAXWELL, PASCAL, VOLTA
   HAWAII
 endef
@@ -31,6 +32,7 @@ TARGET_FLAGS_IVB     = -ta=multicore -tp=ivybridge
 TARGET_FLAGS_HSW     = -ta=multicore -tp=haswell
 TARGET_FLAGS_SKL     = -ta=multicore -tp=skylake
 TARGET_FLAGS_KNL     = -ta=multicore -tp=knl
+TARGET_FLAGS_PWR9    = -ta=multicore -tp=pwr9
 TARGET_FLAGS_KEPLER  = -ta=nvidia:cc35
 TARGET_FLAGS_MAXWELL = -ta=nvidia:cc50
 TARGET_FLAGS_PASCAL  = -ta=nvidia:cc60