Feb2021 GPU Package Update - GPU Package Files

lib/gpu/geryon/hip_texture.h

@@ -107,6 +107,37 @@ class UCL_Texture {
   }
 };
 
+/// Class storing a const global memory reference
+class UCL_Const {
+ public:
+  UCL_Const() {}
+  ~UCL_Const() {}
+  /// Construct with a specified global reference
+  inline UCL_Const(UCL_Program &prog, const char *global_name)
+    { get_global(prog,global_name); }
+  /// Set the global reference for this object
+  inline void get_global(UCL_Program &prog, const char *global_name) {
+    _cq=prog.cq();
+    CU_SAFE_CALL(hipModuleGetGlobal(&_global, &_global_bytes, prog._module,
+				    global_name)); 
+  }
+  /// Copy from array on host to const memory
+  template <class numtyp>
+  inline void update_device(UCL_H_Vec<numtyp> &src, const int numel) {
+    CU_SAFE_CALL(hipMemcpyHtoDAsync(_global, src.begin(), numel*sizeof(numtyp),
+				    _cq));
+  }
+  /// Get device ptr associated with object
+  inline const void* begin() const { return &_global; }
+  inline void clear() {}
+
+ private:
+  hipStream_t _cq;
+  void* _global;
+  size_t _global_bytes;
+  friend class UCL_Kernel;
+};
+
 } // namespace
 
 #endif