1 files changed, 73 insertions, 0 deletions
diff --git a/Source/Parser/GpuParser.cpp b/Source/Parser/GpuParser.cpp
new file mode 100644
index 000000000..97b96d465
--- /dev/null
+++ b/Source/Parser/GpuParser.cpp
@@ -0,0 +1,73 @@
+#include <GpuParser.H>
+
+GpuParser::GpuParser (WarpXParser const& wp)
+{
+#ifdef AMREX_USE_GPU
+
+    struct wp_parser* a_wp = wp.m_parser;
+    // Initialize GPU parser: allocate memory in CUDA managed memory,
+    // copy all data needed on GPU to m_gpu_parser
+    m_gpu_parser.sz_mempool = wp_ast_size((struct wp_node*)a_wp);
+    m_gpu_parser.p_root = (struct wp_node*)
+        amrex::The_Managed_Arena()->alloc(m_gpu_parser.sz_mempool);
+    m_gpu_parser.p_free = m_gpu_parser.p_root;
+    // 0: don't free the source
+    m_gpu_parser.ast = wp_parser_ast_dup(&m_gpu_parser, a_wp->ast, 0);
+    wp_parser_regvar_gpu(&m_gpu_parser, "x", 0);
+    wp_parser_regvar_gpu(&m_gpu_parser, "y", 1);
+    wp_parser_regvar_gpu(&m_gpu_parser, "z", 2);
+
+    // Initialize CPU parser: allocate memory in CUDA managed memory,
+    // copy all data needed on CPU to m_cpu_parser
+    m_cpu_parser.sz_mempool = wp_ast_size((struct wp_node*)a_wp);
+    m_cpu_parser.p_root = (struct wp_node*)
+        amrex::The_Managed_Arena()->alloc(m_cpu_parser.sz_mempool);
+    m_cpu_parser.p_free = m_cpu_parser.p_root;
+    // 0: don't free the source
+    m_cpu_parser.ast = wp_parser_ast_dup(&m_cpu_parser, a_wp->ast, 0);
+    wp_parser_regvar(&m_cpu_parser, "x", &(m_var.x));
+    wp_parser_regvar(&m_cpu_parser, "y", &(m_var.y));
+    wp_parser_regvar(&m_cpu_parser, "z", &(m_var.z));
+    
+#else // not defined AMREX_USE_GPU
+
+#ifdef _OPENMP
+    nthreads = omp_get_max_threads();
+#else // _OPENMP
+    nthreads = 1;
+#endif // _OPENMP
+
+    m_parser = ::new struct wp_parser*[nthreads];
+    m_var = ::new amrex::XDim3[nthreads];
+
+    for (int tid = 0; tid < nthreads; ++tid)
+    {
+#ifdef _OPENMP
+        m_parser[tid] = wp_parser_dup(wp.m_parser[tid]);
+#else // _OPENMP
+        m_parser[tid] = wp_parser_dup(wp.m_parser);
+#endif // _OPENMP
+        wp_parser_regvar(m_parser[tid], "x", &(m_var[tid].x));
+        wp_parser_regvar(m_parser[tid], "y", &(m_var[tid].y));
+        wp_parser_regvar(m_parser[tid], "z", &(m_var[tid].z));
+    }
+
+#endif // AMREX_USE_GPU
+}
+
+void
+GpuParser::clear ()
+{
+#ifdef AMREX_USE_GPU
+    amrex::The_Managed_Arena()->free(m_gpu_parser.ast);
+    amrex::The_Managed_Arena()->free(m_cpu_parser.ast);
+#else
+    for (int tid = 0; tid < nthreads; ++tid)
+    {
+        wp_parser_delete(m_parser[tid]);
+    }
+    ::delete[] m_parser;
+    ::delete[] m_var;
+#endif
+}
+