+/**
+ * A runtime routine description.
+ */
+typedef struct _runtime_rt {
+ entity *ent; /**< The entity representing the runtime routine. */
+ ir_mode *mode; /**< The operation mode of the mapped instruction. */
+ long mem_proj_nr; /**< if >= 0, create a memory ProjM() */
+ long exc_proj_nr; /**< if >= 0, create a exception ProjX() */
+ long exc_mem_proj_nr; /**< if >= 0, create a exception memory ProjM() */
+ long res_proj_nr; /**< if >= 0, first result projection number */
+} runtime_rt;
+
+/**
+ * A mapper for mapping unsupported instructions to runtime calls.
+ * Maps a op(arg_0, ..., arg_n) into a call to a runtime function
+ * rt(arg_0, ..., arg_n).
+ *
+ * The mapping is only done, if the modes of all arguments matches the
+ * modes of rt's argument.
+ * Further, if op has a memory input, the generated Call uses it, else
+ * it gets a NoMem.
+ * The pinned state of the Call will be set to the pinned state of op.
+ *
+ * Note that i_mapper_RuntimeCall() must be used with a i_instr_record.
+ *
+ * @return 1 if an op was mapped, 0 else
+ *
+ * Some examples:
+ *
+ * - Maps Div nodes to calls to rt_Div():
+ @code
+ runtime_rt rt_Div = {
+ ent("int rt_Div(int, int)"),
+ mode_T,
+ pn_Div_M,
+ pn_Div_X_except,
+ pn_Div_M,
+ pn_Div_res
+ };
+ i_instr_record map_Div = {
+ INTRINSIC_INSTR,
+ op_Div,
+ i_mapper_RuntimeCall,
+ &rt_Div,
+ NULL
+ };
+ @endcode
+ *
+ * - Maps ConvD(F) to calls to rt_Float2Div():
+ @code
+ runtime_rt rt_Float2Double = {
+ ent("double rt_Float2Div(float)"),
+ get_type_mode("double"),
+ -1,
+ -1,
+ -1,
+ -1
+ };
+ i_instr_record map_Float2Double = {
+ INTRINSIC_INSTR,
+ op_Conv,
+ i_mapper_RuntimeCall,
+ &rt_Float2Double,
+ NULL
+ };
+ @endcode
+ */
+int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt);
+