1 files changed, 71 insertions, 0 deletions
diff --git a/erts/preloaded/src/prim_eval.S b/erts/preloaded/src/prim_eval.S
new file mode 100644
index 0000000000..1b7b00a7c9
--- /dev/null
+++ b/erts/preloaded/src/prim_eval.S
@@ -0,0 +1,71 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2013. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+{module, prim_eval}.
+
+%% This module uses low-level BEAM instructions for the message queue facility
+%% to allow erl_eval to evaluate receive expressions correctly.
+
+{exports, [{'receive',2},{module_info,0},{module_info,1}]}.
+
+{attributes, []}.
+
+{labels, 10}.
+
+
+{function, 'receive', 2, 2}.
+  {label,1}.
+    {func_info,{atom,prim_eval},{atom,'receive'},2}.
+  {label,2}.
+    {allocate,2,2}.
+    {move,{x,1},{y,0}}.
+    {move,{x,0},{y,1}}.
+  {label,3}.
+    {loop_rec,{f,5},{x,0}}.
+    {move,{y,1},{x,1}}.
+    {call_fun,1}.
+    {test,is_ne_exact,{f,4},[{x,0},{atom,nomatch}]}.
+    remove_message.
+    {deallocate,2}.
+    return.
+  {label,4}.
+    {loop_rec_end,{f,3}}.
+  {label,5}.
+    {wait_timeout,{f,3},{y,0}}.
+    timeout.
+    {move,{atom,timeout},{x,0}}.
+    {deallocate,2}.
+    return.
+
+
+{function, module_info, 0, 8}.
+  {label,6}.
+    {func_info,{atom,prim_eval},{atom,module_info},0}.
+  {label,7}.
+    {move,{atom,prim_eval},{x,0}}.
+    {call_ext_only,1,{extfunc,erlang,get_module_info,1}}.
+
+
+{function, module_info, 1, 10}.
+  {label,8}.
+    {func_info,{atom,prim_eval},{atom,module_info},1}.
+  {label,9}.
+    {move,{x,0},{x,1}}.
+    {move,{atom,prim_eval},{x,0}}.
+    {call_ext_only,2,{extfunc,erlang,get_module_info,2}}.