handle unsigned reads in safe heap

1 files changed, 6 insertions, 3 deletions

diff --git a/src/preamble.js b/src/preamble.js
index d70ef4b1..d415b87e 100644
--- a/src/preamble.js
+++ b/src/preamble.js
@@ -189,13 +189,16 @@ function SAFE_HEAP_STORE(dest, value, bytes, isFloat) {
   setValue(dest, value, getSafeHeapType(bytes, isFloat), 1);
 }
 
-function SAFE_HEAP_LOAD(dest, bytes, isFloat) {
+function SAFE_HEAP_LOAD(dest, bytes, isFloat, unsigned) {
 #if SAFE_HEAP_LOG
-  Module.print('SAFE_HEAP load: ' + [dest, bytes, isFloat]);
+  Module.print('SAFE_HEAP load: ' + [dest, bytes, isFloat, unsigned]);
 #endif
   assert(dest > 0, 'segmentation fault');
   assert(dest % bytes === 0);
-  return getValue(dest, getSafeHeapType(bytes, isFloat), 1);
+  var type = getSafeHeapType(bytes, isFloat);
+  var ret = getValue(dest, type, 1);
+  if (unsigned) ret = unSign(ret, parseInt(type.substr(1)), 1);
+  return ret;
 }
 
 #endif