Implement llabs().

2 files changed, 22 insertions, 0 deletions

diff --git a/src/library.js b/src/library.js
index a5166c72..848a2571 100644
--- a/src/library.js
+++ b/src/library.js
@@ -3670,6 +3670,17 @@ LibraryManager.library = {
 
   abs: 'Math.abs',
   labs: 'Math.abs',
+#if USE_TYPED_ARRAYS == 2
+  llabs__deps: [function() { Types.preciseI64MathUsed = 1 }],
+  llabs: function(lo, hi) {
+    i64Math.abs(lo, hi);
+    {{{ makeStructuralReturn([makeGetTempDouble(0, 'i32'), makeGetTempDouble(1, 'i32')]) }}};
+  },
+#else
+  llabs: function(lo, hi) {
+    throw 'unsupported llabs';
+  },
+#endif
 
   exit__deps: ['_exit'],
   exit: function(status) {
diff --git a/src/long.js b/src/long.js
index c3b0e605..c3651bd9 100644
--- a/src/long.js
+++ b/src/long.js
@@ -1551,6 +1551,17 @@ var i64Math = (function() { // Emscripten wrapper
       HEAP32[tempDoublePtr>>2] = ret.low_;
       HEAP32[tempDoublePtr+4>>2] = ret.high_;
     },
+    abs: function(l, h) {
+      var x = new goog.math.Long(l, h);
+      var ret;
+      if (x.isNegative()) {
+        ret = x.negate();
+      } else {
+        ret = x;
+      }
+      HEAP32[tempDoublePtr>>2] = ret.low_;
+      HEAP32[tempDoublePtr+4>>2] = ret.high_;
+    },
     ensureTemps: function() {
       if (Wrapper.ensuredTemps) return;
       Wrapper.ensuredTemps = true;