implement llrint properly; fixes #1380

2 files changed, 17 insertions, 2 deletions

diff --git a/src/library.js b/src/library.js
index 24e35178..fb2d990b 100644
--- a/src/library.js
+++ b/src/library.js
@@ -5735,8 +5735,11 @@ LibraryManager.library = {
   rintf: 'rint',
   lrint: 'rint',
   lrintf: 'rint',
-  llrint: 'rint',
-  llrintf: 'rint',
+  llrint: function(x) {
+    x = (x < 0) ? -Math.round(-x) : Math.round(x);
+    {{{ makeStructuralReturn(splitI64('x')) }}};
+  },
+  llrintf: 'llrint',
   nearbyint: 'rint',
   nearbyintf: 'rint',
   trunc: function(x) {
diff --git a/tests/runner.py b/tests/runner.py
index 1f6b39f4..0efcce86 100755
--- a/tests/runner.py
+++ b/tests/runner.py
@@ -1981,6 +1981,18 @@ Succeeded!
         self.do_run(src, "1.0 2.0 -1.0 -2.0 2.0 3.0 -2.0 -3.0 "
                          "1 2 -1 -2 2 2 -2 -2")
 
+    def test_llrint(self):
+      if Settings.USE_TYPED_ARRAYS != 2: return self.skip('requires ta2')
+      src = r'''
+        #include <stdio.h>
+        #include <math.h>
+        int main() {
+          printf("%lld\n%lld\n%lld\n%lld\n", llrint(0.1), llrint(0.6), llrint(1.25), llrint(1099511627776.667));
+          return 0;
+        }
+      '''
+      self.do_run(src, '0\n1\n1\n1099511627777\n')
+
     def test_getgep(self):
         # Generated code includes getelementptr (getelementptr, 0, 1), i.e., GEP as the first param to GEP
         src = '''