Implement trigonometric functions using a fdlibm port.

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index 61e1069d0db35242be66e6f2031c9b098760b064..7e3ff7c40af69374fa8341607720bf5f6c048d82 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -35,6 +35,7 @@
 #include "src/misc-intrinsics.h"
 #include "src/parser.h"
 #include "src/prototype.h"
+#include "src/rempio2.h"
 #include "src/runtime.h"
 #include "src/runtime-profiler.h"
 #include "src/scopeinfo.h"
@@ -7629,6 +7630,21 @@ RUNTIME_FUNCTION(Runtime_ConstructDouble) {
 }
 
 
+RUNTIME_FUNCTION(Runtime_RemPiO2) {
+  HandleScope handle_scope(isolate);
+  ASSERT(args.length() == 1);
+  CONVERT_DOUBLE_ARG_CHECKED(x, 0);
+  Factory* factory = isolate->factory();
+  double y[2];
+  int n = rempio2(x, y);
+  Handle<FixedArray> array = factory->NewFixedArray(3);
+  array->set(0, Smi::FromInt(n));
+  array->set(1, *factory->NewHeapNumber(y[0]));
+  array->set(2, *factory->NewHeapNumber(y[1]));
+  return *factory->NewJSArrayWithElements(array);
+}
+
+
 static const double kPiDividedBy4 = 0.78539816339744830962;