Reland "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 5e18c97bdcf0afdcf75ced9083bc35fdbb4dd14b..cc41117ead4fd9dec1613bbf553d465ff7101e8f 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -45,6 +45,7 @@
 #include "src/utils.h"
 #include "src/v8threads.h"
 #include "src/vm-state-inl.h"
+#include "third_party/fdlibm/fdlibm.h"
 
 #ifdef V8_I18N_SUPPORT
 #include "src/i18n.h"
@@ -7683,6 +7684,23 @@ RUNTIME_FUNCTION(Runtime_ConstructDouble) {
 }
 
 
+RUNTIME_FUNCTION(Runtime_RemPiO2) {
+  HandleScope handle_scope(isolate);
+  DCHECK(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);
+  Handle<HeapNumber> y0 = factory->NewHeapNumber(y[0]);
+  Handle<HeapNumber> y1 = factory->NewHeapNumber(y[1]);
+  array->set(0, Smi::FromInt(n));
+  array->set(1, *y0);
+  array->set(2, *y1);
+  return *factory->NewJSArrayWithElements(array);
+}
+
+
 static const double kPiDividedBy4 = 0.78539816339744830962;