fdlibm: reduce accuracy slightly in favor of performance.

src/runtime.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdlib.h>
 #include <limits>
 
 #include "v8.h"
 
 #include "accessors.h"
@@ skipping 7761 matching lines @@
   uint64_t result = (static_cast<uint64_t>(hi) << 32) | lo;
   return *isolate->factory()->NewNumber(uint64_to_double(result));
 }
 
 
 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);
+  double y;
+  int n = rempio2(x, &y);
+  Handle<FixedArray> array = factory->NewFixedArray(2);
   array->set(0, Smi::FromInt(n));
-  array->set(1, *factory->NewHeapNumber(y[0]));
-  array->set(2, *factory->NewHeapNumber(y[1]));
+  array->set(1, *factory->NewHeapNumber(y));
   return *factory->NewJSArrayWithElements(array);
 }
 
 
 static const double kPiDividedBy4 = 0.78539816339744830962;
 
 
 RUNTIME_FUNCTION(Runtime_MathAtan2) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 2);
@@ skipping 7336 matching lines @@
   }
   return NULL;
 }
 
 
 const Runtime::Function* Runtime::FunctionForId(Runtime::FunctionId id) {
   return &(kIntrinsicFunctions[static_cast<int>(id)]);
 }
 
 } }  // namespace v8::internal