Revert "Introduce intrinsics for double values in Javascript."

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index 47d6042ab4fe8c09eaf322dd292cfc8e6bfa83e3..24bd3a2886827f9c33f5f3fc87cb97e8397819b4 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -7664,34 +7664,6 @@ RUNTIME_UNARY_MATH(log)
 #undef RUNTIME_UNARY_MATH
 
 
-RUNTIME_FUNCTION(MaybeObject*, Runtime_DoubleHi) {
-  SealHandleScope shs(isolate);
-  ASSERT(args.length() == 1);
-  CONVERT_DOUBLE_ARG_CHECKED(x, 0);
-  return isolate->heap()->NumberFromDouble(
-      static_cast<int32_t>(double_to_uint64(x) >> 32));
-}
-
-
-RUNTIME_FUNCTION(MaybeObject*, Runtime_DoubleLo) {
-  SealHandleScope shs(isolate);
-  ASSERT(args.length() == 1);
-  CONVERT_DOUBLE_ARG_CHECKED(x, 0);
-  return isolate->heap()->NumberFromDouble(
-      static_cast<int32_t>(double_to_uint64(x) & 0xFFFFFFFFu));
-}
-
-
-RUNTIME_FUNCTION(MaybeObject*, Runtime_ConstructDouble) {
-  SealHandleScope shs(isolate);
-  ASSERT(args.length() == 2);
-  CONVERT_NUMBER_CHECKED(uint32_t, hi, Uint32, args[0]);
-  CONVERT_NUMBER_CHECKED(uint32_t, lo, Uint32, args[1]);
-  uint64_t result = (static_cast<uint64_t>(hi) << 32) | lo;
-  return isolate->heap()->AllocateHeapNumber(uint64_to_double(result));
-}
-
-
 // Cube root approximation, refer to: http://metamerist.com/cbrt/cbrt.htm
 // Using initial approximation adapted from Kahan's cbrt and 4 iterations
 // of Newton's method.