[turbofan] Add support for reinterpreting integers as floating point and vice versa.

src/compiler/machine-operator.h

Index: src/compiler/machine-operator.h
diff --git a/src/compiler/machine-operator.h b/src/compiler/machine-operator.h
index 9eaf640cd9db62b8ee3d94a449b661d8e1fe8eed..27abfb4accca6e52ecbfe5c481fe82256a2d8402 100644
--- a/src/compiler/machine-operator.h
+++ b/src/compiler/machine-operator.h
@@ -195,6 +195,13 @@ class MachineOperatorBuilder final : public ZoneObject {
   const Operator* TruncateFloat64ToInt32(TruncationMode);
   const Operator* TruncateInt64ToInt32();
 
+  // These operators reinterpret the bits of a floating point number as an
+  // integer and vice versa.
+  const Operator* BitcastFloat32ToInt32();
+  const Operator* BitcastFloat64ToInt64();
+  const Operator* BitcastInt32ToFloat32();
+  const Operator* BitcastInt64ToFloat64();
+
   // Floating point operators always operate with IEEE 754 round-to-nearest
   // (single-precision).
   const Operator* Float32Add();