8313875: Use literals instead of static fields in java.util.Math: two…

…ToTheDoubleScaleUp, twoToTheDoubleScaleDown

Reviewed-by: redestad, darcy, bpb, rgiulietti

src/java.base/share/classes/java/lang/Math.java

@@ -3346,12 +3346,12 @@ public static double scalb(double d, int scaleFactor) {
         if(scaleFactor < 0) {
             scaleFactor = Math.max(scaleFactor, -MAX_SCALE);
             scale_increment = -512;
-            exp_delta = twoToTheDoubleScaleDown;
+            exp_delta = 0x1p-512;
         }
         else {
             scaleFactor = Math.min(scaleFactor, MAX_SCALE);
             scale_increment = 512;
-            exp_delta = twoToTheDoubleScaleUp;
+            exp_delta = 0x1p512;
         }
 
         // Calculate (scaleFactor % +/-512), 512 = 2^9, using
@@ -3420,10 +3420,6 @@ public static float scalb(float f, int scaleFactor) {
         return (float)((double)f*powerOfTwoD(scaleFactor));
     }
 
-    // Constants used in scalb
-    static double twoToTheDoubleScaleUp = powerOfTwoD(512);
-    static double twoToTheDoubleScaleDown = powerOfTwoD(-512);
-
     /**
      * Returns a floating-point power of two in the normal range.
      */