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

*** 1975,1984 ****
--- 1975,1985 ----
       * @param d the floating-point value whose signum is to be returned
       * @return the signum function of the argument
       * @author Joseph D. Darcy
       * @since 1.5
       */
+     @HotSpotIntrinsicCandidate
      public static double signum(double d) {
          return (d == 0.0 || Double.isNaN(d))?d:copySign(1.0, d);
      }
  
      /**
*** 1996,2005 ****
--- 1997,2007 ----
       * @param f the floating-point value whose signum is to be returned
       * @return the signum function of the argument
       * @author Joseph D. Darcy
       * @since 1.5
       */
+     @HotSpotIntrinsicCandidate
      public static float signum(float f) {
          return (f == 0.0f || Float.isNaN(f))?f:copySign(1.0f, f);
      }
  
      /**