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

rev 54087 : 8251525: AARCH64: Faster Math.signum(fp)
Reviewed-by: aph, vlivanov, adinn

*** 1888,1897 ****
--- 1888,1898 ----
       * @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);
      }
  
      /**
*** 1909,1918 ****
--- 1910,1920 ----
       * @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);
      }
  
      /**
*** 2129,2138 ****
--- 2131,2141 ----
       * @param sign   the parameter providing the sign of the result
       * @return a value with the magnitude of {@code magnitude}
       * and the sign of {@code sign}.
       * @since 1.6
       */
+     @HotSpotIntrinsicCandidate
      public static double copySign(double magnitude, double sign) {
          return Double.longBitsToDouble((Double.doubleToRawLongBits(sign) &
                                          (DoubleConsts.SIGN_BIT_MASK)) |
                                         (Double.doubleToRawLongBits(magnitude) &
                                          (DoubleConsts.EXP_BIT_MASK |
*** 2152,2161 ****
--- 2155,2165 ----
       * @param sign   the parameter providing the sign of the result
       * @return a value with the magnitude of {@code magnitude}
       * and the sign of {@code sign}.
       * @since 1.6
       */
+     @HotSpotIntrinsicCandidate
      public static float copySign(float magnitude, float sign) {
          return Float.intBitsToFloat((Float.floatToRawIntBits(sign) &
                                       (FloatConsts.SIGN_BIT_MASK)) |
                                      (Float.floatToRawIntBits(magnitude) &
                                       (FloatConsts.EXP_BIT_MASK |