--- old/src/hotspot/share/classfile/vmSymbols.cpp	2020-08-18 21:34:32.711240818 +0300
+++ new/src/hotspot/share/classfile/vmSymbols.cpp	2020-08-18 21:34:32.539259914 +0300
@@ -815,6 +815,10 @@
   case vmIntrinsics::_isWhitespace:
     if (!UseCharacterCompareIntrinsics) return true;
     break;
+  case vmIntrinsics::_dsignum:
+  case vmIntrinsics::_fsignum:
+    if (!InlineMathNatives || !UseSignumIntrinsic) return true;
+    break;
 #endif // COMPILER2
   default:
     return false;