diff --git a/src/hotspot/share/opto/superword.cpp b/src/hotspot/share/opto/superword.cpp
index 510cb1b51de..2316b0bb49a 100644
--- a/src/hotspot/share/opto/superword.cpp
+++ b/src/hotspot/share/opto/superword.cpp
@@ -2597,6 +2597,9 @@ static bool can_subword_truncate(Node* in, const Type* type) {
   case Op_IsFiniteD:
   case Op_IsInfiniteF:
   case Op_IsInfiniteD:
+  case Op_CmpLTMask:
+  case Op_RoundF:
+  case Op_RoundD:
   case Op_ExtractS:
   case Op_ExtractC:
   case Op_ExtractB:
diff --git a/test/hotspot/jtreg/compiler/lib/ir_framework/IRNode.java b/test/hotspot/jtreg/compiler/lib/ir_framework/IRNode.java
index 1b843e27587..d699ba1acd8 100644
--- a/test/hotspot/jtreg/compiler/lib/ir_framework/IRNode.java
+++ b/test/hotspot/jtreg/compiler/lib/ir_framework/IRNode.java
@@ -585,6 +585,21 @@ public class IRNode {
         beforeMatchingNameRegex(CMP_P, "CmpP");
     }
 
+    public static final String CMP_LT_MASK = PREFIX + "CMP_LT_MASK" + POSTFIX;
+    static {
+        beforeMatchingNameRegex(CMP_LT_MASK, "CmpLTMask");
+    }
+
+    public static final String ROUND_F = PREFIX + "ROUND_F" + POSTFIX;
+    static {
+        beforeMatchingNameRegex(ROUND_F, "RoundF");
+    }
+
+    public static final String ROUND_D = PREFIX + "ROUND_D" + POSTFIX;
+    static {
+        beforeMatchingNameRegex(ROUND_D, "RoundD");
+    }
+
     public static final String COMPRESS_BITS = PREFIX + "COMPRESS_BITS" + POSTFIX;
     static {
         beforeMatchingNameRegex(COMPRESS_BITS, "CompressBits");
diff --git a/test/hotspot/jtreg/compiler/vectorization/TestSubwordTruncation.java b/test/hotspot/jtreg/compiler/vectorization/TestSubwordTruncation.java
index 5985367b265..43861c789ba 100644
--- a/test/hotspot/jtreg/compiler/vectorization/TestSubwordTruncation.java
+++ b/test/hotspot/jtreg/compiler/vectorization/TestSubwordTruncation.java
@@ -389,6 +389,45 @@ public class TestSubwordTruncation {
         }
     }
 
+    @Test
+    @IR(counts = { IRNode.CMP_LT_MASK, ">0" })
+    @Arguments(setup = "setupByteArray")
+    public Object[] testCmpLTMask(byte[] in) {
+        char[] res = new char[SIZE];
+
+        for (int i = 0; i < SIZE; i++) {
+            res[i] = (char) (in[i] >= 0 ? in[i] : 256 + in[i]);
+        }
+
+        return new Object[] { in, res };
+    }
+
+    @Test
+    @IR(counts = { IRNode.ROUND_F, ">0" })
+    @Arguments(setup = "setupByteArray")
+    public Object[] testRoundF(byte[] in) {
+        short[] res = new short[SIZE];
+
+        for (int i = 0; i < SIZE; i++) {
+            res[i] = (short) Math.round(in[i] * 10.F);
+        }
+
+        return new Object[] { in, res };
+    }
+
+    @Test
+    @IR(counts = { IRNode.ROUND_D, ">0" })
+    @Arguments(setup = "setupByteArray")
+    public Object[] testRoundD(byte[] in) {
+        short[] res = new short[SIZE];
+
+        for (int i = 0; i < SIZE; i++) {
+            res[i] = (short) Math.round(in[i] * 10.0);
+        }
+
+        return new Object[] { in, res };
+    }
+
     public static void main(String[] args) {
         TestFramework.run();
     }