--- old/src/jdk.incubator.vector/share/classes/jdk/incubator/vector/Byte128Vector.java	2018-04-20 10:39:30.844813617 -0700
+++ new/src/jdk.incubator.vector/share/classes/jdk/incubator/vector/Byte128Vector.java	2018-04-20 10:39:30.704813618 -0700
@@ -443,6 +443,15 @@
             v -> (long) v.rOp((byte) -1, (i, a, b) -> (byte) (a & b)));
     }
 
+    @Override
+    @ForceInline
+    public byte subAll() {
+        return (byte) VectorIntrinsics.reductionCoerced(
+            VECTOR_OP_SUB, Byte128Vector.class, byte.class, LENGTH,
+            this,
+            v -> (long) v.rOp((byte) 0, (i, a, b) -> (byte) (a - b)));
+    }
+
     // Memory operations
 
     @Override