$ CONF=linux-x86-server-fastdebug make clean run-test TEST=jdk/incubator/vector/

test Short256VectorTests.divShort256VectorTestsMasked(short[-i * 5], short[i + 1], mask[i % 2]): success
test Short256VectorTests.divShort256VectorTestsMasked(short[-i * 5], short[cornerCaseValue(i)], mask[i % 2]): failure
java.lang.ArithmeticException: zero vector lane in dividend [32767, -32768, -32768, 32767, 1, 32767, -32768, -32768, 32767, 0, 32767, -32768, -32768, 32767, 1, 32767]
at jdk.incubator.vector/jdk.incubator.vector.AbstractVector.divZeroException(AbstractVector.java:494)
at jdk.incubator.vector/jdk.incubator.vector.ShortVector.lanewiseTemplate(ShortVector.java:622)
at jdk.incubator.vector/jdk.incubator.vector.Short256Vector.lanewise(Short256Vector.java:279)
at jdk.incubator.vector/jdk.incubator.vector.Short256Vector.lanewise(Short256Vector.java:41)
at jdk.incubator.vector/jdk.incubator.vector.ShortVector.lanewise(ShortVector.java:684)

The failure goes away with -XX:-Inline or -XX:DisableIntrinsics=_VectorCompare.

This also helps:

diff --git a/src/hotspot/cpu/x86/x86.ad b/src/hotspot/cpu/x86/x86.ad
index 1ea22eee800..05930a6a171 100644
--- a/src/hotspot/cpu/x86/x86.ad
+++ b/src/hotspot/cpu/x86/x86.ad
@@ -1815,7 +1815,7 @@ const bool Matcher::match_rule_supported_vector(int opcode, int vlen, BasicType
       }
       break;
     case Op_VectorMaskCmp:
- if (vlen < 2 || size_in_bits < 32) {
+ if (!is_LP64 || vlen < 2 || size_in_bits < 32) {
         return false;
       }
       break;