S390: Check memory offset when emitting vstbr

Add a similar check used in vlbr to make sure offset is
a 12 bit unsigned integer.

Change-Id: I12ef8734a7223fa375a31e55ecc81d1175de17c0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2977272Reviewed-by: Junliang Yan <junyan@redhat.com>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/master@{#75303}

src/codegen/s390/macro-assembler-s390.cc

@@ -3915,7 +3915,9 @@ void TurboAssembler::StoreF32LE(DoubleRegister src, const MemOperand& opnd,
 
 void TurboAssembler::StoreV128LE(Simd128Register src, const MemOperand& mem,
                                  Register scratch1, Register scratch2) {
-  if (CpuFeatures::IsSupported(VECTOR_ENHANCE_FACILITY_2)) {
+  bool use_vstbr = CpuFeatures::IsSupported(VECTOR_ENHANCE_FACILITY_2) &&
+                   is_uint12(mem.offset());
+  if (use_vstbr) {
     vstbr(src, mem, Condition(4));
   } else {
     vlgv(scratch1, src, MemOperand(r0, 1), Condition(3));