[x64] Verify disassembly of SSE4_2 instructions

R=gdeepti@chromium.org

Bug: v8:12207
Change-Id: I3eafe4b2cf2d37fd4f8a9792fb96bf7b92a4c61b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3208456Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#77292}

test/cctest/test-disasm-x64.cc

@@ -112,19 +112,6 @@ TEST(DisasmX64) {
   __ j(less_equal, &Ljcc);
   __ j(greater, &Ljcc);
 
-#define EMIT_SSE34_INSTR(instruction, notUsed1, notUsed2, notUsed3, notUsed4) \
-  __ instruction(xmm5, xmm1);                                                 \
-  __ instruction(xmm5, Operand(rdx, 4));
-
-  {
-    if (CpuFeatures::IsSupported(SSE4_2)) {
-      CpuFeatureScope scope(&assm, SSE4_2);
-
-      SSE4_2_INSTRUCTION_LIST(EMIT_SSE34_INSTR)
-    }
-  }
-#undef EMIT_SSE34_INSTR
-
   // AVX instruction
   {
     if (CpuFeatures::IsSupported(AVX)) {
@@ -1311,6 +1298,23 @@ UNINITIALIZED_TEST(DisasmX64CheckOutputSSE4_1) {
 #undef COMPARE_SSE4_EXTRACT_INSTR
 }
 
+UNINITIALIZED_TEST(DisasmX64CheckOutputSSE4_2) {
+  if (!CpuFeatures::IsSupported(SSE4_2)) {
+    return;
+  }
+
+  DisassemblerTester t;
+  std::string actual, exp;
+  CpuFeatureScope scope(&t.assm_, SSE4_2);
+
+#define COMPARE_SSE4_2_INSTR(instruction, _, __, ___, ____) \
+  exp = #instruction " xmm5,xmm1";                          \
+  COMPARE_INSTR(exp, instruction(xmm5, xmm1));              \
+  exp = #instruction " xmm5,[rbx+rcx*4+0x2710]";            \
+  COMPARE_INSTR(exp, instruction(xmm5, Operand(rbx, rcx, times_4, 10000)));
+  SSE4_2_INSTRUCTION_LIST(COMPARE_SSE4_2_INSTR)
+}
+
 UNINITIALIZED_TEST(DisasmX64YMMRegister) {
   if (!CpuFeatures::IsSupported(AVX)) return;
   DisassemblerTester t;