Improve the decoding of the VEX encoded instructions.

syzygy/core/disassembler_util_unittest.cc

Index: syzygy/core/disassembler_util_unittest.cc
diff --git a/syzygy/core/disassembler_util_unittest.cc b/syzygy/core/disassembler_util_unittest.cc
index e422c9b8ce914da76358d1af7e4f4a4299dc3342..76b11dec82d925e8cf848128cf623ac170d57d56 100644
--- a/syzygy/core/disassembler_util_unittest.cc
+++ b/syzygy/core/disassembler_util_unittest.cc
@@ -126,12 +126,13 @@ const std::vector<std::vector<uint8_t>> kVexInstructions = {
     {0xC4, 0xE2, 0x7D, 0x5A, 0x45, 0xD0},        // vbroadcasti128
     {0xC4, 0xE3, 0x7D, 0x38, 0x2C, 0x0F, 0x01},  // vinserti128
     {0xC4, 0xE2, 0x79, 0x78, 0xC0},              // vpbroadcastb
-    {0xC4, 0xE2, 0x7D, 0x58, 0x40, 0x04},        // vpbroadcastd
+    {0xC4, 0xE2, 0x79, 0x78, 0x40, 0x04},        // vpbroadcastb (2 operands)
+    {0xC4, 0xE2, 0x7D, 0x58, 0xC0},              // vpbroadcastd
+    {0xC4, 0xE2, 0x7D, 0x58, 0x40, 0x04},        // vpbroadcastd (2 operands)
     {0xC4, 0xE2, 0x7D, 0x18, 0xC0},              // vbroadcastss
     {0xC4, 0xE3, 0x7D, 0x39, 0xC8, 0x01},        // vextracti128
     {0xC4, 0xE2, 0x7D, 0x90, 0x1C, 0x88},        // vpgatherdd
     {0xC4, 0xE2, 0x7D, 0x8C, 0x00},              // vpmaskmovd
-    {0xC4, 0xE2, 0x7D, 0x8E, 0x90},              // vpmaskmovd
 
     // F16C instructions.
     {0xC4, 0xE3, 0x79, 0x1D, 0xC8, 0x00},  // vcvtps2ph