X87: [wasm] Int64Lowering of I64ShrU and I64ShrS on ia32.

src/x87/disasm-x87.cc

Index: src/x87/disasm-x87.cc
diff --git a/src/x87/disasm-x87.cc b/src/x87/disasm-x87.cc
index 6fed8bfe28b7db3f2fffb08d6f92258229ead789..26e1b9b187a32461023d658cda3d6fc94d5d5b37 100644
--- a/src/x87/disasm-x87.cc
+++ b/src/x87/disasm-x87.cc
@@ -1150,7 +1150,8 @@ int DisassemblerX87::InstructionDecode(v8::internal::Vector<char> out_buffer,
             data += SetCC(data);
           } else if ((f0byte & 0xF0) == 0x40) {
             data += CMov(data);
-          } else if (f0byte == 0xA4) {
+          } else if (f0byte == 0xA4 || f0byte == 0xAC) {
+            // shld, shrd
             data += 2;
             AppendToBuffer("%s ", f0mnem);
             int mod, regop, rm;
@@ -1160,7 +1161,7 @@ int DisassemblerX87::InstructionDecode(v8::internal::Vector<char> out_buffer,
             AppendToBuffer("%s,%s,%d", NameOfCPURegister(rm),
                            NameOfCPURegister(regop), static_cast<int>(imm8));
           } else if (f0byte == 0xAB || f0byte == 0xA5 || f0byte == 0xAD) {
-            // shrd, shld_cl, bts
+            // shrd_cl, shld_cl, bts
             data += 2;
             AppendToBuffer("%s ", f0mnem);
             int mod, regop, rm;