Add a missing instruction to the ia32 disassembler.

BUG=
R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/23451024

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16667 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/ia32/disasm-ia32.cc

@@ -698,6 +698,7 @@ int DisassemblerIA32::MemoryFPUInstruction(int escape_opcode,
   switch (escape_opcode) {
     case 0xD9: switch (regop) {
         case 0: mnem = "fld_s"; break;
+        case 2: mnem = "fst_s"; break;
         case 3: mnem = "fstp_s"; break;
         case 7: mnem = "fstcw"; break;
         default: UnimplementedInstruction();