Add missing x87 instructions fisttp and fst to the disassembler.

src/ia32/disasm-ia32.cc

 // Copyright 2007-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 667 matching lines @@
         case 0: mnem = "fild_s"; break;
         case 1: mnem = "fisttp_s"; break;
         case 2: mnem = "fist_s"; break;
         case 3: mnem = "fistp_s"; break;
         default: UnimplementedInstruction();
       }
       break;
 
     case 0xDD: switch (regop) {
         case 0: mnem = "fld_d"; break;
-        case 2: mnem = "fstp"; break;
+        case 1: mnem = "fisttp_d"; break;
+        case 2: mnem = "fst_d"; break;
         case 3: mnem = "fstp_d"; break;
         default: UnimplementedInstruction();
       }
       break;
 
     case 0xDF: switch (regop) {
         case 5: mnem = "fild_d"; break;
         case 7: mnem = "fistp_d"; break;
         default: UnimplementedInstruction();
       }
@@ skipping 764 matching lines @@
       fprintf(f, "  ");
     }
     fprintf(f, "  %s\n", buffer.start());
   }
 }
 
 
 }  // namespace disasm
 
 #endif  // V8_TARGET_ARCH_IA32