Add a missing instruction to the ia32 disassembler.

src/ia32/disasm-ia32.cc

 // Copyright 2011 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 680 matching lines @@
 }
 
 int DisassemblerIA32::MemoryFPUInstruction(int escape_opcode,
                                            int modrm_byte,
                                            byte* modrm_start) {
   const char* mnem = "?";
   int regop = (modrm_byte >> 3) & 0x7;  // reg/op field of modrm byte.
   switch (escape_opcode) {
     case 0xD9: switch (regop) {
         case 0: mnem = "fld_s"; break;
+        case 2: mnem = "fstp_s"; break;

[Toon Verwaest, 2013/09/11 11:51:42]

This one is not popping; so fst_s.

         case 3: mnem = "fstp_s"; break;
         case 7: mnem = "fstcw"; break;
         default: UnimplementedInstruction();
       }
       break;
 
     case 0xDB: switch (regop) {
         case 0: mnem = "fild_s"; break;
         case 1: mnem = "fisttp_s"; break;
         case 2: mnem = "fist_s"; break;
@@ skipping 1016 matching lines @@
       fprintf(f, "  ");
     }
     fprintf(f, "  %s\n", buffer.start());
   }
 }
 
 
 }  // namespace disasm
 
 #endif  // V8_TARGET_ARCH_IA32