Copy of changelist from issue 16450. Converts compare operation...

src/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 47 matching lines @@
   {0x3B, "cmp", REG_OPER_OP_ORDER},
   {0x8D, "lea", REG_OPER_OP_ORDER},
   {0x09, "or", OPER_REG_OP_ORDER},
   {0x0B, "or", REG_OPER_OP_ORDER},
   {0x1B, "sbb", REG_OPER_OP_ORDER},
   {0x29, "sub", OPER_REG_OP_ORDER},
   {0x2B, "sub", REG_OPER_OP_ORDER},
   {0x85, "test", REG_OPER_OP_ORDER},
   {0x31, "xor", OPER_REG_OP_ORDER},
   {0x33, "xor", REG_OPER_OP_ORDER},
+  {0x87, "xchg", REG_OPER_OP_ORDER},
   {0x8A, "mov_b", REG_OPER_OP_ORDER},
   {0x8B, "mov", REG_OPER_OP_ORDER},
   {-1, "", UNSET_OP_ORDER}
 };
 
 
 static ByteMnemonic zero_operands_instr[] = {
   {0xC3, "ret", UNSET_OP_ORDER},
   {0xC9, "leave", UNSET_OP_ORDER},
   {0x90, "nop", UNSET_OP_ORDER},
@@ skipping 92 matching lines @@
 void InstructionTable::Init() {
   CopyTable(two_operands_instr, TWO_OPERANDS_INSTR);
   CopyTable(zero_operands_instr, ZERO_OPERANDS_INSTR);
   CopyTable(call_jump_instr, CALL_JUMP_INSTR);
   CopyTable(short_immediate_instr, SHORT_IMMEDIATE_INSTR);
   AddJumpConditionalShort();
   SetTableRange(REGISTER_INSTR, 0x40, 0x47, "inc");
   SetTableRange(REGISTER_INSTR, 0x48, 0x4F, "dec");
   SetTableRange(REGISTER_INSTR, 0x50, 0x57, "push");
   SetTableRange(REGISTER_INSTR, 0x58, 0x5F, "pop");
+  SetTableRange(REGISTER_INSTR, 0x91, 0x97, "xchg eax,");  // 0x90 is nop.
   SetTableRange(MOVE_REG_INSTR, 0xB8, 0xBF, "mov");
 }
 
 
 void InstructionTable::CopyTable(ByteMnemonic bm[], InstructionType type) {
   for (int i = 0; bm[i].b >= 0; i++) {
     InstructionDesc* id = &instructions_[bm[i].b];
     id->mnem = bm[i].mnem;
     id->op_order_ = bm[i].op_order_;
     assert(id->type == NO_INSTR);  // Information already entered
@@ skipping 939 matching lines @@
     }
     for (int i = 6 - (pc - prev_pc); i >= 0; i--) {
       fprintf(f, "  ");
     }
     fprintf(f, "  %s\n", buffer.start());
   }
 }
 
 
 }  // namespace disasm