text: /*
   * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
   * Copyright (C) 2008 Cameron Zwarich <cwzwarich@uwaterloo.ca>
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1.  Redistributions of source code must retain the above copyright
   *     notice, this list of conditions and the following disclaimer.
   * 2.  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 with the distribution.
   * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
   *     its contributors may be used to endorse or promote products derived
   *     from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
   * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
   * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef Opcode_h
  #define Opcode_h
  
  #include <algorithm>
  #include <string.h>
  
  #include <wtf/Assertions.h>
  
  namespace JSC {
  
      #define FOR_EACH_OPCODE_ID(macro) \
          macro(op_enter, 1) \
          macro(op_enter_with_activation, 2) \
          macro(op_init_arguments, 1) \
          macro(op_create_arguments, 1) \
          macro(op_convert_this, 2) \
          \
          macro(op_new_object, 2) \
          macro(op_new_array, 4) \
          macro(op_new_regexp, 3) \
          macro(op_mov, 3) \
          \
          macro(op_not, 3) \
          macro(op_eq, 4) \
          macro(op_eq_null, 3) \
          macro(op_neq, 4) \
          macro(op_neq_null, 3) \
          macro(op_stricteq, 4) \
          macro(op_nstricteq, 4) \
          macro(op_less, 4) \
          macro(op_lesseq, 4) \
          \
          macro(op_pre_inc, 2) \
          macro(op_pre_dec, 2) \
          macro(op_post_inc, 3) \
          macro(op_post_dec, 3) \
          macro(op_to_jsnumber, 3) \
          macro(op_negate, 3) \
          macro(op_add, 5) \
          macro(op_mul, 5) \
          macro(op_div, 5) \
          macro(op_mod, 4) \
          macro(op_sub, 5) \
          \
          macro(op_lshift, 4) \
          macro(op_rshift, 4) \
          macro(op_urshift, 4) \
          macro(op_bitand, 5) \
          macro(op_bitxor, 5) \
          macro(op_bitor, 5) \
          macro(op_bitnot, 3) \
          \
          macro(op_instanceof, 5) \
          macro(op_typeof, 3) \
          macro(op_is_undefined, 3) \
          macro(op_is_boolean, 3) \
          macro(op_is_number, 3) \
          macro(op_is_string, 3) \
          macro(op_is_object, 3) \
          macro(op_is_function, 3) \
          macro(op_in, 4) \
          \
          macro(op_resolve, 3) \
          macro(op_resolve_skip, 4) \
          macro(op_resolve_global, 6) \
          macro(op_get_scoped_var, 4) \
          macro(op_put_scoped_var, 4) \
          macro(op_get_global_var, 4) \
          macro(op_put_global_var, 4) \
          macro(op_resolve_base, 3) \
          macro(op_resolve_with_base, 4) \
          macro(op_get_by_id, 8) \
          macro(op_get_by_id_self, 8) \
          macro(op_get_by_id_self_list, 8) \
          macro(op_get_by_id_proto, 8) \
          macro(op_get_by_id_proto_list, 8) \
          macro(op_get_by_id_chain, 8) \
          macro(op_get_by_id_generic, 8) \
          macro(op_get_array_length, 8) \
          macro(op_get_string_length, 8) \
          macro(op_put_by_id, 8) \
          macro(op_put_by_id_transition, 8) \
          macro(op_put_by_id_replace, 8) \
          macro(op_put_by_id_generic, 8) \
          macro(op_del_by_id, 4) \
          macro(op_get_by_val, 4) \
          macro(op_get_by_pname, 7) \
          macro(op_put_by_val, 4) \
          macro(op_del_by_val, 4) \
          macro(op_put_by_index, 4) \
          macro(op_put_getter, 4) \
          macro(op_put_setter, 4) \
          \
          macro(op_jmp, 2) \
          macro(op_jtrue, 3) \
          macro(op_jfalse, 3) \
          macro(op_jeq_null, 3) \
          macro(op_jneq_null, 3) \
          macro(op_jneq_ptr, 4) \
          macro(op_jnless, 4) \
          macro(op_jnlesseq, 4) \
          macro(op_jless, 4) \
          macro(op_jmp_scopes, 3) \
          macro(op_loop, 2) \
          macro(op_loop_if_true, 3) \
          macro(op_loop_if_false, 3) \
          macro(op_loop_if_less, 4) \
          macro(op_loop_if_lesseq, 4) \
          macro(op_switch_imm, 4) \
          macro(op_switch_char, 4) \
          macro(op_switch_string, 4) \
          \
          macro(op_new_func, 3) \
          macro(op_new_func_exp, 3) \
          macro(op_call, 5) \
          macro(op_call_eval, 5) \
          macro(op_call_varargs, 5) \
          macro(op_load_varargs, 3) \
          macro(op_tear_off_activation, 2) \
          macro(op_tear_off_arguments, 1) \
          macro(op_ret, 2) \
          macro(op_method_check, 1) \
          \
          macro(op_construct, 7) \
          macro(op_construct_verify, 3) \
          macro(op_strcat, 4) \
          macro(op_to_primitive, 3) \
          \
          macro(op_get_pnames, 6) \
          macro(op_next_pname, 7) \
          \
          macro(op_push_scope, 2) \
          macro(op_pop_scope, 1) \
          macro(op_push_new_scope, 4) \
          \
          macro(op_catch, 2) \
          macro(op_throw, 2) \
          macro(op_new_error, 4) \
          \
          macro(op_jsr, 3) \
          macro(op_sret, 2) \
          \
          macro(op_debug, 4) \
          macro(op_profile_will_call, 2) \
          macro(op_profile_did_call, 2) \
          \
          macro(op_end, 2) // end must be the last opcode in the list
  
      #define OPCODE_ID_ENUM(opcode, length) opcode,
          typedef enum { FOR_EACH_OPCODE_ID(OPCODE_ID_ENUM) } OpcodeID;
      #undef OPCODE_ID_ENUM
  
      const int numOpcodeIDs = op_end + 1;
  
      #define OPCODE_ID_LENGTHS(id, length) const int id##_length = length;
           FOR_EACH_OPCODE_ID(OPCODE_ID_LENGTHS);
      #undef OPCODE_ID_LENGTHS
      
      #define OPCODE_LENGTH(opcode) opcode##_length
  
      #define OPCODE_ID_LENGTH_MAP(opcode, length) length,
          const int opcodeLengths[numOpcodeIDs] = { FOR_EACH_OPCODE_ID(OPCODE_ID_LENGTH_MAP) };
      #undef OPCODE_ID_LENGTH_MAP
  
      #define VERIFY_OPCODE_ID(id, size) COMPILE_ASSERT(id <= op_end, ASSERT_THAT_JS_OPCODE_IDS_ARE_VALID);
          FOR_EACH_OPCODE_ID(VERIFY_OPCODE_ID);
      #undef VERIFY_OPCODE_ID
  
  #if HAVE(COMPUTED_GOTO)
  #if COMPILER(RVCT) || COMPILER(INTEL)
      typedef void* Opcode;
  #else
      typedef const void* Opcode;
  #endif
  #else
      typedef OpcodeID Opcode;
  #endif
  
  #if ENABLE(OPCODE_SAMPLING) || ENABLE(CODEBLOCK_SAMPLING) || ENABLE(OPCODE_STATS)
  
  #define PADDING_STRING "                                "
  #define PADDING_STRING_LENGTH static_cast<unsigned>(strlen(PADDING_STRING))
  
      extern const char* const opcodeNames[];
  
      inline const char* padOpcodeName(OpcodeID op, unsigned width)
      {
          unsigned pad = width - strlen(opcodeNames[op]);
          pad = std::min(pad, PADDING_STRING_LENGTH);
          return PADDING_STRING + PADDING_STRING_LENGTH - pad;
      }
  
  #undef PADDING_STRING_LENGTH
  #undef PADDING_STRING
  
  #endif
  
  #if ENABLE(OPCODE_STATS)
  
      struct OpcodeStats {
          OpcodeStats();
          ~OpcodeStats();
          static long long opcodeCounts[numOpcodeIDs];
          static long long opcodePairCounts[numOpcodeIDs][numOpcodeIDs];
          static int lastOpcode;
  
          static void recordInstruction(int opcode);
          static void resetLastInstruction();
      };
  
  #endif
  
  } // namespace JSC
  
  #endif // Opcode_h
  