text: /*
   * opcode module - potentially shared between dis and other modules which
   * operate on bytecodes (e.g. peephole optimizers).
   */
  
  var dis = {
      CO_GENERATOR: 32,  // flag for "this code uses yield"
  
      hasconst: {},
      hasname: {},
      hasjrel: {},
      hasjabs: {},
      haslocal: {},
      hascompare: {},
      hasfree: {},
      hasnargs: {},
  
      opmap: {},
      opname: [],
  
      unary_ops: {},
      binary_ops: {},
      inplace_ops: {}
      // slice_ops: {},
  }
  
  function def_op(name, op) {
      dis.opname[op] = name
      dis.opmap[name] = op
  }
  
  function def_unary_op(name, op) {
      def_op(name, op)
      dis.unary_ops[op] = op
  }
  
  function def_binary_op(name, op) {
      def_op(name, op)
      dis.binary_ops[op] = op
  }
  
  function def_inplace_op(name, op) {
      def_op(name, op)
      dis.inplace_ops[op] = op
  }
  
  // function def_slice_op(name, op) {
  //     def_op(name, op);
  //     slice_ops[op] = op;
  // }
  
  function name_op(name, op) {
      def_op(name, op)
      dis.hasname[op] = op
  }
  
  function jrel_op(name, op) {
      def_op(name, op)
      dis.hasjrel[op] = op
  }
  
  function jabs_op(name, op) {
      def_op(name, op)
      dis.hasjabs[op] = op
  }
  
  // Prime the opname list with all possible opnames
  for (var op = 0; op < 256; op++) {
      dis.opname.push('<' + op + '>')
  }
  
  // Register the known opnames
  def_op('POP_TOP', 1)
  def_op('ROT_TWO', 2)
  def_op('ROT_THREE', 3)
  def_op('DUP_TOP', 4)
  def_op('DUP_TOP_TWO', 5)
  
  // Introduced in Python 3.8
  def_op('ROT_FOUR', 6)
  
  def_op('NOP', 9)
  dis.NOP = 9 // TODO why does this require special handling?
  def_unary_op('UNARY_POSITIVE', 10)
  def_unary_op('UNARY_NEGATIVE', 11)
  def_unary_op('UNARY_NOT', 12)
  
  def_unary_op('UNARY_INVERT', 15)
  
  // Introduced in Python 3.5
  def_binary_op('BINARY_MATRIX_MULTIPLY', 16)
  def_inplace_op('INPLACE_MATRIX_MULTIPLY', 17)
  
  def_binary_op('BINARY_POWER', 19)
  def_binary_op('BINARY_MULTIPLY', 20)
  
  def_binary_op('BINARY_MODULO', 22)
  def_binary_op('BINARY_ADD', 23)
  def_binary_op('BINARY_SUBTRACT', 24)
  def_binary_op('BINARY_SUBSCR', 25)
  def_binary_op('BINARY_FLOOR_DIVIDE', 26)
  def_binary_op('BINARY_TRUE_DIVIDE', 27)
  def_inplace_op('INPLACE_FLOOR_DIVIDE', 28)
  def_inplace_op('INPLACE_TRUE_DIVIDE', 29)
  
  // Introduced in Python 3.5
  def_op('GET_AITER', 50)
  def_op('GET_ANEXT', 51)
  def_op('BEFORE_ASYNC_WITH', 52)
  
  // Introduced in Python 3.8
  def_op('BEGIN_FINALLY', 53)
  def_op('END_ASYNC_FOR', 54)
  
  def_inplace_op('INPLACE_ADD', 55)
  def_inplace_op('INPLACE_SUBTRACT', 56)
  def_inplace_op('INPLACE_MULTIPLY', 57)
  
  def_inplace_op('INPLACE_MODULO', 59)
  def_op('STORE_SUBSCR', 60)
  def_op('DELETE_SUBSCR', 61)
  def_binary_op('BINARY_LSHIFT', 62)
  def_binary_op('BINARY_RSHIFT', 63)
  def_binary_op('BINARY_AND', 64)
  def_binary_op('BINARY_XOR', 65)
  def_binary_op('BINARY_OR', 66)
  def_inplace_op('INPLACE_POWER', 67)
  def_op('GET_ITER', 68)
  
  // Introduced in Python 3.5
  def_op('GET_YIELD_FROM_ITER', 69)
  
  def_op('PRINT_EXPR', 70)
  def_op('LOAD_BUILD_CLASS', 71)
  def_op('YIELD_FROM', 72)
  
  // Introduced in Python 3.5
  def_op('GET_AWAITABLE', 73)
  
  def_inplace_op('INPLACE_LSHIFT', 75)
  def_inplace_op('INPLACE_RSHIFT', 76)
  def_inplace_op('INPLACE_AND', 77)
  def_inplace_op('INPLACE_XOR', 78)
  def_inplace_op('INPLACE_OR', 79)
  def_op('BREAK_LOOP', 80)
  def_op('WITH_CLEANUP', 81)
  
  // Introduced in Python 3.5
  def_op('WITH_CLEANUP_FINISH', 82)
  
  def_op('RETURN_VALUE', 83)
  def_op('IMPORT_STAR', 84)
  
  // Introduced in Python 3.6
  def_op('SETUP_ANNOTATIONS', 85)
  
  def_op('YIELD_VALUE', 86)
  def_op('POP_BLOCK', 87)
  def_op('END_FINALLY', 88)
  def_op('POP_EXCEPT', 89)
  
  dis.HAVE_ARGUMENT = 90          // Opcodes from here have an argument:
  
  name_op('STORE_NAME', 90)       // Index in name list
  name_op('DELETE_NAME', 91)      // ""
  def_op('UNPACK_SEQUENCE', 92)   // Number of tuple items
  jrel_op('FOR_ITER', 93)
  def_op('UNPACK_EX', 94)
  name_op('STORE_ATTR', 95)       // Index in name list
  name_op('DELETE_ATTR', 96)      // ""
  name_op('STORE_GLOBAL', 97)     // ""
  name_op('DELETE_GLOBAL', 98)    // ""
  def_op('LOAD_CONST', 100)       // Index in const list
  dis.hasconst[100] = 100
  name_op('LOAD_NAME', 101)       // Index in name list
  def_op('BUILD_TUPLE', 102)      // Number of tuple items
  def_op('BUILD_LIST', 103)       // Number of list items
  def_op('BUILD_SET', 104)        // Number of set items
  def_op('BUILD_MAP', 105)        // Number of dict entries (upto 255)
  name_op('LOAD_ATTR', 106)       // Index in name list
  def_op('COMPARE_OP', 107)       // Comparison operator
  dis.hascompare[107] = 107
  name_op('IMPORT_NAME', 108)     // Index in name list
  name_op('IMPORT_FROM', 109)     // Index in name list
  
  jrel_op('JUMP_FORWARD', 110)    // Number of bytes to skip
  jabs_op('JUMP_IF_FALSE_OR_POP', 111) // Target byte offset from beginning of code
  jabs_op('JUMP_IF_TRUE_OR_POP', 112)  // ""
  jabs_op('JUMP_ABSOLUTE', 113)        // ""
  jabs_op('POP_JUMP_IF_FALSE', 114)    // ""
  jabs_op('POP_JUMP_IF_TRUE', 115)     // ""
  
  name_op('LOAD_GLOBAL', 116)     // Index in name list
  
  jabs_op('CONTINUE_LOOP', 119)   // Target address
  jrel_op('SETUP_LOOP', 120)      // Distance to target address
  jrel_op('SETUP_EXCEPT', 121)    // ""
  jrel_op('SETUP_FINALLY', 122)   // ""
  
  def_op('LOAD_FAST', 124)        // Local variable number
  dis.haslocal[124] = 124
  def_op('STORE_FAST', 125)       // Local variable number
  dis.haslocal[125] = 125
  def_op('DELETE_FAST', 126)      // Local variable number
  dis.haslocal[126] = 126
  
  def_op('RAISE_VARARGS', 130)    // Number of raise arguments (1, 2, or 3);
  def_op('CALL_FUNCTION', 131)    // #args + (#kwargs << 8);
  dis.hasnargs[131] = 131
  def_op('MAKE_FUNCTION', 132)    // Number of args with default values
  def_op('BUILD_SLICE', 133)      // Number of items
  def_op('MAKE_CLOSURE', 134)
  def_op('LOAD_CLOSURE', 135)
  dis.hasfree[135] = 135
  def_op('LOAD_DEREF', 136)
  dis.hasfree[136] = 136
  def_op('STORE_DEREF', 137)
  dis.hasfree[137] = 137
  def_op('DELETE_DEREF', 138)
  dis.hasfree[138] = 138
  
  def_op('CALL_FUNCTION_VAR', 140)     // #args + (#kwargs << 8);
  dis.hasnargs[140] = 140
  def_op('CALL_FUNCTION_KW', 141)      // #args + (#kwargs << 8);
  dis.hasnargs[141] = 141
  def_op('CALL_FUNCTION_VAR_KW', 142)  // #args + (#kwargs << 8);
  dis.hasnargs[142] = 142
  
  jrel_op('SETUP_WITH', 143)
  def_op('EXTENDED_ARG', 144)
  dis.EXTENDED_ARG = 144
  def_op('LIST_APPEND', 145)
  def_op('SET_ADD', 146)
  def_op('MAP_ADD', 147)
  
  def_op('LOAD_CLASSDEREF', 148)
  dis.hasfree[148] = 148
  
  // Introduced in Python 3.5
  def_op('BUILD_LIST_UNPACK', 149)
  def_op('BUILD_MAP_UNPACK', 150)
  def_op('BUILD_MAP_UNPACK_WITH_CALL', 151)
  def_op('BUILD_TUPLE_UNPACK', 152)
  def_op('BUILD_SET_UNPACK', 153)
  def_op('SETUP_ASYNC_WITH', 154)
  def_op('FORMAT_VALUE', 155)
  
  // Introduced in Python 3.6
  def_op('BUILD_CONST_KEY_MAP', 156)
  
  // Introduced in Python 3.7
  def_op('BUILD_STRING', 157)
  def_op('BUILD_TUPLE_UNPACK_WITH_CALL', 158)
  name_op('LOAD_METHOD', 160)
  def_op('CALL_METHOD', 161)
  dis.hasnargs[161] = 161
  
  // Introduced in Python 3.8
  def_op('CALL_FINALLY', 162)
  def_op('POP_FINALLY', 163)
  
  module.exports = dis
  