costModel.cpp

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/* Copyright 1994 - 1996 LongView Technologies L.L.C. $Revision: 1.2 $ */
/* Copyright (c) 2006, Sun Microsystems, Inc.
All rights reserved.

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    * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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          disclaimer in the documentation and/or other materials provided with the distribution.
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          from this software without specific prior written permission.

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# include "incls/_precompiled.incl"
# ifdef DELTA_COMPILER
# include "incls/_costModel.cpp.incl"


int CostModel::_cost[Bytecodes::number_of_codes];


void CostModel::set_default_costs() {
  // default cost for most codes
  set_cost_for_all(1);

  // specialize for individual code types
  set_cost_for_type(Bytecodes::new_closure,     3);
  set_cost_for_type(Bytecodes::new_context,     3);
  set_cost_for_type(Bytecodes::message_send,    5);
  set_cost_for_type(Bytecodes::nonlocal_return, 3);
  set_cost_for_type(Bytecodes::primitive_call,  5);
  set_cost_for_type(Bytecodes::dll_call,        5);

  // specialize for individual send types
  set_cost_for_send(Bytecodes::predicted_send,  2);
  set_cost_for_send(Bytecodes::accessor_send,   2);
}


void CostModel::set_cost_for_all(int cost) {
  for (int i = 0; i < Bytecodes::number_of_codes; i++) {
    _cost[i] = cost;
  }
}


void CostModel::set_cost_for_code(Bytecodes::Code code, int cost) {
  assert(Bytecodes::is_defined(code), "undefined bytecode");
  _cost[code] = cost;
}


void CostModel::set_cost_for_type(Bytecodes::CodeType type, int cost) {
  for (int i = 0; i < Bytecodes::number_of_codes; i++) {
    if (Bytecodes::code_type(Bytecodes::Code(i)) == type) {
      _cost[i] = cost;
    }
  }
}


void CostModel::set_cost_for_send(Bytecodes::SendType type, int cost) {
  for (int i = 0; i < Bytecodes::number_of_codes; i++) {
    if (Bytecodes::send_type(Bytecodes::Code(i)) == type) {
      _cost[i] = cost;
    }
  }
}

  
void CostModel::print() {
  std->print("%40s: %s\n", "Bytecode", "Cost");
  for (int i = 0; i < Bytecodes::number_of_codes; i++) {
    Bytecodes::Code code = Bytecodes::Code(i);
    if (Bytecodes::is_defined(code)) {
      std->print("%40s: %d\n", Bytecodes::name(code), cost_for(code));
    }
  }
}


void costModel_init() {
  CostModel::set_default_costs();
}


# endif

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