src/mem/slicc/ast/CopyHeadStatementAST.py

   1 # Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
   2 # Copyright (c) 2009 The Hewlett-Packard Development Company
   3 # All rights reserved.
   4 #
   5 # Redistribution and use in source and binary forms, with or without
   6 # modification, are permitted provided that the following conditions are
   7 # met: redistributions of source code must retain the above copyright
   8 # notice, this list of conditions and the following disclaimer;
   9 # redistributions in binary form must reproduce the above copyright
  10 # notice, this list of conditions and the following disclaimer in the
  11 # documentation and/or other materials provided with the distribution;
  12 # neither the name of the copyright holders nor the names of its
  13 # contributors may be used to endorse or promote products derived from
  14 # this software without specific prior written permission.
  15 #
  16 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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  19 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  20 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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  26 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27
  28 from slicc.ast.StatementAST import StatementAST
  29
  30 class CopyHeadStatementAST(StatementAST):
  31     def __init__(self, slicc, in_queue, out_queue, pairs):
  32         super(CopyHeadStatementAST, self).__init__(slicc, pairs)
  33
  34         self.in_queue = in_queue
  35         self.out_queue_ptr = out_queue
  36
  37     def __repr__(self):
  38         return "[CopyHeadStatementAst: %r %r]" % (self.in_queue,
  39                                                   self.out_queue)
  40
  41     def generate(self, code, return_type):
  42         self.in_queue.assertType("InPort")
  43         self.out_queue.assertType("OutPort")
  44
  45         out_code = self.out_queue.var.code
  46         in_code = self.in_queue.var.code
  47         latency = self.get("latency", "COPY_HEAD_LATENCY")
  48         code("$out_code.enqueue($in_code.getMsgPtrCopy(), $latency);")
  49
  50     def findResources(self, resources):
  51         var = self.out_queue.var
  52         resources[var] = str(int(resources.get(var, "0")) + 1)