src/arch/x86/isa/formats/string.isa

   1 // -*- mode:c++ -*-
   2
   3 // Copyright (c) 2007 The Hewlett-Packard Development Company
   4 // All rights reserved.
   5 //
   6 // The license below extends only to copyright in the software and shall
   7 // not be construed as granting a license to any other intellectual
   8 // property including but not limited to intellectual property relating
   9 // to a hardware implementation of the functionality of the software
  10 // licensed hereunder.  You may use the software subject to the license
  11 // terms below provided that you ensure that this notice is replicated
  12 // unmodified and in its entirety in all distributions of the software,
  13 // modified or unmodified, in source code or in binary form.
  14 //
  15 // Redistribution and use in source and binary forms, with or without
  16 // modification, are permitted provided that the following conditions are
  17 // met: redistributions of source code must retain the above copyright
  18 // notice, this list of conditions and the following disclaimer;
  19 // redistributions in binary form must reproduce the above copyright
  20 // notice, this list of conditions and the following disclaimer in the
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  22 // neither the name of the copyright holders nor the names of its
  23 // contributors may be used to endorse or promote products derived from
  24 // this software without specific prior written permission.
  25 //
  26 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  27 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  28 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  29 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  30 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  31 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  32 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  33 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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  36 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  37 //
  38 // Authors: Gabe Black
  39
  40 //////////////////////////////////////////////////////////////////////////
  41 //
  42 // String Instructions
  43 //
  44 //////////////////////////////////////////////////////////////////////////
  45
  46 def format StringTestInst(*opTypeSet) {{
  47     allBlocks = OutputBlocks()
  48
  49     regBlocks = specializeInst(Name, list(opTypeSet), EmulEnv())
  50     eBlocks = specializeInst(Name + "_E", list(opTypeSet), EmulEnv())
  51     nBlocks = specializeInst(Name + "_N", list(opTypeSet), EmulEnv())
  52
  53     for blocks in (regBlocks, eBlocks, nBlocks):
  54         allBlocks.header_output += blocks.header_output
  55         allBlocks.decoder_output += blocks.decoder_output
  56         allBlocks.exec_output += blocks.exec_output
  57
  58     allBlocks.decode_block = '''
  59         if (LEGACY_REP) {
  60             %s
  61         } else if (LEGACY_REPNE) {
  62             %s
  63         } else {
  64             %s
  65         }
  66     ''' % (eBlocks.decode_block, nBlocks.decode_block, regBlocks.decode_block)
  67
  68     (header_output, decoder_output,
  69      decode_block, exec_output) = allBlocks.makeList()
  70 }};
  71
  72 def format StringInst(*opTypeSet) {{
  73     allBlocks = OutputBlocks()
  74
  75     regBlocks = specializeInst(Name, list(opTypeSet), EmulEnv())
  76     eBlocks = specializeInst(Name + "_E", list(opTypeSet), EmulEnv())
  77
  78     for blocks in (regBlocks, eBlocks):
  79         allBlocks.header_output += blocks.header_output
  80         allBlocks.decoder_output += blocks.decoder_output
  81         allBlocks.exec_output += blocks.exec_output
  82
  83     allBlocks.decode_block = '''
  84         if (LEGACY_REP) {
  85             %s
  86         } else if (LEGACY_REPNE) {
  87             // The repne prefix is illegal
  88             return new MicroFault(machInst, "illprefix", 0,
  89                                   std::make_shared<InvalidOpcode>(), 0);
  90         } else {
  91             %s
  92         }
  93     ''' % (eBlocks.decode_block, regBlocks.decode_block)
  94
  95     (header_output, decoder_output,
  96      decode_block, exec_output) = allBlocks.makeList()
  97 }};