src/arch/mips/isa/formats/util.isa

   1 // -*- mode:c++ -*-
   2
   3 // Copyright (c) 2003-2005 The Regents of The University of Michigan
   4 // Copyright (c) 2007 MIPS Technologies, Inc.
   5 // All rights reserved.
   6 //
   7 // Redistribution and use in source and binary forms, with or without
   8 // modification, are permitted provided that the following conditions are
   9 // met: redistributions of source code must retain the above copyright
  10 // notice, this list of conditions and the following disclaimer;
  11 // redistributions in binary form must reproduce the above copyright
  12 // notice, this list of conditions and the following disclaimer in the
  13 // documentation and/or other materials provided with the distribution;
  14 // neither the name of the copyright holders nor the names of its
  15 // contributors may be used to endorse or promote products derived from
  16 // this software without specific prior written permission.
  17 //
  18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29
  30 let {{
  31 def LoadStoreBase(name, Name, ea_code, memacc_code, mem_flags, inst_flags,
  32                   postacc_code = '', base_class = 'Memory',
  33                   decode_template = BasicDecode, exec_template_base = ''):
  34     # Make sure flags are in lists (convert to lists if not).
  35     mem_flags = makeList(mem_flags)
  36     inst_flags = makeList(inst_flags)
  37
  38     # Some CPU models execute the memory operation as an atomic unit,
  39     # while others want to separate them into an effective address
  40     # computation and a memory access operation.  As a result, we need
  41     # to generate three StaticInst objects.  Note that the latter two
  42     # are nested inside the larger "atomic" one.
  43
  44     # Generate InstObjParams for each of the three objects.  Note that
  45     # they differ only in the set of code objects contained (which in
  46     # turn affects the object's overall operand list).
  47     iop = InstObjParams(name, Name, base_class,
  48                         { 'ea_code':ea_code, 'memacc_code':memacc_code, 'postacc_code':postacc_code },
  49                         inst_flags)
  50
  51     if mem_flags:
  52         mem_flags = [ 'Request::%s' % flag for flag in mem_flags ]
  53         s = '\n\tmemAccessFlags = ' + string.join(mem_flags, '|') + ';'
  54         iop.constructor += s
  55
  56     # select templates
  57
  58     # The InitiateAcc template is the same for StoreCond templates as the
  59     # corresponding Store template..
  60     StoreCondInitiateAcc = StoreInitiateAcc
  61
  62     fullExecTemplate = eval(exec_template_base + 'Execute')
  63     initiateAccTemplate = eval(exec_template_base + 'InitiateAcc')
  64     completeAccTemplate = eval(exec_template_base + 'CompleteAcc')
  65
  66     # (header_output, decoder_output, decode_block, exec_output)
  67     return (LoadStoreDeclare.subst(iop),
  68             LoadStoreConstructor.subst(iop),
  69             decode_template.subst(iop),
  70             fullExecTemplate.subst(iop)
  71             + initiateAccTemplate.subst(iop)
  72             + completeAccTemplate.subst(iop))
  73 }};
  74
  75 output header {{
  76         std::string inst2string(MachInst machInst);
  77 }};
  78
  79 output decoder {{
  80
  81 std::string inst2string(MachInst machInst)
  82 {
  83     string str = "";
  84     uint32_t mask = 0x80000000;
  85
  86     for(int i=0; i < 32; i++) {
  87         if ((machInst & mask) == 0) {
  88             str += "0";
  89         } else {
  90             str += "1";
  91         }
  92
  93         mask = mask >> 1;
  94     }
  95
  96     return str;
  97 }
  98
  99 }};