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 // Authors: Steve Reinhardt
  31 //          Korey Sewell
  32
  33 let {{
  34 def LoadStoreBase(name, Name, ea_code, memacc_code, mem_flags, inst_flags,
  35                   postacc_code = '', base_class = 'Memory',
  36                   decode_template = BasicDecode, exec_template_base = ''):
  37     # Make sure flags are in lists (convert to lists if not).
  38     mem_flags = makeList(mem_flags)
  39     inst_flags = makeList(inst_flags)
  40
  41     # Some CPU models execute the memory operation as an atomic unit,
  42     # while others want to separate them into an effective address
  43     # computation and a memory access operation.  As a result, we need
  44     # to generate three StaticInst objects.  Note that the latter two
  45     # are nested inside the larger "atomic" one.
  46
  47     # Generate InstObjParams for each of the three objects.  Note that
  48     # they differ only in the set of code objects contained (which in
  49     # turn affects the object's overall operand list).
  50     iop = InstObjParams(name, Name, base_class,
  51                         { 'ea_code':ea_code, 'memacc_code':memacc_code, 'postacc_code':postacc_code },
  52                         inst_flags)
  53
  54     if mem_flags:
  55         mem_flags = [ 'Request::%s' % flag for flag in mem_flags ]
  56         s = '\n\tmemAccessFlags = ' + string.join(mem_flags, '|') + ';'
  57         iop.constructor += s
  58
  59     # select templates
  60
  61     # The InitiateAcc template is the same for StoreCond templates as the
  62     # corresponding Store template..
  63     StoreCondInitiateAcc = StoreInitiateAcc
  64
  65     fullExecTemplate = eval(exec_template_base + 'Execute')
  66     initiateAccTemplate = eval(exec_template_base + 'InitiateAcc')
  67     completeAccTemplate = eval(exec_template_base + 'CompleteAcc')
  68
  69     # (header_output, decoder_output, decode_block, exec_output)
  70     return (LoadStoreDeclare.subst(iop),
  71             LoadStoreConstructor.subst(iop),
  72             decode_template.subst(iop),
  73             fullExecTemplate.subst(iop)
  74             + initiateAccTemplate.subst(iop)
  75             + completeAccTemplate.subst(iop))
  76 }};
  77
  78 output header {{
  79         std::string inst2string(MachInst machInst);
  80 }};
  81
  82 output decoder {{
  83
  84 std::string inst2string(MachInst machInst)
  85 {
  86     string str = "";
  87     uint32_t mask = 0x80000000;
  88
  89     for(int i=0; i < 32; i++) {
  90         if ((machInst & mask) == 0) {
  91             str += "0";
  92         } else {
  93             str += "1";
  94         }
  95
  96         mask = mask >> 1;
  97     }
  98
  99     return str;
 100 }
 101
 102 }};