mem.isa revision 7133:4a1af4580b7d
1// -*- mode:c++ -*- 2 3// Copyright (c) 2010 ARM Limited 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 21// documentation and/or other materials provided with the distribution; 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 34// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 35// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 36// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 37// 38// Authors: Gabe Black 39 40let {{ 41 def loadStoreBase(name, Name, imm, eaCode, accCode, memFlags, 42 instFlags, base = 'Memory', execTemplateBase = ''): 43 # Make sure flags are in lists (convert to lists if not). 44 memFlags = makeList(memFlags) 45 instFlags = makeList(instFlags) 46 47 # This shouldn't be part of the eaCode, but until the exec templates 48 # are converted over it's the easiest place to put it. 49 eaCode += '\n unsigned memAccessFlags = ' 50 if memFlags: 51 eaCode += (string.join(memFlags, '|') + ';') 52 else: 53 eaCode += '0;' 54 55 iop = InstObjParams(name, Name, base, 56 {'ea_code': eaCode, 57 'memacc_code': accCode, 58 'predicate_test': predicateTest}, 59 instFlags) 60 61 fullExecTemplate = eval(execTemplateBase + 'Execute') 62 initiateAccTemplate = eval(execTemplateBase + 'InitiateAcc') 63 completeAccTemplate = eval(execTemplateBase + 'CompleteAcc') 64 65 if imm: 66 declareTemplate = LoadStoreImmDeclare 67 constructTemplate = LoadStoreImmConstructor 68 else: 69 declareTemplate = LoadStoreRegDeclare 70 constructTemplate = LoadStoreRegConstructor 71 72 # (header_output, decoder_output, decode_block, exec_output) 73 return (declareTemplate.subst(iop), 74 constructTemplate.subst(iop), 75 fullExecTemplate.subst(iop) 76 + initiateAccTemplate.subst(iop) 77 + completeAccTemplate.subst(iop)) 78 79 def memClassName(base, post, add, writeback, \ 80 size=4, sign=False, user=False): 81 Name = base 82 83 if post: 84 Name += '_PY' 85 else: 86 Name += '_PN' 87 88 if add: 89 Name += '_AY' 90 else: 91 Name += '_AN' 92 93 if writeback: 94 Name += '_WY' 95 else: 96 Name += '_WN' 97 98 Name += ('_SZ%d' % size) 99 100 if sign: 101 Name += '_SY' 102 else: 103 Name += '_SN' 104 105 if user: 106 Name += '_UY' 107 else: 108 Name += '_UN' 109 110 return Name 111 112 def buildMemSuffix(sign, size): 113 if size == 4: 114 memSuffix = '' 115 elif size == 2: 116 if sign: 117 memSuffix = '.sh' 118 else: 119 memSuffix = '.uh' 120 elif size == 1: 121 if sign: 122 memSuffix = '.sb' 123 else: 124 memSuffix = '.ub' 125 else: 126 raise Exception, "Unrecognized size for load %d" % size 127 128 return memSuffix 129 130 def buildMemBase(base, post, writeback): 131 if post and writeback: 132 base = "MemoryPostIndex<%s>" % base 133 elif not post and writeback: 134 base = "MemoryPreIndex<%s>" % base 135 elif not post and not writeback: 136 base = "MemoryOffset<%s>" % base 137 else: 138 raise Exception, "Illegal combination of post and writeback" 139 return base 140}}; 141 142