mem.isa revision 7294
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 loadStoreBaseWork(name, Name, imm, swp, rfe, codeBlobs, memFlags, 42 instFlags, double, base = 'Memory', 43 execTemplateBase = ''): 44 # Make sure flags are in lists (convert to lists if not). 45 memFlags = makeList(memFlags) 46 instFlags = makeList(instFlags) 47 48 eaCode = codeBlobs["ea_code"] 49 50 # This shouldn't be part of the eaCode, but until the exec templates 51 # are converted over it's the easiest place to put it. 52 eaCode += '\n unsigned memAccessFlags = ' 53 eaCode += (string.join(memFlags, '|') + ';') 54 55 codeBlobs["ea_code"] = eaCode 56 57 iop = InstObjParams(name, Name, base, codeBlobs, instFlags) 58 59 fullExecTemplate = eval(execTemplateBase + 'Execute') 60 initiateAccTemplate = eval(execTemplateBase + 'InitiateAcc') 61 completeAccTemplate = eval(execTemplateBase + 'CompleteAcc') 62 63 if swp: 64 declareTemplate = SwapDeclare 65 constructTemplate = SwapConstructor 66 elif rfe: 67 declareTemplate = RfeDeclare 68 constructTemplate = RfeConstructor 69 elif imm: 70 if double: 71 declareTemplate = LoadStoreDImmDeclare 72 constructTemplate = LoadStoreDImmConstructor 73 else: 74 declareTemplate = LoadStoreImmDeclare 75 constructTemplate = LoadStoreImmConstructor 76 else: 77 if double: 78 declareTemplate = LoadStoreDRegDeclare 79 constructTemplate = LoadStoreDRegConstructor 80 else: 81 declareTemplate = LoadStoreRegDeclare 82 constructTemplate = LoadStoreRegConstructor 83 84 # (header_output, decoder_output, decode_block, exec_output) 85 return (declareTemplate.subst(iop), 86 constructTemplate.subst(iop), 87 fullExecTemplate.subst(iop) 88 + initiateAccTemplate.subst(iop) 89 + completeAccTemplate.subst(iop)) 90 91 def loadStoreBase(name, Name, imm, eaCode, accCode, memFlags, 92 instFlags, double, base = 'Memory', 93 execTemplateBase = ''): 94 codeBlobs = { "ea_code": eaCode, 95 "memacc_code": accCode, 96 "predicate_test": predicateTest } 97 return loadStoreBaseWork(name, Name, imm, False, False, codeBlobs, 98 memFlags, instFlags, double, base, 99 execTemplateBase) 100 101 def RfeBase(name, Name, eaCode, accCode, memFlags, instFlags): 102 codeBlobs = { "ea_code": eaCode, 103 "memacc_code": accCode, 104 "predicate_test": predicateTest } 105 return loadStoreBaseWork(name, Name, False, False, True, codeBlobs, 106 memFlags, instFlags, False, 'RfeOp', 'Load') 107 108 def SwapBase(name, Name, eaCode, preAccCode, postAccCode, memFlags, 109 instFlags): 110 codeBlobs = { "ea_code": eaCode, 111 "preacc_code": preAccCode, 112 "postacc_code": postAccCode, 113 "predicate_test": predicateTest } 114 return loadStoreBaseWork(name, Name, False, True, False, codeBlobs, 115 memFlags, instFlags, False, 'Swap', 'Swap') 116 117 def memClassName(base, post, add, writeback, \ 118 size=4, sign=False, user=False): 119 Name = base 120 121 if post: 122 Name += '_PY' 123 else: 124 Name += '_PN' 125 126 if add: 127 Name += '_AY' 128 else: 129 Name += '_AN' 130 131 if writeback: 132 Name += '_WY' 133 else: 134 Name += '_WN' 135 136 Name += ('_SZ%d' % size) 137 138 if sign: 139 Name += '_SY' 140 else: 141 Name += '_SN' 142 143 if user: 144 Name += '_UY' 145 else: 146 Name += '_UN' 147 148 return Name 149 150 def buildMemSuffix(sign, size): 151 if size == 4: 152 memSuffix = '' 153 elif size == 2: 154 if sign: 155 memSuffix = '.sh' 156 else: 157 memSuffix = '.uh' 158 elif size == 1: 159 if sign: 160 memSuffix = '.sb' 161 else: 162 memSuffix = '.ub' 163 else: 164 raise Exception, "Unrecognized size for load %d" % size 165 166 return memSuffix 167 168 def buildMemBase(base, post, writeback): 169 if post and writeback: 170 base = "MemoryPostIndex<%s>" % base 171 elif not post and writeback: 172 base = "MemoryPreIndex<%s>" % base 173 elif not post and not writeback: 174 base = "MemoryOffset<%s>" % base 175 else: 176 raise Exception, "Illegal combination of post and writeback" 177 return base 178}}; 179 180