1// -*- mode:c++ -*- 2 3// Copyright (c) 2007 The Hewlett-Packard Development Company 4// All rights reserved. 5// 6// Redistribution and use of this software in source and binary forms, 7// with or without modification, are permitted provided that the 8// following conditions are met: --- 53 unchanged lines hidden (view full) --- 62// 63 64let {{ 65 # This code builds up a decode block which decodes based on switchval. 66 # vals is a dict which matches case values with what should be decoded to. 67 # builder is called on the exploded contents of "vals" values to generate 68 # whatever code should be used. 69 def doSplitDecode(name, Name, builder, switchVal, vals, default = None): |
70 blocks = OutputBlocks() 71 blocks.decode_block += 'switch(%s) {\n' % switchVal |
72 for (val, todo) in vals.items(): |
73 built = builder(name, Name, *todo) 74 built.decode_block = '\tcase %s: %s\n' % (val, built.decode_block) 75 blocks.append(built) |
76 if default: |
77 built = builder(name, Name, *default) 78 built.decode_block = '\tdefault: %s\n' % built.decode_block 79 blocks.append(built) 80 blocks.decode_block += '}\n' 81 return blocks |
82}}; 83 84let {{ 85 class OpType(object): 86 parser = re.compile(r"(?P<tag>[A-Z][A-Z]*)(?P<size>[a-z][a-z]*)|(r(?P<reg>[A-Za-z0-9][A-Za-z0-9]*))") 87 def __init__(self, opTypeString): 88 match = OpType.parser.search(opTypeString) 89 if match == None: --- 36 unchanged lines hidden (view full) --- 126 # This might refer to memory or to a register. We need to 127 # divide it up farther. 128 regCode = opRe.sub("%{(uint8_t)MODRM_RM}", code) 129 regTypes = copy.copy(opTypes) 130 regTypes.pop(-1) 131 # This needs to refer to memory, but we'll fill in the details 132 # later. It needs to take into account unaligned memory 133 # addresses. |
134 code = "GenFault ${new UnimpInstFault}\n" + code |
135 memCode = opRe.sub("%0", code) 136 memTypes = copy.copy(opTypes) 137 memTypes.pop(-1) 138 return doSplitDecode(name, Name, specializeInst, "MODRM_MOD", 139 {"3" : (regCode, regTypes)}, (memCode, memTypes)) 140 elif opType.tag in ("I", "J"): 141 # Immediates are already in the instruction, so don't leave in 142 # those parameters 143 code = opRe.sub("${IMMEDIATE}", code) 144 elif opType.tag == "M": 145 # This needs to refer to memory, but we'll fill in the details 146 # later. It needs to take into account unaligned memory 147 # addresses. |
148 code = "GenFault ${new UnimpInstFault}\n" + code |
149 code = opRe.sub("%0", code) 150 elif opType.tag in ("PR", "R", "VR"): 151 # There should probably be a check here to verify that mod 152 # is equal to 11b 153 code = opRe.sub("%{(uint8_t)MODRM_RM}", code) 154 else: 155 raise Exception, "Unrecognized tag %s." % opType.tag 156 opTypes.pop(-1) 157 158 # At this point, we've built up "code" to have all the necessary extra 159 # instructions needed to implement whatever types of operands were 160 # specified. Now we'll assemble it it into a StaticInst. |
161 blocks = OutputBlocks() 162 blocks.append(assembleMicro(name, Name, code)) 163 return blocks |
164}}; |