multi.isa revision 4310:8f9d834f19bc
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: 9// 10// The software must be used only for Non-Commercial Use which means any 11// use which is NOT directed to receiving any direct monetary 12// compensation for, or commercial advantage from such use. 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Neither the name of 32// the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its 33// contributors may be used to endorse or promote products derived from 34// this software without specific prior written permission. No right of 35// sublicense is granted herewith. Derivatives of the software and 36// output created using the software may be prepared, but only for 37// Non-Commercial Uses. Derivatives of the software may be shared with 38// others provided: (i) the others agree to abide by the list of 39// conditions herein which includes the Non-Commercial Use restrictions; 40// and (ii) such Derivatives of the software include the above copyright 41// notice to acknowledge the contribution from this software where 42// applicable, this list of conditions and the disclaimer below. 43// 44// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 45// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 46// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 47// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 48// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 49// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 50// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 51// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 52// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 53// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 54// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 55// 56// Authors: Gabe Black 57 58//////////////////////////////////////////////////////////////////// 59// 60// Instructions that do the same thing to multiple sets of arguments. 61// 62 63output header {{ 64}}; 65 66output decoder {{ 67}}; 68 69output exec {{ 70}}; 71 72let {{ 73 multiops = {} 74}}; 75 76def format MultiOp(code, switchVal, opTags, *opt_flags) {{ 77 # These are C++ statements to create each type of static int. Since we 78 # don't know what will be microcoded and what won't, we can't assume a 79 # particular set of arguments for the constructor. 80 instNew = [] 81 orig_code = code 82 opRe = re.compile(r"%(?P<operandNum>[0-9]*)") 83 # Get all the labels out of the code and make a dict for them. We'll do 84 # this once since the position of labels shouldn't need to change at all. 85 ops = assembleMicro(code) 86 labels = buildLabelDict(ops) 87 for tagSet in opTags: 88 # A list of strings which either have the register number to use, or 89 # a piece of code for calculating it. 90 regNums = [] 91 code = orig_code 92 # Build up a name for this instructions class using the argument 93 # types. Each variation will get its own name this way. 94 postfix = '' 95 for tag in tagSet: 96 postfix += '_' + tag 97 98 # Figure out what register indexes to use for each operand. This 99 # is where loads/stores could be set up. I need to distinguish 100 # between inputs and outputs. 101 # For right now, the indexes are just an increasing sequence 102 counter = 0 103 for tag in tagSet: 104 regNums.append("%d" % counter) 105 counter += 1 106 107 # Replace the placeholders %0, %1, etc., with the right register 108 # indexes. 109 opMatch = opRe.search(code) 110 while opMatch: 111 opNum = opMatch.group("operandNum") 112 opNum = int(opNum) 113 if opNum > len(regNums): 114 print "No operand type specified for operand %d!" % opNum 115 print "I should bail out here too!" 116 regNum = regNums[opNum] 117 code = opRe.sub(regNum, code, 1) 118 opMatch = opRe.search(code) 119 120 # All the loads which feed this instruction 121 loads = [] 122 # All the ops that make up the instruction proper. 123 ops = assembleMicro(code) 124 # Get all the labels out and make a dict for them 125 # All the stores for this instruction's results 126 stores = [] 127 128 # Various counts 129 numLoads = len(loads) 130 numOps = len(ops) 131 numStores = len(stores) 132 totalOps = numLoads + numOps + numStores 133 print "There are %d total ops" % totalOps 134 135 # If we can implement this instruction with exactly one microop, just 136 # use that directly. 137 newStmnt = '' 138 if totalOps == 1: 139 newStmnt = ops[0].getAllocator(labels) 140 else: 141 # Build up a macro op. We'll punt on this for now 142 pass 143 144 instNew.append(newStmnt) 145 146 decodeBlob = 'switch(%s) {\n' % switchVal 147 counter = 0 148 for newStmnt in instNew: 149 decodeBlob += 'case %d: return (X86StaticInst *)(%s);\n' % \ 150 (counter, newStmnt) 151 counter += 1 152 decodeBlob += '}\n' 153 decode_block = decodeBlob 154}}; 155