specialize.isa revision 4548
16145Snate@binkert.org// -*- mode:c++ -*- 26145Snate@binkert.org 36145Snate@binkert.org// Copyright (c) 2007 The Hewlett-Packard Development Company 46145Snate@binkert.org// All rights reserved. 56145Snate@binkert.org// 66145Snate@binkert.org// Redistribution and use of this software in source and binary forms, 76145Snate@binkert.org// with or without modification, are permitted provided that the 86145Snate@binkert.org// following conditions are met: 96145Snate@binkert.org// 106145Snate@binkert.org// The software must be used only for Non-Commercial Use which means any 116145Snate@binkert.org// use which is NOT directed to receiving any direct monetary 126145Snate@binkert.org// compensation for, or commercial advantage from such use. Illustrative 136145Snate@binkert.org// examples of non-commercial use are academic research, personal study, 146145Snate@binkert.org// teaching, education and corporate research & development. 156145Snate@binkert.org// Illustrative examples of commercial use are distributing products for 166145Snate@binkert.org// commercial advantage and providing services using the software for 176145Snate@binkert.org// commercial advantage. 186145Snate@binkert.org// 196145Snate@binkert.org// If you wish to use this software or functionality therein that may be 206145Snate@binkert.org// covered by patents for commercial use, please contact: 216145Snate@binkert.org// Director of Intellectual Property Licensing 226145Snate@binkert.org// Office of Strategy and Technology 236145Snate@binkert.org// Hewlett-Packard Company 246145Snate@binkert.org// 1501 Page Mill Road 256145Snate@binkert.org// Palo Alto, California 94304 266145Snate@binkert.org// 276145Snate@binkert.org// Redistributions of source code must retain the above copyright notice, 286145Snate@binkert.org// this list of conditions and the following disclaimer. Redistributions 297832Snate@binkert.org// in binary form must reproduce the above copyright notice, this list of 307547SBrad.Beckmann@amd.com// conditions and the following disclaimer in the documentation and/or 317547SBrad.Beckmann@amd.com// other materials provided with the distribution. Neither the name of 328645Snilay@cs.wisc.edu// the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its 337454Snate@binkert.org// contributors may be used to endorse or promote products derived from 347054Snate@binkert.org// this software without specific prior written permission. No right of 3510301Snilay@cs.wisc.edu// sublicense is granted herewith. Derivatives of the software and 368258SBrad.Beckmann@amd.com// output created using the software may be prepared, but only for 376154Snate@binkert.org// Non-Commercial Uses. Derivatives of the software may be shared with 387054Snate@binkert.org// others provided: (i) the others agree to abide by the list of 397547SBrad.Beckmann@amd.com// conditions herein which includes the Non-Commercial Use restrictions; 406154Snate@binkert.org// and (ii) such Derivatives of the software include the above copyright 416145Snate@binkert.org// notice to acknowledge the contribution from this software where 427055Snate@binkert.org// applicable, this list of conditions and the disclaimer below. 437454Snate@binkert.org// 447055Snate@binkert.org// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 456876Ssteve.reinhardt@amd.com// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 4611124Snilay@cs.wisc.edu// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 4711124Snilay@cs.wisc.edu// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 4811124Snilay@cs.wisc.edu// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 496285Snate@binkert.org// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 509274Snilay@cs.wisc.edu// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 519593Snilay@cs.wisc.edu// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 529593Snilay@cs.wisc.edu// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 539274Snilay@cs.wisc.edu// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 549858Snilay@cs.wisc.edu// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 559274Snilay@cs.wisc.edu// 569274Snilay@cs.wisc.edu// Authors: Gabe Black 5711021Sjthestness@gmail.com 5811021Sjthestness@gmail.com//////////////////////////////////////////////////////////////////// 5911021Sjthestness@gmail.com// 606881SBrad.Beckmann@amd.com// Code to "specialize" a microcode sequence to use a particular 616285Snate@binkert.org// variety of operands 627054Snate@binkert.org// 637054Snate@binkert.org 646881SBrad.Beckmann@amd.comlet {{ 657054Snate@binkert.org # This code builds up a decode block which decodes based on switchval. 666881SBrad.Beckmann@amd.com # vals is a dict which matches case values with what should be decoded to. 677054Snate@binkert.org # builder is called on the exploded contents of "vals" values to generate 687054Snate@binkert.org # whatever code should be used. 697054Snate@binkert.org def doSplitDecode(Name, builder, switchVal, vals, default = None): 709799Snilay@cs.wisc.edu blocks = OutputBlocks() 716285Snate@binkert.org blocks.decode_block = 'switch(%s) {\n' % switchVal 726145Snate@binkert.org for (val, todo) in vals.items(): 736145Snate@binkert.org new_blocks = builder(Name, *todo) 746145Snate@binkert.org new_blocks.decode_block = \ 759858Snilay@cs.wisc.edu '\tcase %s: %s\n' % (val, new_blocks.decode_block) 7611021Sjthestness@gmail.com blocks.append(new_blocks) 776145Snate@binkert.org if default: 786145Snate@binkert.org new_blocks = builder(Name, *default) 796145Snate@binkert.org new_blocks.decode_block = \ 807054Snate@binkert.org '\tdefault: %s\n' % new_blocks.decode_block 8111663Stushar@ece.gatech.edu blocks.append(new_blocks) 829799Snilay@cs.wisc.edu blocks.decode_block += '}\n' 836145Snate@binkert.org return blocks 847054Snate@binkert.org}}; 859858Snilay@cs.wisc.edu 869858Snilay@cs.wisc.edulet {{ 877054Snate@binkert.org class OpType(object): 888258SBrad.Beckmann@amd.com parser = re.compile(r"(?P<tag>[A-Z][A-Z]*)(?P<size>[a-z][a-z]*)|(r(?P<reg>[A-Z0-9])(?P<rsize>[a-z]*))") 898258SBrad.Beckmann@amd.com def __init__(self, opTypeString): 9010311Snilay@cs.wisc.edu match = OpType.parser.search(opTypeString) 9110311Snilay@cs.wisc.edu if match == None: 9210311Snilay@cs.wisc.edu raise Exception, "Problem parsing operand type %s" % opTypeString 936145Snate@binkert.org self.reg = match.group("reg") 946145Snate@binkert.org self.tag = match.group("tag") 956145Snate@binkert.org self.size = match.group("size") 967054Snate@binkert.org self.rsize = match.group("rsize") 9711663Stushar@ece.gatech.edu 989799Snilay@cs.wisc.edu ModRMRegIndex = "(MODRM_REG | (REX_R << 3))" 996145Snate@binkert.org ModRMRMIndex = "(MODRM_RM | (REX_B << 3))" 1007054Snate@binkert.org 1019858Snilay@cs.wisc.edu # This function specializes the given piece of code to use a particular 1026145Snate@binkert.org # set of argument types described by "opTypes". 1036145Snate@binkert.org def specializeInst(Name, opTypes, env): 1046145Snate@binkert.org print "Specializing %s with opTypes %s" % (Name, opTypes) 1057054Snate@binkert.org while len(opTypes): 10610917Sbrandon.potter@amd.com # Parse the operand type string we're working with 10711664Stushar@ece.gatech.edu opType = OpType(opTypes[0]) 10811664Stushar@ece.gatech.edu 10911664Stushar@ece.gatech.edu if opType.reg: 1106145Snate@binkert.org #Figure out what to do with fixed register operands 1116145Snate@binkert.org #This is the index to use, so we should stick it some place. 11210370Snilay@cs.wisc.edu if opType.reg in ("A", "B", "C", "D"): 11310370Snilay@cs.wisc.edu env.addReg("INTREG_R%sX" % opType.reg) 1146145Snate@binkert.org else: 1157054Snate@binkert.org env.addReg("INTREG_R%s" % opType.reg) 11611021Sjthestness@gmail.com if opType.size: 11711021Sjthestness@gmail.com if opType.rsize in ("l", "h", "b"): 11811021Sjthestness@gmail.com print "byte" 11910311Snilay@cs.wisc.edu elif opType.rsize == "x": 1207054Snate@binkert.org print "word" 12110311Snilay@cs.wisc.edu else: 1227054Snate@binkert.org print "Didn't recognize fixed register size %s!" % opType.rsize 1238258SBrad.Beckmann@amd.com elif opType.tag == None or opType.size == None: 1248258SBrad.Beckmann@amd.com raise Exception, "Problem parsing operand tag: %s" % opType.tag 1259858Snilay@cs.wisc.edu elif opType.tag in ("C", "D", "G", "P", "S", "T", "V"): 1269858Snilay@cs.wisc.edu # Use the "reg" field of the ModRM byte to select the register 12710311Snilay@cs.wisc.edu env.addReg(ModRMRegIndex) 12810311Snilay@cs.wisc.edu elif opType.tag in ("E", "Q", "W"): 1297054Snate@binkert.org # This might refer to memory or to a register. We need to 1307054Snate@binkert.org # divide it up farther. 1317054Snate@binkert.org regTypes = copy.copy(opTypes) 1329863Snilay@cs.wisc.edu regTypes.pop(0) 1337054Snate@binkert.org regEnv = copy.copy(env) 13411523Sdavid.guillen@arm.com regEnv.addReg(ModRMRMIndex) 13511523Sdavid.guillen@arm.com # This needs to refer to memory, but we'll fill in the details 1369863Snilay@cs.wisc.edu # later. It needs to take into account unaligned memory 1379863Snilay@cs.wisc.edu # addresses. 1389863Snilay@cs.wisc.edu memTypes = copy.copy(opTypes) 1399863Snilay@cs.wisc.edu memTypes.pop(0) 1409863Snilay@cs.wisc.edu memEnv = copy.copy(env) 1419863Snilay@cs.wisc.edu print "%0" 1429863Snilay@cs.wisc.edu return doSplitDecode(Name, specializeInst, "MODRM_MOD", 1439863Snilay@cs.wisc.edu {"3" : (regTypes, regEnv)}, (memTypes, memEnv)) 1449863Snilay@cs.wisc.edu elif opType.tag in ("I", "J"): 1459863Snilay@cs.wisc.edu # Immediates 1467547SBrad.Beckmann@amd.com print "IMMEDIATE" 1479863Snilay@cs.wisc.edu elif opType.tag == "M": 1489863Snilay@cs.wisc.edu # This needs to refer to memory, but we'll fill in the details 1499863Snilay@cs.wisc.edu # later. It needs to take into account unaligned memory 1509863Snilay@cs.wisc.edu # addresses. 1517547SBrad.Beckmann@amd.com print "%0" 1529863Snilay@cs.wisc.edu elif opType.tag in ("PR", "R", "VR"): 1539863Snilay@cs.wisc.edu # There should probably be a check here to verify that mod 1549863Snilay@cs.wisc.edu # is equal to 11b 1559863Snilay@cs.wisc.edu env.addReg(ModRMRMIndex) 1567054Snate@binkert.org else: 1577054Snate@binkert.org raise Exception, "Unrecognized tag %s." % opType.tag 1587054Snate@binkert.org opTypes.pop(0) 1597054Snate@binkert.org 1609863Snilay@cs.wisc.edu # Generate code to return a macroop of the given name which will 1617054Snate@binkert.org # operate in the given "emulation environment" 1629858Snilay@cs.wisc.edu return genMacroop(Name, env) 1639863Snilay@cs.wisc.edu}}; 1647054Snate@binkert.org