fpop.isa revision 5083
15083Sgblack@eecs.umich.edu// Copyright (c) 2007 The Hewlett-Packard Development Company 25083Sgblack@eecs.umich.edu// All rights reserved. 35083Sgblack@eecs.umich.edu// 45083Sgblack@eecs.umich.edu// Redistribution and use of this software in source and binary forms, 55083Sgblack@eecs.umich.edu// with or without modification, are permitted provided that the 65083Sgblack@eecs.umich.edu// following conditions are met: 75083Sgblack@eecs.umich.edu// 85083Sgblack@eecs.umich.edu// The software must be used only for Non-Commercial Use which means any 95083Sgblack@eecs.umich.edu// use which is NOT directed to receiving any direct monetary 105083Sgblack@eecs.umich.edu// compensation for, or commercial advantage from such use. Illustrative 115083Sgblack@eecs.umich.edu// examples of non-commercial use are academic research, personal study, 125083Sgblack@eecs.umich.edu// teaching, education and corporate research & development. 135083Sgblack@eecs.umich.edu// Illustrative examples of commercial use are distributing products for 145083Sgblack@eecs.umich.edu// commercial advantage and providing services using the software for 155083Sgblack@eecs.umich.edu// commercial advantage. 165083Sgblack@eecs.umich.edu// 175083Sgblack@eecs.umich.edu// If you wish to use this software or functionality therein that may be 185083Sgblack@eecs.umich.edu// covered by patents for commercial use, please contact: 195083Sgblack@eecs.umich.edu// Director of Intellectual Property Licensing 205083Sgblack@eecs.umich.edu// Office of Strategy and Technology 215083Sgblack@eecs.umich.edu// Hewlett-Packard Company 225083Sgblack@eecs.umich.edu// 1501 Page Mill Road 235083Sgblack@eecs.umich.edu// Palo Alto, California 94304 245083Sgblack@eecs.umich.edu// 255083Sgblack@eecs.umich.edu// Redistributions of source code must retain the above copyright notice, 265083Sgblack@eecs.umich.edu// this list of conditions and the following disclaimer. Redistributions 275083Sgblack@eecs.umich.edu// in binary form must reproduce the above copyright notice, this list of 285083Sgblack@eecs.umich.edu// conditions and the following disclaimer in the documentation and/or 295083Sgblack@eecs.umich.edu// other materials provided with the distribution. Neither the name of 305083Sgblack@eecs.umich.edu// the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its 315083Sgblack@eecs.umich.edu// contributors may be used to endorse or promote products derived from 325083Sgblack@eecs.umich.edu// this software without specific prior written permission. No right of 335083Sgblack@eecs.umich.edu// sublicense is granted herewith. Derivatives of the software and 345083Sgblack@eecs.umich.edu// output created using the software may be prepared, but only for 355083Sgblack@eecs.umich.edu// Non-Commercial Uses. Derivatives of the software may be shared with 365083Sgblack@eecs.umich.edu// others provided: (i) the others agree to abide by the list of 375083Sgblack@eecs.umich.edu// conditions herein which includes the Non-Commercial Use restrictions; 385083Sgblack@eecs.umich.edu// and (ii) such Derivatives of the software include the above copyright 395083Sgblack@eecs.umich.edu// notice to acknowledge the contribution from this software where 405083Sgblack@eecs.umich.edu// applicable, this list of conditions and the disclaimer below. 415083Sgblack@eecs.umich.edu// 425083Sgblack@eecs.umich.edu// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 435083Sgblack@eecs.umich.edu// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 445083Sgblack@eecs.umich.edu// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 455083Sgblack@eecs.umich.edu// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 465083Sgblack@eecs.umich.edu// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 475083Sgblack@eecs.umich.edu// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 485083Sgblack@eecs.umich.edu// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 495083Sgblack@eecs.umich.edu// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 505083Sgblack@eecs.umich.edu// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 515083Sgblack@eecs.umich.edu// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 525083Sgblack@eecs.umich.edu// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 535083Sgblack@eecs.umich.edu// 545083Sgblack@eecs.umich.edu// Authors: Gabe Black 555083Sgblack@eecs.umich.edu 565083Sgblack@eecs.umich.edu////////////////////////////////////////////////////////////////////////// 575083Sgblack@eecs.umich.edu// 585083Sgblack@eecs.umich.edu// FpOp Microop templates 595083Sgblack@eecs.umich.edu// 605083Sgblack@eecs.umich.edu////////////////////////////////////////////////////////////////////////// 615083Sgblack@eecs.umich.edu 625083Sgblack@eecs.umich.edudef template MicroFpOpExecute {{ 635083Sgblack@eecs.umich.edu Fault %(class_name)s::execute(%(CPU_exec_context)s *xc, 645083Sgblack@eecs.umich.edu Trace::InstRecord *traceData) const 655083Sgblack@eecs.umich.edu { 665083Sgblack@eecs.umich.edu Fault fault = NoFault; 675083Sgblack@eecs.umich.edu 685083Sgblack@eecs.umich.edu DPRINTF(X86, "The data size is %d\n", dataSize); 695083Sgblack@eecs.umich.edu %(op_decl)s; 705083Sgblack@eecs.umich.edu %(op_rd)s; 715083Sgblack@eecs.umich.edu 725083Sgblack@eecs.umich.edu if(%(cond_check)s) 735083Sgblack@eecs.umich.edu { 745083Sgblack@eecs.umich.edu %(code)s; 755083Sgblack@eecs.umich.edu %(flag_code)s; 765083Sgblack@eecs.umich.edu %(top_code)s; 775083Sgblack@eecs.umich.edu } 785083Sgblack@eecs.umich.edu else 795083Sgblack@eecs.umich.edu { 805083Sgblack@eecs.umich.edu %(else_code)s; 815083Sgblack@eecs.umich.edu } 825083Sgblack@eecs.umich.edu 835083Sgblack@eecs.umich.edu //Write the resulting state to the execution context 845083Sgblack@eecs.umich.edu if(fault == NoFault) 855083Sgblack@eecs.umich.edu { 865083Sgblack@eecs.umich.edu %(op_wb)s; 875083Sgblack@eecs.umich.edu } 885083Sgblack@eecs.umich.edu return fault; 895083Sgblack@eecs.umich.edu } 905083Sgblack@eecs.umich.edu}}; 915083Sgblack@eecs.umich.edu 925083Sgblack@eecs.umich.edudef template MicroFpOpDeclare {{ 935083Sgblack@eecs.umich.edu class %(class_name)s : public %(base_class)s 945083Sgblack@eecs.umich.edu { 955083Sgblack@eecs.umich.edu protected: 965083Sgblack@eecs.umich.edu void buildMe(); 975083Sgblack@eecs.umich.edu 985083Sgblack@eecs.umich.edu public: 995083Sgblack@eecs.umich.edu %(class_name)s(ExtMachInst _machInst, 1005083Sgblack@eecs.umich.edu const char * instMnem, 1015083Sgblack@eecs.umich.edu bool isMicro, bool isDelayed, bool isFirst, bool isLast, 1025083Sgblack@eecs.umich.edu RegIndex _src1, RegIndex _src2, RegIndex _dest, 1035083Sgblack@eecs.umich.edu uint8_t _dataSize, int8_t _spm); 1045083Sgblack@eecs.umich.edu 1055083Sgblack@eecs.umich.edu %(class_name)s(ExtMachInst _machInst, 1065083Sgblack@eecs.umich.edu const char * instMnem, 1075083Sgblack@eecs.umich.edu RegIndex _src1, RegIndex _src2, RegIndex _dest, 1085083Sgblack@eecs.umich.edu uint8_t _dataSize, int8_t _spm); 1095083Sgblack@eecs.umich.edu 1105083Sgblack@eecs.umich.edu %(BasicExecDeclare)s 1115083Sgblack@eecs.umich.edu }; 1125083Sgblack@eecs.umich.edu}}; 1135083Sgblack@eecs.umich.edu 1145083Sgblack@eecs.umich.edudef template MicroFpOpConstructor {{ 1155083Sgblack@eecs.umich.edu 1165083Sgblack@eecs.umich.edu inline void %(class_name)s::buildMe() 1175083Sgblack@eecs.umich.edu { 1185083Sgblack@eecs.umich.edu %(constructor)s; 1195083Sgblack@eecs.umich.edu } 1205083Sgblack@eecs.umich.edu 1215083Sgblack@eecs.umich.edu inline %(class_name)s::%(class_name)s( 1225083Sgblack@eecs.umich.edu ExtMachInst machInst, const char * instMnem, 1235083Sgblack@eecs.umich.edu RegIndex _src1, RegIndex _src2, RegIndex _dest, 1245083Sgblack@eecs.umich.edu uint8_t _dataSize, int8_t _spm) : 1255083Sgblack@eecs.umich.edu %(base_class)s(machInst, "%(mnemonic)s", instMnem, 1265083Sgblack@eecs.umich.edu false, false, false, false, 1275083Sgblack@eecs.umich.edu _src1, _src2, _dest, _dataSize, _spm, 1285083Sgblack@eecs.umich.edu %(op_class)s) 1295083Sgblack@eecs.umich.edu { 1305083Sgblack@eecs.umich.edu buildMe(); 1315083Sgblack@eecs.umich.edu } 1325083Sgblack@eecs.umich.edu 1335083Sgblack@eecs.umich.edu inline %(class_name)s::%(class_name)s( 1345083Sgblack@eecs.umich.edu ExtMachInst machInst, const char * instMnem, 1355083Sgblack@eecs.umich.edu bool isMicro, bool isDelayed, bool isFirst, bool isLast, 1365083Sgblack@eecs.umich.edu RegIndex _src1, RegIndex _src2, RegIndex _dest, 1375083Sgblack@eecs.umich.edu uint8_t _dataSize, int8_t _spm) : 1385083Sgblack@eecs.umich.edu %(base_class)s(machInst, "%(mnemonic)s", instMnem, 1395083Sgblack@eecs.umich.edu isMicro, isDelayed, isFirst, isLast, 1405083Sgblack@eecs.umich.edu _src1, _src2, _dest, _dataSize, _spm, 1415083Sgblack@eecs.umich.edu %(op_class)s) 1425083Sgblack@eecs.umich.edu { 1435083Sgblack@eecs.umich.edu buildMe(); 1445083Sgblack@eecs.umich.edu } 1455083Sgblack@eecs.umich.edu}}; 1465083Sgblack@eecs.umich.edu 1475083Sgblack@eecs.umich.edulet {{ 1485083Sgblack@eecs.umich.edu # Make these empty strings so that concatenating onto 1495083Sgblack@eecs.umich.edu # them will always work. 1505083Sgblack@eecs.umich.edu header_output = "" 1515083Sgblack@eecs.umich.edu decoder_output = "" 1525083Sgblack@eecs.umich.edu exec_output = "" 1535083Sgblack@eecs.umich.edu 1545083Sgblack@eecs.umich.edu class FpOpMeta(type): 1555083Sgblack@eecs.umich.edu def buildCppClasses(self, name, Name, suffix, \ 1565083Sgblack@eecs.umich.edu code, flag_code, cond_check, else_code): 1575083Sgblack@eecs.umich.edu 1585083Sgblack@eecs.umich.edu # Globals to stick the output in 1595083Sgblack@eecs.umich.edu global header_output 1605083Sgblack@eecs.umich.edu global decoder_output 1615083Sgblack@eecs.umich.edu global exec_output 1625083Sgblack@eecs.umich.edu 1635083Sgblack@eecs.umich.edu # Stick all the code together so it can be searched at once 1645083Sgblack@eecs.umich.edu allCode = "|".join((code, flag_code, cond_check, else_code)) 1655083Sgblack@eecs.umich.edu 1665083Sgblack@eecs.umich.edu # If there's something optional to do with flags, generate 1675083Sgblack@eecs.umich.edu # a version without it and fix up this version to use it. 1685083Sgblack@eecs.umich.edu if flag_code is not "" or cond_check is not "true": 1695083Sgblack@eecs.umich.edu self.buildCppClasses(name, Name, suffix, 1705083Sgblack@eecs.umich.edu code, "", "true", else_code) 1715083Sgblack@eecs.umich.edu suffix = "Flags" + suffix 1725083Sgblack@eecs.umich.edu 1735083Sgblack@eecs.umich.edu base = "X86ISA::FpOp" 1745083Sgblack@eecs.umich.edu 1755083Sgblack@eecs.umich.edu # Get everything ready for the substitution 1765083Sgblack@eecs.umich.edu iop_top = InstObjParams(name, Name + suffix + "Top", base, 1775083Sgblack@eecs.umich.edu {"code" : code, 1785083Sgblack@eecs.umich.edu "flag_code" : flag_code, 1795083Sgblack@eecs.umich.edu "cond_check" : cond_check, 1805083Sgblack@eecs.umich.edu "else_code" : else_code, 1815083Sgblack@eecs.umich.edu "top_code" : "TOP = (TOP + spm + 8) % 8;"}) 1825083Sgblack@eecs.umich.edu iop = InstObjParams(name, Name + suffix, base, 1835083Sgblack@eecs.umich.edu {"code" : code, 1845083Sgblack@eecs.umich.edu "flag_code" : flag_code, 1855083Sgblack@eecs.umich.edu "cond_check" : cond_check, 1865083Sgblack@eecs.umich.edu "else_code" : else_code, 1875083Sgblack@eecs.umich.edu "top_code" : ";"}) 1885083Sgblack@eecs.umich.edu 1895083Sgblack@eecs.umich.edu # Generate the actual code (finally!) 1905083Sgblack@eecs.umich.edu header_output += MicroFpOpDeclare.subst(iop_top) 1915083Sgblack@eecs.umich.edu decoder_output += MicroFpOpConstructor.subst(iop_top) 1925083Sgblack@eecs.umich.edu exec_output += MicroFpOpExecute.subst(iop_top) 1935083Sgblack@eecs.umich.edu header_output += MicroFpOpDeclare.subst(iop) 1945083Sgblack@eecs.umich.edu decoder_output += MicroFpOpConstructor.subst(iop) 1955083Sgblack@eecs.umich.edu exec_output += MicroFpOpExecute.subst(iop) 1965083Sgblack@eecs.umich.edu 1975083Sgblack@eecs.umich.edu 1985083Sgblack@eecs.umich.edu def __new__(mcls, Name, bases, dict): 1995083Sgblack@eecs.umich.edu abstract = False 2005083Sgblack@eecs.umich.edu name = Name.lower() 2015083Sgblack@eecs.umich.edu if "abstract" in dict: 2025083Sgblack@eecs.umich.edu abstract = dict['abstract'] 2035083Sgblack@eecs.umich.edu del dict['abstract'] 2045083Sgblack@eecs.umich.edu 2055083Sgblack@eecs.umich.edu cls = super(FpOpMeta, mcls).__new__(mcls, Name, bases, dict) 2065083Sgblack@eecs.umich.edu if not abstract: 2075083Sgblack@eecs.umich.edu cls.className = Name 2085083Sgblack@eecs.umich.edu cls.mnemonic = name 2095083Sgblack@eecs.umich.edu code = cls.code 2105083Sgblack@eecs.umich.edu flag_code = cls.flag_code 2115083Sgblack@eecs.umich.edu cond_check = cls.cond_check 2125083Sgblack@eecs.umich.edu else_code = cls.else_code 2135083Sgblack@eecs.umich.edu 2145083Sgblack@eecs.umich.edu # Set up the C++ classes 2155083Sgblack@eecs.umich.edu mcls.buildCppClasses(cls, name, Name, "", 2165083Sgblack@eecs.umich.edu code, flag_code, cond_check, else_code) 2175083Sgblack@eecs.umich.edu 2185083Sgblack@eecs.umich.edu # Hook into the microassembler dict 2195083Sgblack@eecs.umich.edu global microopClasses 2205083Sgblack@eecs.umich.edu microopClasses[name] = cls 2215083Sgblack@eecs.umich.edu 2225083Sgblack@eecs.umich.edu return cls 2235083Sgblack@eecs.umich.edu 2245083Sgblack@eecs.umich.edu 2255083Sgblack@eecs.umich.edu class FpOp(X86Microop): 2265083Sgblack@eecs.umich.edu __metaclass__ = FpOpMeta 2275083Sgblack@eecs.umich.edu # This class itself doesn't act as a microop 2285083Sgblack@eecs.umich.edu abstract = True 2295083Sgblack@eecs.umich.edu 2305083Sgblack@eecs.umich.edu # Default template parameter values 2315083Sgblack@eecs.umich.edu flag_code = "" 2325083Sgblack@eecs.umich.edu cond_check = "true" 2335083Sgblack@eecs.umich.edu else_code = ";" 2345083Sgblack@eecs.umich.edu 2355083Sgblack@eecs.umich.edu def __init__(self, dest, src1, src2, spm=0, \ 2365083Sgblack@eecs.umich.edu SetStatus=False, dataSize="env.dataSize"): 2375083Sgblack@eecs.umich.edu self.dest = dest 2385083Sgblack@eecs.umich.edu self.src1 = src1 2395083Sgblack@eecs.umich.edu self.src2 = src2 2405083Sgblack@eecs.umich.edu self.spm = spm 2415083Sgblack@eecs.umich.edu self.dataSize = dataSize 2425083Sgblack@eecs.umich.edu if SetStatus: 2435083Sgblack@eecs.umich.edu self.className += "Flags" 2445083Sgblack@eecs.umich.edu if spm: 2455083Sgblack@eecs.umich.edu self.className += "Top" 2465083Sgblack@eecs.umich.edu 2475083Sgblack@eecs.umich.edu def getAllocator(self, *microFlags): 2485083Sgblack@eecs.umich.edu return '''new %(class_name)s(machInst, mnemonic 2495083Sgblack@eecs.umich.edu %(flags)s, %(src1)s, %(src2)s, %(dest)s, 2505083Sgblack@eecs.umich.edu %(dataSize)s, %(spm)d)''' % { 2515083Sgblack@eecs.umich.edu "class_name" : self.className, 2525083Sgblack@eecs.umich.edu "flags" : self.microFlagsText(microFlags), 2535083Sgblack@eecs.umich.edu "src1" : self.src1, "src2" : self.src2, 2545083Sgblack@eecs.umich.edu "dest" : self.dest, 2555083Sgblack@eecs.umich.edu "dataSize" : self.dataSize, 2565083Sgblack@eecs.umich.edu "spm" : self.spm} 2575083Sgblack@eecs.umich.edu 2585083Sgblack@eecs.umich.edu class Movfp(FpOp): 2595083Sgblack@eecs.umich.edu def __init__(self, dest, src1, flags=0, spm=0, \ 2605083Sgblack@eecs.umich.edu SetStatus=False, dataSize="env.dataSize"): 2615083Sgblack@eecs.umich.edu super(Movfp, self).__init__(dest, src1, flags, \ 2625083Sgblack@eecs.umich.edu spm, SetStatus, dataSize) 2635083Sgblack@eecs.umich.edu code = 'FpDestReg.uqw = FpSrcReg2.uqw;' 2645083Sgblack@eecs.umich.edu else_code = 'FpDestReg.uqw = FpDestReg.uqw;' 2655083Sgblack@eecs.umich.edu cond_check = "checkCondition(ccFlagBits, src2)" 2665083Sgblack@eecs.umich.edu 2675083Sgblack@eecs.umich.edu class Xorfp(FpOp): 2685083Sgblack@eecs.umich.edu code = 'FpDestReg.uqw = FpSrcReg1.uqw ^ FpSrcReg2.uqw;' 2695083Sgblack@eecs.umich.edu 2705083Sgblack@eecs.umich.edu class Sqrtfp(FpOp): 2715083Sgblack@eecs.umich.edu code = 'FpDestReg = sqrt(FpSrcReg2);' 2725083Sgblack@eecs.umich.edu 2735083Sgblack@eecs.umich.edu # Conversion microops 2745083Sgblack@eecs.umich.edu class ConvOp(FpOp): 2755083Sgblack@eecs.umich.edu abstract = True 2765083Sgblack@eecs.umich.edu def __init__(self, dest, src1): 2775083Sgblack@eecs.umich.edu super(ConvOp, self).__init__(dest, src1, "(int)FLOATREG_MICROFP0") 2785083Sgblack@eecs.umich.edu 2795083Sgblack@eecs.umich.edu # These probably shouldn't look at the ExtMachInst directly to figure 2805083Sgblack@eecs.umich.edu # out what size to use and should instead delegate that to the macroop's 2815083Sgblack@eecs.umich.edu # constructor. That would be more efficient, and it would make the 2825083Sgblack@eecs.umich.edu # microops a little more modular. 2835083Sgblack@eecs.umich.edu class cvtf_i2d(ConvOp): 2845083Sgblack@eecs.umich.edu code = ''' 2855083Sgblack@eecs.umich.edu X86IntReg intReg = SSrcReg1; 2865083Sgblack@eecs.umich.edu if (REX_W) 2875083Sgblack@eecs.umich.edu FpDestReg = intReg.SR; 2885083Sgblack@eecs.umich.edu else 2895083Sgblack@eecs.umich.edu FpDestReg = intReg.SE; 2905083Sgblack@eecs.umich.edu ''' 2915083Sgblack@eecs.umich.edu 2925083Sgblack@eecs.umich.edu class cvtf_i2d_hi(ConvOp): 2935083Sgblack@eecs.umich.edu code = 'FpDestReg = bits(SSrcReg1, 63, 32);' 2945083Sgblack@eecs.umich.edu 2955083Sgblack@eecs.umich.edu class cvtf_d2i(ConvOp): 2965083Sgblack@eecs.umich.edu code = ''' 2975083Sgblack@eecs.umich.edu int64_t intSrcReg1 = static_cast<int64_t>(FpSrcReg1); 2985083Sgblack@eecs.umich.edu if (REX_W) 2995083Sgblack@eecs.umich.edu SDestReg = intSrcReg1; 3005083Sgblack@eecs.umich.edu else 3015083Sgblack@eecs.umich.edu SDestReg = merge(SDestReg, intSrcReg1, 4); 3025083Sgblack@eecs.umich.edu ''' 3035083Sgblack@eecs.umich.edu 3045083Sgblack@eecs.umich.edu # These need to consider size at some point. They'll always use doubles 3055083Sgblack@eecs.umich.edu # for the moment. 3065083Sgblack@eecs.umich.edu class addfp(FpOp): 3075083Sgblack@eecs.umich.edu code = 'FpDestReg = FpSrcReg1 + FpSrcReg2;' 3085083Sgblack@eecs.umich.edu 3095083Sgblack@eecs.umich.edu class mulfp(FpOp): 3105083Sgblack@eecs.umich.edu code = 'FpDestReg = FpSrcReg1 * FpSrcReg2;' 3115083Sgblack@eecs.umich.edu 3125083Sgblack@eecs.umich.edu class divfp(FpOp): 3135083Sgblack@eecs.umich.edu code = 'FpDestReg = FpSrcReg1 / FpSrcReg2;' 3145083Sgblack@eecs.umich.edu 3155083Sgblack@eecs.umich.edu class subfp(FpOp): 3165083Sgblack@eecs.umich.edu code = 'FpDestReg = FpSrcReg1 - FpSrcReg2;' 3175083Sgblack@eecs.umich.edu 3185083Sgblack@eecs.umich.edu class Compfp(FpOp): 3195083Sgblack@eecs.umich.edu def __init__(self, src1, src2, spm=0, setStatus=False, \ 3205083Sgblack@eecs.umich.edu dataSize="env.dataSize"): 3215083Sgblack@eecs.umich.edu super(Compfp, self).__init__("(int)FLOATREG_MICROFP0", \ 3225083Sgblack@eecs.umich.edu src1, src2, spm, setStatus, dataSize) 3235083Sgblack@eecs.umich.edu # This class sets the condition codes in rflags according to the 3245083Sgblack@eecs.umich.edu # rules for comparing floating point. 3255083Sgblack@eecs.umich.edu code = ''' 3265083Sgblack@eecs.umich.edu // ZF PF CF 3275083Sgblack@eecs.umich.edu // Unordered 1 1 1 3285083Sgblack@eecs.umich.edu // Greater than 0 0 0 3295083Sgblack@eecs.umich.edu // Less than 0 0 1 3305083Sgblack@eecs.umich.edu // Equal 1 0 0 3315083Sgblack@eecs.umich.edu // OF = SF = AF = 0 3325083Sgblack@eecs.umich.edu ccFlagBits = ccFlagBits & ~(OFBit | SFBit | AFBit | 3335083Sgblack@eecs.umich.edu ZFBit | PFBit | CFBit); 3345083Sgblack@eecs.umich.edu if (isnan(FpSrcReg1) || isnan(FpSrcReg2)) 3355083Sgblack@eecs.umich.edu ccFlagBits = ccFlagBits | (ZFBit | PFBit | CFBit); 3365083Sgblack@eecs.umich.edu else if(FpSrcReg1 < FpSrcReg2) 3375083Sgblack@eecs.umich.edu ccFlagBits = ccFlagBits | CFBit; 3385083Sgblack@eecs.umich.edu else if(FpSrcReg1 == FpSrcReg2) 3395083Sgblack@eecs.umich.edu ccFlagBits = ccFlagBits | ZFBit; 3405083Sgblack@eecs.umich.edu ''' 3415083Sgblack@eecs.umich.edu}}; 342