vfp.hh revision 8229
17375Sgblack@eecs.umich.edu/* 27375Sgblack@eecs.umich.edu * Copyright (c) 2010 ARM Limited 37375Sgblack@eecs.umich.edu * All rights reserved 47375Sgblack@eecs.umich.edu * 57375Sgblack@eecs.umich.edu * The license below extends only to copyright in the software and shall 67375Sgblack@eecs.umich.edu * not be construed as granting a license to any other intellectual 77375Sgblack@eecs.umich.edu * property including but not limited to intellectual property relating 87375Sgblack@eecs.umich.edu * to a hardware implementation of the functionality of the software 97375Sgblack@eecs.umich.edu * licensed hereunder. You may use the software subject to the license 107375Sgblack@eecs.umich.edu * terms below provided that you ensure that this notice is replicated 117375Sgblack@eecs.umich.edu * unmodified and in its entirety in all distributions of the software, 127375Sgblack@eecs.umich.edu * modified or unmodified, in source code or in binary form. 137375Sgblack@eecs.umich.edu * 147375Sgblack@eecs.umich.edu * Redistribution and use in source and binary forms, with or without 157375Sgblack@eecs.umich.edu * modification, are permitted provided that the following conditions are 167375Sgblack@eecs.umich.edu * met: redistributions of source code must retain the above copyright 177375Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer; 187375Sgblack@eecs.umich.edu * redistributions in binary form must reproduce the above copyright 197375Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer in the 207375Sgblack@eecs.umich.edu * documentation and/or other materials provided with the distribution; 217375Sgblack@eecs.umich.edu * neither the name of the copyright holders nor the names of its 227375Sgblack@eecs.umich.edu * contributors may be used to endorse or promote products derived from 237375Sgblack@eecs.umich.edu * this software without specific prior written permission. 247375Sgblack@eecs.umich.edu * 257375Sgblack@eecs.umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 267375Sgblack@eecs.umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 277375Sgblack@eecs.umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 287375Sgblack@eecs.umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 297375Sgblack@eecs.umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 307375Sgblack@eecs.umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 317375Sgblack@eecs.umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 327375Sgblack@eecs.umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 337375Sgblack@eecs.umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 347375Sgblack@eecs.umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 357375Sgblack@eecs.umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 367375Sgblack@eecs.umich.edu * 377375Sgblack@eecs.umich.edu * Authors: Gabe Black 387375Sgblack@eecs.umich.edu */ 397375Sgblack@eecs.umich.edu 407375Sgblack@eecs.umich.edu#ifndef __ARCH_ARM_INSTS_VFP_HH__ 417375Sgblack@eecs.umich.edu#define __ARCH_ARM_INSTS_VFP_HH__ 427375Sgblack@eecs.umich.edu 438229Snate@binkert.org#include <fenv.h> 448229Snate@binkert.org 458229Snate@binkert.org#include <cmath> 468229Snate@binkert.org 477375Sgblack@eecs.umich.edu#include "arch/arm/insts/misc.hh" 487378Sgblack@eecs.umich.edu#include "arch/arm/miscregs.hh" 497375Sgblack@eecs.umich.edu 507384Sgblack@eecs.umich.edunamespace ArmISA 517384Sgblack@eecs.umich.edu{ 527384Sgblack@eecs.umich.edu 537375Sgblack@eecs.umich.eduenum VfpMicroMode { 547375Sgblack@eecs.umich.edu VfpNotAMicroop, 557375Sgblack@eecs.umich.edu VfpMicroop, 567375Sgblack@eecs.umich.edu VfpFirstMicroop, 577375Sgblack@eecs.umich.edu VfpLastMicroop 587375Sgblack@eecs.umich.edu}; 597375Sgblack@eecs.umich.edu 607375Sgblack@eecs.umich.edutemplate<class T> 617375Sgblack@eecs.umich.edustatic inline void 627375Sgblack@eecs.umich.edusetVfpMicroFlags(VfpMicroMode mode, T &flags) 637375Sgblack@eecs.umich.edu{ 647375Sgblack@eecs.umich.edu switch (mode) { 657375Sgblack@eecs.umich.edu case VfpMicroop: 667375Sgblack@eecs.umich.edu flags[StaticInst::IsMicroop] = true; 677375Sgblack@eecs.umich.edu break; 687375Sgblack@eecs.umich.edu case VfpFirstMicroop: 697375Sgblack@eecs.umich.edu flags[StaticInst::IsMicroop] = 707375Sgblack@eecs.umich.edu flags[StaticInst::IsFirstMicroop] = true; 717375Sgblack@eecs.umich.edu break; 727375Sgblack@eecs.umich.edu case VfpLastMicroop: 737375Sgblack@eecs.umich.edu flags[StaticInst::IsMicroop] = 747375Sgblack@eecs.umich.edu flags[StaticInst::IsLastMicroop] = true; 757375Sgblack@eecs.umich.edu break; 767375Sgblack@eecs.umich.edu case VfpNotAMicroop: 777375Sgblack@eecs.umich.edu break; 787375Sgblack@eecs.umich.edu } 797376Sgblack@eecs.umich.edu if (mode == VfpMicroop || mode == VfpFirstMicroop) { 807376Sgblack@eecs.umich.edu flags[StaticInst::IsDelayedCommit] = true; 817376Sgblack@eecs.umich.edu } 827375Sgblack@eecs.umich.edu} 837375Sgblack@eecs.umich.edu 847378Sgblack@eecs.umich.eduenum FeExceptionBit 857378Sgblack@eecs.umich.edu{ 867378Sgblack@eecs.umich.edu FeDivByZero = FE_DIVBYZERO, 877378Sgblack@eecs.umich.edu FeInexact = FE_INEXACT, 887378Sgblack@eecs.umich.edu FeInvalid = FE_INVALID, 897378Sgblack@eecs.umich.edu FeOverflow = FE_OVERFLOW, 907378Sgblack@eecs.umich.edu FeUnderflow = FE_UNDERFLOW, 917378Sgblack@eecs.umich.edu FeAllExceptions = FE_ALL_EXCEPT 927378Sgblack@eecs.umich.edu}; 937378Sgblack@eecs.umich.edu 947378Sgblack@eecs.umich.eduenum FeRoundingMode 957378Sgblack@eecs.umich.edu{ 967378Sgblack@eecs.umich.edu FeRoundDown = FE_DOWNWARD, 977378Sgblack@eecs.umich.edu FeRoundNearest = FE_TONEAREST, 987378Sgblack@eecs.umich.edu FeRoundZero = FE_TOWARDZERO, 997378Sgblack@eecs.umich.edu FeRoundUpward = FE_UPWARD 1007378Sgblack@eecs.umich.edu}; 1017378Sgblack@eecs.umich.edu 1027378Sgblack@eecs.umich.eduenum VfpRoundingMode 1037378Sgblack@eecs.umich.edu{ 1047378Sgblack@eecs.umich.edu VfpRoundNearest = 0, 1057378Sgblack@eecs.umich.edu VfpRoundUpward = 1, 1067378Sgblack@eecs.umich.edu VfpRoundDown = 2, 1077378Sgblack@eecs.umich.edu VfpRoundZero = 3 1087378Sgblack@eecs.umich.edu}; 1097378Sgblack@eecs.umich.edu 1107382Sgblack@eecs.umich.edutemplate <class fpType> 1117396Sgblack@eecs.umich.edustatic inline bool 1127396Sgblack@eecs.umich.eduflushToZero(fpType &op) 1137396Sgblack@eecs.umich.edu{ 1147396Sgblack@eecs.umich.edu fpType junk = 0.0; 1157396Sgblack@eecs.umich.edu if (std::fpclassify(op) == FP_SUBNORMAL) { 1167396Sgblack@eecs.umich.edu uint64_t bitMask = ULL(0x1) << (sizeof(fpType) * 8 - 1); 1177396Sgblack@eecs.umich.edu op = bitsToFp(fpToBits(op) & bitMask, junk); 1187396Sgblack@eecs.umich.edu return true; 1197396Sgblack@eecs.umich.edu } 1207396Sgblack@eecs.umich.edu return false; 1217396Sgblack@eecs.umich.edu} 1227396Sgblack@eecs.umich.edu 1237396Sgblack@eecs.umich.edutemplate <class fpType> 1247396Sgblack@eecs.umich.edustatic inline bool 1257396Sgblack@eecs.umich.eduflushToZero(fpType &op1, fpType &op2) 1267396Sgblack@eecs.umich.edu{ 1277396Sgblack@eecs.umich.edu bool flush1 = flushToZero(op1); 1287396Sgblack@eecs.umich.edu bool flush2 = flushToZero(op2); 1297396Sgblack@eecs.umich.edu return flush1 || flush2; 1307396Sgblack@eecs.umich.edu} 1317396Sgblack@eecs.umich.edu 1327397Sgblack@eecs.umich.edutemplate <class fpType> 1337397Sgblack@eecs.umich.edustatic inline void 1347397Sgblack@eecs.umich.eduvfpFlushToZero(FPSCR &fpscr, fpType &op) 1357397Sgblack@eecs.umich.edu{ 1367397Sgblack@eecs.umich.edu if (fpscr.fz == 1 && flushToZero(op)) { 1377397Sgblack@eecs.umich.edu fpscr.idc = 1; 1387397Sgblack@eecs.umich.edu } 1397397Sgblack@eecs.umich.edu} 1407397Sgblack@eecs.umich.edu 1417397Sgblack@eecs.umich.edutemplate <class fpType> 1427397Sgblack@eecs.umich.edustatic inline void 1437397Sgblack@eecs.umich.eduvfpFlushToZero(FPSCR &fpscr, fpType &op1, fpType &op2) 1447397Sgblack@eecs.umich.edu{ 1457397Sgblack@eecs.umich.edu vfpFlushToZero(fpscr, op1); 1467397Sgblack@eecs.umich.edu vfpFlushToZero(fpscr, op2); 1477397Sgblack@eecs.umich.edu} 1487397Sgblack@eecs.umich.edu 1497384Sgblack@eecs.umich.edustatic inline uint32_t 1507384Sgblack@eecs.umich.edufpToBits(float fp) 1517384Sgblack@eecs.umich.edu{ 1527384Sgblack@eecs.umich.edu union 1537384Sgblack@eecs.umich.edu { 1547384Sgblack@eecs.umich.edu float fp; 1557384Sgblack@eecs.umich.edu uint32_t bits; 1567384Sgblack@eecs.umich.edu } val; 1577384Sgblack@eecs.umich.edu val.fp = fp; 1587384Sgblack@eecs.umich.edu return val.bits; 1597384Sgblack@eecs.umich.edu} 1607384Sgblack@eecs.umich.edu 1617384Sgblack@eecs.umich.edustatic inline uint64_t 1627384Sgblack@eecs.umich.edufpToBits(double fp) 1637384Sgblack@eecs.umich.edu{ 1647384Sgblack@eecs.umich.edu union 1657384Sgblack@eecs.umich.edu { 1667384Sgblack@eecs.umich.edu double fp; 1677384Sgblack@eecs.umich.edu uint64_t bits; 1687384Sgblack@eecs.umich.edu } val; 1697384Sgblack@eecs.umich.edu val.fp = fp; 1707384Sgblack@eecs.umich.edu return val.bits; 1717384Sgblack@eecs.umich.edu} 1727384Sgblack@eecs.umich.edu 1737384Sgblack@eecs.umich.edustatic inline float 1747384Sgblack@eecs.umich.edubitsToFp(uint64_t bits, float junk) 1757384Sgblack@eecs.umich.edu{ 1767384Sgblack@eecs.umich.edu union 1777384Sgblack@eecs.umich.edu { 1787384Sgblack@eecs.umich.edu float fp; 1797384Sgblack@eecs.umich.edu uint32_t bits; 1807384Sgblack@eecs.umich.edu } val; 1817384Sgblack@eecs.umich.edu val.bits = bits; 1827384Sgblack@eecs.umich.edu return val.fp; 1837384Sgblack@eecs.umich.edu} 1847384Sgblack@eecs.umich.edu 1857384Sgblack@eecs.umich.edustatic inline double 1867384Sgblack@eecs.umich.edubitsToFp(uint64_t bits, double junk) 1877384Sgblack@eecs.umich.edu{ 1887384Sgblack@eecs.umich.edu union 1897384Sgblack@eecs.umich.edu { 1907384Sgblack@eecs.umich.edu double fp; 1917384Sgblack@eecs.umich.edu uint64_t bits; 1927384Sgblack@eecs.umich.edu } val; 1937384Sgblack@eecs.umich.edu val.bits = bits; 1947384Sgblack@eecs.umich.edu return val.fp; 1957384Sgblack@eecs.umich.edu} 1967384Sgblack@eecs.umich.edu 1977639Sgblack@eecs.umich.edutemplate <class fpType> 1987639Sgblack@eecs.umich.edustatic bool 1997639Sgblack@eecs.umich.eduisSnan(fpType val) 2007639Sgblack@eecs.umich.edu{ 2017639Sgblack@eecs.umich.edu const bool single = (sizeof(fpType) == sizeof(float)); 2027639Sgblack@eecs.umich.edu const uint64_t qnan = 2037639Sgblack@eecs.umich.edu single ? 0x7fc00000 : ULL(0x7ff8000000000000); 2047639Sgblack@eecs.umich.edu return std::isnan(val) && ((fpToBits(val) & qnan) != qnan); 2057639Sgblack@eecs.umich.edu} 2067639Sgblack@eecs.umich.edu 2077396Sgblack@eecs.umich.edutypedef int VfpSavedState; 2087396Sgblack@eecs.umich.edu 2097430Sgblack@eecs.umich.eduVfpSavedState prepFpState(uint32_t rMode); 2107639Sgblack@eecs.umich.eduvoid finishVfp(FPSCR &fpscr, VfpSavedState state, bool flush); 2117396Sgblack@eecs.umich.edu 2127384Sgblack@eecs.umich.edutemplate <class fpType> 2137430Sgblack@eecs.umich.edufpType fixDest(FPSCR fpscr, fpType val, fpType op1); 2147386Sgblack@eecs.umich.edu 2157386Sgblack@eecs.umich.edutemplate <class fpType> 2167430Sgblack@eecs.umich.edufpType fixDest(FPSCR fpscr, fpType val, fpType op1, fpType op2); 2177384Sgblack@eecs.umich.edu 2187386Sgblack@eecs.umich.edutemplate <class fpType> 2197430Sgblack@eecs.umich.edufpType fixDivDest(FPSCR fpscr, fpType val, fpType op1, fpType op2); 2207386Sgblack@eecs.umich.edu 2217430Sgblack@eecs.umich.edufloat fixFpDFpSDest(FPSCR fpscr, double val); 2227430Sgblack@eecs.umich.edudouble fixFpSFpDDest(FPSCR fpscr, float val); 2237386Sgblack@eecs.umich.edu 2247639Sgblack@eecs.umich.eduuint16_t vcvtFpSFpH(FPSCR &fpscr, bool flush, bool defaultNan, 2257639Sgblack@eecs.umich.edu uint32_t rMode, bool ahp, float op); 2267639Sgblack@eecs.umich.edufloat vcvtFpHFpS(FPSCR &fpscr, bool defaultNan, bool ahp, uint16_t op); 2277398Sgblack@eecs.umich.edu 2287396Sgblack@eecs.umich.edustatic inline double 2297396Sgblack@eecs.umich.edumakeDouble(uint32_t low, uint32_t high) 2307396Sgblack@eecs.umich.edu{ 2317396Sgblack@eecs.umich.edu double junk = 0.0; 2327396Sgblack@eecs.umich.edu return bitsToFp((uint64_t)low | ((uint64_t)high << 32), junk); 2337396Sgblack@eecs.umich.edu} 2347396Sgblack@eecs.umich.edu 2357396Sgblack@eecs.umich.edustatic inline uint32_t 2367396Sgblack@eecs.umich.edulowFromDouble(double val) 2377396Sgblack@eecs.umich.edu{ 2387396Sgblack@eecs.umich.edu return fpToBits(val); 2397396Sgblack@eecs.umich.edu} 2407396Sgblack@eecs.umich.edu 2417396Sgblack@eecs.umich.edustatic inline uint32_t 2427396Sgblack@eecs.umich.eduhighFromDouble(double val) 2437396Sgblack@eecs.umich.edu{ 2447396Sgblack@eecs.umich.edu return fpToBits(val) >> 32; 2457396Sgblack@eecs.umich.edu} 2467396Sgblack@eecs.umich.edu 2477430Sgblack@eecs.umich.eduuint64_t vfpFpSToFixed(float val, bool isSigned, bool half, 2487430Sgblack@eecs.umich.edu uint8_t imm, bool rzero = true); 2497639Sgblack@eecs.umich.edufloat vfpUFixedToFpS(bool flush, bool defaultNan, 2507639Sgblack@eecs.umich.edu uint32_t val, bool half, uint8_t imm); 2517639Sgblack@eecs.umich.edufloat vfpSFixedToFpS(bool flush, bool defaultNan, 2527639Sgblack@eecs.umich.edu int32_t val, bool half, uint8_t imm); 2537382Sgblack@eecs.umich.edu 2547430Sgblack@eecs.umich.eduuint64_t vfpFpDToFixed(double val, bool isSigned, bool half, 2557430Sgblack@eecs.umich.edu uint8_t imm, bool rzero = true); 2567639Sgblack@eecs.umich.edudouble vfpUFixedToFpD(bool flush, bool defaultNan, 2577639Sgblack@eecs.umich.edu uint32_t val, bool half, uint8_t imm); 2587639Sgblack@eecs.umich.edudouble vfpSFixedToFpD(bool flush, bool defaultNan, 2597639Sgblack@eecs.umich.edu int32_t val, bool half, uint8_t imm); 2607639Sgblack@eecs.umich.edu 2617639Sgblack@eecs.umich.edufloat fprSqrtEstimate(FPSCR &fpscr, float op); 2627639Sgblack@eecs.umich.eduuint32_t unsignedRSqrtEstimate(uint32_t op); 2637639Sgblack@eecs.umich.edu 2647639Sgblack@eecs.umich.edufloat fpRecipEstimate(FPSCR &fpscr, float op); 2657639Sgblack@eecs.umich.eduuint32_t unsignedRecipEstimate(uint32_t op); 2667379Sgblack@eecs.umich.edu 2677376Sgblack@eecs.umich.educlass VfpMacroOp : public PredMacroOp 2687376Sgblack@eecs.umich.edu{ 2697376Sgblack@eecs.umich.edu public: 2707376Sgblack@eecs.umich.edu static bool 2717376Sgblack@eecs.umich.edu inScalarBank(IntRegIndex idx) 2727376Sgblack@eecs.umich.edu { 2737376Sgblack@eecs.umich.edu return (idx % 32) < 8; 2747376Sgblack@eecs.umich.edu } 2757376Sgblack@eecs.umich.edu 2767376Sgblack@eecs.umich.edu protected: 2777376Sgblack@eecs.umich.edu bool wide; 2787376Sgblack@eecs.umich.edu 2797376Sgblack@eecs.umich.edu VfpMacroOp(const char *mnem, ExtMachInst _machInst, 2807376Sgblack@eecs.umich.edu OpClass __opClass, bool _wide) : 2817376Sgblack@eecs.umich.edu PredMacroOp(mnem, _machInst, __opClass), wide(_wide) 2827376Sgblack@eecs.umich.edu {} 2837376Sgblack@eecs.umich.edu 2847430Sgblack@eecs.umich.edu IntRegIndex addStride(IntRegIndex idx, unsigned stride); 2857430Sgblack@eecs.umich.edu void nextIdxs(IntRegIndex &dest, IntRegIndex &op1, IntRegIndex &op2); 2867430Sgblack@eecs.umich.edu void nextIdxs(IntRegIndex &dest, IntRegIndex &op1); 2877430Sgblack@eecs.umich.edu void nextIdxs(IntRegIndex &dest); 2887376Sgblack@eecs.umich.edu}; 2897376Sgblack@eecs.umich.edu 2907396Sgblack@eecs.umich.edustatic inline float 2917396Sgblack@eecs.umich.edufpAddS(float a, float b) 2927396Sgblack@eecs.umich.edu{ 2937396Sgblack@eecs.umich.edu return a + b; 2947396Sgblack@eecs.umich.edu} 2957396Sgblack@eecs.umich.edu 2967396Sgblack@eecs.umich.edustatic inline double 2977396Sgblack@eecs.umich.edufpAddD(double a, double b) 2987396Sgblack@eecs.umich.edu{ 2997396Sgblack@eecs.umich.edu return a + b; 3007396Sgblack@eecs.umich.edu} 3017396Sgblack@eecs.umich.edu 3027396Sgblack@eecs.umich.edustatic inline float 3037396Sgblack@eecs.umich.edufpSubS(float a, float b) 3047396Sgblack@eecs.umich.edu{ 3057396Sgblack@eecs.umich.edu return a - b; 3067396Sgblack@eecs.umich.edu} 3077396Sgblack@eecs.umich.edu 3087396Sgblack@eecs.umich.edustatic inline double 3097396Sgblack@eecs.umich.edufpSubD(double a, double b) 3107396Sgblack@eecs.umich.edu{ 3117396Sgblack@eecs.umich.edu return a - b; 3127396Sgblack@eecs.umich.edu} 3137396Sgblack@eecs.umich.edu 3147396Sgblack@eecs.umich.edustatic inline float 3157396Sgblack@eecs.umich.edufpDivS(float a, float b) 3167396Sgblack@eecs.umich.edu{ 3177396Sgblack@eecs.umich.edu return a / b; 3187396Sgblack@eecs.umich.edu} 3197396Sgblack@eecs.umich.edu 3207396Sgblack@eecs.umich.edustatic inline double 3217396Sgblack@eecs.umich.edufpDivD(double a, double b) 3227396Sgblack@eecs.umich.edu{ 3237396Sgblack@eecs.umich.edu return a / b; 3247396Sgblack@eecs.umich.edu} 3257396Sgblack@eecs.umich.edu 3267396Sgblack@eecs.umich.edustatic inline float 3277396Sgblack@eecs.umich.edufpMulS(float a, float b) 3287396Sgblack@eecs.umich.edu{ 3297396Sgblack@eecs.umich.edu return a * b; 3307396Sgblack@eecs.umich.edu} 3317396Sgblack@eecs.umich.edu 3327396Sgblack@eecs.umich.edustatic inline double 3337396Sgblack@eecs.umich.edufpMulD(double a, double b) 3347396Sgblack@eecs.umich.edu{ 3357396Sgblack@eecs.umich.edu return a * b; 3367396Sgblack@eecs.umich.edu} 3377396Sgblack@eecs.umich.edu 3387639Sgblack@eecs.umich.edustatic inline float 3397639Sgblack@eecs.umich.edufpMaxS(float a, float b) 3407639Sgblack@eecs.umich.edu{ 3417639Sgblack@eecs.umich.edu // Handle comparisons of +0 and -0. 3427639Sgblack@eecs.umich.edu if (!std::signbit(a) && std::signbit(b)) 3437639Sgblack@eecs.umich.edu return a; 3447639Sgblack@eecs.umich.edu return fmaxf(a, b); 3457639Sgblack@eecs.umich.edu} 3467639Sgblack@eecs.umich.edu 3477639Sgblack@eecs.umich.edustatic inline float 3487639Sgblack@eecs.umich.edufpMinS(float a, float b) 3497639Sgblack@eecs.umich.edu{ 3507639Sgblack@eecs.umich.edu // Handle comparisons of +0 and -0. 3517639Sgblack@eecs.umich.edu if (std::signbit(a) && !std::signbit(b)) 3527639Sgblack@eecs.umich.edu return a; 3537639Sgblack@eecs.umich.edu return fminf(a, b); 3547639Sgblack@eecs.umich.edu} 3557639Sgblack@eecs.umich.edu 3567639Sgblack@eecs.umich.edustatic inline float 3577639Sgblack@eecs.umich.edufpRSqrtsS(float a, float b) 3587639Sgblack@eecs.umich.edu{ 3597639Sgblack@eecs.umich.edu int fpClassA = std::fpclassify(a); 3607639Sgblack@eecs.umich.edu int fpClassB = std::fpclassify(b); 3617639Sgblack@eecs.umich.edu float aXb; 3627639Sgblack@eecs.umich.edu int fpClassAxB; 3637639Sgblack@eecs.umich.edu 3647639Sgblack@eecs.umich.edu if ((fpClassA == FP_ZERO && fpClassB == FP_INFINITE) || 3657639Sgblack@eecs.umich.edu (fpClassA == FP_INFINITE && fpClassB == FP_ZERO)) { 3667639Sgblack@eecs.umich.edu return 1.5; 3677639Sgblack@eecs.umich.edu } 3687639Sgblack@eecs.umich.edu aXb = a*b; 3697639Sgblack@eecs.umich.edu fpClassAxB = std::fpclassify(aXb); 3707639Sgblack@eecs.umich.edu if(fpClassAxB == FP_SUBNORMAL) { 3717639Sgblack@eecs.umich.edu feraiseexcept(FeUnderflow); 3727639Sgblack@eecs.umich.edu return 1.5; 3737639Sgblack@eecs.umich.edu } 3747639Sgblack@eecs.umich.edu return (3.0 - (a * b)) / 2.0; 3757639Sgblack@eecs.umich.edu} 3767639Sgblack@eecs.umich.edu 3777639Sgblack@eecs.umich.edustatic inline float 3787639Sgblack@eecs.umich.edufpRecpsS(float a, float b) 3797639Sgblack@eecs.umich.edu{ 3807639Sgblack@eecs.umich.edu int fpClassA = std::fpclassify(a); 3817639Sgblack@eecs.umich.edu int fpClassB = std::fpclassify(b); 3827639Sgblack@eecs.umich.edu float aXb; 3837639Sgblack@eecs.umich.edu int fpClassAxB; 3847639Sgblack@eecs.umich.edu 3857639Sgblack@eecs.umich.edu if ((fpClassA == FP_ZERO && fpClassB == FP_INFINITE) || 3867639Sgblack@eecs.umich.edu (fpClassA == FP_INFINITE && fpClassB == FP_ZERO)) { 3877639Sgblack@eecs.umich.edu return 2.0; 3887639Sgblack@eecs.umich.edu } 3897639Sgblack@eecs.umich.edu aXb = a*b; 3907639Sgblack@eecs.umich.edu fpClassAxB = std::fpclassify(aXb); 3917639Sgblack@eecs.umich.edu if(fpClassAxB == FP_SUBNORMAL) { 3927639Sgblack@eecs.umich.edu feraiseexcept(FeUnderflow); 3937639Sgblack@eecs.umich.edu return 2.0; 3947639Sgblack@eecs.umich.edu } 3957639Sgblack@eecs.umich.edu return 2.0 - (a * b); 3967639Sgblack@eecs.umich.edu} 3977639Sgblack@eecs.umich.edu 3987396Sgblack@eecs.umich.educlass FpOp : public PredOp 3997375Sgblack@eecs.umich.edu{ 4007375Sgblack@eecs.umich.edu protected: 4017396Sgblack@eecs.umich.edu FpOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass) : 4027396Sgblack@eecs.umich.edu PredOp(mnem, _machInst, __opClass) 4037396Sgblack@eecs.umich.edu {} 4047396Sgblack@eecs.umich.edu 4057396Sgblack@eecs.umich.edu virtual float 4067396Sgblack@eecs.umich.edu doOp(float op1, float op2) const 4077396Sgblack@eecs.umich.edu { 4087396Sgblack@eecs.umich.edu panic("Unimplemented version of doOp called.\n"); 4097396Sgblack@eecs.umich.edu } 4107396Sgblack@eecs.umich.edu 4117396Sgblack@eecs.umich.edu virtual float 4127396Sgblack@eecs.umich.edu doOp(float op1) const 4137396Sgblack@eecs.umich.edu { 4147396Sgblack@eecs.umich.edu panic("Unimplemented version of doOp called.\n"); 4157396Sgblack@eecs.umich.edu } 4167396Sgblack@eecs.umich.edu 4177396Sgblack@eecs.umich.edu virtual double 4187396Sgblack@eecs.umich.edu doOp(double op1, double op2) const 4197396Sgblack@eecs.umich.edu { 4207396Sgblack@eecs.umich.edu panic("Unimplemented version of doOp called.\n"); 4217396Sgblack@eecs.umich.edu } 4227396Sgblack@eecs.umich.edu 4237396Sgblack@eecs.umich.edu virtual double 4247396Sgblack@eecs.umich.edu doOp(double op1) const 4257396Sgblack@eecs.umich.edu { 4267396Sgblack@eecs.umich.edu panic("Unimplemented version of doOp called.\n"); 4277396Sgblack@eecs.umich.edu } 4287396Sgblack@eecs.umich.edu 4297396Sgblack@eecs.umich.edu double 4307396Sgblack@eecs.umich.edu dbl(uint32_t low, uint32_t high) const 4317396Sgblack@eecs.umich.edu { 4327396Sgblack@eecs.umich.edu double junk = 0.0; 4337396Sgblack@eecs.umich.edu return bitsToFp((uint64_t)low | ((uint64_t)high << 32), junk); 4347396Sgblack@eecs.umich.edu } 4357396Sgblack@eecs.umich.edu 4367396Sgblack@eecs.umich.edu uint32_t 4377396Sgblack@eecs.umich.edu dblLow(double val) const 4387396Sgblack@eecs.umich.edu { 4397396Sgblack@eecs.umich.edu return fpToBits(val); 4407396Sgblack@eecs.umich.edu } 4417396Sgblack@eecs.umich.edu 4427396Sgblack@eecs.umich.edu uint32_t 4437396Sgblack@eecs.umich.edu dblHi(double val) const 4447396Sgblack@eecs.umich.edu { 4457396Sgblack@eecs.umich.edu return fpToBits(val) >> 32; 4467396Sgblack@eecs.umich.edu } 4477396Sgblack@eecs.umich.edu 4487396Sgblack@eecs.umich.edu template <class fpType> 4497396Sgblack@eecs.umich.edu fpType 4507639Sgblack@eecs.umich.edu processNans(FPSCR &fpscr, bool &done, bool defaultNan, 4517639Sgblack@eecs.umich.edu fpType op1, fpType op2) const; 4527639Sgblack@eecs.umich.edu 4537639Sgblack@eecs.umich.edu template <class fpType> 4547639Sgblack@eecs.umich.edu fpType 4557396Sgblack@eecs.umich.edu binaryOp(FPSCR &fpscr, fpType op1, fpType op2, 4567396Sgblack@eecs.umich.edu fpType (*func)(fpType, fpType), 4577639Sgblack@eecs.umich.edu bool flush, bool defaultNan, uint32_t rMode) const; 4587396Sgblack@eecs.umich.edu 4597396Sgblack@eecs.umich.edu template <class fpType> 4607396Sgblack@eecs.umich.edu fpType 4617396Sgblack@eecs.umich.edu unaryOp(FPSCR &fpscr, fpType op1, 4627396Sgblack@eecs.umich.edu fpType (*func)(fpType), 4637430Sgblack@eecs.umich.edu bool flush, uint32_t rMode) const; 4647720Sgblack@eecs.umich.edu 4657720Sgblack@eecs.umich.edu void 4667720Sgblack@eecs.umich.edu advancePC(PCState &pcState) const 4677720Sgblack@eecs.umich.edu { 4687720Sgblack@eecs.umich.edu if (flags[IsLastMicroop]) { 4697720Sgblack@eecs.umich.edu pcState.uEnd(); 4707720Sgblack@eecs.umich.edu } else if (flags[IsMicroop]) { 4717720Sgblack@eecs.umich.edu pcState.uAdvance(); 4727720Sgblack@eecs.umich.edu } else { 4737720Sgblack@eecs.umich.edu pcState.advance(); 4747720Sgblack@eecs.umich.edu } 4757720Sgblack@eecs.umich.edu } 4767396Sgblack@eecs.umich.edu}; 4777396Sgblack@eecs.umich.edu 4787396Sgblack@eecs.umich.educlass FpRegRegOp : public FpOp 4797396Sgblack@eecs.umich.edu{ 4807396Sgblack@eecs.umich.edu protected: 4817396Sgblack@eecs.umich.edu IntRegIndex dest; 4827396Sgblack@eecs.umich.edu IntRegIndex op1; 4837396Sgblack@eecs.umich.edu 4847396Sgblack@eecs.umich.edu FpRegRegOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass, 4857396Sgblack@eecs.umich.edu IntRegIndex _dest, IntRegIndex _op1, 4867396Sgblack@eecs.umich.edu VfpMicroMode mode = VfpNotAMicroop) : 4877396Sgblack@eecs.umich.edu FpOp(mnem, _machInst, __opClass), dest(_dest), op1(_op1) 4887375Sgblack@eecs.umich.edu { 4897375Sgblack@eecs.umich.edu setVfpMicroFlags(mode, flags); 4907375Sgblack@eecs.umich.edu } 4917396Sgblack@eecs.umich.edu 4927396Sgblack@eecs.umich.edu std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const; 4937375Sgblack@eecs.umich.edu}; 4947375Sgblack@eecs.umich.edu 4957396Sgblack@eecs.umich.educlass FpRegImmOp : public FpOp 4967375Sgblack@eecs.umich.edu{ 4977375Sgblack@eecs.umich.edu protected: 4987396Sgblack@eecs.umich.edu IntRegIndex dest; 4997396Sgblack@eecs.umich.edu uint64_t imm; 5007396Sgblack@eecs.umich.edu 5017396Sgblack@eecs.umich.edu FpRegImmOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass, 5027396Sgblack@eecs.umich.edu IntRegIndex _dest, uint64_t _imm, 5037396Sgblack@eecs.umich.edu VfpMicroMode mode = VfpNotAMicroop) : 5047396Sgblack@eecs.umich.edu FpOp(mnem, _machInst, __opClass), dest(_dest), imm(_imm) 5057375Sgblack@eecs.umich.edu { 5067375Sgblack@eecs.umich.edu setVfpMicroFlags(mode, flags); 5077375Sgblack@eecs.umich.edu } 5087396Sgblack@eecs.umich.edu 5097396Sgblack@eecs.umich.edu std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const; 5107375Sgblack@eecs.umich.edu}; 5117375Sgblack@eecs.umich.edu 5127396Sgblack@eecs.umich.educlass FpRegRegImmOp : public FpOp 5137375Sgblack@eecs.umich.edu{ 5147375Sgblack@eecs.umich.edu protected: 5157396Sgblack@eecs.umich.edu IntRegIndex dest; 5167396Sgblack@eecs.umich.edu IntRegIndex op1; 5177396Sgblack@eecs.umich.edu uint64_t imm; 5187396Sgblack@eecs.umich.edu 5197396Sgblack@eecs.umich.edu FpRegRegImmOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass, 5207396Sgblack@eecs.umich.edu IntRegIndex _dest, IntRegIndex _op1, 5217396Sgblack@eecs.umich.edu uint64_t _imm, VfpMicroMode mode = VfpNotAMicroop) : 5227396Sgblack@eecs.umich.edu FpOp(mnem, _machInst, __opClass), dest(_dest), op1(_op1), imm(_imm) 5237375Sgblack@eecs.umich.edu { 5247375Sgblack@eecs.umich.edu setVfpMicroFlags(mode, flags); 5257375Sgblack@eecs.umich.edu } 5267396Sgblack@eecs.umich.edu 5277396Sgblack@eecs.umich.edu std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const; 5287375Sgblack@eecs.umich.edu}; 5297375Sgblack@eecs.umich.edu 5307396Sgblack@eecs.umich.educlass FpRegRegRegOp : public FpOp 5317375Sgblack@eecs.umich.edu{ 5327375Sgblack@eecs.umich.edu protected: 5337396Sgblack@eecs.umich.edu IntRegIndex dest; 5347396Sgblack@eecs.umich.edu IntRegIndex op1; 5357396Sgblack@eecs.umich.edu IntRegIndex op2; 5367396Sgblack@eecs.umich.edu 5377396Sgblack@eecs.umich.edu FpRegRegRegOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass, 5387396Sgblack@eecs.umich.edu IntRegIndex _dest, IntRegIndex _op1, IntRegIndex _op2, 5397396Sgblack@eecs.umich.edu VfpMicroMode mode = VfpNotAMicroop) : 5407396Sgblack@eecs.umich.edu FpOp(mnem, _machInst, __opClass), dest(_dest), op1(_op1), op2(_op2) 5417375Sgblack@eecs.umich.edu { 5427375Sgblack@eecs.umich.edu setVfpMicroFlags(mode, flags); 5437375Sgblack@eecs.umich.edu } 5447396Sgblack@eecs.umich.edu 5457396Sgblack@eecs.umich.edu std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const; 5467375Sgblack@eecs.umich.edu}; 5477375Sgblack@eecs.umich.edu 5487639Sgblack@eecs.umich.educlass FpRegRegRegImmOp : public FpOp 5497639Sgblack@eecs.umich.edu{ 5507639Sgblack@eecs.umich.edu protected: 5517639Sgblack@eecs.umich.edu IntRegIndex dest; 5527639Sgblack@eecs.umich.edu IntRegIndex op1; 5537639Sgblack@eecs.umich.edu IntRegIndex op2; 5547639Sgblack@eecs.umich.edu uint64_t imm; 5557639Sgblack@eecs.umich.edu 5567639Sgblack@eecs.umich.edu FpRegRegRegImmOp(const char *mnem, ExtMachInst _machInst, 5577639Sgblack@eecs.umich.edu OpClass __opClass, IntRegIndex _dest, 5587639Sgblack@eecs.umich.edu IntRegIndex _op1, IntRegIndex _op2, 5597639Sgblack@eecs.umich.edu uint64_t _imm, VfpMicroMode mode = VfpNotAMicroop) : 5607639Sgblack@eecs.umich.edu FpOp(mnem, _machInst, __opClass), 5617639Sgblack@eecs.umich.edu dest(_dest), op1(_op1), op2(_op2), imm(_imm) 5627639Sgblack@eecs.umich.edu { 5637639Sgblack@eecs.umich.edu setVfpMicroFlags(mode, flags); 5647639Sgblack@eecs.umich.edu } 5657639Sgblack@eecs.umich.edu 5667639Sgblack@eecs.umich.edu std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const; 5677639Sgblack@eecs.umich.edu}; 5687639Sgblack@eecs.umich.edu 5697384Sgblack@eecs.umich.edu} 5707384Sgblack@eecs.umich.edu 5717375Sgblack@eecs.umich.edu#endif //__ARCH_ARM_INSTS_VFP_HH__ 572