vfp.hh revision 7397
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 437375Sgblack@eecs.umich.edu#include "arch/arm/insts/misc.hh" 447378Sgblack@eecs.umich.edu#include "arch/arm/miscregs.hh" 457378Sgblack@eecs.umich.edu#include <fenv.h> 467382Sgblack@eecs.umich.edu#include <cmath> 477375Sgblack@eecs.umich.edu 487384Sgblack@eecs.umich.edunamespace ArmISA 497384Sgblack@eecs.umich.edu{ 507384Sgblack@eecs.umich.edu 517375Sgblack@eecs.umich.eduenum VfpMicroMode { 527375Sgblack@eecs.umich.edu VfpNotAMicroop, 537375Sgblack@eecs.umich.edu VfpMicroop, 547375Sgblack@eecs.umich.edu VfpFirstMicroop, 557375Sgblack@eecs.umich.edu VfpLastMicroop 567375Sgblack@eecs.umich.edu}; 577375Sgblack@eecs.umich.edu 587375Sgblack@eecs.umich.edutemplate<class T> 597375Sgblack@eecs.umich.edustatic inline void 607375Sgblack@eecs.umich.edusetVfpMicroFlags(VfpMicroMode mode, T &flags) 617375Sgblack@eecs.umich.edu{ 627375Sgblack@eecs.umich.edu switch (mode) { 637375Sgblack@eecs.umich.edu case VfpMicroop: 647375Sgblack@eecs.umich.edu flags[StaticInst::IsMicroop] = true; 657375Sgblack@eecs.umich.edu break; 667375Sgblack@eecs.umich.edu case VfpFirstMicroop: 677375Sgblack@eecs.umich.edu flags[StaticInst::IsMicroop] = 687375Sgblack@eecs.umich.edu flags[StaticInst::IsFirstMicroop] = true; 697375Sgblack@eecs.umich.edu break; 707375Sgblack@eecs.umich.edu case VfpLastMicroop: 717375Sgblack@eecs.umich.edu flags[StaticInst::IsMicroop] = 727375Sgblack@eecs.umich.edu flags[StaticInst::IsLastMicroop] = true; 737375Sgblack@eecs.umich.edu break; 747375Sgblack@eecs.umich.edu case VfpNotAMicroop: 757375Sgblack@eecs.umich.edu break; 767375Sgblack@eecs.umich.edu } 777376Sgblack@eecs.umich.edu if (mode == VfpMicroop || mode == VfpFirstMicroop) { 787376Sgblack@eecs.umich.edu flags[StaticInst::IsDelayedCommit] = true; 797376Sgblack@eecs.umich.edu } 807375Sgblack@eecs.umich.edu} 817375Sgblack@eecs.umich.edu 827378Sgblack@eecs.umich.eduenum FeExceptionBit 837378Sgblack@eecs.umich.edu{ 847378Sgblack@eecs.umich.edu FeDivByZero = FE_DIVBYZERO, 857378Sgblack@eecs.umich.edu FeInexact = FE_INEXACT, 867378Sgblack@eecs.umich.edu FeInvalid = FE_INVALID, 877378Sgblack@eecs.umich.edu FeOverflow = FE_OVERFLOW, 887378Sgblack@eecs.umich.edu FeUnderflow = FE_UNDERFLOW, 897378Sgblack@eecs.umich.edu FeAllExceptions = FE_ALL_EXCEPT 907378Sgblack@eecs.umich.edu}; 917378Sgblack@eecs.umich.edu 927378Sgblack@eecs.umich.eduenum FeRoundingMode 937378Sgblack@eecs.umich.edu{ 947378Sgblack@eecs.umich.edu FeRoundDown = FE_DOWNWARD, 957378Sgblack@eecs.umich.edu FeRoundNearest = FE_TONEAREST, 967378Sgblack@eecs.umich.edu FeRoundZero = FE_TOWARDZERO, 977378Sgblack@eecs.umich.edu FeRoundUpward = FE_UPWARD 987378Sgblack@eecs.umich.edu}; 997378Sgblack@eecs.umich.edu 1007378Sgblack@eecs.umich.eduenum VfpRoundingMode 1017378Sgblack@eecs.umich.edu{ 1027378Sgblack@eecs.umich.edu VfpRoundNearest = 0, 1037378Sgblack@eecs.umich.edu VfpRoundUpward = 1, 1047378Sgblack@eecs.umich.edu VfpRoundDown = 2, 1057378Sgblack@eecs.umich.edu VfpRoundZero = 3 1067378Sgblack@eecs.umich.edu}; 1077378Sgblack@eecs.umich.edu 1087382Sgblack@eecs.umich.edutemplate <class fpType> 1097396Sgblack@eecs.umich.edustatic inline bool 1107396Sgblack@eecs.umich.eduflushToZero(fpType &op) 1117396Sgblack@eecs.umich.edu{ 1127396Sgblack@eecs.umich.edu fpType junk = 0.0; 1137396Sgblack@eecs.umich.edu if (std::fpclassify(op) == FP_SUBNORMAL) { 1147396Sgblack@eecs.umich.edu uint64_t bitMask = ULL(0x1) << (sizeof(fpType) * 8 - 1); 1157396Sgblack@eecs.umich.edu op = bitsToFp(fpToBits(op) & bitMask, junk); 1167396Sgblack@eecs.umich.edu return true; 1177396Sgblack@eecs.umich.edu } 1187396Sgblack@eecs.umich.edu return false; 1197396Sgblack@eecs.umich.edu} 1207396Sgblack@eecs.umich.edu 1217396Sgblack@eecs.umich.edutemplate <class fpType> 1227396Sgblack@eecs.umich.edustatic inline bool 1237396Sgblack@eecs.umich.eduflushToZero(fpType &op1, fpType &op2) 1247396Sgblack@eecs.umich.edu{ 1257396Sgblack@eecs.umich.edu bool flush1 = flushToZero(op1); 1267396Sgblack@eecs.umich.edu bool flush2 = flushToZero(op2); 1277396Sgblack@eecs.umich.edu return flush1 || flush2; 1287396Sgblack@eecs.umich.edu} 1297396Sgblack@eecs.umich.edu 1307397Sgblack@eecs.umich.edutemplate <class fpType> 1317397Sgblack@eecs.umich.edustatic inline void 1327397Sgblack@eecs.umich.eduvfpFlushToZero(FPSCR &fpscr, fpType &op) 1337397Sgblack@eecs.umich.edu{ 1347397Sgblack@eecs.umich.edu if (fpscr.fz == 1 && flushToZero(op)) { 1357397Sgblack@eecs.umich.edu fpscr.idc = 1; 1367397Sgblack@eecs.umich.edu } 1377397Sgblack@eecs.umich.edu} 1387397Sgblack@eecs.umich.edu 1397397Sgblack@eecs.umich.edutemplate <class fpType> 1407397Sgblack@eecs.umich.edustatic inline void 1417397Sgblack@eecs.umich.eduvfpFlushToZero(FPSCR &fpscr, fpType &op1, fpType &op2) 1427397Sgblack@eecs.umich.edu{ 1437397Sgblack@eecs.umich.edu vfpFlushToZero(fpscr, op1); 1447397Sgblack@eecs.umich.edu vfpFlushToZero(fpscr, op2); 1457397Sgblack@eecs.umich.edu} 1467397Sgblack@eecs.umich.edu 1477384Sgblack@eecs.umich.edustatic inline uint32_t 1487384Sgblack@eecs.umich.edufpToBits(float fp) 1497384Sgblack@eecs.umich.edu{ 1507384Sgblack@eecs.umich.edu union 1517384Sgblack@eecs.umich.edu { 1527384Sgblack@eecs.umich.edu float fp; 1537384Sgblack@eecs.umich.edu uint32_t bits; 1547384Sgblack@eecs.umich.edu } val; 1557384Sgblack@eecs.umich.edu val.fp = fp; 1567384Sgblack@eecs.umich.edu return val.bits; 1577384Sgblack@eecs.umich.edu} 1587384Sgblack@eecs.umich.edu 1597384Sgblack@eecs.umich.edustatic inline uint64_t 1607384Sgblack@eecs.umich.edufpToBits(double fp) 1617384Sgblack@eecs.umich.edu{ 1627384Sgblack@eecs.umich.edu union 1637384Sgblack@eecs.umich.edu { 1647384Sgblack@eecs.umich.edu double fp; 1657384Sgblack@eecs.umich.edu uint64_t bits; 1667384Sgblack@eecs.umich.edu } val; 1677384Sgblack@eecs.umich.edu val.fp = fp; 1687384Sgblack@eecs.umich.edu return val.bits; 1697384Sgblack@eecs.umich.edu} 1707384Sgblack@eecs.umich.edu 1717384Sgblack@eecs.umich.edustatic inline float 1727384Sgblack@eecs.umich.edubitsToFp(uint64_t bits, float junk) 1737384Sgblack@eecs.umich.edu{ 1747384Sgblack@eecs.umich.edu union 1757384Sgblack@eecs.umich.edu { 1767384Sgblack@eecs.umich.edu float fp; 1777384Sgblack@eecs.umich.edu uint32_t bits; 1787384Sgblack@eecs.umich.edu } val; 1797384Sgblack@eecs.umich.edu val.bits = bits; 1807384Sgblack@eecs.umich.edu return val.fp; 1817384Sgblack@eecs.umich.edu} 1827384Sgblack@eecs.umich.edu 1837384Sgblack@eecs.umich.edustatic inline double 1847384Sgblack@eecs.umich.edubitsToFp(uint64_t bits, double junk) 1857384Sgblack@eecs.umich.edu{ 1867384Sgblack@eecs.umich.edu union 1877384Sgblack@eecs.umich.edu { 1887384Sgblack@eecs.umich.edu double fp; 1897384Sgblack@eecs.umich.edu uint64_t bits; 1907384Sgblack@eecs.umich.edu } val; 1917384Sgblack@eecs.umich.edu val.bits = bits; 1927384Sgblack@eecs.umich.edu return val.fp; 1937384Sgblack@eecs.umich.edu} 1947384Sgblack@eecs.umich.edu 1957396Sgblack@eecs.umich.edutypedef int VfpSavedState; 1967396Sgblack@eecs.umich.edu 1977396Sgblack@eecs.umich.edustatic inline VfpSavedState 1987396Sgblack@eecs.umich.eduprepFpState(uint32_t rMode) 1997396Sgblack@eecs.umich.edu{ 2007396Sgblack@eecs.umich.edu int roundingMode = fegetround(); 2017396Sgblack@eecs.umich.edu feclearexcept(FeAllExceptions); 2027396Sgblack@eecs.umich.edu switch (rMode) { 2037396Sgblack@eecs.umich.edu case VfpRoundNearest: 2047396Sgblack@eecs.umich.edu fesetround(FeRoundNearest); 2057396Sgblack@eecs.umich.edu break; 2067396Sgblack@eecs.umich.edu case VfpRoundUpward: 2077396Sgblack@eecs.umich.edu fesetround(FeRoundUpward); 2087396Sgblack@eecs.umich.edu break; 2097396Sgblack@eecs.umich.edu case VfpRoundDown: 2107396Sgblack@eecs.umich.edu fesetround(FeRoundDown); 2117396Sgblack@eecs.umich.edu break; 2127396Sgblack@eecs.umich.edu case VfpRoundZero: 2137396Sgblack@eecs.umich.edu fesetround(FeRoundZero); 2147396Sgblack@eecs.umich.edu break; 2157396Sgblack@eecs.umich.edu } 2167396Sgblack@eecs.umich.edu return roundingMode; 2177396Sgblack@eecs.umich.edu} 2187396Sgblack@eecs.umich.edu 2197396Sgblack@eecs.umich.edustatic inline void 2207396Sgblack@eecs.umich.edufinishVfp(FPSCR &fpscr, VfpSavedState state) 2217396Sgblack@eecs.umich.edu{ 2227396Sgblack@eecs.umich.edu int exceptions = fetestexcept(FeAllExceptions); 2237396Sgblack@eecs.umich.edu bool underflow = false; 2247396Sgblack@eecs.umich.edu if (exceptions & FeInvalid) { 2257396Sgblack@eecs.umich.edu fpscr.ioc = 1; 2267396Sgblack@eecs.umich.edu } 2277396Sgblack@eecs.umich.edu if (exceptions & FeDivByZero) { 2287396Sgblack@eecs.umich.edu fpscr.dzc = 1; 2297396Sgblack@eecs.umich.edu } 2307396Sgblack@eecs.umich.edu if (exceptions & FeOverflow) { 2317396Sgblack@eecs.umich.edu fpscr.ofc = 1; 2327396Sgblack@eecs.umich.edu } 2337396Sgblack@eecs.umich.edu if (exceptions & FeUnderflow) { 2347396Sgblack@eecs.umich.edu underflow = true; 2357396Sgblack@eecs.umich.edu fpscr.ufc = 1; 2367396Sgblack@eecs.umich.edu } 2377396Sgblack@eecs.umich.edu if ((exceptions & FeInexact) && !(underflow && fpscr.fz)) { 2387396Sgblack@eecs.umich.edu fpscr.ixc = 1; 2397396Sgblack@eecs.umich.edu } 2407396Sgblack@eecs.umich.edu fesetround(state); 2417396Sgblack@eecs.umich.edu} 2427396Sgblack@eecs.umich.edu 2437384Sgblack@eecs.umich.edutemplate <class fpType> 2447384Sgblack@eecs.umich.edustatic inline fpType 2457386Sgblack@eecs.umich.edufixDest(FPSCR fpscr, fpType val, fpType op1) 2467386Sgblack@eecs.umich.edu{ 2477386Sgblack@eecs.umich.edu int fpClass = std::fpclassify(val); 2487386Sgblack@eecs.umich.edu fpType junk = 0.0; 2497386Sgblack@eecs.umich.edu if (fpClass == FP_NAN) { 2507386Sgblack@eecs.umich.edu const bool single = (sizeof(val) == sizeof(float)); 2517386Sgblack@eecs.umich.edu const uint64_t qnan = single ? 0x7fc00000 : ULL(0x7ff8000000000000); 2527386Sgblack@eecs.umich.edu const bool nan = std::isnan(op1); 2537386Sgblack@eecs.umich.edu if (!nan || (fpscr.dn == 1)) { 2547386Sgblack@eecs.umich.edu val = bitsToFp(qnan, junk); 2557386Sgblack@eecs.umich.edu } else if (nan) { 2567386Sgblack@eecs.umich.edu val = bitsToFp(fpToBits(op1) | qnan, junk); 2577386Sgblack@eecs.umich.edu } 2587386Sgblack@eecs.umich.edu } else if (fpClass == FP_SUBNORMAL && fpscr.fz == 1) { 2597386Sgblack@eecs.umich.edu // Turn val into a zero with the correct sign; 2607386Sgblack@eecs.umich.edu uint64_t bitMask = ULL(0x1) << (sizeof(fpType) * 8 - 1); 2617386Sgblack@eecs.umich.edu val = bitsToFp(fpToBits(val) & bitMask, junk); 2627396Sgblack@eecs.umich.edu feclearexcept(FeInexact); 2637386Sgblack@eecs.umich.edu feraiseexcept(FeUnderflow); 2647386Sgblack@eecs.umich.edu } 2657386Sgblack@eecs.umich.edu return val; 2667386Sgblack@eecs.umich.edu} 2677386Sgblack@eecs.umich.edu 2687386Sgblack@eecs.umich.edutemplate <class fpType> 2697386Sgblack@eecs.umich.edustatic inline fpType 2707385Sgblack@eecs.umich.edufixDest(FPSCR fpscr, fpType val, fpType op1, fpType op2) 2717384Sgblack@eecs.umich.edu{ 2727385Sgblack@eecs.umich.edu int fpClass = std::fpclassify(val); 2737385Sgblack@eecs.umich.edu fpType junk = 0.0; 2747385Sgblack@eecs.umich.edu if (fpClass == FP_NAN) { 2757384Sgblack@eecs.umich.edu const bool single = (sizeof(val) == sizeof(float)); 2767384Sgblack@eecs.umich.edu const uint64_t qnan = single ? 0x7fc00000 : ULL(0x7ff8000000000000); 2777384Sgblack@eecs.umich.edu const bool nan1 = std::isnan(op1); 2787384Sgblack@eecs.umich.edu const bool nan2 = std::isnan(op2); 2797384Sgblack@eecs.umich.edu const bool signal1 = nan1 && ((fpToBits(op1) & qnan) != qnan); 2807384Sgblack@eecs.umich.edu const bool signal2 = nan2 && ((fpToBits(op2) & qnan) != qnan); 2817384Sgblack@eecs.umich.edu if ((!nan1 && !nan2) || (fpscr.dn == 1)) { 2827384Sgblack@eecs.umich.edu val = bitsToFp(qnan, junk); 2837384Sgblack@eecs.umich.edu } else if (signal1) { 2847384Sgblack@eecs.umich.edu val = bitsToFp(fpToBits(op1) | qnan, junk); 2857384Sgblack@eecs.umich.edu } else if (signal2) { 2867384Sgblack@eecs.umich.edu val = bitsToFp(fpToBits(op2) | qnan, junk); 2877384Sgblack@eecs.umich.edu } else if (nan1) { 2887384Sgblack@eecs.umich.edu val = op1; 2897384Sgblack@eecs.umich.edu } else if (nan2) { 2907384Sgblack@eecs.umich.edu val = op2; 2917384Sgblack@eecs.umich.edu } 2927385Sgblack@eecs.umich.edu } else if (fpClass == FP_SUBNORMAL && fpscr.fz == 1) { 2937385Sgblack@eecs.umich.edu // Turn val into a zero with the correct sign; 2947385Sgblack@eecs.umich.edu uint64_t bitMask = ULL(0x1) << (sizeof(fpType) * 8 - 1); 2957385Sgblack@eecs.umich.edu val = bitsToFp(fpToBits(val) & bitMask, junk); 2967396Sgblack@eecs.umich.edu feclearexcept(FeInexact); 2977385Sgblack@eecs.umich.edu feraiseexcept(FeUnderflow); 2987384Sgblack@eecs.umich.edu } 2997384Sgblack@eecs.umich.edu return val; 3007384Sgblack@eecs.umich.edu} 3017384Sgblack@eecs.umich.edu 3027386Sgblack@eecs.umich.edutemplate <class fpType> 3037386Sgblack@eecs.umich.edustatic inline fpType 3047386Sgblack@eecs.umich.edufixDivDest(FPSCR fpscr, fpType val, fpType op1, fpType op2) 3057386Sgblack@eecs.umich.edu{ 3067386Sgblack@eecs.umich.edu fpType mid = fixDest(fpscr, val, op1, op2); 3077386Sgblack@eecs.umich.edu const bool single = (sizeof(fpType) == sizeof(float)); 3087386Sgblack@eecs.umich.edu const fpType junk = 0.0; 3097386Sgblack@eecs.umich.edu if ((single && (val == bitsToFp(0x00800000, junk) || 3107386Sgblack@eecs.umich.edu val == bitsToFp(0x80800000, junk))) || 3117386Sgblack@eecs.umich.edu (!single && (val == bitsToFp(ULL(0x0010000000000000), junk) || 3127386Sgblack@eecs.umich.edu val == bitsToFp(ULL(0x8010000000000000), junk))) 3137386Sgblack@eecs.umich.edu ) { 3147386Sgblack@eecs.umich.edu __asm__ __volatile__("" : "=m" (op1) : "m" (op1)); 3157386Sgblack@eecs.umich.edu fesetround(FeRoundZero); 3167386Sgblack@eecs.umich.edu fpType temp = 0.0; 3177386Sgblack@eecs.umich.edu __asm__ __volatile__("" : "=m" (temp) : "m" (temp)); 3187386Sgblack@eecs.umich.edu temp = op1 / op2; 3197396Sgblack@eecs.umich.edu if (flushToZero(temp)) { 3207386Sgblack@eecs.umich.edu feraiseexcept(FeUnderflow); 3217396Sgblack@eecs.umich.edu if (fpscr.fz) { 3227396Sgblack@eecs.umich.edu feclearexcept(FeInexact); 3237396Sgblack@eecs.umich.edu mid = temp; 3247396Sgblack@eecs.umich.edu } 3257386Sgblack@eecs.umich.edu } 3267386Sgblack@eecs.umich.edu __asm__ __volatile__("" :: "m" (temp)); 3277386Sgblack@eecs.umich.edu } 3287386Sgblack@eecs.umich.edu return mid; 3297386Sgblack@eecs.umich.edu} 3307386Sgblack@eecs.umich.edu 3317386Sgblack@eecs.umich.edustatic inline float 3327386Sgblack@eecs.umich.edufixFpDFpSDest(FPSCR fpscr, double val) 3337386Sgblack@eecs.umich.edu{ 3347386Sgblack@eecs.umich.edu const float junk = 0.0; 3357386Sgblack@eecs.umich.edu float op1 = 0.0; 3367386Sgblack@eecs.umich.edu if (std::isnan(val)) { 3377386Sgblack@eecs.umich.edu uint64_t valBits = fpToBits(val); 3387386Sgblack@eecs.umich.edu uint32_t op1Bits = bits(valBits, 50, 29) | 3397386Sgblack@eecs.umich.edu (mask(9) << 22) | 3407386Sgblack@eecs.umich.edu (bits(valBits, 63) << 31); 3417386Sgblack@eecs.umich.edu op1 = bitsToFp(op1Bits, junk); 3427386Sgblack@eecs.umich.edu } 3437386Sgblack@eecs.umich.edu float mid = fixDest(fpscr, (float)val, op1); 3447396Sgblack@eecs.umich.edu if (fpscr.fz && fetestexcept(FeUnderflow | FeInexact) == 3457396Sgblack@eecs.umich.edu (FeUnderflow | FeInexact)) { 3467396Sgblack@eecs.umich.edu feclearexcept(FeInexact); 3477396Sgblack@eecs.umich.edu } 3487386Sgblack@eecs.umich.edu if (mid == bitsToFp(0x00800000, junk) || 3497386Sgblack@eecs.umich.edu mid == bitsToFp(0x80800000, junk)) { 3507386Sgblack@eecs.umich.edu __asm__ __volatile__("" : "=m" (val) : "m" (val)); 3517386Sgblack@eecs.umich.edu fesetround(FeRoundZero); 3527386Sgblack@eecs.umich.edu float temp = 0.0; 3537386Sgblack@eecs.umich.edu __asm__ __volatile__("" : "=m" (temp) : "m" (temp)); 3547386Sgblack@eecs.umich.edu temp = val; 3557396Sgblack@eecs.umich.edu if (flushToZero(temp)) { 3567386Sgblack@eecs.umich.edu feraiseexcept(FeUnderflow); 3577396Sgblack@eecs.umich.edu if (fpscr.fz) { 3587396Sgblack@eecs.umich.edu feclearexcept(FeInexact); 3597396Sgblack@eecs.umich.edu mid = temp; 3607396Sgblack@eecs.umich.edu } 3617386Sgblack@eecs.umich.edu } 3627386Sgblack@eecs.umich.edu __asm__ __volatile__("" :: "m" (temp)); 3637386Sgblack@eecs.umich.edu } 3647386Sgblack@eecs.umich.edu return mid; 3657386Sgblack@eecs.umich.edu} 3667386Sgblack@eecs.umich.edu 3677396Sgblack@eecs.umich.edustatic inline double 3687396Sgblack@eecs.umich.edufixFpSFpDDest(FPSCR fpscr, float val) 3697396Sgblack@eecs.umich.edu{ 3707396Sgblack@eecs.umich.edu const double junk = 0.0; 3717396Sgblack@eecs.umich.edu double op1 = 0.0; 3727396Sgblack@eecs.umich.edu if (std::isnan(val)) { 3737396Sgblack@eecs.umich.edu uint32_t valBits = fpToBits(val); 3747396Sgblack@eecs.umich.edu uint64_t op1Bits = ((uint64_t)bits(valBits, 21, 0) << 29) | 3757396Sgblack@eecs.umich.edu (mask(12) << 51) | 3767396Sgblack@eecs.umich.edu ((uint64_t)bits(valBits, 31) << 63); 3777396Sgblack@eecs.umich.edu op1 = bitsToFp(op1Bits, junk); 3787396Sgblack@eecs.umich.edu } 3797396Sgblack@eecs.umich.edu double mid = fixDest(fpscr, (double)val, op1); 3807396Sgblack@eecs.umich.edu if (mid == bitsToFp(ULL(0x0010000000000000), junk) || 3817396Sgblack@eecs.umich.edu mid == bitsToFp(ULL(0x8010000000000000), junk)) { 3827396Sgblack@eecs.umich.edu __asm__ __volatile__("" : "=m" (val) : "m" (val)); 3837396Sgblack@eecs.umich.edu fesetround(FeRoundZero); 3847396Sgblack@eecs.umich.edu double temp = 0.0; 3857396Sgblack@eecs.umich.edu __asm__ __volatile__("" : "=m" (temp) : "m" (temp)); 3867396Sgblack@eecs.umich.edu temp = val; 3877396Sgblack@eecs.umich.edu if (flushToZero(temp)) { 3887396Sgblack@eecs.umich.edu feraiseexcept(FeUnderflow); 3897396Sgblack@eecs.umich.edu if (fpscr.fz) { 3907396Sgblack@eecs.umich.edu feclearexcept(FeInexact); 3917396Sgblack@eecs.umich.edu mid = temp; 3927396Sgblack@eecs.umich.edu } 3937396Sgblack@eecs.umich.edu } 3947396Sgblack@eecs.umich.edu __asm__ __volatile__("" :: "m" (temp)); 3957396Sgblack@eecs.umich.edu } 3967396Sgblack@eecs.umich.edu return mid; 3977396Sgblack@eecs.umich.edu} 3987396Sgblack@eecs.umich.edu 3997396Sgblack@eecs.umich.edustatic inline double 4007396Sgblack@eecs.umich.edumakeDouble(uint32_t low, uint32_t high) 4017396Sgblack@eecs.umich.edu{ 4027396Sgblack@eecs.umich.edu double junk = 0.0; 4037396Sgblack@eecs.umich.edu return bitsToFp((uint64_t)low | ((uint64_t)high << 32), junk); 4047396Sgblack@eecs.umich.edu} 4057396Sgblack@eecs.umich.edu 4067396Sgblack@eecs.umich.edustatic inline uint32_t 4077396Sgblack@eecs.umich.edulowFromDouble(double val) 4087396Sgblack@eecs.umich.edu{ 4097396Sgblack@eecs.umich.edu return fpToBits(val); 4107396Sgblack@eecs.umich.edu} 4117396Sgblack@eecs.umich.edu 4127396Sgblack@eecs.umich.edustatic inline uint32_t 4137396Sgblack@eecs.umich.eduhighFromDouble(double val) 4147396Sgblack@eecs.umich.edu{ 4157396Sgblack@eecs.umich.edu return fpToBits(val) >> 32; 4167396Sgblack@eecs.umich.edu} 4177396Sgblack@eecs.umich.edu 4187379Sgblack@eecs.umich.edustatic inline uint64_t 4197388Sgblack@eecs.umich.eduvfpFpSToFixed(float val, bool isSigned, bool half, 4207388Sgblack@eecs.umich.edu uint8_t imm, bool rzero = true) 4217379Sgblack@eecs.umich.edu{ 4227396Sgblack@eecs.umich.edu int rmode = rzero ? FeRoundZero : fegetround(); 4237396Sgblack@eecs.umich.edu __asm__ __volatile__("" : "=m" (rmode) : "m" (rmode)); 4247388Sgblack@eecs.umich.edu fesetround(FeRoundNearest); 4257379Sgblack@eecs.umich.edu val = val * powf(2.0, imm); 4267379Sgblack@eecs.umich.edu __asm__ __volatile__("" : "=m" (val) : "m" (val)); 4277396Sgblack@eecs.umich.edu fesetround(rmode); 4287379Sgblack@eecs.umich.edu feclearexcept(FeAllExceptions); 4297382Sgblack@eecs.umich.edu __asm__ __volatile__("" : "=m" (val) : "m" (val)); 4307382Sgblack@eecs.umich.edu float origVal = val; 4317382Sgblack@eecs.umich.edu val = rintf(val); 4327382Sgblack@eecs.umich.edu int fpType = std::fpclassify(val); 4337382Sgblack@eecs.umich.edu if (fpType == FP_SUBNORMAL || fpType == FP_NAN) { 4347382Sgblack@eecs.umich.edu if (fpType == FP_NAN) { 4357382Sgblack@eecs.umich.edu feraiseexcept(FeInvalid); 4367382Sgblack@eecs.umich.edu } 4377382Sgblack@eecs.umich.edu val = 0.0; 4387382Sgblack@eecs.umich.edu } else if (origVal != val) { 4397396Sgblack@eecs.umich.edu switch (rmode) { 4407396Sgblack@eecs.umich.edu case FeRoundNearest: 4417396Sgblack@eecs.umich.edu if (origVal - val > 0.5) 4427396Sgblack@eecs.umich.edu val += 1.0; 4437396Sgblack@eecs.umich.edu else if (val - origVal > 0.5) 4447396Sgblack@eecs.umich.edu val -= 1.0; 4457396Sgblack@eecs.umich.edu break; 4467396Sgblack@eecs.umich.edu case FeRoundDown: 4477396Sgblack@eecs.umich.edu if (origVal < val) 4487396Sgblack@eecs.umich.edu val -= 1.0; 4497396Sgblack@eecs.umich.edu break; 4507396Sgblack@eecs.umich.edu case FeRoundUpward: 4517396Sgblack@eecs.umich.edu if (origVal > val) 4527396Sgblack@eecs.umich.edu val += 1.0; 4537396Sgblack@eecs.umich.edu break; 4547396Sgblack@eecs.umich.edu } 4557382Sgblack@eecs.umich.edu feraiseexcept(FeInexact); 4567382Sgblack@eecs.umich.edu } 4577382Sgblack@eecs.umich.edu 4587379Sgblack@eecs.umich.edu if (isSigned) { 4597379Sgblack@eecs.umich.edu if (half) { 4607381Sgblack@eecs.umich.edu if ((double)val < (int16_t)(1 << 15)) { 4617379Sgblack@eecs.umich.edu feraiseexcept(FeInvalid); 4627382Sgblack@eecs.umich.edu feclearexcept(FeInexact); 4637379Sgblack@eecs.umich.edu return (int16_t)(1 << 15); 4647379Sgblack@eecs.umich.edu } 4657381Sgblack@eecs.umich.edu if ((double)val > (int16_t)mask(15)) { 4667379Sgblack@eecs.umich.edu feraiseexcept(FeInvalid); 4677382Sgblack@eecs.umich.edu feclearexcept(FeInexact); 4687379Sgblack@eecs.umich.edu return (int16_t)mask(15); 4697379Sgblack@eecs.umich.edu } 4707379Sgblack@eecs.umich.edu return (int16_t)val; 4717379Sgblack@eecs.umich.edu } else { 4727381Sgblack@eecs.umich.edu if ((double)val < (int32_t)(1 << 31)) { 4737379Sgblack@eecs.umich.edu feraiseexcept(FeInvalid); 4747382Sgblack@eecs.umich.edu feclearexcept(FeInexact); 4757379Sgblack@eecs.umich.edu return (int32_t)(1 << 31); 4767379Sgblack@eecs.umich.edu } 4777381Sgblack@eecs.umich.edu if ((double)val > (int32_t)mask(31)) { 4787379Sgblack@eecs.umich.edu feraiseexcept(FeInvalid); 4797382Sgblack@eecs.umich.edu feclearexcept(FeInexact); 4807379Sgblack@eecs.umich.edu return (int32_t)mask(31); 4817379Sgblack@eecs.umich.edu } 4827379Sgblack@eecs.umich.edu return (int32_t)val; 4837379Sgblack@eecs.umich.edu } 4847379Sgblack@eecs.umich.edu } else { 4857379Sgblack@eecs.umich.edu if (half) { 4867381Sgblack@eecs.umich.edu if ((double)val < 0) { 4877379Sgblack@eecs.umich.edu feraiseexcept(FeInvalid); 4887382Sgblack@eecs.umich.edu feclearexcept(FeInexact); 4897379Sgblack@eecs.umich.edu return 0; 4907379Sgblack@eecs.umich.edu } 4917381Sgblack@eecs.umich.edu if ((double)val > (mask(16))) { 4927379Sgblack@eecs.umich.edu feraiseexcept(FeInvalid); 4937382Sgblack@eecs.umich.edu feclearexcept(FeInexact); 4947379Sgblack@eecs.umich.edu return mask(16); 4957379Sgblack@eecs.umich.edu } 4967379Sgblack@eecs.umich.edu return (uint16_t)val; 4977379Sgblack@eecs.umich.edu } else { 4987381Sgblack@eecs.umich.edu if ((double)val < 0) { 4997379Sgblack@eecs.umich.edu feraiseexcept(FeInvalid); 5007382Sgblack@eecs.umich.edu feclearexcept(FeInexact); 5017379Sgblack@eecs.umich.edu return 0; 5027379Sgblack@eecs.umich.edu } 5037381Sgblack@eecs.umich.edu if ((double)val > (mask(32))) { 5047379Sgblack@eecs.umich.edu feraiseexcept(FeInvalid); 5057382Sgblack@eecs.umich.edu feclearexcept(FeInexact); 5067379Sgblack@eecs.umich.edu return mask(32); 5077379Sgblack@eecs.umich.edu } 5087379Sgblack@eecs.umich.edu return (uint32_t)val; 5097379Sgblack@eecs.umich.edu } 5107379Sgblack@eecs.umich.edu } 5117379Sgblack@eecs.umich.edu} 5127379Sgblack@eecs.umich.edu 5137379Sgblack@eecs.umich.edustatic inline float 5147386Sgblack@eecs.umich.eduvfpUFixedToFpS(FPSCR fpscr, uint32_t val, bool half, uint8_t imm) 5157379Sgblack@eecs.umich.edu{ 5167379Sgblack@eecs.umich.edu fesetround(FeRoundNearest); 5177379Sgblack@eecs.umich.edu if (half) 5187379Sgblack@eecs.umich.edu val = (uint16_t)val; 5197382Sgblack@eecs.umich.edu float scale = powf(2.0, imm); 5207382Sgblack@eecs.umich.edu __asm__ __volatile__("" : "=m" (scale) : "m" (scale)); 5217382Sgblack@eecs.umich.edu feclearexcept(FeAllExceptions); 5227382Sgblack@eecs.umich.edu __asm__ __volatile__("" : "=m" (scale) : "m" (scale)); 5237386Sgblack@eecs.umich.edu return fixDivDest(fpscr, val / scale, (float)val, scale); 5247379Sgblack@eecs.umich.edu} 5257379Sgblack@eecs.umich.edu 5267379Sgblack@eecs.umich.edustatic inline float 5277386Sgblack@eecs.umich.eduvfpSFixedToFpS(FPSCR fpscr, int32_t val, bool half, uint8_t imm) 5287379Sgblack@eecs.umich.edu{ 5297379Sgblack@eecs.umich.edu fesetround(FeRoundNearest); 5307379Sgblack@eecs.umich.edu if (half) 5317379Sgblack@eecs.umich.edu val = sext<16>(val & mask(16)); 5327382Sgblack@eecs.umich.edu float scale = powf(2.0, imm); 5337382Sgblack@eecs.umich.edu __asm__ __volatile__("" : "=m" (scale) : "m" (scale)); 5347382Sgblack@eecs.umich.edu feclearexcept(FeAllExceptions); 5357382Sgblack@eecs.umich.edu __asm__ __volatile__("" : "=m" (scale) : "m" (scale)); 5367386Sgblack@eecs.umich.edu return fixDivDest(fpscr, val / scale, (float)val, scale); 5377379Sgblack@eecs.umich.edu} 5387379Sgblack@eecs.umich.edu 5397379Sgblack@eecs.umich.edustatic inline uint64_t 5407388Sgblack@eecs.umich.eduvfpFpDToFixed(double val, bool isSigned, bool half, 5417388Sgblack@eecs.umich.edu uint8_t imm, bool rzero = true) 5427379Sgblack@eecs.umich.edu{ 5437396Sgblack@eecs.umich.edu int rmode = rzero ? FeRoundZero : fegetround(); 5447382Sgblack@eecs.umich.edu fesetround(FeRoundNearest); 5457379Sgblack@eecs.umich.edu val = val * pow(2.0, imm); 5467379Sgblack@eecs.umich.edu __asm__ __volatile__("" : "=m" (val) : "m" (val)); 5477396Sgblack@eecs.umich.edu fesetround(rmode); 5487379Sgblack@eecs.umich.edu feclearexcept(FeAllExceptions); 5497382Sgblack@eecs.umich.edu __asm__ __volatile__("" : "=m" (val) : "m" (val)); 5507382Sgblack@eecs.umich.edu double origVal = val; 5517382Sgblack@eecs.umich.edu val = rint(val); 5527382Sgblack@eecs.umich.edu int fpType = std::fpclassify(val); 5537382Sgblack@eecs.umich.edu if (fpType == FP_SUBNORMAL || fpType == FP_NAN) { 5547382Sgblack@eecs.umich.edu if (fpType == FP_NAN) { 5557382Sgblack@eecs.umich.edu feraiseexcept(FeInvalid); 5567382Sgblack@eecs.umich.edu } 5577382Sgblack@eecs.umich.edu val = 0.0; 5587382Sgblack@eecs.umich.edu } else if (origVal != val) { 5597396Sgblack@eecs.umich.edu switch (rmode) { 5607396Sgblack@eecs.umich.edu case FeRoundNearest: 5617396Sgblack@eecs.umich.edu if (origVal - val > 0.5) 5627396Sgblack@eecs.umich.edu val += 1.0; 5637396Sgblack@eecs.umich.edu else if (val - origVal > 0.5) 5647396Sgblack@eecs.umich.edu val -= 1.0; 5657396Sgblack@eecs.umich.edu break; 5667396Sgblack@eecs.umich.edu case FeRoundDown: 5677396Sgblack@eecs.umich.edu if (origVal < val) 5687396Sgblack@eecs.umich.edu val -= 1.0; 5697396Sgblack@eecs.umich.edu break; 5707396Sgblack@eecs.umich.edu case FeRoundUpward: 5717396Sgblack@eecs.umich.edu if (origVal > val) 5727396Sgblack@eecs.umich.edu val += 1.0; 5737396Sgblack@eecs.umich.edu break; 5747396Sgblack@eecs.umich.edu } 5757382Sgblack@eecs.umich.edu feraiseexcept(FeInexact); 5767382Sgblack@eecs.umich.edu } 5777379Sgblack@eecs.umich.edu if (isSigned) { 5787379Sgblack@eecs.umich.edu if (half) { 5797379Sgblack@eecs.umich.edu if (val < (int16_t)(1 << 15)) { 5807379Sgblack@eecs.umich.edu feraiseexcept(FeInvalid); 5817382Sgblack@eecs.umich.edu feclearexcept(FeInexact); 5827379Sgblack@eecs.umich.edu return (int16_t)(1 << 15); 5837379Sgblack@eecs.umich.edu } 5847379Sgblack@eecs.umich.edu if (val > (int16_t)mask(15)) { 5857379Sgblack@eecs.umich.edu feraiseexcept(FeInvalid); 5867382Sgblack@eecs.umich.edu feclearexcept(FeInexact); 5877379Sgblack@eecs.umich.edu return (int16_t)mask(15); 5887379Sgblack@eecs.umich.edu } 5897379Sgblack@eecs.umich.edu return (int16_t)val; 5907379Sgblack@eecs.umich.edu } else { 5917379Sgblack@eecs.umich.edu if (val < (int32_t)(1 << 31)) { 5927379Sgblack@eecs.umich.edu feraiseexcept(FeInvalid); 5937382Sgblack@eecs.umich.edu feclearexcept(FeInexact); 5947379Sgblack@eecs.umich.edu return (int32_t)(1 << 31); 5957379Sgblack@eecs.umich.edu } 5967379Sgblack@eecs.umich.edu if (val > (int32_t)mask(31)) { 5977379Sgblack@eecs.umich.edu feraiseexcept(FeInvalid); 5987382Sgblack@eecs.umich.edu feclearexcept(FeInexact); 5997379Sgblack@eecs.umich.edu return (int32_t)mask(31); 6007379Sgblack@eecs.umich.edu } 6017379Sgblack@eecs.umich.edu return (int32_t)val; 6027379Sgblack@eecs.umich.edu } 6037379Sgblack@eecs.umich.edu } else { 6047379Sgblack@eecs.umich.edu if (half) { 6057379Sgblack@eecs.umich.edu if (val < 0) { 6067379Sgblack@eecs.umich.edu feraiseexcept(FeInvalid); 6077382Sgblack@eecs.umich.edu feclearexcept(FeInexact); 6087379Sgblack@eecs.umich.edu return 0; 6097379Sgblack@eecs.umich.edu } 6107379Sgblack@eecs.umich.edu if (val > mask(16)) { 6117379Sgblack@eecs.umich.edu feraiseexcept(FeInvalid); 6127382Sgblack@eecs.umich.edu feclearexcept(FeInexact); 6137379Sgblack@eecs.umich.edu return mask(16); 6147379Sgblack@eecs.umich.edu } 6157379Sgblack@eecs.umich.edu return (uint16_t)val; 6167379Sgblack@eecs.umich.edu } else { 6177379Sgblack@eecs.umich.edu if (val < 0) { 6187379Sgblack@eecs.umich.edu feraiseexcept(FeInvalid); 6197382Sgblack@eecs.umich.edu feclearexcept(FeInexact); 6207379Sgblack@eecs.umich.edu return 0; 6217379Sgblack@eecs.umich.edu } 6227379Sgblack@eecs.umich.edu if (val > mask(32)) { 6237379Sgblack@eecs.umich.edu feraiseexcept(FeInvalid); 6247382Sgblack@eecs.umich.edu feclearexcept(FeInexact); 6257379Sgblack@eecs.umich.edu return mask(32); 6267379Sgblack@eecs.umich.edu } 6277379Sgblack@eecs.umich.edu return (uint32_t)val; 6287379Sgblack@eecs.umich.edu } 6297379Sgblack@eecs.umich.edu } 6307379Sgblack@eecs.umich.edu} 6317379Sgblack@eecs.umich.edu 6327379Sgblack@eecs.umich.edustatic inline double 6337386Sgblack@eecs.umich.eduvfpUFixedToFpD(FPSCR fpscr, uint32_t val, bool half, uint8_t imm) 6347379Sgblack@eecs.umich.edu{ 6357379Sgblack@eecs.umich.edu fesetround(FeRoundNearest); 6367379Sgblack@eecs.umich.edu if (half) 6377379Sgblack@eecs.umich.edu val = (uint16_t)val; 6387382Sgblack@eecs.umich.edu double scale = pow(2.0, imm); 6397382Sgblack@eecs.umich.edu __asm__ __volatile__("" : "=m" (scale) : "m" (scale)); 6407382Sgblack@eecs.umich.edu feclearexcept(FeAllExceptions); 6417382Sgblack@eecs.umich.edu __asm__ __volatile__("" : "=m" (scale) : "m" (scale)); 6427386Sgblack@eecs.umich.edu return fixDivDest(fpscr, val / scale, (double)val, scale); 6437379Sgblack@eecs.umich.edu} 6447379Sgblack@eecs.umich.edu 6457379Sgblack@eecs.umich.edustatic inline double 6467386Sgblack@eecs.umich.eduvfpSFixedToFpD(FPSCR fpscr, int32_t val, bool half, uint8_t imm) 6477379Sgblack@eecs.umich.edu{ 6487379Sgblack@eecs.umich.edu fesetround(FeRoundNearest); 6497379Sgblack@eecs.umich.edu if (half) 6507379Sgblack@eecs.umich.edu val = sext<16>(val & mask(16)); 6517382Sgblack@eecs.umich.edu double scale = pow(2.0, imm); 6527382Sgblack@eecs.umich.edu __asm__ __volatile__("" : "=m" (scale) : "m" (scale)); 6537382Sgblack@eecs.umich.edu feclearexcept(FeAllExceptions); 6547382Sgblack@eecs.umich.edu __asm__ __volatile__("" : "=m" (scale) : "m" (scale)); 6557386Sgblack@eecs.umich.edu return fixDivDest(fpscr, val / scale, (double)val, scale); 6567379Sgblack@eecs.umich.edu} 6577379Sgblack@eecs.umich.edu 6587376Sgblack@eecs.umich.educlass VfpMacroOp : public PredMacroOp 6597376Sgblack@eecs.umich.edu{ 6607376Sgblack@eecs.umich.edu public: 6617376Sgblack@eecs.umich.edu static bool 6627376Sgblack@eecs.umich.edu inScalarBank(IntRegIndex idx) 6637376Sgblack@eecs.umich.edu { 6647376Sgblack@eecs.umich.edu return (idx % 32) < 8; 6657376Sgblack@eecs.umich.edu } 6667376Sgblack@eecs.umich.edu 6677376Sgblack@eecs.umich.edu protected: 6687376Sgblack@eecs.umich.edu bool wide; 6697376Sgblack@eecs.umich.edu 6707376Sgblack@eecs.umich.edu VfpMacroOp(const char *mnem, ExtMachInst _machInst, 6717376Sgblack@eecs.umich.edu OpClass __opClass, bool _wide) : 6727376Sgblack@eecs.umich.edu PredMacroOp(mnem, _machInst, __opClass), wide(_wide) 6737376Sgblack@eecs.umich.edu {} 6747376Sgblack@eecs.umich.edu 6757376Sgblack@eecs.umich.edu IntRegIndex 6767376Sgblack@eecs.umich.edu addStride(IntRegIndex idx, unsigned stride) 6777376Sgblack@eecs.umich.edu { 6787376Sgblack@eecs.umich.edu if (wide) { 6797376Sgblack@eecs.umich.edu stride *= 2; 6807376Sgblack@eecs.umich.edu } 6817376Sgblack@eecs.umich.edu unsigned offset = idx % 8; 6827376Sgblack@eecs.umich.edu idx = (IntRegIndex)(idx - offset); 6837376Sgblack@eecs.umich.edu offset += stride; 6847376Sgblack@eecs.umich.edu idx = (IntRegIndex)(idx + (offset % 8)); 6857376Sgblack@eecs.umich.edu return idx; 6867376Sgblack@eecs.umich.edu } 6877376Sgblack@eecs.umich.edu 6887376Sgblack@eecs.umich.edu void 6897376Sgblack@eecs.umich.edu nextIdxs(IntRegIndex &dest, IntRegIndex &op1, IntRegIndex &op2) 6907376Sgblack@eecs.umich.edu { 6917376Sgblack@eecs.umich.edu unsigned stride = (machInst.fpscrStride == 0) ? 1 : 2; 6927376Sgblack@eecs.umich.edu assert(!inScalarBank(dest)); 6937376Sgblack@eecs.umich.edu dest = addStride(dest, stride); 6947376Sgblack@eecs.umich.edu op1 = addStride(op1, stride); 6957376Sgblack@eecs.umich.edu if (!inScalarBank(op2)) { 6967376Sgblack@eecs.umich.edu op2 = addStride(op2, stride); 6977376Sgblack@eecs.umich.edu } 6987376Sgblack@eecs.umich.edu } 6997376Sgblack@eecs.umich.edu 7007376Sgblack@eecs.umich.edu void 7017376Sgblack@eecs.umich.edu nextIdxs(IntRegIndex &dest, IntRegIndex &op1) 7027376Sgblack@eecs.umich.edu { 7037376Sgblack@eecs.umich.edu unsigned stride = (machInst.fpscrStride == 0) ? 1 : 2; 7047376Sgblack@eecs.umich.edu assert(!inScalarBank(dest)); 7057376Sgblack@eecs.umich.edu dest = addStride(dest, stride); 7067376Sgblack@eecs.umich.edu if (!inScalarBank(op1)) { 7077376Sgblack@eecs.umich.edu op1 = addStride(op1, stride); 7087376Sgblack@eecs.umich.edu } 7097376Sgblack@eecs.umich.edu } 7107376Sgblack@eecs.umich.edu 7117376Sgblack@eecs.umich.edu void 7127376Sgblack@eecs.umich.edu nextIdxs(IntRegIndex &dest) 7137376Sgblack@eecs.umich.edu { 7147376Sgblack@eecs.umich.edu unsigned stride = (machInst.fpscrStride == 0) ? 1 : 2; 7157376Sgblack@eecs.umich.edu assert(!inScalarBank(dest)); 7167376Sgblack@eecs.umich.edu dest = addStride(dest, stride); 7177376Sgblack@eecs.umich.edu } 7187376Sgblack@eecs.umich.edu}; 7197376Sgblack@eecs.umich.edu 7207396Sgblack@eecs.umich.edustatic inline float 7217396Sgblack@eecs.umich.edufpAddS(float a, float b) 7227396Sgblack@eecs.umich.edu{ 7237396Sgblack@eecs.umich.edu return a + b; 7247396Sgblack@eecs.umich.edu} 7257396Sgblack@eecs.umich.edu 7267396Sgblack@eecs.umich.edustatic inline double 7277396Sgblack@eecs.umich.edufpAddD(double a, double b) 7287396Sgblack@eecs.umich.edu{ 7297396Sgblack@eecs.umich.edu return a + b; 7307396Sgblack@eecs.umich.edu} 7317396Sgblack@eecs.umich.edu 7327396Sgblack@eecs.umich.edustatic inline float 7337396Sgblack@eecs.umich.edufpSubS(float a, float b) 7347396Sgblack@eecs.umich.edu{ 7357396Sgblack@eecs.umich.edu return a - b; 7367396Sgblack@eecs.umich.edu} 7377396Sgblack@eecs.umich.edu 7387396Sgblack@eecs.umich.edustatic inline double 7397396Sgblack@eecs.umich.edufpSubD(double a, double b) 7407396Sgblack@eecs.umich.edu{ 7417396Sgblack@eecs.umich.edu return a - b; 7427396Sgblack@eecs.umich.edu} 7437396Sgblack@eecs.umich.edu 7447396Sgblack@eecs.umich.edustatic inline float 7457396Sgblack@eecs.umich.edufpDivS(float a, float b) 7467396Sgblack@eecs.umich.edu{ 7477396Sgblack@eecs.umich.edu return a / b; 7487396Sgblack@eecs.umich.edu} 7497396Sgblack@eecs.umich.edu 7507396Sgblack@eecs.umich.edustatic inline double 7517396Sgblack@eecs.umich.edufpDivD(double a, double b) 7527396Sgblack@eecs.umich.edu{ 7537396Sgblack@eecs.umich.edu return a / b; 7547396Sgblack@eecs.umich.edu} 7557396Sgblack@eecs.umich.edu 7567396Sgblack@eecs.umich.edustatic inline float 7577396Sgblack@eecs.umich.edufpMulS(float a, float b) 7587396Sgblack@eecs.umich.edu{ 7597396Sgblack@eecs.umich.edu return a * b; 7607396Sgblack@eecs.umich.edu} 7617396Sgblack@eecs.umich.edu 7627396Sgblack@eecs.umich.edustatic inline double 7637396Sgblack@eecs.umich.edufpMulD(double a, double b) 7647396Sgblack@eecs.umich.edu{ 7657396Sgblack@eecs.umich.edu return a * b; 7667396Sgblack@eecs.umich.edu} 7677396Sgblack@eecs.umich.edu 7687396Sgblack@eecs.umich.educlass FpOp : public PredOp 7697375Sgblack@eecs.umich.edu{ 7707375Sgblack@eecs.umich.edu protected: 7717396Sgblack@eecs.umich.edu FpOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass) : 7727396Sgblack@eecs.umich.edu PredOp(mnem, _machInst, __opClass) 7737396Sgblack@eecs.umich.edu {} 7747396Sgblack@eecs.umich.edu 7757396Sgblack@eecs.umich.edu virtual float 7767396Sgblack@eecs.umich.edu doOp(float op1, float op2) const 7777396Sgblack@eecs.umich.edu { 7787396Sgblack@eecs.umich.edu panic("Unimplemented version of doOp called.\n"); 7797396Sgblack@eecs.umich.edu } 7807396Sgblack@eecs.umich.edu 7817396Sgblack@eecs.umich.edu virtual float 7827396Sgblack@eecs.umich.edu doOp(float op1) const 7837396Sgblack@eecs.umich.edu { 7847396Sgblack@eecs.umich.edu panic("Unimplemented version of doOp called.\n"); 7857396Sgblack@eecs.umich.edu } 7867396Sgblack@eecs.umich.edu 7877396Sgblack@eecs.umich.edu virtual double 7887396Sgblack@eecs.umich.edu doOp(double op1, double op2) const 7897396Sgblack@eecs.umich.edu { 7907396Sgblack@eecs.umich.edu panic("Unimplemented version of doOp called.\n"); 7917396Sgblack@eecs.umich.edu } 7927396Sgblack@eecs.umich.edu 7937396Sgblack@eecs.umich.edu virtual double 7947396Sgblack@eecs.umich.edu doOp(double op1) const 7957396Sgblack@eecs.umich.edu { 7967396Sgblack@eecs.umich.edu panic("Unimplemented version of doOp called.\n"); 7977396Sgblack@eecs.umich.edu } 7987396Sgblack@eecs.umich.edu 7997396Sgblack@eecs.umich.edu double 8007396Sgblack@eecs.umich.edu dbl(uint32_t low, uint32_t high) const 8017396Sgblack@eecs.umich.edu { 8027396Sgblack@eecs.umich.edu double junk = 0.0; 8037396Sgblack@eecs.umich.edu return bitsToFp((uint64_t)low | ((uint64_t)high << 32), junk); 8047396Sgblack@eecs.umich.edu } 8057396Sgblack@eecs.umich.edu 8067396Sgblack@eecs.umich.edu uint32_t 8077396Sgblack@eecs.umich.edu dblLow(double val) const 8087396Sgblack@eecs.umich.edu { 8097396Sgblack@eecs.umich.edu return fpToBits(val); 8107396Sgblack@eecs.umich.edu } 8117396Sgblack@eecs.umich.edu 8127396Sgblack@eecs.umich.edu uint32_t 8137396Sgblack@eecs.umich.edu dblHi(double val) const 8147396Sgblack@eecs.umich.edu { 8157396Sgblack@eecs.umich.edu return fpToBits(val) >> 32; 8167396Sgblack@eecs.umich.edu } 8177396Sgblack@eecs.umich.edu 8187396Sgblack@eecs.umich.edu template <class fpType> 8197396Sgblack@eecs.umich.edu fpType 8207396Sgblack@eecs.umich.edu binaryOp(FPSCR &fpscr, fpType op1, fpType op2, 8217396Sgblack@eecs.umich.edu fpType (*func)(fpType, fpType), 8227396Sgblack@eecs.umich.edu bool flush, uint32_t rMode) const 8237396Sgblack@eecs.umich.edu { 8247396Sgblack@eecs.umich.edu const bool single = (sizeof(fpType) == sizeof(float)); 8257396Sgblack@eecs.umich.edu fpType junk = 0.0; 8267396Sgblack@eecs.umich.edu 8277396Sgblack@eecs.umich.edu if (flush && flushToZero(op1, op2)) 8287396Sgblack@eecs.umich.edu fpscr.idc = 1; 8297396Sgblack@eecs.umich.edu VfpSavedState state = prepFpState(rMode); 8307396Sgblack@eecs.umich.edu __asm__ __volatile__ ("" : "=m" (op1), "=m" (op2), "=m" (state) 8317396Sgblack@eecs.umich.edu : "m" (op1), "m" (op2), "m" (state)); 8327396Sgblack@eecs.umich.edu fpType dest = func(op1, op2); 8337396Sgblack@eecs.umich.edu __asm__ __volatile__ ("" : "=m" (dest) : "m" (dest)); 8347396Sgblack@eecs.umich.edu 8357396Sgblack@eecs.umich.edu int fpClass = std::fpclassify(dest); 8367396Sgblack@eecs.umich.edu // Get NAN behavior right. This varies between x86 and ARM. 8377396Sgblack@eecs.umich.edu if (fpClass == FP_NAN) { 8387396Sgblack@eecs.umich.edu const bool single = (sizeof(fpType) == sizeof(float)); 8397396Sgblack@eecs.umich.edu const uint64_t qnan = 8407396Sgblack@eecs.umich.edu single ? 0x7fc00000 : ULL(0x7ff8000000000000); 8417396Sgblack@eecs.umich.edu const bool nan1 = std::isnan(op1); 8427396Sgblack@eecs.umich.edu const bool nan2 = std::isnan(op2); 8437396Sgblack@eecs.umich.edu const bool signal1 = nan1 && ((fpToBits(op1) & qnan) != qnan); 8447396Sgblack@eecs.umich.edu const bool signal2 = nan2 && ((fpToBits(op2) & qnan) != qnan); 8457396Sgblack@eecs.umich.edu if ((!nan1 && !nan2) || (fpscr.dn == 1)) { 8467396Sgblack@eecs.umich.edu dest = bitsToFp(qnan, junk); 8477396Sgblack@eecs.umich.edu } else if (signal1) { 8487396Sgblack@eecs.umich.edu dest = bitsToFp(fpToBits(op1) | qnan, junk); 8497396Sgblack@eecs.umich.edu } else if (signal2) { 8507396Sgblack@eecs.umich.edu dest = bitsToFp(fpToBits(op2) | qnan, junk); 8517396Sgblack@eecs.umich.edu } else if (nan1) { 8527396Sgblack@eecs.umich.edu dest = op1; 8537396Sgblack@eecs.umich.edu } else if (nan2) { 8547396Sgblack@eecs.umich.edu dest = op2; 8557396Sgblack@eecs.umich.edu } 8567396Sgblack@eecs.umich.edu } else if (flush && flushToZero(dest)) { 8577396Sgblack@eecs.umich.edu feraiseexcept(FeUnderflow); 8587396Sgblack@eecs.umich.edu } else if (( 8597396Sgblack@eecs.umich.edu (single && (dest == bitsToFp(0x00800000, junk) || 8607396Sgblack@eecs.umich.edu dest == bitsToFp(0x80800000, junk))) || 8617396Sgblack@eecs.umich.edu (!single && 8627396Sgblack@eecs.umich.edu (dest == bitsToFp(ULL(0x0010000000000000), junk) || 8637396Sgblack@eecs.umich.edu dest == bitsToFp(ULL(0x8010000000000000), junk))) 8647396Sgblack@eecs.umich.edu ) && rMode != VfpRoundZero) { 8657396Sgblack@eecs.umich.edu /* 8667396Sgblack@eecs.umich.edu * Correct for the fact that underflow is detected -before- rounding 8677396Sgblack@eecs.umich.edu * in ARM and -after- rounding in x86. 8687396Sgblack@eecs.umich.edu */ 8697396Sgblack@eecs.umich.edu fesetround(FeRoundZero); 8707396Sgblack@eecs.umich.edu __asm__ __volatile__ ("" : "=m" (op1), "=m" (op2) 8717396Sgblack@eecs.umich.edu : "m" (op1), "m" (op2)); 8727396Sgblack@eecs.umich.edu fpType temp = func(op1, op2); 8737396Sgblack@eecs.umich.edu __asm__ __volatile__ ("" : "=m" (temp) : "m" (temp)); 8747396Sgblack@eecs.umich.edu if (flush && flushToZero(temp)) { 8757396Sgblack@eecs.umich.edu dest = temp; 8767396Sgblack@eecs.umich.edu } 8777396Sgblack@eecs.umich.edu } 8787396Sgblack@eecs.umich.edu finishVfp(fpscr, state); 8797396Sgblack@eecs.umich.edu return dest; 8807396Sgblack@eecs.umich.edu } 8817396Sgblack@eecs.umich.edu 8827396Sgblack@eecs.umich.edu template <class fpType> 8837396Sgblack@eecs.umich.edu fpType 8847396Sgblack@eecs.umich.edu unaryOp(FPSCR &fpscr, fpType op1, 8857396Sgblack@eecs.umich.edu fpType (*func)(fpType), 8867396Sgblack@eecs.umich.edu bool flush, uint32_t rMode) const 8877396Sgblack@eecs.umich.edu { 8887396Sgblack@eecs.umich.edu const bool single = (sizeof(fpType) == sizeof(float)); 8897396Sgblack@eecs.umich.edu fpType junk = 0.0; 8907396Sgblack@eecs.umich.edu 8917396Sgblack@eecs.umich.edu if (flush && flushToZero(op1)) 8927396Sgblack@eecs.umich.edu fpscr.idc = 1; 8937396Sgblack@eecs.umich.edu VfpSavedState state = prepFpState(rMode); 8947396Sgblack@eecs.umich.edu __asm__ __volatile__ ("" : "=m" (op1), "=m" (state) 8957396Sgblack@eecs.umich.edu : "m" (op1), "m" (state)); 8967396Sgblack@eecs.umich.edu fpType dest = func(op1); 8977396Sgblack@eecs.umich.edu __asm__ __volatile__ ("" : "=m" (dest) : "m" (dest)); 8987396Sgblack@eecs.umich.edu 8997396Sgblack@eecs.umich.edu int fpClass = std::fpclassify(dest); 9007396Sgblack@eecs.umich.edu // Get NAN behavior right. This varies between x86 and ARM. 9017396Sgblack@eecs.umich.edu if (fpClass == FP_NAN) { 9027396Sgblack@eecs.umich.edu const bool single = (sizeof(fpType) == sizeof(float)); 9037396Sgblack@eecs.umich.edu const uint64_t qnan = 9047396Sgblack@eecs.umich.edu single ? 0x7fc00000 : ULL(0x7ff8000000000000); 9057396Sgblack@eecs.umich.edu const bool nan = std::isnan(op1); 9067396Sgblack@eecs.umich.edu if (!nan || fpscr.dn == 1) { 9077396Sgblack@eecs.umich.edu dest = bitsToFp(qnan, junk); 9087396Sgblack@eecs.umich.edu } else if (nan) { 9097396Sgblack@eecs.umich.edu dest = bitsToFp(fpToBits(op1) | qnan, junk); 9107396Sgblack@eecs.umich.edu } 9117396Sgblack@eecs.umich.edu } else if (flush && flushToZero(dest)) { 9127396Sgblack@eecs.umich.edu feraiseexcept(FeUnderflow); 9137396Sgblack@eecs.umich.edu } else if (( 9147396Sgblack@eecs.umich.edu (single && (dest == bitsToFp(0x00800000, junk) || 9157396Sgblack@eecs.umich.edu dest == bitsToFp(0x80800000, junk))) || 9167396Sgblack@eecs.umich.edu (!single && 9177396Sgblack@eecs.umich.edu (dest == bitsToFp(ULL(0x0010000000000000), junk) || 9187396Sgblack@eecs.umich.edu dest == bitsToFp(ULL(0x8010000000000000), junk))) 9197396Sgblack@eecs.umich.edu ) && rMode != VfpRoundZero) { 9207396Sgblack@eecs.umich.edu /* 9217396Sgblack@eecs.umich.edu * Correct for the fact that underflow is detected -before- rounding 9227396Sgblack@eecs.umich.edu * in ARM and -after- rounding in x86. 9237396Sgblack@eecs.umich.edu */ 9247396Sgblack@eecs.umich.edu fesetround(FeRoundZero); 9257396Sgblack@eecs.umich.edu __asm__ __volatile__ ("" : "=m" (op1) : "m" (op1)); 9267396Sgblack@eecs.umich.edu fpType temp = func(op1); 9277396Sgblack@eecs.umich.edu __asm__ __volatile__ ("" : "=m" (temp) : "m" (temp)); 9287396Sgblack@eecs.umich.edu if (flush && flushToZero(temp)) { 9297396Sgblack@eecs.umich.edu dest = temp; 9307396Sgblack@eecs.umich.edu } 9317396Sgblack@eecs.umich.edu } 9327396Sgblack@eecs.umich.edu finishVfp(fpscr, state); 9337396Sgblack@eecs.umich.edu return dest; 9347396Sgblack@eecs.umich.edu } 9357396Sgblack@eecs.umich.edu}; 9367396Sgblack@eecs.umich.edu 9377396Sgblack@eecs.umich.educlass FpRegRegOp : public FpOp 9387396Sgblack@eecs.umich.edu{ 9397396Sgblack@eecs.umich.edu protected: 9407396Sgblack@eecs.umich.edu IntRegIndex dest; 9417396Sgblack@eecs.umich.edu IntRegIndex op1; 9427396Sgblack@eecs.umich.edu 9437396Sgblack@eecs.umich.edu FpRegRegOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass, 9447396Sgblack@eecs.umich.edu IntRegIndex _dest, IntRegIndex _op1, 9457396Sgblack@eecs.umich.edu VfpMicroMode mode = VfpNotAMicroop) : 9467396Sgblack@eecs.umich.edu FpOp(mnem, _machInst, __opClass), dest(_dest), op1(_op1) 9477375Sgblack@eecs.umich.edu { 9487375Sgblack@eecs.umich.edu setVfpMicroFlags(mode, flags); 9497375Sgblack@eecs.umich.edu } 9507396Sgblack@eecs.umich.edu 9517396Sgblack@eecs.umich.edu std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const; 9527375Sgblack@eecs.umich.edu}; 9537375Sgblack@eecs.umich.edu 9547396Sgblack@eecs.umich.educlass FpRegImmOp : public FpOp 9557375Sgblack@eecs.umich.edu{ 9567375Sgblack@eecs.umich.edu protected: 9577396Sgblack@eecs.umich.edu IntRegIndex dest; 9587396Sgblack@eecs.umich.edu uint64_t imm; 9597396Sgblack@eecs.umich.edu 9607396Sgblack@eecs.umich.edu FpRegImmOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass, 9617396Sgblack@eecs.umich.edu IntRegIndex _dest, uint64_t _imm, 9627396Sgblack@eecs.umich.edu VfpMicroMode mode = VfpNotAMicroop) : 9637396Sgblack@eecs.umich.edu FpOp(mnem, _machInst, __opClass), dest(_dest), imm(_imm) 9647375Sgblack@eecs.umich.edu { 9657375Sgblack@eecs.umich.edu setVfpMicroFlags(mode, flags); 9667375Sgblack@eecs.umich.edu } 9677396Sgblack@eecs.umich.edu 9687396Sgblack@eecs.umich.edu std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const; 9697375Sgblack@eecs.umich.edu}; 9707375Sgblack@eecs.umich.edu 9717396Sgblack@eecs.umich.educlass FpRegRegImmOp : public FpOp 9727375Sgblack@eecs.umich.edu{ 9737375Sgblack@eecs.umich.edu protected: 9747396Sgblack@eecs.umich.edu IntRegIndex dest; 9757396Sgblack@eecs.umich.edu IntRegIndex op1; 9767396Sgblack@eecs.umich.edu uint64_t imm; 9777396Sgblack@eecs.umich.edu 9787396Sgblack@eecs.umich.edu FpRegRegImmOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass, 9797396Sgblack@eecs.umich.edu IntRegIndex _dest, IntRegIndex _op1, 9807396Sgblack@eecs.umich.edu uint64_t _imm, VfpMicroMode mode = VfpNotAMicroop) : 9817396Sgblack@eecs.umich.edu FpOp(mnem, _machInst, __opClass), dest(_dest), op1(_op1), imm(_imm) 9827375Sgblack@eecs.umich.edu { 9837375Sgblack@eecs.umich.edu setVfpMicroFlags(mode, flags); 9847375Sgblack@eecs.umich.edu } 9857396Sgblack@eecs.umich.edu 9867396Sgblack@eecs.umich.edu std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const; 9877375Sgblack@eecs.umich.edu}; 9887375Sgblack@eecs.umich.edu 9897396Sgblack@eecs.umich.educlass FpRegRegRegOp : public FpOp 9907375Sgblack@eecs.umich.edu{ 9917375Sgblack@eecs.umich.edu protected: 9927396Sgblack@eecs.umich.edu IntRegIndex dest; 9937396Sgblack@eecs.umich.edu IntRegIndex op1; 9947396Sgblack@eecs.umich.edu IntRegIndex op2; 9957396Sgblack@eecs.umich.edu 9967396Sgblack@eecs.umich.edu FpRegRegRegOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass, 9977396Sgblack@eecs.umich.edu IntRegIndex _dest, IntRegIndex _op1, IntRegIndex _op2, 9987396Sgblack@eecs.umich.edu VfpMicroMode mode = VfpNotAMicroop) : 9997396Sgblack@eecs.umich.edu FpOp(mnem, _machInst, __opClass), dest(_dest), op1(_op1), op2(_op2) 10007375Sgblack@eecs.umich.edu { 10017375Sgblack@eecs.umich.edu setVfpMicroFlags(mode, flags); 10027375Sgblack@eecs.umich.edu } 10037396Sgblack@eecs.umich.edu 10047396Sgblack@eecs.umich.edu std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const; 10057375Sgblack@eecs.umich.edu}; 10067375Sgblack@eecs.umich.edu 10077384Sgblack@eecs.umich.edu} 10087384Sgblack@eecs.umich.edu 10097375Sgblack@eecs.umich.edu#endif //__ARCH_ARM_INSTS_VFP_HH__ 1010