ARMSubtarget.h revision 4c3715c2e5e17d7216a96ac2baf9720630f04408
1a8e2989ece6dc46df59b0768184028257f913843Evan Cheng//=====---- ARMSubtarget.h - Define Subtarget for the ARM -----*- C++ -*--====// 2a8e2989ece6dc46df59b0768184028257f913843Evan Cheng// 3a8e2989ece6dc46df59b0768184028257f913843Evan Cheng// The LLVM Compiler Infrastructure 4a8e2989ece6dc46df59b0768184028257f913843Evan Cheng// 54ee451de366474b9c228b4e5fa573795a715216dChris Lattner// This file is distributed under the University of Illinois Open Source 64ee451de366474b9c228b4e5fa573795a715216dChris Lattner// License. See LICENSE.TXT for details. 7a8e2989ece6dc46df59b0768184028257f913843Evan Cheng// 8a8e2989ece6dc46df59b0768184028257f913843Evan Cheng//===----------------------------------------------------------------------===// 9a8e2989ece6dc46df59b0768184028257f913843Evan Cheng// 10a8e2989ece6dc46df59b0768184028257f913843Evan Cheng// This file declares the ARM specific subclass of TargetSubtarget. 11a8e2989ece6dc46df59b0768184028257f913843Evan Cheng// 12a8e2989ece6dc46df59b0768184028257f913843Evan Cheng//===----------------------------------------------------------------------===// 13a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 14a8e2989ece6dc46df59b0768184028257f913843Evan Cheng#ifndef ARMSUBTARGET_H 15a8e2989ece6dc46df59b0768184028257f913843Evan Cheng#define ARMSUBTARGET_H 16a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 178557c2bcb8002169d890eb8485e9a1d7219e4343Evan Cheng#include "llvm/Target/TargetInstrItineraries.h" 1863476a80404125e5196b6c09113c1d4796da0604Evan Cheng#include "llvm/Target/TargetMachine.h" 19a8e2989ece6dc46df59b0768184028257f913843Evan Cheng#include "llvm/Target/TargetSubtarget.h" 20a8e2989ece6dc46df59b0768184028257f913843Evan Cheng#include <string> 21a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 22a8e2989ece6dc46df59b0768184028257f913843Evan Chengnamespace llvm { 23e4e4ed3b56f63e9343e01bf0b2ecd7c1f45d296cEvan Chengclass GlobalValue; 24a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 25a8e2989ece6dc46df59b0768184028257f913843Evan Chengclass ARMSubtarget : public TargetSubtarget { 26a8e2989ece6dc46df59b0768184028257f913843Evan Chengprotected: 27a8e2989ece6dc46df59b0768184028257f913843Evan Cheng enum ARMArchEnum { 28fbbf1eeccf0cf469f0d8962b1341c8ba22a9dadbAnton Korobeynikov V4T, V5T, V5TE, V6, V6T2, V7A 29a8e2989ece6dc46df59b0768184028257f913843Evan Cheng }; 30a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 316d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov enum ARMFPEnum { 326d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov None, VFPv2, VFPv3, NEON 336d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov }; 346d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov 35d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov enum ThumbTypeEnum { 36d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov Thumb1, 37d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov Thumb2 38d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov }; 39d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov 406d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov /// ARMArchVersion - ARM architecture version: V4T (base), V5T, V5TE, 41d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov /// V6, V6T2, V7A. 42a8e2989ece6dc46df59b0768184028257f913843Evan Cheng ARMArchEnum ARMArchVersion; 43a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 446d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov /// ARMFPUType - Floating Point Unit type. 456d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov ARMFPEnum ARMFPUType; 46a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 471f0e404c87675ce75e34bcd91395c660fe1d4ac1David Goodwin /// UseNEONForSinglePrecisionFP - if the NEONFP attribute has been 481f0e404c87675ce75e34bcd91395c660fe1d4ac1David Goodwin /// specified. Use the method useNEONForSinglePrecisionFP() to 491f0e404c87675ce75e34bcd91395c660fe1d4ac1David Goodwin /// determine if NEON should actually be used. 5042a83f2d15cbbc08f5be19856198e3c885221e9cDavid Goodwin bool UseNEONForSinglePrecisionFP; 5142a83f2d15cbbc08f5be19856198e3c885221e9cDavid Goodwin 5270459bef9ccd73b3a2a44fdd62f2509861112745Anton Korobeynikov /// IsThumb - True if we are in thumb mode, false if in ARM mode. 5370459bef9ccd73b3a2a44fdd62f2509861112745Anton Korobeynikov bool IsThumb; 5470459bef9ccd73b3a2a44fdd62f2509861112745Anton Korobeynikov 5570459bef9ccd73b3a2a44fdd62f2509861112745Anton Korobeynikov /// ThumbMode - Indicates supported Thumb version. 56d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov ThumbTypeEnum ThumbMode; 57a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 580dad89fa94536284d51f60868326294b725a0c61David Goodwin /// PostRAScheduler - True if using post-register-allocation scheduler. 590dad89fa94536284d51f60868326294b725a0c61David Goodwin bool PostRAScheduler; 600dad89fa94536284d51f60868326294b725a0c61David Goodwin 61a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// IsR9Reserved - True if R9 is a not available as general purpose register. 62a8e2989ece6dc46df59b0768184028257f913843Evan Cheng bool IsR9Reserved; 633630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio 64a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// stackAlignment - The minimum alignment known to hold of the stack frame on 65a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// entry to the function and which must be maintained by every function. 66a8e2989ece6dc46df59b0768184028257f913843Evan Cheng unsigned stackAlignment; 67a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 6841a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov /// CPUString - String name of used CPU. 6941a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov std::string CPUString; 7041a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov 718557c2bcb8002169d890eb8485e9a1d7219e4343Evan Cheng /// Selected instruction itineraries (one entry per itinerary class.) 728557c2bcb8002169d890eb8485e9a1d7219e4343Evan Cheng InstrItineraryData InstrItins; 73764ab52dd80310a205c9888bf166d09dab858f90Jim Grosbach 74a8e2989ece6dc46df59b0768184028257f913843Evan Cheng public: 751a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng enum { 761a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng isELF, isDarwin 771a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng } TargetType; 781a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng 793630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio enum { 803630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio ARM_ABI_APCS, 813630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio ARM_ABI_AAPCS // ARM EABI 823630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio } TargetABI; 833630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio 84a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// This constructor initializes the data members to match that 853be03406c9c3b2075d5ae416499af2f15f703d6fDaniel Dunbar /// of the specified triple. 86a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// 873be03406c9c3b2075d5ae416499af2f15f703d6fDaniel Dunbar ARMSubtarget(const std::string &TT, const std::string &FS, bool isThumb); 88a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 89707e0184233f27e0e9f9aee0309f2daab8cfe7f8Dan Gohman /// getMaxInlineSizeThreshold - Returns the maximum memset / memcpy size 90707e0184233f27e0e9f9aee0309f2daab8cfe7f8Dan Gohman /// that still makes it profitable to inline the call. 91e0703c84ddeb1a1276de4e38210c1127ef5df130Rafael Espindola unsigned getMaxInlineSizeThreshold() const { 92e0703c84ddeb1a1276de4e38210c1127ef5df130Rafael Espindola // FIXME: For now, we don't lower memcpy's to loads / stores for Thumb. 93e0703c84ddeb1a1276de4e38210c1127ef5df130Rafael Espindola // Change this once Thumb ldmia / stmia support is added. 94e0703c84ddeb1a1276de4e38210c1127ef5df130Rafael Espindola return isThumb() ? 0 : 64; 95e0703c84ddeb1a1276de4e38210c1127ef5df130Rafael Espindola } 966d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov /// ParseSubtargetFeatures - Parses features string setting specified 97a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// subtarget options. Definition of function is auto generated by tblgen. 9841a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov std::string ParseSubtargetFeatures(const std::string &FS, 9941a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov const std::string &CPU); 100a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 1016d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasV4TOps() const { return ARMArchVersion >= V4T; } 1026d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasV5TOps() const { return ARMArchVersion >= V5T; } 103a8e2989ece6dc46df59b0768184028257f913843Evan Cheng bool hasV5TEOps() const { return ARMArchVersion >= V5TE; } 1046d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasV6Ops() const { return ARMArchVersion >= V6; } 105e481f127497b20d3abe625ca4c086f85bf8b126fBob Wilson bool hasV6T2Ops() const { return ARMArchVersion >= V6T2; } 1066d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasV7Ops() const { return ARMArchVersion >= V7A; } 107a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 1086d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasVFP2() const { return ARMFPUType >= VFPv2; } 1096d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasVFP3() const { return ARMFPUType >= VFPv3; } 1106d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasNEON() const { return ARMFPUType >= NEON; } 111764ab52dd80310a205c9888bf166d09dab858f90Jim Grosbach bool useNEONForSinglePrecisionFP() const { 11242a83f2d15cbbc08f5be19856198e3c885221e9cDavid Goodwin return hasNEON() && UseNEONForSinglePrecisionFP; } 113764ab52dd80310a205c9888bf166d09dab858f90Jim Grosbach 1141a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng bool isTargetDarwin() const { return TargetType == isDarwin; } 1151a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng bool isTargetELF() const { return TargetType == isELF; } 1161a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng 1173630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio bool isAPCS_ABI() const { return TargetABI == ARM_ABI_APCS; } 1183630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio bool isAAPCS_ABI() const { return TargetABI == ARM_ABI_AAPCS; } 1193630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio 12070459bef9ccd73b3a2a44fdd62f2509861112745Anton Korobeynikov bool isThumb() const { return IsThumb; } 121bb6296234238aab74a531b382d92342269bea902Anton Korobeynikov bool isThumb1Only() const { return IsThumb && (ThumbMode == Thumb1); } 1223147fb2cff9ca0d258f8ab20ff23b9c447024df1Evan Cheng bool isThumb2() const { return IsThumb && (ThumbMode == Thumb2); } 123d770d9e7d1f5c65b185897dcf226b3fc64598683Evan Cheng bool hasThumb2() const { return ThumbMode >= Thumb2; } 124a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 125a8e2989ece6dc46df59b0768184028257f913843Evan Cheng bool isR9Reserved() const { return IsR9Reserved; } 126a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 12741a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov const std::string & getCPUString() const { return CPUString; } 1280dad89fa94536284d51f60868326294b725a0c61David Goodwin 129fa16354e0370fe884830286923352268b036737dEvan Cheng /// enablePostRAScheduler - True at 'More' optimization except 130fa16354e0370fe884830286923352268b036737dEvan Cheng /// for Thumb1. 1314c3715c2e5e17d7216a96ac2baf9720630f04408David Goodwin bool enablePostRAScheduler(CodeGenOpt::Level OptLevel, 1324c3715c2e5e17d7216a96ac2baf9720630f04408David Goodwin TargetSubtarget::AntiDepBreakMode& mode) const { 1334c3715c2e5e17d7216a96ac2baf9720630f04408David Goodwin mode = TargetSubtarget::ANTIDEP_NONE; 134fa16354e0370fe884830286923352268b036737dEvan Cheng return PostRAScheduler && OptLevel >= CodeGenOpt::Default; 135fa16354e0370fe884830286923352268b036737dEvan Cheng } 13641a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov 137764ab52dd80310a205c9888bf166d09dab858f90Jim Grosbach /// getInstrItins - Return the instruction itineraies based on subtarget 1388557c2bcb8002169d890eb8485e9a1d7219e4343Evan Cheng /// selection. 1398557c2bcb8002169d890eb8485e9a1d7219e4343Evan Cheng const InstrItineraryData &getInstrItineraryData() const { return InstrItins; } 1408557c2bcb8002169d890eb8485e9a1d7219e4343Evan Cheng 141a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// getStackAlignment - Returns the minimum alignment known to hold of the 142a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// stack frame on entry to the function and which must be maintained by every 143a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// function for this subtarget. 144a8e2989ece6dc46df59b0768184028257f913843Evan Cheng unsigned getStackAlignment() const { return stackAlignment; } 145e4e4ed3b56f63e9343e01bf0b2ecd7c1f45d296cEvan Cheng 146e4e4ed3b56f63e9343e01bf0b2ecd7c1f45d296cEvan Cheng /// GVIsIndirectSymbol - true if the GV will be accessed via an indirect 147e4e4ed3b56f63e9343e01bf0b2ecd7c1f45d296cEvan Cheng /// symbol. 14863476a80404125e5196b6c09113c1d4796da0604Evan Cheng bool GVIsIndirectSymbol(GlobalValue *GV, Reloc::Model RelocM) const; 149a8e2989ece6dc46df59b0768184028257f913843Evan Cheng}; 150a8e2989ece6dc46df59b0768184028257f913843Evan Cheng} // End llvm namespace 151a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 152a8e2989ece6dc46df59b0768184028257f913843Evan Cheng#endif // ARMSUBTARGET_H 153