ARMSubtarget.h revision 7b4d31176efe6894bcfaa05257dd5783acda5ddc
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" 200855dee564f80160abf95497475306af38ab7f84David Goodwin#include "ARMBaseRegisterInfo.h" 21a8e2989ece6dc46df59b0768184028257f913843Evan Cheng#include <string> 22a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 23a8e2989ece6dc46df59b0768184028257f913843Evan Chengnamespace llvm { 24e4e4ed3b56f63e9343e01bf0b2ecd7c1f45d296cEvan Chengclass GlobalValue; 25a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 26a8e2989ece6dc46df59b0768184028257f913843Evan Chengclass ARMSubtarget : public TargetSubtarget { 27a8e2989ece6dc46df59b0768184028257f913843Evan Chengprotected: 28a8e2989ece6dc46df59b0768184028257f913843Evan Cheng enum ARMArchEnum { 29d6b463225674c10511b00f8f631a89b6da5afc54Evan Cheng V4, V4T, V5T, V5TE, V6, V6M, V6T2, V7A, V7M 30a8e2989ece6dc46df59b0768184028257f913843Evan Cheng }; 31a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 326d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov enum ARMFPEnum { 336d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov None, VFPv2, VFPv3, NEON 346d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov }; 356d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov 36d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov enum ThumbTypeEnum { 37d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov Thumb1, 38d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov Thumb2 39d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov }; 40d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov 41ce7bf1c55f5238870bae2909cd368151f1d813d1Anton Korobeynikov /// ARMArchVersion - ARM architecture version: V4, V4T (base), V5T, V5TE, 42b1dc393bd56365ad8fabb51f22c2f3ace707c39aJim Grosbach /// V6, V6T2, V7A, V7M. 43a8e2989ece6dc46df59b0768184028257f913843Evan Cheng ARMArchEnum ARMArchVersion; 44a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 456d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov /// ARMFPUType - Floating Point Unit type. 466d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov ARMFPEnum ARMFPUType; 47a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 481f0e404c87675ce75e34bcd91395c660fe1d4ac1David Goodwin /// UseNEONForSinglePrecisionFP - if the NEONFP attribute has been 491f0e404c87675ce75e34bcd91395c660fe1d4ac1David Goodwin /// specified. Use the method useNEONForSinglePrecisionFP() to 501f0e404c87675ce75e34bcd91395c660fe1d4ac1David Goodwin /// determine if NEON should actually be used. 5142a83f2d15cbbc08f5be19856198e3c885221e9cDavid Goodwin bool UseNEONForSinglePrecisionFP; 5242a83f2d15cbbc08f5be19856198e3c885221e9cDavid Goodwin 536b2e8dc9a0e4ebda645ee4eba95711eb630b4edfJim Grosbach /// SlowVMLx - If the VFP2 instructions are available, indicates whether 546b2e8dc9a0e4ebda645ee4eba95711eb630b4edfJim Grosbach /// the VML[AS] instructions are slow (if so, don't use them). 556b2e8dc9a0e4ebda645ee4eba95711eb630b4edfJim Grosbach bool SlowVMLx; 562676737e5ed3e4b5c89b4d06b60d998e9318eb73Jim Grosbach 577a415999625f9791a8a7eea2027e628e29de15c0Evan Cheng /// SlowFPBrcc - True if floating point compare + branch is slow. 587a415999625f9791a8a7eea2027e628e29de15c0Evan Cheng bool SlowFPBrcc; 597a415999625f9791a8a7eea2027e628e29de15c0Evan Cheng 6070459bef9ccd73b3a2a44fdd62f2509861112745Anton Korobeynikov /// IsThumb - True if we are in thumb mode, false if in ARM mode. 6170459bef9ccd73b3a2a44fdd62f2509861112745Anton Korobeynikov bool IsThumb; 6270459bef9ccd73b3a2a44fdd62f2509861112745Anton Korobeynikov 6370459bef9ccd73b3a2a44fdd62f2509861112745Anton Korobeynikov /// ThumbMode - Indicates supported Thumb version. 64d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov ThumbTypeEnum ThumbMode; 65a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 667b4d31176efe6894bcfaa05257dd5783acda5ddcEvan Cheng /// NoARM - True if subtarget does not support ARM mode execution. 677b4d31176efe6894bcfaa05257dd5783acda5ddcEvan Cheng bool NoARM; 687b4d31176efe6894bcfaa05257dd5783acda5ddcEvan Cheng 690dad89fa94536284d51f60868326294b725a0c61David Goodwin /// PostRAScheduler - True if using post-register-allocation scheduler. 700dad89fa94536284d51f60868326294b725a0c61David Goodwin bool PostRAScheduler; 710dad89fa94536284d51f60868326294b725a0c61David Goodwin 72a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// IsR9Reserved - True if R9 is a not available as general purpose register. 73a8e2989ece6dc46df59b0768184028257f913843Evan Cheng bool IsR9Reserved; 743630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio 755cdc3a949af0cef7f2163f8a7acbf3049c226321Anton Korobeynikov /// UseMovt - True if MOVT / MOVW pairs are used for materialization of 32-bit 765cdc3a949af0cef7f2163f8a7acbf3049c226321Anton Korobeynikov /// imms (including global addresses). 775cdc3a949af0cef7f2163f8a7acbf3049c226321Anton Korobeynikov bool UseMovt; 785cdc3a949af0cef7f2163f8a7acbf3049c226321Anton Korobeynikov 79631379e79c0971c5bac13629b8caf8912ed4c35cAnton Korobeynikov /// HasFP16 - True if subtarget supports half-precision FP (We support VFP+HF 80631379e79c0971c5bac13629b8caf8912ed4c35cAnton Korobeynikov /// only so far) 81631379e79c0971c5bac13629b8caf8912ed4c35cAnton Korobeynikov bool HasFP16; 82631379e79c0971c5bac13629b8caf8912ed4c35cAnton Korobeynikov 8329402132f3e890a2771818f44987ede213297431Jim Grosbach /// HasHardwareDivide - True if subtarget supports [su]div 8429402132f3e890a2771818f44987ede213297431Jim Grosbach bool HasHardwareDivide; 8529402132f3e890a2771818f44987ede213297431Jim Grosbach 8629402132f3e890a2771818f44987ede213297431Jim Grosbach /// HasT2ExtractPack - True if subtarget supports thumb2 extract/pack 8729402132f3e890a2771818f44987ede213297431Jim Grosbach /// instructions. 8829402132f3e890a2771818f44987ede213297431Jim Grosbach bool HasT2ExtractPack; 8929402132f3e890a2771818f44987ede213297431Jim Grosbach 9011db068721d44fd5f9b0c2a3a4c90f813d2eae9cEvan Cheng /// HasDataBarrier - True if the subtarget supports DMB / DSB data barrier 9111db068721d44fd5f9b0c2a3a4c90f813d2eae9cEvan Cheng /// instructions. 9211db068721d44fd5f9b0c2a3a4c90f813d2eae9cEvan Cheng bool HasDataBarrier; 9311db068721d44fd5f9b0c2a3a4c90f813d2eae9cEvan Cheng 94e44be6381609d31b2d8879dbd5107e01404fa475Evan Cheng /// Pref32BitThumb - If true, codegen would prefer 32-bit Thumb instructions 95e44be6381609d31b2d8879dbd5107e01404fa475Evan Cheng /// over 16-bit ones. 96e44be6381609d31b2d8879dbd5107e01404fa475Evan Cheng bool Pref32BitThumb; 97e44be6381609d31b2d8879dbd5107e01404fa475Evan Cheng 98a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// stackAlignment - The minimum alignment known to hold of the stack frame on 99a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// entry to the function and which must be maintained by every function. 100a8e2989ece6dc46df59b0768184028257f913843Evan Cheng unsigned stackAlignment; 101a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 10241a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov /// CPUString - String name of used CPU. 10341a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov std::string CPUString; 10441a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov 1058557c2bcb8002169d890eb8485e9a1d7219e4343Evan Cheng /// Selected instruction itineraries (one entry per itinerary class.) 1068557c2bcb8002169d890eb8485e9a1d7219e4343Evan Cheng InstrItineraryData InstrItins; 107764ab52dd80310a205c9888bf166d09dab858f90Jim Grosbach 108a8e2989ece6dc46df59b0768184028257f913843Evan Cheng public: 1091a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng enum { 1101a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng isELF, isDarwin 1111a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng } TargetType; 1121a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng 1133630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio enum { 1143630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio ARM_ABI_APCS, 1153630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio ARM_ABI_AAPCS // ARM EABI 1163630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio } TargetABI; 1173630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio 118a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// This constructor initializes the data members to match that 1193be03406c9c3b2075d5ae416499af2f15f703d6fDaniel Dunbar /// of the specified triple. 120a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// 1213be03406c9c3b2075d5ae416499af2f15f703d6fDaniel Dunbar ARMSubtarget(const std::string &TT, const std::string &FS, bool isThumb); 122a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 123707e0184233f27e0e9f9aee0309f2daab8cfe7f8Dan Gohman /// getMaxInlineSizeThreshold - Returns the maximum memset / memcpy size 124707e0184233f27e0e9f9aee0309f2daab8cfe7f8Dan Gohman /// that still makes it profitable to inline the call. 125e0703c84ddeb1a1276de4e38210c1127ef5df130Rafael Espindola unsigned getMaxInlineSizeThreshold() const { 1264d6113ee0699ac1eff46971881179de53e2eb810Bob Wilson // FIXME: For now, we don't lower memcpy's to loads / stores for Thumb1. 1274d6113ee0699ac1eff46971881179de53e2eb810Bob Wilson // Change this once Thumb1 ldmia / stmia support is added. 1284d6113ee0699ac1eff46971881179de53e2eb810Bob Wilson return isThumb1Only() ? 0 : 64; 129e0703c84ddeb1a1276de4e38210c1127ef5df130Rafael Espindola } 1306d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov /// ParseSubtargetFeatures - Parses features string setting specified 131a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// subtarget options. Definition of function is auto generated by tblgen. 13241a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov std::string ParseSubtargetFeatures(const std::string &FS, 13341a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov const std::string &CPU); 134a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 1356d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasV4TOps() const { return ARMArchVersion >= V4T; } 1366d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasV5TOps() const { return ARMArchVersion >= V5T; } 137a8e2989ece6dc46df59b0768184028257f913843Evan Cheng bool hasV5TEOps() const { return ARMArchVersion >= V5TE; } 1386d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasV6Ops() const { return ARMArchVersion >= V6; } 139e481f127497b20d3abe625ca4c086f85bf8b126fBob Wilson bool hasV6T2Ops() const { return ARMArchVersion >= V6T2; } 1406d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasV7Ops() const { return ARMArchVersion >= V7A; } 141a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 1427b4d31176efe6894bcfaa05257dd5783acda5ddcEvan Cheng bool hasARMOps() const { return !NoARM; } 1437b4d31176efe6894bcfaa05257dd5783acda5ddcEvan Cheng 1446d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasVFP2() const { return ARMFPUType >= VFPv2; } 1456d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasVFP3() const { return ARMFPUType >= VFPv3; } 1466d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasNEON() const { return ARMFPUType >= NEON; } 147764ab52dd80310a205c9888bf166d09dab858f90Jim Grosbach bool useNEONForSinglePrecisionFP() const { 14842a83f2d15cbbc08f5be19856198e3c885221e9cDavid Goodwin return hasNEON() && UseNEONForSinglePrecisionFP; } 149eae216c6d3d29cb9024ddf436a8f2ce222bb9ec8Shantonu Sen bool hasDivide() const { return HasHardwareDivide; } 150eae216c6d3d29cb9024ddf436a8f2ce222bb9ec8Shantonu Sen bool hasT2ExtractPack() const { return HasT2ExtractPack; } 15111db068721d44fd5f9b0c2a3a4c90f813d2eae9cEvan Cheng bool hasDataBarrier() const { return HasDataBarrier; } 1526b2e8dc9a0e4ebda645ee4eba95711eb630b4edfJim Grosbach bool useVMLx() const {return hasVFP2() && !SlowVMLx; } 1537a415999625f9791a8a7eea2027e628e29de15c0Evan Cheng bool isFPBrccSlow() const { return SlowFPBrcc; } 154e44be6381609d31b2d8879dbd5107e01404fa475Evan Cheng bool prefers32BitThumb() const { return Pref32BitThumb; } 155764ab52dd80310a205c9888bf166d09dab858f90Jim Grosbach 156631379e79c0971c5bac13629b8caf8912ed4c35cAnton Korobeynikov bool hasFP16() const { return HasFP16; } 157631379e79c0971c5bac13629b8caf8912ed4c35cAnton Korobeynikov 1581a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng bool isTargetDarwin() const { return TargetType == isDarwin; } 1591a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng bool isTargetELF() const { return TargetType == isELF; } 1601a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng 1613630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio bool isAPCS_ABI() const { return TargetABI == ARM_ABI_APCS; } 1623630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio bool isAAPCS_ABI() const { return TargetABI == ARM_ABI_AAPCS; } 1633630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio 16470459bef9ccd73b3a2a44fdd62f2509861112745Anton Korobeynikov bool isThumb() const { return IsThumb; } 165bb6296234238aab74a531b382d92342269bea902Anton Korobeynikov bool isThumb1Only() const { return IsThumb && (ThumbMode == Thumb1); } 1663147fb2cff9ca0d258f8ab20ff23b9c447024df1Evan Cheng bool isThumb2() const { return IsThumb && (ThumbMode == Thumb2); } 167d770d9e7d1f5c65b185897dcf226b3fc64598683Evan Cheng bool hasThumb2() const { return ThumbMode >= Thumb2; } 168a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 169a8e2989ece6dc46df59b0768184028257f913843Evan Cheng bool isR9Reserved() const { return IsR9Reserved; } 170a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 1715cdc3a949af0cef7f2163f8a7acbf3049c226321Anton Korobeynikov bool useMovt() const { return UseMovt && hasV6T2Ops(); } 1725cdc3a949af0cef7f2163f8a7acbf3049c226321Anton Korobeynikov 17341a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov const std::string & getCPUString() const { return CPUString; } 1745cdc3a949af0cef7f2163f8a7acbf3049c226321Anton Korobeynikov 175c2e8a7e8d2ab156afaa8ab0d0317dd9ee3db7d30David Goodwin /// enablePostRAScheduler - True at 'More' optimization. 1764c3715c2e5e17d7216a96ac2baf9720630f04408David Goodwin bool enablePostRAScheduler(CodeGenOpt::Level OptLevel, 1770855dee564f80160abf95497475306af38ab7f84David Goodwin TargetSubtarget::AntiDepBreakMode& Mode, 17887d21b92fc42f6b3bd8567a83fc5b5191c1205e5David Goodwin RegClassVector& CriticalPathRCs) const; 17941a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov 180764ab52dd80310a205c9888bf166d09dab858f90Jim Grosbach /// getInstrItins - Return the instruction itineraies based on subtarget 1818557c2bcb8002169d890eb8485e9a1d7219e4343Evan Cheng /// selection. 1828557c2bcb8002169d890eb8485e9a1d7219e4343Evan Cheng const InstrItineraryData &getInstrItineraryData() const { return InstrItins; } 1838557c2bcb8002169d890eb8485e9a1d7219e4343Evan Cheng 184a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// getStackAlignment - Returns the minimum alignment known to hold of the 185a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// stack frame on entry to the function and which must be maintained by every 186a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// function for this subtarget. 187a8e2989ece6dc46df59b0768184028257f913843Evan Cheng unsigned getStackAlignment() const { return stackAlignment; } 188e4e4ed3b56f63e9343e01bf0b2ecd7c1f45d296cEvan Cheng 189e4e4ed3b56f63e9343e01bf0b2ecd7c1f45d296cEvan Cheng /// GVIsIndirectSymbol - true if the GV will be accessed via an indirect 190e4e4ed3b56f63e9343e01bf0b2ecd7c1f45d296cEvan Cheng /// symbol. 19146510a73e977273ec67747eb34cbdb43f815e451Dan Gohman bool GVIsIndirectSymbol(const GlobalValue *GV, Reloc::Model RelocM) const; 192a8e2989ece6dc46df59b0768184028257f913843Evan Cheng}; 193a8e2989ece6dc46df59b0768184028257f913843Evan Cheng} // End llvm namespace 194a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 195a8e2989ece6dc46df59b0768184028257f913843Evan Cheng#endif // ARMSUBTARGET_H 196