ARMSubtarget.h revision e4e4ed3b56f63e9343e01bf0b2ecd7c1f45d296c
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" 18a8e2989ece6dc46df59b0768184028257f913843Evan Cheng#include "llvm/Target/TargetSubtarget.h" 19a8e2989ece6dc46df59b0768184028257f913843Evan Cheng#include <string> 20a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 21a8e2989ece6dc46df59b0768184028257f913843Evan Chengnamespace llvm { 22e4e4ed3b56f63e9343e01bf0b2ecd7c1f45d296cEvan Chengclass GlobalValue; 23a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 24a8e2989ece6dc46df59b0768184028257f913843Evan Chengclass ARMSubtarget : public TargetSubtarget { 25a8e2989ece6dc46df59b0768184028257f913843Evan Chengprotected: 26a8e2989ece6dc46df59b0768184028257f913843Evan Cheng enum ARMArchEnum { 27fbbf1eeccf0cf469f0d8962b1341c8ba22a9dadbAnton Korobeynikov V4T, V5T, V5TE, V6, V6T2, V7A 28a8e2989ece6dc46df59b0768184028257f913843Evan Cheng }; 29a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 306d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov enum ARMFPEnum { 316d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov None, VFPv2, VFPv3, NEON 326d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov }; 336d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov 34d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov enum ThumbTypeEnum { 35d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov Thumb1, 36d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov Thumb2 37d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov }; 38d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov 396d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov /// ARMArchVersion - ARM architecture version: V4T (base), V5T, V5TE, 40d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov /// V6, V6T2, V7A. 41a8e2989ece6dc46df59b0768184028257f913843Evan Cheng ARMArchEnum ARMArchVersion; 42a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 436d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov /// ARMFPUType - Floating Point Unit type. 446d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov ARMFPEnum ARMFPUType; 45a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 461f0e404c87675ce75e34bcd91395c660fe1d4ac1David Goodwin /// UseNEONForSinglePrecisionFP - if the NEONFP attribute has been 471f0e404c87675ce75e34bcd91395c660fe1d4ac1David Goodwin /// specified. Use the method useNEONForSinglePrecisionFP() to 481f0e404c87675ce75e34bcd91395c660fe1d4ac1David Goodwin /// determine if NEON should actually be used. 4942a83f2d15cbbc08f5be19856198e3c885221e9cDavid Goodwin bool UseNEONForSinglePrecisionFP; 5042a83f2d15cbbc08f5be19856198e3c885221e9cDavid Goodwin 5170459bef9ccd73b3a2a44fdd62f2509861112745Anton Korobeynikov /// IsThumb - True if we are in thumb mode, false if in ARM mode. 5270459bef9ccd73b3a2a44fdd62f2509861112745Anton Korobeynikov bool IsThumb; 5370459bef9ccd73b3a2a44fdd62f2509861112745Anton Korobeynikov 5470459bef9ccd73b3a2a44fdd62f2509861112745Anton Korobeynikov /// ThumbMode - Indicates supported Thumb version. 55d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov ThumbTypeEnum ThumbMode; 56a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 57a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// IsR9Reserved - True if R9 is a not available as general purpose register. 58a8e2989ece6dc46df59b0768184028257f913843Evan Cheng bool IsR9Reserved; 593630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio 60a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// stackAlignment - The minimum alignment known to hold of the stack frame on 61a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// entry to the function and which must be maintained by every function. 62a8e2989ece6dc46df59b0768184028257f913843Evan Cheng unsigned stackAlignment; 63a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 6441a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov /// CPUString - String name of used CPU. 6541a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov std::string CPUString; 6641a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov 678557c2bcb8002169d890eb8485e9a1d7219e4343Evan Cheng /// Selected instruction itineraries (one entry per itinerary class.) 688557c2bcb8002169d890eb8485e9a1d7219e4343Evan Cheng InstrItineraryData InstrItins; 69764ab52dd80310a205c9888bf166d09dab858f90Jim Grosbach 70a8e2989ece6dc46df59b0768184028257f913843Evan Cheng public: 711a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng enum { 721a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng isELF, isDarwin 731a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng } TargetType; 741a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng 753630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio enum { 763630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio ARM_ABI_APCS, 773630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio ARM_ABI_AAPCS // ARM EABI 783630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio } TargetABI; 793630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio 80a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// This constructor initializes the data members to match that 813be03406c9c3b2075d5ae416499af2f15f703d6fDaniel Dunbar /// of the specified triple. 82a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// 833be03406c9c3b2075d5ae416499af2f15f703d6fDaniel Dunbar ARMSubtarget(const std::string &TT, const std::string &FS, bool isThumb); 84a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 85707e0184233f27e0e9f9aee0309f2daab8cfe7f8Dan Gohman /// getMaxInlineSizeThreshold - Returns the maximum memset / memcpy size 86707e0184233f27e0e9f9aee0309f2daab8cfe7f8Dan Gohman /// that still makes it profitable to inline the call. 87e0703c84ddeb1a1276de4e38210c1127ef5df130Rafael Espindola unsigned getMaxInlineSizeThreshold() const { 88e0703c84ddeb1a1276de4e38210c1127ef5df130Rafael Espindola // FIXME: For now, we don't lower memcpy's to loads / stores for Thumb. 89e0703c84ddeb1a1276de4e38210c1127ef5df130Rafael Espindola // Change this once Thumb ldmia / stmia support is added. 90e0703c84ddeb1a1276de4e38210c1127ef5df130Rafael Espindola return isThumb() ? 0 : 64; 91e0703c84ddeb1a1276de4e38210c1127ef5df130Rafael Espindola } 926d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov /// ParseSubtargetFeatures - Parses features string setting specified 93a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// subtarget options. Definition of function is auto generated by tblgen. 9441a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov std::string ParseSubtargetFeatures(const std::string &FS, 9541a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov const std::string &CPU); 96a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 976d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasV4TOps() const { return ARMArchVersion >= V4T; } 986d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasV5TOps() const { return ARMArchVersion >= V5T; } 99a8e2989ece6dc46df59b0768184028257f913843Evan Cheng bool hasV5TEOps() const { return ARMArchVersion >= V5TE; } 1006d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasV6Ops() const { return ARMArchVersion >= V6; } 101e481f127497b20d3abe625ca4c086f85bf8b126fBob Wilson bool hasV6T2Ops() const { return ARMArchVersion >= V6T2; } 1026d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasV7Ops() const { return ARMArchVersion >= V7A; } 103a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 1046d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasVFP2() const { return ARMFPUType >= VFPv2; } 1056d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasVFP3() const { return ARMFPUType >= VFPv3; } 1066d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasNEON() const { return ARMFPUType >= NEON; } 107764ab52dd80310a205c9888bf166d09dab858f90Jim Grosbach bool useNEONForSinglePrecisionFP() const { 10842a83f2d15cbbc08f5be19856198e3c885221e9cDavid Goodwin return hasNEON() && UseNEONForSinglePrecisionFP; } 109764ab52dd80310a205c9888bf166d09dab858f90Jim Grosbach 1101a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng bool isTargetDarwin() const { return TargetType == isDarwin; } 1111a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng bool isTargetELF() const { return TargetType == isELF; } 1121a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng 1133630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio bool isAPCS_ABI() const { return TargetABI == ARM_ABI_APCS; } 1143630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio bool isAAPCS_ABI() const { return TargetABI == ARM_ABI_AAPCS; } 1153630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio 11670459bef9ccd73b3a2a44fdd62f2509861112745Anton Korobeynikov bool isThumb() const { return IsThumb; } 117bb6296234238aab74a531b382d92342269bea902Anton Korobeynikov bool isThumb1Only() const { return IsThumb && (ThumbMode == Thumb1); } 1183147fb2cff9ca0d258f8ab20ff23b9c447024df1Evan Cheng bool isThumb2() const { return IsThumb && (ThumbMode == Thumb2); } 119d770d9e7d1f5c65b185897dcf226b3fc64598683Evan Cheng bool hasThumb2() const { return ThumbMode >= Thumb2; } 120a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 121a8e2989ece6dc46df59b0768184028257f913843Evan Cheng bool isR9Reserved() const { return IsR9Reserved; } 122a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 12341a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov const std::string & getCPUString() const { return CPUString; } 12441a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov 125764ab52dd80310a205c9888bf166d09dab858f90Jim Grosbach /// getInstrItins - Return the instruction itineraies based on subtarget 1268557c2bcb8002169d890eb8485e9a1d7219e4343Evan Cheng /// selection. 1278557c2bcb8002169d890eb8485e9a1d7219e4343Evan Cheng const InstrItineraryData &getInstrItineraryData() const { return InstrItins; } 1288557c2bcb8002169d890eb8485e9a1d7219e4343Evan Cheng 129a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// getStackAlignment - Returns the minimum alignment known to hold of the 130a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// stack frame on entry to the function and which must be maintained by every 131a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// function for this subtarget. 132a8e2989ece6dc46df59b0768184028257f913843Evan Cheng unsigned getStackAlignment() const { return stackAlignment; } 133e4e4ed3b56f63e9343e01bf0b2ecd7c1f45d296cEvan Cheng 134e4e4ed3b56f63e9343e01bf0b2ecd7c1f45d296cEvan Cheng /// GVIsIndirectSymbol - true if the GV will be accessed via an indirect 135e4e4ed3b56f63e9343e01bf0b2ecd7c1f45d296cEvan Cheng /// symbol. 136e4e4ed3b56f63e9343e01bf0b2ecd7c1f45d296cEvan Cheng bool GVIsIndirectSymbol(GlobalValue *GV, bool isStatic) const; 137a8e2989ece6dc46df59b0768184028257f913843Evan Cheng}; 138a8e2989ece6dc46df59b0768184028257f913843Evan Cheng} // End llvm namespace 139a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 140a8e2989ece6dc46df59b0768184028257f913843Evan Cheng#endif // ARMSUBTARGET_H 141