ARMSubtarget.h revision 42a83f2d15cbbc08f5be19856198e3c885221e9c
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 { 22a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 23a8e2989ece6dc46df59b0768184028257f913843Evan Chengclass ARMSubtarget : public TargetSubtarget { 24a8e2989ece6dc46df59b0768184028257f913843Evan Chengprotected: 25a8e2989ece6dc46df59b0768184028257f913843Evan Cheng enum ARMArchEnum { 26fbbf1eeccf0cf469f0d8962b1341c8ba22a9dadbAnton Korobeynikov V4T, V5T, V5TE, V6, V6T2, V7A 27a8e2989ece6dc46df59b0768184028257f913843Evan Cheng }; 28a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 296d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov enum ARMFPEnum { 306d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov None, VFPv2, VFPv3, NEON 316d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov }; 326d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov 33d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov enum ThumbTypeEnum { 34d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov Thumb1, 35d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov Thumb2 36d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov }; 37d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov 386d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov /// ARMArchVersion - ARM architecture version: V4T (base), V5T, V5TE, 39d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov /// V6, V6T2, V7A. 40a8e2989ece6dc46df59b0768184028257f913843Evan Cheng ARMArchEnum ARMArchVersion; 41a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 426d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov /// ARMFPUType - Floating Point Unit type. 436d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov ARMFPEnum ARMFPUType; 44a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 4542a83f2d15cbbc08f5be19856198e3c885221e9cDavid Goodwin /// UseNEONForSinglePrecisionFP - if NEON is available use for FP 4642a83f2d15cbbc08f5be19856198e3c885221e9cDavid Goodwin bool UseNEONForSinglePrecisionFP; 4742a83f2d15cbbc08f5be19856198e3c885221e9cDavid Goodwin 4870459bef9ccd73b3a2a44fdd62f2509861112745Anton Korobeynikov /// IsThumb - True if we are in thumb mode, false if in ARM mode. 4970459bef9ccd73b3a2a44fdd62f2509861112745Anton Korobeynikov bool IsThumb; 5070459bef9ccd73b3a2a44fdd62f2509861112745Anton Korobeynikov 5170459bef9ccd73b3a2a44fdd62f2509861112745Anton Korobeynikov /// ThumbMode - Indicates supported Thumb version. 52d4022c3fbb0705abdc8eddc3ee4a5059f5ef8094Anton Korobeynikov ThumbTypeEnum ThumbMode; 53a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 54a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// IsR9Reserved - True if R9 is a not available as general purpose register. 55a8e2989ece6dc46df59b0768184028257f913843Evan Cheng bool IsR9Reserved; 563630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio 57a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// stackAlignment - The minimum alignment known to hold of the stack frame on 58a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// entry to the function and which must be maintained by every function. 59a8e2989ece6dc46df59b0768184028257f913843Evan Cheng unsigned stackAlignment; 60a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 6141a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov /// CPUString - String name of used CPU. 6241a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov std::string CPUString; 6341a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov 648557c2bcb8002169d890eb8485e9a1d7219e4343Evan Cheng /// Selected instruction itineraries (one entry per itinerary class.) 658557c2bcb8002169d890eb8485e9a1d7219e4343Evan Cheng InstrItineraryData InstrItins; 668557c2bcb8002169d890eb8485e9a1d7219e4343Evan Cheng 67a8e2989ece6dc46df59b0768184028257f913843Evan Cheng public: 681a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng enum { 691a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng isELF, isDarwin 701a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng } TargetType; 711a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng 723630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio enum { 733630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio ARM_ABI_APCS, 743630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio ARM_ABI_AAPCS // ARM EABI 753630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio } TargetABI; 763630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio 77a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// This constructor initializes the data members to match that 783be03406c9c3b2075d5ae416499af2f15f703d6fDaniel Dunbar /// of the specified triple. 79a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// 803be03406c9c3b2075d5ae416499af2f15f703d6fDaniel Dunbar ARMSubtarget(const std::string &TT, const std::string &FS, bool isThumb); 81a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 82707e0184233f27e0e9f9aee0309f2daab8cfe7f8Dan Gohman /// getMaxInlineSizeThreshold - Returns the maximum memset / memcpy size 83707e0184233f27e0e9f9aee0309f2daab8cfe7f8Dan Gohman /// that still makes it profitable to inline the call. 84e0703c84ddeb1a1276de4e38210c1127ef5df130Rafael Espindola unsigned getMaxInlineSizeThreshold() const { 85e0703c84ddeb1a1276de4e38210c1127ef5df130Rafael Espindola // FIXME: For now, we don't lower memcpy's to loads / stores for Thumb. 86e0703c84ddeb1a1276de4e38210c1127ef5df130Rafael Espindola // Change this once Thumb ldmia / stmia support is added. 87e0703c84ddeb1a1276de4e38210c1127ef5df130Rafael Espindola return isThumb() ? 0 : 64; 88e0703c84ddeb1a1276de4e38210c1127ef5df130Rafael Espindola } 896d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov /// ParseSubtargetFeatures - Parses features string setting specified 90a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// subtarget options. Definition of function is auto generated by tblgen. 9141a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov std::string ParseSubtargetFeatures(const std::string &FS, 9241a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov const std::string &CPU); 93a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 946d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasV4TOps() const { return ARMArchVersion >= V4T; } 956d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasV5TOps() const { return ARMArchVersion >= V5T; } 96a8e2989ece6dc46df59b0768184028257f913843Evan Cheng bool hasV5TEOps() const { return ARMArchVersion >= V5TE; } 976d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasV6Ops() const { return ARMArchVersion >= V6; } 98e481f127497b20d3abe625ca4c086f85bf8b126fBob Wilson bool hasV6T2Ops() const { return ARMArchVersion >= V6T2; } 996d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasV7Ops() const { return ARMArchVersion >= V7A; } 100a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 1016d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasVFP2() const { return ARMFPUType >= VFPv2; } 1026d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasVFP3() const { return ARMFPUType >= VFPv3; } 1036d7d2aa38a247426e2ccf53e3c6ad0315c9a4d8cAnton Korobeynikov bool hasNEON() const { return ARMFPUType >= NEON; } 10442a83f2d15cbbc08f5be19856198e3c885221e9cDavid Goodwin bool useNEONForSinglePrecisionFP() const { 10542a83f2d15cbbc08f5be19856198e3c885221e9cDavid Goodwin return hasNEON() && UseNEONForSinglePrecisionFP; } 10642a83f2d15cbbc08f5be19856198e3c885221e9cDavid Goodwin 1071a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng bool isTargetDarwin() const { return TargetType == isDarwin; } 1081a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng bool isTargetELF() const { return TargetType == isELF; } 1091a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng 1103630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio bool isAPCS_ABI() const { return TargetABI == ARM_ABI_APCS; } 1113630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio bool isAAPCS_ABI() const { return TargetABI == ARM_ABI_AAPCS; } 1123630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio 11370459bef9ccd73b3a2a44fdd62f2509861112745Anton Korobeynikov bool isThumb() const { return IsThumb; } 114bb6296234238aab74a531b382d92342269bea902Anton Korobeynikov bool isThumb1Only() const { return IsThumb && (ThumbMode == Thumb1); } 1153147fb2cff9ca0d258f8ab20ff23b9c447024df1Evan Cheng bool isThumb2() const { return IsThumb && (ThumbMode == Thumb2); } 116d770d9e7d1f5c65b185897dcf226b3fc64598683Evan Cheng bool hasThumb2() const { return ThumbMode >= Thumb2; } 117a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 118a8e2989ece6dc46df59b0768184028257f913843Evan Cheng bool isR9Reserved() const { return IsR9Reserved; } 119a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 12041a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov const std::string & getCPUString() const { return CPUString; } 12141a024385f1220eadc48b48cb4c044a5fbc1b361Anton Korobeynikov 1228557c2bcb8002169d890eb8485e9a1d7219e4343Evan Cheng /// getInstrItins - Return the instruction itineraies based on subtarget 1238557c2bcb8002169d890eb8485e9a1d7219e4343Evan Cheng /// selection. 1248557c2bcb8002169d890eb8485e9a1d7219e4343Evan Cheng const InstrItineraryData &getInstrItineraryData() const { return InstrItins; } 1258557c2bcb8002169d890eb8485e9a1d7219e4343Evan Cheng 126a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// getStackAlignment - Returns the minimum alignment known to hold of the 127a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// stack frame on entry to the function and which must be maintained by every 128a8e2989ece6dc46df59b0768184028257f913843Evan Cheng /// function for this subtarget. 129a8e2989ece6dc46df59b0768184028257f913843Evan Cheng unsigned getStackAlignment() const { return stackAlignment; } 130a8e2989ece6dc46df59b0768184028257f913843Evan Cheng}; 131a8e2989ece6dc46df59b0768184028257f913843Evan Cheng} // End llvm namespace 132a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 133a8e2989ece6dc46df59b0768184028257f913843Evan Cheng#endif // ARMSUBTARGET_H 134