ARMSubtarget.cpp revision 4b1747430a2d67702958b95d6776396734f184a0
1a8e2989ece6dc46df59b0768184028257f913843Evan Cheng//===-- ARMSubtarget.cpp - ARM Subtarget Information ------------*- 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 implements the ARM specific subclass of TargetSubtarget. 11a8e2989ece6dc46df59b0768184028257f913843Evan Cheng// 12a8e2989ece6dc46df59b0768184028257f913843Evan Cheng//===----------------------------------------------------------------------===// 13a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 14a8e2989ece6dc46df59b0768184028257f913843Evan Cheng#include "ARMSubtarget.h" 15a8e2989ece6dc46df59b0768184028257f913843Evan Cheng#include "ARMGenSubtarget.inc" 16a8e2989ece6dc46df59b0768184028257f913843Evan Cheng#include "llvm/Module.h" 17a8e2989ece6dc46df59b0768184028257f913843Evan Chengusing namespace llvm; 18a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 1904321f70f5075673934d5b1ed3353dd15d911183Evan ChengARMSubtarget::ARMSubtarget(const Module &M, const std::string &FS, bool thumb) 201a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng : ARMArchVersion(V4T) 211a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng , HasVFP2(false) 2204321f70f5075673934d5b1ed3353dd15d911183Evan Cheng , IsThumb(thumb) 231a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng , UseThumbBacktraces(false) 241a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng , IsR9Reserved(false) 253630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio , stackAlignment(4) 263630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio , TargetType(isELF) // Default to ELF unless otherwise specified. 273630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio , TargetABI(ARM_ABI_APCS) { 28a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 29a8e2989ece6dc46df59b0768184028257f913843Evan Cheng // Determine default and user specified characteristics 30a8e2989ece6dc46df59b0768184028257f913843Evan Cheng std::string CPU = "generic"; 31a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 32a8e2989ece6dc46df59b0768184028257f913843Evan Cheng // Parse features string. 33a8e2989ece6dc46df59b0768184028257f913843Evan Cheng ParseSubtargetFeatures(FS, CPU); 34a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 35a8e2989ece6dc46df59b0768184028257f913843Evan Cheng // Set the boolean corresponding to the current target triple, or the default 36a8e2989ece6dc46df59b0768184028257f913843Evan Cheng // if one cannot be determined, to true. 37a8e2989ece6dc46df59b0768184028257f913843Evan Cheng const std::string& TT = M.getTargetTriple(); 384b1747430a2d67702958b95d6776396734f184a0Evan Cheng unsigned Len = TT.length(); 394b1747430a2d67702958b95d6776396734f184a0Evan Cheng if (Len >= 5) { 404b1747430a2d67702958b95d6776396734f184a0Evan Cheng if (TT.substr(0, 4) == "armv") { 414b1747430a2d67702958b95d6776396734f184a0Evan Cheng unsigned SubVer = TT[4]; 424b1747430a2d67702958b95d6776396734f184a0Evan Cheng if (SubVer > '4' && SubVer <= '9') { 434b1747430a2d67702958b95d6776396734f184a0Evan Cheng if (SubVer >= '6') 444b1747430a2d67702958b95d6776396734f184a0Evan Cheng ARMArchVersion = V6; 454b1747430a2d67702958b95d6776396734f184a0Evan Cheng else if (SubVer == '5') { 464b1747430a2d67702958b95d6776396734f184a0Evan Cheng ARMArchVersion = V5T; 474b1747430a2d67702958b95d6776396734f184a0Evan Cheng if (Len >= 7 && TT[5] == 't' && TT[6] == 'e') 484b1747430a2d67702958b95d6776396734f184a0Evan Cheng ARMArchVersion = V5TE; 494b1747430a2d67702958b95d6776396734f184a0Evan Cheng } 504b1747430a2d67702958b95d6776396734f184a0Evan Cheng } 514b1747430a2d67702958b95d6776396734f184a0Evan Cheng } 524b1747430a2d67702958b95d6776396734f184a0Evan Cheng } 534b1747430a2d67702958b95d6776396734f184a0Evan Cheng 544b1747430a2d67702958b95d6776396734f184a0Evan Cheng if (Len > 5) { 551a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng if (TT.find("-darwin") != std::string::npos) 561a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng TargetType = isDarwin; 57a8e2989ece6dc46df59b0768184028257f913843Evan Cheng } else if (TT.empty()) { 58a8e2989ece6dc46df59b0768184028257f913843Evan Cheng#if defined(__APPLE__) 591a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng TargetType = isDarwin; 60a8e2989ece6dc46df59b0768184028257f913843Evan Cheng#endif 61a8e2989ece6dc46df59b0768184028257f913843Evan Cheng } 62a8e2989ece6dc46df59b0768184028257f913843Evan Cheng 633630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio if (TT.find("eabi") != std::string::npos) 643630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio TargetABI = ARM_ABI_AAPCS; 653630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio 663630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio if (isAAPCS_ABI()) 673630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio stackAlignment = 8; 683630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio 691a3771e30e48b9cc21ccdc79fc9cf37ec4104b17Evan Cheng if (isTargetDarwin()) { 70a8e2989ece6dc46df59b0768184028257f913843Evan Cheng UseThumbBacktraces = true; 71a8e2989ece6dc46df59b0768184028257f913843Evan Cheng IsR9Reserved = true; 723630e78db9268dbe81a9369a33e49b857804f2ecLauro Ramos Venancio } 73a8e2989ece6dc46df59b0768184028257f913843Evan Cheng} 74