1 //===-- ARMWinEH.cpp - Windows on ARM EH Support Functions ------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "llvm/Support/ARMWinEH.h" 11 #include "llvm/Support/raw_ostream.h" 12 13 namespace llvm { 14 namespace ARM { 15 namespace WinEH { 16 std::pair<uint16_t, uint32_t> SavedRegisterMask(const RuntimeFunction &RF) { 17 uint8_t NumRegisters = RF.Reg(); 18 uint8_t RegistersVFP = RF.R(); 19 uint8_t LinkRegister = RF.L(); 20 uint8_t ChainedFrame = RF.C(); 21 22 uint16_t GPRMask = (ChainedFrame << 11) | (LinkRegister << 14); 23 uint32_t VFPMask = 0; 24 25 if (RegistersVFP) 26 VFPMask |= (((1 << ((NumRegisters + 1) % 8)) - 1) << 8); 27 else 28 GPRMask |= (((1 << (NumRegisters + 1)) - 1) << 4); 29 30 if (PrologueFolding(RF)) 31 GPRMask |= (((1 << (NumRegisters + 1)) - 1) << (~RF.StackAdjust() & 0x3)); 32 33 return std::make_pair(GPRMask, VFPMask); 34 } 35 } 36 } 37 } 38 39
