1 //===-- ARMWinEH.cpp - Windows on ARM EH Support Functions ------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "llvm/Support/ARMWinEH.h" 10 11 namespace llvm { 12 namespace ARM { 13 namespace WinEH { 14 std::pair<uint16_t, uint32_t> SavedRegisterMask(const RuntimeFunction &RF) { 15 uint8_t NumRegisters = RF.Reg(); 16 uint8_t RegistersVFP = RF.R(); 17 uint8_t LinkRegister = RF.L(); 18 uint8_t ChainedFrame = RF.C(); 19 20 uint16_t GPRMask = (ChainedFrame << 11) | (LinkRegister << 14); 21 uint32_t VFPMask = 0; 22 23 if (RegistersVFP) 24 VFPMask |= (((1 << ((NumRegisters + 1) % 8)) - 1) << 8); 25 else 26 GPRMask |= (((1 << (NumRegisters + 1)) - 1) << 4); 27 28 if (PrologueFolding(RF)) 29 GPRMask |= (((1 << (NumRegisters + 1)) - 1) << (~RF.StackAdjust() & 0x3)); 30 31 return std::make_pair(GPRMask, VFPMask); 32 } 33 } // namespace WinEH 34 } // namespace ARM 35 } // namespace llvm 36 37