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 #include "llvm/Support/raw_ostream.h" 11 12 namespace llvm { 13 namespace ARM { 14 namespace WinEH { 15 std::pair<uint16_t, uint32_t> SavedRegisterMask(const RuntimeFunction &RF) { 16 uint8_t NumRegisters = RF.Reg(); 17 uint8_t RegistersVFP = RF.R(); 18 uint8_t LinkRegister = RF.L(); 19 uint8_t ChainedFrame = RF.C(); 20 21 uint16_t GPRMask = (ChainedFrame << 11) | (LinkRegister << 14); 22 uint32_t VFPMask = 0; 23 24 if (RegistersVFP) 25 VFPMask |= (((1 << ((NumRegisters + 1) % 8)) - 1) << 8); 26 else 27 GPRMask |= (((1 << (NumRegisters + 1)) - 1) << 4); 28 29 if (PrologueFolding(RF)) 30 GPRMask |= (((1 << (NumRegisters + 1)) - 1) << (~RF.StackAdjust() & 0x3)); 31 32 return std::make_pair(GPRMask, VFPMask); 33 } 34 } 35 } 36 } 37 38