1fe6060f1SDimitry Andric //===-- M68kCallingConv.h - M68k Custom CC Routines ---------*- C++ -*-===// 2fe6060f1SDimitry Andric // 3fe6060f1SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4fe6060f1SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5fe6060f1SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6fe6060f1SDimitry Andric // 7fe6060f1SDimitry Andric //===----------------------------------------------------------------------===// 8fe6060f1SDimitry Andric /// 9fe6060f1SDimitry Andric /// \file 10fe6060f1SDimitry Andric /// This file contains the custom routines for the M68k Calling Convention 11fe6060f1SDimitry Andric /// that aren't done by tablegen. 12fe6060f1SDimitry Andric /// 13fe6060f1SDimitry Andric //===----------------------------------------------------------------------===// 14fe6060f1SDimitry Andric 15fe6060f1SDimitry Andric #ifndef LLVM_LIB_TARGET_M68K_M68KCALLINGCONV_H 16fe6060f1SDimitry Andric #define LLVM_LIB_TARGET_M68K_M68KCALLINGCONV_H 17fe6060f1SDimitry Andric 18fe6060f1SDimitry Andric #include "MCTargetDesc/M68kMCTargetDesc.h" 19fe6060f1SDimitry Andric 20fe6060f1SDimitry Andric #include "llvm/CodeGen/CallingConvLower.h" 21fe6060f1SDimitry Andric #include "llvm/IR/CallingConv.h" 22fe6060f1SDimitry Andric #include "llvm/IR/Function.h" 23fe6060f1SDimitry Andric 24fe6060f1SDimitry Andric namespace llvm { 25fe6060f1SDimitry Andric 26fe6060f1SDimitry Andric /// Custom state to propagate llvm type info to register CC assigner 27*349cc55cSDimitry Andric struct M68kCCState : public CCState { 28*349cc55cSDimitry Andric ArrayRef<Type *> ArgTypeList; 29fe6060f1SDimitry Andric 30*349cc55cSDimitry Andric M68kCCState(ArrayRef<Type *> ArgTypes, CallingConv::ID CC, bool IsVarArg, 31fe6060f1SDimitry Andric MachineFunction &MF, SmallVectorImpl<CCValAssign> &Locs, 32fe6060f1SDimitry Andric LLVMContext &C) 33*349cc55cSDimitry Andric : CCState(CC, IsVarArg, MF, Locs, C), ArgTypeList(ArgTypes) {} 34fe6060f1SDimitry Andric }; 35fe6060f1SDimitry Andric 36fe6060f1SDimitry Andric /// NOTE this function is used to select registers for formal arguments and call 37fe6060f1SDimitry Andric /// FIXME: Handling on pointer arguments is not complete 38fe6060f1SDimitry Andric inline bool CC_M68k_Any_AssignToReg(unsigned &ValNo, MVT &ValVT, MVT &LocVT, 39fe6060f1SDimitry Andric CCValAssign::LocInfo &LocInfo, 40fe6060f1SDimitry Andric ISD::ArgFlagsTy &ArgFlags, CCState &State) { 41*349cc55cSDimitry Andric const M68kCCState &CCInfo = static_cast<M68kCCState &>(State); 42fe6060f1SDimitry Andric 43fe6060f1SDimitry Andric static const MCPhysReg DataRegList[] = {M68k::D0, M68k::D1, M68k::A0, 44fe6060f1SDimitry Andric M68k::A1}; 45fe6060f1SDimitry Andric 46fe6060f1SDimitry Andric // Address registers have %a register priority 47fe6060f1SDimitry Andric static const MCPhysReg AddrRegList[] = { 48fe6060f1SDimitry Andric M68k::A0, 49fe6060f1SDimitry Andric M68k::A1, 50fe6060f1SDimitry Andric M68k::D0, 51fe6060f1SDimitry Andric M68k::D1, 52fe6060f1SDimitry Andric }; 53fe6060f1SDimitry Andric 54*349cc55cSDimitry Andric const auto &ArgTypes = CCInfo.ArgTypeList; 55*349cc55cSDimitry Andric auto I = ArgTypes.begin(), End = ArgTypes.end(); 56fe6060f1SDimitry Andric int No = ValNo; 57*349cc55cSDimitry Andric while (No > 0 && I != End) { 58*349cc55cSDimitry Andric No -= (*I)->isIntegerTy(64) ? 2 : 1; 59*349cc55cSDimitry Andric ++I; 60fe6060f1SDimitry Andric } 61fe6060f1SDimitry Andric 62*349cc55cSDimitry Andric bool IsPtr = I != End && (*I)->isPointerTy(); 63fe6060f1SDimitry Andric 64fe6060f1SDimitry Andric unsigned Reg = 65fe6060f1SDimitry Andric IsPtr ? State.AllocateReg(AddrRegList) : State.AllocateReg(DataRegList); 66fe6060f1SDimitry Andric 67fe6060f1SDimitry Andric if (Reg) { 68fe6060f1SDimitry Andric State.addLoc(CCValAssign::getReg(ValNo, ValVT, Reg, LocVT, LocInfo)); 69fe6060f1SDimitry Andric return true; 70fe6060f1SDimitry Andric } 71fe6060f1SDimitry Andric 72fe6060f1SDimitry Andric return false; 73fe6060f1SDimitry Andric } 74fe6060f1SDimitry Andric 75fe6060f1SDimitry Andric } // namespace llvm 76fe6060f1SDimitry Andric 77fe6060f1SDimitry Andric #endif 78