1 //=== CSKYCallingConv.h - CSKY Custom Calling Convention Routines -*-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 // This file contains the custom routines for the CSKY Calling Convention that 10 // aren't done by tablegen. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_LIB_TARGET_CSKY_CSKYCALLINGCONV_H 15 #define LLVM_LIB_TARGET_CSKY_CSKYCALLINGCONV_H 16 17 #include "CSKY.h" 18 #include "CSKYSubtarget.h" 19 #include "llvm/CodeGen/CallingConvLower.h" 20 #include "llvm/CodeGen/TargetInstrInfo.h" 21 #include "llvm/IR/CallingConv.h" 22 23 namespace llvm { 24 25 static bool CC_CSKY_ABIV2_SOFT_64(unsigned &ValNo, MVT &ValVT, MVT &LocVT, 26 CCValAssign::LocInfo &LocInfo, 27 ISD::ArgFlagsTy &ArgFlags, CCState &State) { 28 29 static const MCPhysReg ArgGPRs[] = {CSKY::R0, CSKY::R1, CSKY::R2, CSKY::R3}; 30 Register Reg = State.AllocateReg(ArgGPRs); 31 LocVT = MVT::i32; 32 if (!Reg) { 33 unsigned StackOffset = State.AllocateStack(8, Align(4)); 34 State.addLoc( 35 CCValAssign::getMem(ValNo, ValVT, StackOffset, LocVT, LocInfo)); 36 return true; 37 } 38 if (!State.AllocateReg(ArgGPRs)) 39 State.AllocateStack(4, Align(4)); 40 State.addLoc(CCValAssign::getReg(ValNo, ValVT, Reg, LocVT, LocInfo)); 41 return true; 42 } 43 44 static bool Ret_CSKY_ABIV2_SOFT_64(unsigned &ValNo, MVT &ValVT, MVT &LocVT, 45 CCValAssign::LocInfo &LocInfo, 46 ISD::ArgFlagsTy &ArgFlags, CCState &State) { 47 48 static const MCPhysReg ArgGPRs[] = {CSKY::R0, CSKY::R1}; 49 Register Reg = State.AllocateReg(ArgGPRs); 50 LocVT = MVT::i32; 51 if (!Reg) 52 return false; 53 54 if (!State.AllocateReg(ArgGPRs)) 55 return false; 56 57 State.addLoc(CCValAssign::getReg(ValNo, ValVT, Reg, LocVT, LocInfo)); 58 return true; 59 } 60 61 } // namespace llvm 62 63 #endif 64