1//==- MSP430CallingConv.td - Calling Conventions for MSP430 -*- tablegen -*-==// 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// This describes the calling conventions for MSP430 architecture. 9//===----------------------------------------------------------------------===// 10 11//===----------------------------------------------------------------------===// 12// MSP430 Return Value Calling Convention 13//===----------------------------------------------------------------------===// 14def RetCC_MSP430 : CallingConv<[ 15 // i8 are returned in registers R12B, R13B, R14B, R15B 16 CCIfType<[i8], CCAssignToReg<[R12B, R13B, R14B, R15B]>>, 17 18 // i16 are returned in registers R12, R13, R14, R15 19 CCIfType<[i16], CCAssignToReg<[R12, R13, R14, R15]>> 20]>; 21 22//===----------------------------------------------------------------------===// 23// MSP430 Argument Calling Conventions 24//===----------------------------------------------------------------------===// 25def CC_MSP430_AssignStack : CallingConv<[ 26 // Pass by value if the byval attribute is given 27 CCIfByVal<CCPassByVal<2, 2>>, 28 29 // Promote i8 arguments to i16. 30 CCIfType<[i8], CCPromoteToType<i16>>, 31 32 // Integer values get stored in stack slots that are 2 bytes in 33 // size and 2-byte aligned. 34 CCIfType<[i16], CCAssignToStack<2, 2>> 35]>; 36 37