1//==- MSP430CallingConv.td - Calling Conventions for MSP430 -*- tablegen -*-==// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// This describes the calling conventions for MSP430 architecture. 10//===----------------------------------------------------------------------===// 11 12//===----------------------------------------------------------------------===// 13// MSP430 Return Value Calling Convention 14//===----------------------------------------------------------------------===// 15def RetCC_MSP430 : CallingConv<[ 16 // i8 are returned in registers R15B, R14B, R13B, R12B 17 CCIfType<[i8], CCAssignToReg<[R15B, R14B, R13B, R12B]>>, 18 19 // i16 are returned in registers R15, R14, R13, R12 20 CCIfType<[i16], CCAssignToReg<[R15W, R14W, R13W, R12W]>> 21]>; 22 23//===----------------------------------------------------------------------===// 24// MSP430 Argument Calling Conventions 25//===----------------------------------------------------------------------===// 26def CC_MSP430 : CallingConv<[ 27 // Promote i8 arguments to i16. 28 CCIfType<[i8], CCPromoteToType<i16>>, 29 30 // The first 4 integer arguments of non-varargs functions are passed in 31 // integer registers. 32 CCIfNotVarArg<CCIfType<[i16], CCAssignToReg<[R15W, R14W, R13W, R12W]>>>, 33 34 // Integer values get stored in stack slots that are 2 bytes in 35 // size and 2-byte aligned. 36 CCIfType<[i16], CCAssignToStack<2, 2>> 37]>; 38