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 //===----------------------------------------------------------------------===// 15 def 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<[R15, R14, R13, R12]>> 21 ]>; 22 23 //===----------------------------------------------------------------------===// 24 // MSP430 Argument Calling Conventions 25 //===----------------------------------------------------------------------===// 26 def CC_MSP430_AssignStack : CallingConv<[ 27 // Pass by value if the byval attribute is given 28 CCIfByVal<CCPassByVal<2, 2>>, 29 30 // Promote i8 arguments to i16. 31 CCIfType<[i8], CCPromoteToType<i16>>, 32 33 // Integer values get stored in stack slots that are 2 bytes in 34 // size and 2-byte aligned. 35 CCIfType<[i16], CCAssignToStack<2, 2>> 36 ]>; 37 38
