| //==- MSP430CallingConv.td - Calling Conventions for MSP430 -*- tablegen -*-==// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // This describes the calling conventions for MSP430 architecture. |
| //===----------------------------------------------------------------------===// |
| |
| //===----------------------------------------------------------------------===// |
| // MSP430 Return Value Calling Convention |
| //===----------------------------------------------------------------------===// |
| def RetCC_MSP430 : CallingConv<[ |
| // i8 are returned in registers R15B, R14B, R13B, R12B |
| CCIfType<[i8], CCAssignToReg<[R15B, R14B, R13B, R12B]>>, |
| |
| // i16 are returned in registers R15, R14, R13, R12 |
| CCIfType<[i16], CCAssignToReg<[R15W, R14W, R13W, R12W]>> |
| ]>; |
| |
| //===----------------------------------------------------------------------===// |
| // MSP430 Argument Calling Conventions |
| //===----------------------------------------------------------------------===// |
| def CC_MSP430 : CallingConv<[ |
| // Pass by value if the byval attribute is given |
| CCIfByVal<CCPassByVal<2, 2>>, |
| |
| // Promote i8 arguments to i16. |
| CCIfType<[i8], CCPromoteToType<i16>>, |
| |
| // The first 4 integer arguments of non-varargs functions are passed in |
| // integer registers. |
| CCIfNotVarArg<CCIfType<[i16], CCAssignToReg<[R15W, R14W, R13W, R12W]>>>, |
| |
| // Integer values get stored in stack slots that are 2 bytes in |
| // size and 2-byte aligned. |
| CCIfType<[i16], CCAssignToStack<2, 2>> |
| ]>; |
