1 //==- MSP430CallingConv.td - Calling Conventions for MSP430 -*- tablegen -*-==//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
9 // This describes the calling conventions for MSP430 architecture.
10 //===----------------------------------------------------------------------===//
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]>>,
19 // i16 are returned in registers R15, R14, R13, R12
20 CCIfType<[i16], CCAssignToReg<[R15W, R14W, R13W, R12W]>>
23 //===----------------------------------------------------------------------===//
24 // MSP430 Argument Calling Conventions
25 //===----------------------------------------------------------------------===//
26 def CC_MSP430 : CallingConv<[
27 // Promote i8 arguments to i16.
28 CCIfType<[i8], CCPromoteToType<i16>>,
30 // The first 4 integer arguments of non-varargs functions are passed in
32 CCIfNotVarArg<CCIfType<[i16], CCAssignToReg<[R15W, R14W, R13W, R12W]>>>,
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>>