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//==- 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<[
// 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>>
]>;
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