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//==- MSP430CallingConv.td - Calling Conventions for MSP430 -*- tablegen -*-==//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// This describes the calling conventions for MSP430 architecture.
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
// MSP430 Return Value Calling Convention
//===----------------------------------------------------------------------===//
def RetCC_MSP430 : CallingConv<[
// i8 are returned in registers R12B, R13B, R14B, R15B
CCIfType<[i8], CCAssignToReg<[R12B, R13B, R14B, R15B]>>,
// i16 are returned in registers R12, R13, R14, R15
CCIfType<[i16], CCAssignToReg<[R12, R13, R14, R15]>>
]>;
//===----------------------------------------------------------------------===//
// MSP430 Argument Calling Conventions
//===----------------------------------------------------------------------===//
def CC_MSP430_AssignStack : CallingConv<[
// Pass by value if the byval attribute is given
CCIfByVal<CCPassByVal<2, 2>>,
// Promote i8 arguments to i16.
CCIfType<[i8], CCPromoteToType<i16>>,
// 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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