1 //==- MSP430CallingConv.td - Calling Conventions for MSP430 -*- tablegen -*-==//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
8 // This describes the calling conventions for MSP430 architecture.
9 //===----------------------------------------------------------------------===//
11 //===----------------------------------------------------------------------===//
12 // MSP430 Return Value Calling Convention
13 //===----------------------------------------------------------------------===//
14 def RetCC_MSP430 : CallingConv<[
15 // i8 are returned in registers R12B, R13B, R14B, R15B
16 CCIfType<[i8], CCAssignToReg<[R12B, R13B, R14B, R15B]>>,
18 // i16 are returned in registers R12, R13, R14, R15
19 CCIfType<[i16], CCAssignToReg<[R12, R13, R14, R15]>>
22 //===----------------------------------------------------------------------===//
23 // MSP430 Argument Calling Conventions
24 //===----------------------------------------------------------------------===//
25 def CC_MSP430_AssignStack : CallingConv<[
26 // Pass by value if the byval attribute is given
27 CCIfByVal<CCPassByVal<2, 2>>,
29 // Promote i8 arguments to i16.
30 CCIfType<[i8], CCPromoteToType<i16>>,
32 // Integer values get stored in stack slots that are 2 bytes in
33 // size and 2-byte aligned.
34 CCIfType<[i16], CCAssignToStack<2, 2>>