| //==- 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>> |
| ]>; |
| |
