1 //===- XCoreCallingConv.td - Calling Conventions for XCore -*- 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 XCore architecture.
9 //===----------------------------------------------------------------------===//
11 //===----------------------------------------------------------------------===//
12 // XCore Return Value Calling Convention
13 //===----------------------------------------------------------------------===//
14 def RetCC_XCore : CallingConv<[
15 // i32 are returned in registers R0, R1, R2, R3
16 CCIfType<[i32], CCAssignToReg<[R0, R1, R2, R3]>>,
18 // Integer values get stored in stack slots that are 4 bytes in
19 // size and 4-byte aligned.
20 CCIfType<[i32], CCAssignToStack<4, 4>>
23 //===----------------------------------------------------------------------===//
24 // XCore Argument Calling Conventions
25 //===----------------------------------------------------------------------===//
26 def CC_XCore : CallingConv<[
27 // Promote i8/i16 arguments to i32.
28 CCIfType<[i8, i16], CCPromoteToType<i32>>,
30 // The 'nest' parameter, if any, is passed in R11.
31 CCIfNest<CCAssignToReg<[R11]>>,
33 // The first 4 integer arguments are passed in integer registers.
34 CCIfType<[i32], CCAssignToReg<[R0, R1, R2, R3]>>,
36 // Integer values get stored in stack slots that are 4 bytes in
37 // size and 4-byte aligned.
38 CCIfType<[i32], CCAssignToStack<4, 4>>