| //===- ARCCallingConv.td - Calling Conventions for ARC -----*- 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 ARC architecture. |
| //===----------------------------------------------------------------------===// |
| |
| //===----------------------------------------------------------------------===// |
| // ARC Return Value Calling Convention |
| //===----------------------------------------------------------------------===// |
| def RetCC_ARC : CallingConv<[ |
| // i32 are returned in registers R0, R1, R2, R3 |
| CCIfType<[i32, i64], CCAssignToReg<[R0, R1, R2, R3]>>, |
| |
| // Integer values get stored in stack slots that are 4 bytes in |
| // size and 4-byte aligned. |
| CCIfType<[i64], CCAssignToStack<8, 4>>, |
| CCIfType<[i32], CCAssignToStack<4, 4>> |
| ]>; |
| |
| //===----------------------------------------------------------------------===// |
| // ARC Argument Calling Conventions |
| //===----------------------------------------------------------------------===// |
| def CC_ARC : CallingConv<[ |
| // Promote i8/i16 arguments to i32. |
| CCIfType<[i8, i16], CCPromoteToType<i32>>, |
| |
| // The first 8 integer arguments are passed in integer registers. |
| CCIfType<[i32, i64], CCAssignToReg<[R0, R1, R2, R3, R4, R5, R6, R7]>>, |
| |
| // Integer values get stored in stack slots that are 4 bytes in |
| // size and 4-byte aligned. |
| CCIfType<[i64], CCAssignToStack<8, 4>>, |
| CCIfType<[i32], CCAssignToStack<4, 4>> |
| ]>; |
| |
| def CSR_ARC : CalleeSavedRegs<(add (sequence "R%u", 13, 25), GP, FP)>; |
