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//===- 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)>;
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