1//===- LanaiCallingConv.td - Calling Conventions Lanai -------*- tablegen -*-===// 2// 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 6// 7//===----------------------------------------------------------------------===// 8// 9// This describes the calling conventions for the Lanai architectures. 10// 11//===----------------------------------------------------------------------===// 12 13//===----------------------------------------------------------------------===// 14// Return Value Calling Conventions 15//===----------------------------------------------------------------------===// 16 17// Lanai 32-bit C Calling convention. 18def CC_Lanai32 : CallingConv<[ 19 // Promote i8/i16 args to i32 20 CCIfType<[i8, i16], CCPromoteToType<i32>>, 21 22 // Put argument in registers if marked 'inreg' and not a vararg call. 23 CCIfNotVarArg<CCIfInReg<CCIfType<[i32], 24 CCAssignToReg<[R6, R7, R18, R19]>>>>, 25 26 // Otherwise they are assigned to the stack in 4-byte aligned units. 27 CCAssignToStack<4, 4> 28]>; 29 30// Lanai 32-bit Fast Calling convention. 31def CC_Lanai32_Fast : CallingConv<[ 32 // Promote i8/i16 args to i32 33 CCIfType<[ i8, i16 ], CCPromoteToType<i32>>, 34 35 // Put arguments in registers. 36 CCIfNotVarArg<CCIfType<[i32], CCAssignToReg<[ R6, R7, R18, R19 ]>>>, 37 38 // Otherwise they are assigned to the stack in 4-byte aligned units. 39 CCAssignToStack<4, 4> 40]>; 41 42// Lanai 32-bit C return-value convention. 43def RetCC_Lanai32 : CallingConv<[ 44 // Specify two registers to allow returning 64-bit results that have already 45 // been lowered to 2 32-bit values. 46 CCIfType<[i32], CCAssignToReg<[RV, R9]>> 47]>; 48 49def CSR: CalleeSavedRegs<(add)>; 50