| //===- XtensaCallingConv.td - Xtensa Calling Conventions -*- 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 the Xtensa ABI. |
| //===----------------------------------------------------------------------===// |
| |
| //===----------------------------------------------------------------------===// |
| // Xtensa return value calling convention |
| //===----------------------------------------------------------------------===// |
| def RetCC_Xtensa : CallingConv<[ |
| // First two return values go in a2, a3, a4, a5 |
| CCIfType<[i32], CCAssignToReg<[A2, A3, A4, A5]>>, |
| CCIfType<[i64], CCAssignToRegWithShadow<[A2, A4], [A3, A5]>> |
| ]>; |
| |
| //===----------------------------------------------------------------------===// |
| // Callee-saved register lists. |
| //===----------------------------------------------------------------------===// |
| |
| def CSR_Xtensa : CalleeSavedRegs<(add A0, A12, A13, A14, A15)>; |
