| //===-- BPFCallingConv.td - Calling Conventions BPF --------*- tablegen -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This describes the calling conventions for the BPF architecture. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // BPF 64-bit C return-value convention. |
| def RetCC_BPF64 : CallingConv<[CCIfType<[i64], CCAssignToReg<[R0]>>]>; |
| |
| // BPF 64-bit C Calling convention. |
| def CC_BPF64 : CallingConv<[ |
| // Promote i8/i16/i32 args to i64 |
| CCIfType<[ i8, i16, i32 ], CCPromoteToType<i64>>, |
| |
| // All arguments get passed in integer registers if there is space. |
| CCIfType<[i64], CCAssignToReg<[ R1, R2, R3, R4, R5 ]>>, |
| |
| // Could be assigned to the stack in 8-byte aligned units, but unsupported |
| CCAssignToStack<8, 8> |
| ]>; |
| |
| // Return-value convention when -mattr=+alu32 enabled |
| def RetCC_BPF32 : CallingConv<[ |
| CCIfType<[i32], CCAssignToRegWithShadow<[W0], [R0]>>, |
| CCIfType<[i64], CCAssignToRegWithShadow<[R0], [W0]>> |
| ]>; |
| |
| // Calling convention when -mattr=+alu32 enabled |
| def CC_BPF32 : CallingConv<[ |
| // Promote i8/i16/i32 args to i64 |
| CCIfType<[i32], CCAssignToRegWithShadow<[W1, W2, W3, W4, W5], |
| [R1, R2, R3, R4, R5]>>, |
| |
| // All arguments get passed in integer registers if there is space. |
| CCIfType<[i64], CCAssignToRegWithShadow<[R1, R2, R3, R4, R5], |
| [W1, W2, W3, W4, W5]>>, |
| |
| // Could be assigned to the stack in 8-byte aligned units, but unsupported |
| CCAssignToStack<8, 8> |
| ]>; |
| |
| def CSR : CalleeSavedRegs<(add R6, R7, R8, R9, R10)>; |
