1 //===-- BPFCallingConv.td - Calling Conventions BPF --------*- tablegen -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This describes the calling conventions for the BPF architecture. 11 // 12 //===----------------------------------------------------------------------===// 13 14 // BPF 64-bit C return-value convention. 15 def RetCC_BPF64 : CallingConv<[CCIfType<[i64], CCAssignToReg<[R0]>>]>; 16 17 // BPF 64-bit C Calling convention. 18 def CC_BPF64 : CallingConv<[ 19 // Promote i8/i16/i32 args to i64 20 CCIfType<[ i8, i16, i32 ], CCPromoteToType<i64>>, 21 22 // All arguments get passed in integer registers if there is space. 23 CCIfType<[i64], CCAssignToReg<[ R1, R2, R3, R4, R5 ]>>, 24 25 // Could be assigned to the stack in 8-byte aligned units, but unsupported 26 CCAssignToStack<8, 8> 27 ]>; 28 29 // Return-value convention when -mattr=+alu32 enabled 30 def RetCC_BPF32 : CallingConv<[ 31 CCIfType<[i32], CCAssignToRegWithShadow<[W0], [R0]>>, 32 CCIfType<[i64], CCAssignToRegWithShadow<[R0], [W0]>> 33 ]>; 34 35 // Calling convention when -mattr=+alu32 enabled 36 def CC_BPF32 : CallingConv<[ 37 // Promote i8/i16/i32 args to i64 38 CCIfType<[i32], CCAssignToRegWithShadow<[W1, W2, W3, W4, W5], 39 [R1, R2, R3, R4, R5]>>, 40 41 // All arguments get passed in integer registers if there is space. 42 CCIfType<[i64], CCAssignToRegWithShadow<[R1, R2, R3, R4, R5], 43 [W1, W2, W3, W4, W5]>>, 44 45 // Could be assigned to the stack in 8-byte aligned units, but unsupported 46 CCAssignToStack<8, 8> 47 ]>; 48 49 def CSR : CalleeSavedRegs<(add R6, R7, R8, R9, R10)>; 50
