| //===- MipsCallingConv.td - Calling Conventions for Mips --------*- C++ -*-===// |
| // |
| // 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 Mips architecture. |
| //===----------------------------------------------------------------------===// |
| |
| /// CCIfSubtarget - Match if the current subtarget has a feature F. |
| class CCIfSubtarget<string F, CCAction A>: |
| CCIf<!strconcat("State.getTarget().getSubtarget<MipsSubtarget>().", F), A>; |
| |
| //===----------------------------------------------------------------------===// |
| // Mips O32 Calling Convention |
| //===----------------------------------------------------------------------===// |
| |
| // Only the return rules are defined here for O32. The rules for argument |
| // passing are defined in MipsISelLowering.cpp. |
| def RetCC_MipsO32 : CallingConv<[ |
| // i32 are returned in registers V0, V1 |
| CCIfType<[i32], CCAssignToReg<[V0, V1]>>, |
| |
| // f32 are returned in registers F0, F1 |
| CCIfType<[f32], CCAssignToReg<[F0, F1]>>, |
| |
| // f64 are returned in register D0 |
| CCIfType<[f64], CCIfSubtarget<"isNotSingleFloat()", CCAssignToReg<[D0]>>> |
| ]>; |
| |
| //===----------------------------------------------------------------------===// |
| // Mips EABI Calling Convention |
| //===----------------------------------------------------------------------===// |
| |
| def CC_MipsEABI : CallingConv<[ |
| // Promote i8/i16 arguments to i32. |
| CCIfType<[i8, i16], CCPromoteToType<i32>>, |
| |
| // Integer arguments are passed in integer registers. |
| CCIfType<[i32], CCAssignToReg<[A0, A1, A2, A3, T0, T1, T2, T3]>>, |
| |
| // Single fp arguments are passed in pairs within 32-bit mode |
| CCIfType<[f32], CCIfSubtarget<"isSingleFloat()", |
| CCAssignToReg<[F12, F13, F14, F15, F16, F17, F18, F19]>>>, |
| |
| CCIfType<[f32], CCIfSubtarget<"isNotSingleFloat()", |
| CCAssignToReg<[F12, F14, F16, F18]>>>, |
| |
| // The first 4 doubl fp arguments are passed in single fp registers. |
| CCIfType<[f64], CCIfSubtarget<"isNotSingleFloat()", |
| CCAssignToReg<[D6, D7, D8, D9]>>>, |
| |
| // Integer values get stored in stack slots that are 4 bytes in |
| // size and 4-byte aligned. |
| CCIfType<[i32, f32], CCAssignToStack<4, 4>>, |
| |
| // Integer values get stored in stack slots that are 8 bytes in |
| // size and 8-byte aligned. |
| CCIfType<[f64], CCIfSubtarget<"isNotSingleFloat()", CCAssignToStack<8, 8>>> |
| ]>; |
| |
| def RetCC_MipsEABI : CallingConv<[ |
| // i32 are returned in registers V0, V1 |
| CCIfType<[i32], CCAssignToReg<[V0, V1]>>, |
| |
| // f32 are returned in registers F0, F1 |
| CCIfType<[f32], CCAssignToReg<[F0, F1]>>, |
| |
| // f64 are returned in register D0 |
| CCIfType<[f64], CCIfSubtarget<"isNotSingleFloat()", CCAssignToReg<[D0]>>> |
| ]>; |
| |
| //===----------------------------------------------------------------------===// |
| // Mips Calling Convention Dispatch |
| //===----------------------------------------------------------------------===// |
| |
| def CC_Mips : CallingConv<[ |
| CCIfSubtarget<"isABI_EABI()", CCDelegateTo<CC_MipsEABI>> |
| ]>; |
| |
| def RetCC_Mips : CallingConv<[ |
| CCIfSubtarget<"isABI_EABI()", CCDelegateTo<RetCC_MipsEABI>>, |
| CCDelegateTo<RetCC_MipsO32> |
| ]>; |