1 //===- MBlazeCallingConv.td - Calling Conventions for MBlaze ----*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
9 // This describes the calling conventions for MBlaze architecture.
10 //===----------------------------------------------------------------------===//
12 /// CCIfSubtarget - Match if the current subtarget has a feature F.
13 class CCIfSubtarget<string F, CCAction A>:
14 CCIf<!strconcat("State.getTarget().getSubtarget<MBlazeSubtarget>().", F), A>;
16 //===----------------------------------------------------------------------===//
17 // MBlaze ABI Calling Convention
18 //===----------------------------------------------------------------------===//
20 def CC_MBlaze : CallingConv<[
21 // Promote i8/i16 arguments to i32.
22 CCIfType<[i8, i16], CCPromoteToType<i32>>,
24 // Integer arguments are passed in integer registers.
25 CCIfType<[i32], CCAssignToReg<[R5, R6, R7, R8, R9, R10]>>,
27 // Single fp arguments are passed in floating point registers
28 CCIfType<[f32], CCAssignToReg<[F5, F6, F7, F8, F9, F10]>>,
30 // 32-bit values get stored in stack slots that are 4 bytes in
31 // size and 4-byte aligned.
32 CCIfType<[i32, f32], CCAssignToStack<4, 4>>
35 def RetCC_MBlaze : CallingConv<[
36 // i32 are returned in registers R3, R4
37 CCIfType<[i32], CCAssignToReg<[R3, R4]>>,
39 // f32 are returned in registers F3, F4
40 CCIfType<[f32], CCAssignToReg<[F3, F4]>>