SparcCallingConv.td revision 249423 
1//===-- SparcCallingConv.td - Calling Conventions Sparc ----*- 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 Sparc architectures.
11//
12//===----------------------------------------------------------------------===//
13
14//===----------------------------------------------------------------------===//
15// Return Value Calling Conventions
16//===----------------------------------------------------------------------===//
17
18// Sparc 32-bit C return-value convention.
19def RetCC_Sparc32 : CallingConv<[
20  CCIfType<[i32], CCAssignToReg<[I0, I1, I2, I3, I4, I5]>>,
21  CCIfType<[f32], CCAssignToReg<[F0, F1, F2, F3]>>,
22  CCIfType<[f64], CCAssignToReg<[D0, D1]>>
23]>;
24
25// Sparc 64-bit C return-value convention.
26def RetCC_Sparc64 : CallingConv<[
27  CCIfType<[i32], CCPromoteToType<i64>>,
28  CCIfType<[i64], CCAssignToReg<[I0, I1, I2, I3, I4, I5]>>,
29  CCIfType<[f32], CCAssignToReg<[F0, F1, F2, F3]>>,
30  CCIfType<[f64], CCAssignToReg<[D0, D1]>>
31]>;
32
33// Sparc 32-bit C Calling convention.
34def CC_Sparc32 : CallingConv<[
35  //Custom assign SRet to [sp+64].
36  CCIfSRet<CCCustom<"CC_Sparc_Assign_SRet">>,
37  // i32 f32 arguments get passed in integer registers if there is space.
38  CCIfType<[i32, f32], CCAssignToReg<[I0, I1, I2, I3, I4, I5]>>,
39  // f64 arguments are split and passed through registers or through stack.
40  CCIfType<[f64], CCCustom<"CC_Sparc_Assign_f64">>,
41
42  // Alternatively, they are assigned to the stack in 4-byte aligned units.
43  CCAssignToStack<4, 4>
44]>;
45
46// Sparc 64-bit C Calling convention.
47def CC_Sparc64 : CallingConv<[
48  // All integers are promoted to i64 by the caller.
49  CCIfType<[i32], CCPromoteToType<i64>>,
50  // Integer arguments get passed in integer registers if there is space.
51  CCIfType<[i64], CCAssignToReg<[I0, I1, I2, I3, I4, I5]>>,
52  // FIXME: Floating point arguments.
53
54  // Alternatively, they are assigned to the stack in 8-byte aligned units.
55  CCAssignToStack<8, 8>
56]>;
57