1 //===- SparcCallingConv.td - Calling Conventions Sparc -----*- tablegen -*-===//
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 //===----------------------------------------------------------------------===//
10 // This describes the calling conventions for the Sparc architectures.
12 //===----------------------------------------------------------------------===//
14 //===----------------------------------------------------------------------===//
15 // Return Value Calling Conventions
16 //===----------------------------------------------------------------------===//
18 // Sparc 32-bit C return-value convention.
19 def 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]>>
25 // Sparc 32-bit C Calling convention.
26 def CC_Sparc32 : CallingConv<[
27 //Custom assign SRet to [sp+64].
28 CCIfSRet<CCCustom<"CC_Sparc_Assign_SRet">>,
29 // i32 f32 arguments get passed in integer registers if there is space.
30 CCIfType<[i32, f32], CCAssignToReg<[I0, I1, I2, I3, I4, I5]>>,
31 // f64 arguments are split and passed through registers or through stack.
32 CCIfType<[f64], CCCustom<"CC_Sparc_Assign_f64">>,
34 // Alternatively, they are assigned to the stack in 4-byte aligned units.