1 //===- SPUCallingConv.td - Calling Conventions for CellSPU ------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by a team from the Computer Systems Research
6 // Department at The Aerospace Corporation.
8 // See README.txt for details.
10 //===----------------------------------------------------------------------===//
12 // This describes the calling conventions for the STI Cell SPU architecture.
14 //===----------------------------------------------------------------------===//
16 /// CCIfSubtarget - Match if the current subtarget has a feature F.
17 class CCIfSubtarget<string F, CCAction A>
18 : CCIf<!strconcat("State.getTarget().getSubtarget<PPCSubtarget>().", F), A>;
20 //===----------------------------------------------------------------------===//
21 // Return Value Calling Convention
22 //===----------------------------------------------------------------------===//
24 // Return-value convention for Cell SPU: Everything can be passed back via $3:
25 def RetCC_SPU : CallingConv<[
26 CCIfType<[i32], CCAssignToReg<[R3]>>,
27 CCIfType<[i64], CCAssignToReg<[R3]>>,
28 CCIfType<[f32, f64], CCAssignToReg<[R3]>>,
29 CCIfType<[v16i8, v8i16, v4i32, v2i64, v4f32, v2f64], CCAssignToReg<[R3]>>
33 //===----------------------------------------------------------------------===//
34 // CellSPU Argument Calling Conventions
36 //===----------------------------------------------------------------------===//
38 def CC_SPU : CallingConv<[
39 // The first 8 integer arguments are passed in integer registers.
40 CCIfType<[i32], CCAssignToReg<[R3, R4, R5, R6, R7, R8, R9, R10]>>,
41 CCIfType<[i64], CCAssignToReg<[X3, X4, X5, X6, X7, X8, X9, X10]>>,
43 // SPU can pass back arguments in all
44 CCIfType<[f32, f64], CCIfSubtarget<"isMachoABI()",
45 CCAssignToReg<[F1, F2, F3, F4, F5, F6, F7, F8,F9,F10,F11,F12,F13]>>>,
46 // Other sub-targets pass FP values in F1-10.
47 CCIfType<[f32, f64], CCAssignToReg<[F1, F2, F3, F4, F5, F6, F7, F8, F9,F10]>>,
49 // The first 12 Vector arguments are passed in altivec registers.
50 CCIfType<[v16i8, v8i16, v4i32, v4f32],
51 CCAssignToReg<[V2, V3, V4, V5, V6, V7, V8, V9, V10,V11,V12,V13]>>
54 // Integer/FP values get stored in stack slots that are 8 bytes in size and
55 // 8-byte aligned if there are no more registers to hold them.
56 CCIfType<[i32, i64, f32, f64], CCAssignToStack<8, 8>>,
58 // Vectors get 16-byte stack slots that are 16-byte aligned.
59 CCIfType<[v16i8, v8i16, v4i32, v2i64, v4f32, v2f64],
60 CCAssignToStack<16, 16>>*/