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Chris Lattner72a364c2010-08-17 16:20:04 +00001//===- PPCCallingConv.td - Calling Conventions for PowerPC -*- tablegen -*-===//
Jia Liub22310f2012-02-18 12:03:15 +00002//
Chris Lattner4f2e4e02007-03-06 00:59:59 +00003// The LLVM Compiler Infrastructure
4//
Chris Lattnerf3ebc3f2007-12-29 20:36:04 +00005// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
Jia Liub22310f2012-02-18 12:03:15 +00007//
Chris Lattner4f2e4e02007-03-06 00:59:59 +00008//===----------------------------------------------------------------------===//
9//
10// This describes the calling conventions for the PowerPC 32- and 64-bit
11// architectures.
12//
13//===----------------------------------------------------------------------===//
14
Ulrich Weigand339d0592012-11-05 19:39:45 +000015/// CCIfSubtarget - Match if the current subtarget has a feature F.
16class CCIfSubtarget<string F, CCAction A>
17 : CCIf<!strconcat("State.getTarget().getSubtarget<PPCSubtarget>().", F), A>;
18
Chris Lattner4f2e4e02007-03-06 00:59:59 +000019//===----------------------------------------------------------------------===//
20// Return Value Calling Convention
21//===----------------------------------------------------------------------===//
22
23// Return-value convention for PowerPC
24def RetCC_PPC : CallingConv<[
Ulrich Weigand339d0592012-11-05 19:39:45 +000025 // On PPC64, integer return values are always promoted to i64
26 CCIfType<[i32], CCIfSubtarget<"isPPC64()", CCPromoteToType<i64>>>,
27
Dale Johannesen92dcf1e2008-03-17 02:13:43 +000028 CCIfType<[i32], CCAssignToReg<[R3, R4, R5, R6, R7, R8, R9, R10]>>,
Dale Johannesencf87e712008-03-17 17:11:08 +000029 CCIfType<[i64], CCAssignToReg<[X3, X4, X5, X6]>>,
Bill Schmidtdee1ef82013-01-17 19:34:57 +000030 CCIfType<[i128], CCAssignToReg<[X3, X4, X5, X6]>>,
Chris Lattner4f2e4e02007-03-06 00:59:59 +000031
Bill Schmidt6b2940b2013-01-17 17:45:19 +000032 CCIfType<[f32], CCAssignToReg<[F1, F2]>>,
33 CCIfType<[f64], CCAssignToReg<[F1, F2, F3, F4]>>,
Chris Lattner4f2e4e02007-03-06 00:59:59 +000034
35 // Vector types are always returned in V2.
36 CCIfType<[v16i8, v8i16, v4i32, v4f32], CCAssignToReg<[V2]>>
37]>;
38
39
40//===----------------------------------------------------------------------===//
41// PowerPC Argument Calling Conventions
42//===----------------------------------------------------------------------===//
Chris Lattner90bb4fc2007-05-03 16:40:25 +000043/*
Chris Lattner4f2e4e02007-03-06 00:59:59 +000044def CC_PPC : CallingConv<[
45 // The first 8 integer arguments are passed in integer registers.
46 CCIfType<[i32], CCAssignToReg<[R3, R4, R5, R6, R7, R8, R9, R10]>>,
47 CCIfType<[i64], CCAssignToReg<[X3, X4, X5, X6, X7, X8, X9, X10]>>,
48
Nicolas Geoffrayb3e99a12007-04-03 12:35:28 +000049 // Common sub-targets passes FP values in F1 - F13
Tilmann Scheller773f14c2009-07-03 06:47:08 +000050 CCIfType<[f32, f64],
51 CCAssignToReg<[F1, F2, F3, F4, F5, F6, F7, F8,F9,F10,F11,F12,F13]>>,
Chris Lattner4f2e4e02007-03-06 00:59:59 +000052
53 // The first 12 Vector arguments are passed in altivec registers.
54 CCIfType<[v16i8, v8i16, v4i32, v4f32],
55 CCAssignToReg<[V2, V3, V4, V5, V6, V7, V8, V9, V10,V11,V12,V13]>>
56
57/*
58 // Integer/FP values get stored in stack slots that are 8 bytes in size and
59 // 8-byte aligned if there are no more registers to hold them.
60 CCIfType<[i32, i64, f32, f64], CCAssignToStack<8, 8>>,
61
62 // Vectors get 16-byte stack slots that are 16-byte aligned.
63 CCIfType<[v16i8, v8i16, v4i32, v2i64, v4f32, v2f64],
64 CCAssignToStack<16, 16>>*/
65]>;
66
Chris Lattner90bb4fc2007-05-03 16:40:25 +000067*/
68
Tilmann Schellerb93960d2009-07-03 06:45:56 +000069//===----------------------------------------------------------------------===//
70// PowerPC System V Release 4 ABI
71//===----------------------------------------------------------------------===//
72
Tilmann Schellerb93960d2009-07-03 06:45:56 +000073def CC_PPC_SVR4_Common : CallingConv<[
74 // The ABI requires i64 to be passed in two adjacent registers with the first
75 // register having an odd register number.
76 CCIfType<[i32], CCIfSplit<CCCustom<"CC_PPC_SVR4_Custom_AlignArgRegs">>>,
77
78 // The first 8 integer arguments are passed in integer registers.
Rafael Espindolaaf25cf82010-02-16 01:50:18 +000079 CCIfType<[i32], CCAssignToReg<[R3, R4, R5, R6, R7, R8, R9, R10]>>,
Tilmann Schellerb93960d2009-07-03 06:45:56 +000080
81 // Make sure the i64 words from a long double are either both passed in
82 // registers or both passed on the stack.
83 CCIfType<[f64], CCIfSplit<CCCustom<"CC_PPC_SVR4_Custom_AlignFPArgRegs">>>,
84
85 // FP values are passed in F1 - F8.
86 CCIfType<[f32, f64], CCAssignToReg<[F1, F2, F3, F4, F5, F6, F7, F8]>>,
87
88 // Split arguments have an alignment of 8 bytes on the stack.
89 CCIfType<[i32], CCIfSplit<CCAssignToStack<4, 8>>>,
90
91 CCIfType<[i32], CCAssignToStack<4, 4>>,
92
93 // Floats are stored in double precision format, thus they have the same
94 // alignment and size as doubles.
95 CCIfType<[f32,f64], CCAssignToStack<8, 8>>,
96
97 // Vectors get 16-byte stack slots that are 16-byte aligned.
98 CCIfType<[v16i8, v8i16, v4i32, v4f32], CCAssignToStack<16, 16>>
99]>;
100
101// This calling convention puts vector arguments always on the stack. It is used
102// to assign vector arguments which belong to the variable portion of the
103// parameter list of a variable argument function.
104def CC_PPC_SVR4_VarArg : CallingConv<[
105 CCDelegateTo<CC_PPC_SVR4_Common>
106]>;
107
108// In contrast to CC_PPC_SVR4_VarArg, this calling convention first tries to put
109// vector arguments in vector registers before putting them on the stack.
110def CC_PPC_SVR4 : CallingConv<[
111 // The first 12 Vector arguments are passed in AltiVec registers.
112 CCIfType<[v16i8, v8i16, v4i32, v4f32],
113 CCAssignToReg<[V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13]>>,
114
115 CCDelegateTo<CC_PPC_SVR4_Common>
116]>;
117
118// Helper "calling convention" to handle aggregate by value arguments.
119// Aggregate by value arguments are always placed in the local variable space
120// of the caller. This calling convention is only used to assign those stack
121// offsets in the callers stack frame.
122//
123// Still, the address of the aggregate copy in the callers stack frame is passed
124// in a GPR (or in the parameter list area if all GPRs are allocated) from the
125// caller to the callee. The location for the address argument is assigned by
126// the CC_PPC_SVR4 calling convention.
127//
128// The only purpose of CC_PPC_SVR4_Custom_Dummy is to skip arguments which are
129// not passed by value.
130
131def CC_PPC_SVR4_ByVal : CallingConv<[
132 CCIfByVal<CCPassByVal<4, 4>>,
133
134 CCCustom<"CC_PPC_SVR4_Custom_Dummy">
135]>;
136
Roman Divackyef21be22012-03-06 16:41:49 +0000137def CSR_Darwin32 : CalleeSavedRegs<(add R13, R14, R15, R16, R17, R18, R19, R20,
138 R21, R22, R23, R24, R25, R26, R27, R28,
139 R29, R30, R31, F14, F15, F16, F17, F18,
140 F19, F20, F21, F22, F23, F24, F25, F26,
141 F27, F28, F29, F30, F31, CR2, CR3, CR4,
142 V20, V21, V22, V23, V24, V25, V26, V27,
143 V28, V29, V30, V31)>;
144
145def CSR_SVR432 : CalleeSavedRegs<(add R14, R15, R16, R17, R18, R19, R20, VRSAVE,
146 R21, R22, R23, R24, R25, R26, R27, R28,
147 R29, R30, R31, F14, F15, F16, F17, F18,
148 F19, F20, F21, F22, F23, F24, F25, F26,
149 F27, F28, F29, F30, F31, CR2, CR3, CR4,
150 V20, V21, V22, V23, V24, V25, V26, V27,
151 V28, V29, V30, V31)>;
152
153def CSR_Darwin64 : CalleeSavedRegs<(add X13, X14, X15, X16, X17, X18, X19, X20,
154 X21, X22, X23, X24, X25, X26, X27, X28,
155 X29, X30, X31, F14, F15, F16, F17, F18,
156 F19, F20, F21, F22, F23, F24, F25, F26,
157 F27, F28, F29, F30, F31, CR2, CR3, CR4,
158 V20, V21, V22, V23, V24, V25, V26, V27,
159 V28, V29, V30, V31)>;
160
161def CSR_SVR464 : CalleeSavedRegs<(add X14, X15, X16, X17, X18, X19, X20, VRSAVE,
162 X21, X22, X23, X24, X25, X26, X27, X28,
163 X29, X30, X31, F14, F15, F16, F17, F18,
164 F19, F20, F21, F22, F23, F24, F25, F26,
165 F27, F28, F29, F30, F31, CR2, CR3, CR4,
166 V20, V21, V22, V23, V24, V25, V26, V27,
167 V28, V29, V30, V31)>;