1 //===- PPCCallingConv.td - Calling Conventions for PowerPC -*- 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 PowerPC 32- and 64-bit
13 //===----------------------------------------------------------------------===//
15 /// CCIfSubtarget - Match if the current subtarget has a feature F.
16 class CCIfSubtarget<string F, CCAction A>
17 : CCIf<!strconcat("static_cast<const PPCSubtarget&>"
18 "(State.getMachineFunction().getSubtarget()).",
21 class CCIfNotSubtarget<string F, CCAction A>
22 : CCIf<!strconcat("!static_cast<const PPCSubtarget&>"
23 "(State.getMachineFunction().getSubtarget()).",
26 class CCIfOrigArgWasNotPPCF128<CCAction A>
27 : CCIf<"!static_cast<PPCCCState *>(&State)->WasOriginalArgPPCF128(ValNo)",
29 class CCIfOrigArgWasPPCF128<CCAction A>
30 : CCIf<"static_cast<PPCCCState *>(&State)->WasOriginalArgPPCF128(ValNo)",
33 //===----------------------------------------------------------------------===//
34 // Return Value Calling Convention
35 //===----------------------------------------------------------------------===//
37 // PPC64 AnyReg return-value convention. No explicit register is specified for
38 // the return-value. The register allocator is allowed and expected to choose
41 // This calling convention is currently only supported by the stackmap and
42 // patchpoint intrinsics. All other uses will result in an assert on Debug
43 // builds. On Release builds we fallback to the PPC C calling convention.
44 def RetCC_PPC64_AnyReg : CallingConv<[
45 CCCustom<"CC_PPC_AnyReg_Error">
48 // Return-value convention for PowerPC
49 def RetCC_PPC : CallingConv<[
50 CCIfCC<"CallingConv::AnyReg", CCDelegateTo<RetCC_PPC64_AnyReg>>,
52 // On PPC64, integer return values are always promoted to i64
53 CCIfType<[i32, i1], CCIfSubtarget<"isPPC64()", CCPromoteToType<i64>>>,
54 CCIfType<[i1], CCIfNotSubtarget<"isPPC64()", CCPromoteToType<i32>>>,
56 CCIfType<[i32], CCAssignToReg<[R3, R4, R5, R6, R7, R8, R9, R10]>>,
57 CCIfType<[i64], CCAssignToReg<[X3, X4, X5, X6]>>,
58 CCIfType<[i128], CCAssignToReg<[X3, X4, X5, X6]>>,
60 // Floating point types returned as "direct" go into F1 .. F8; note that
61 // only the ELFv2 ABI fully utilizes all these registers.
62 CCIfType<[f32], CCAssignToReg<[F1, F2, F3, F4, F5, F6, F7, F8]>>,
63 CCIfType<[f64], CCAssignToReg<[F1, F2, F3, F4, F5, F6, F7, F8]>>,
65 // QPX vectors are returned in QF1 and QF2.
66 CCIfType<[v4f64, v4f32, v4i1],
67 CCIfSubtarget<"hasQPX()", CCAssignToReg<[QF1, QF2]>>>,
69 // Vector types returned as "direct" go into V2 .. V9; note that only the
70 // ELFv2 ABI fully utilizes all these registers.
71 CCIfType<[v16i8, v8i16, v4i32, v2i64, v1i128, v4f32, v2f64],
72 CCIfSubtarget<"hasAltivec()",
73 CCAssignToReg<[V2, V3, V4, V5, V6, V7, V8, V9]>>>
76 // No explicit register is specified for the AnyReg calling convention. The
77 // register allocator may assign the arguments to any free register.
79 // This calling convention is currently only supported by the stackmap and
80 // patchpoint intrinsics. All other uses will result in an assert on Debug
81 // builds. On Release builds we fallback to the PPC C calling convention.
82 def CC_PPC64_AnyReg : CallingConv<[
83 CCCustom<"CC_PPC_AnyReg_Error">
86 // Note that we don't currently have calling conventions for 64-bit
87 // PowerPC, but handle all the complexities of the ABI in the lowering
88 // logic. FIXME: See if the logic can be simplified with use of CCs.
89 // This may require some extensions to current table generation.
91 // Simple calling convention for 64-bit ELF PowerPC fast isel.
92 // Only handle ints and floats. All ints are promoted to i64.
93 // Vector types and quadword ints are not handled.
94 def CC_PPC64_ELF_FIS : CallingConv<[
95 CCIfCC<"CallingConv::AnyReg", CCDelegateTo<CC_PPC64_AnyReg>>,
97 CCIfType<[i1], CCPromoteToType<i64>>,
98 CCIfType<[i8], CCPromoteToType<i64>>,
99 CCIfType<[i16], CCPromoteToType<i64>>,
100 CCIfType<[i32], CCPromoteToType<i64>>,
101 CCIfType<[i64], CCAssignToReg<[X3, X4, X5, X6, X7, X8, X9, X10]>>,
102 CCIfType<[f32, f64], CCAssignToReg<[F1, F2, F3, F4, F5, F6, F7, F8]>>
105 // Simple return-value convention for 64-bit ELF PowerPC fast isel.
106 // All small ints are promoted to i64. Vector types, quadword ints,
107 // and multiple register returns are "supported" to avoid compile
108 // errors, but none are handled by the fast selector.
109 def RetCC_PPC64_ELF_FIS : CallingConv<[
110 CCIfCC<"CallingConv::AnyReg", CCDelegateTo<RetCC_PPC64_AnyReg>>,
112 CCIfType<[i1], CCPromoteToType<i64>>,
113 CCIfType<[i8], CCPromoteToType<i64>>,
114 CCIfType<[i16], CCPromoteToType<i64>>,
115 CCIfType<[i32], CCPromoteToType<i64>>,
116 CCIfType<[i64], CCAssignToReg<[X3, X4, X5, X6]>>,
117 CCIfType<[i128], CCAssignToReg<[X3, X4, X5, X6]>>,
118 CCIfType<[f32], CCAssignToReg<[F1, F2, F3, F4, F5, F6, F7, F8]>>,
119 CCIfType<[f64], CCAssignToReg<[F1, F2, F3, F4, F5, F6, F7, F8]>>,
120 CCIfType<[v4f64, v4f32, v4i1],
121 CCIfSubtarget<"hasQPX()", CCAssignToReg<[QF1, QF2]>>>,
122 CCIfType<[v16i8, v8i16, v4i32, v2i64, v1i128, v4f32, v2f64],
123 CCIfSubtarget<"hasAltivec()",
124 CCAssignToReg<[V2, V3, V4, V5, V6, V7, V8, V9]>>>
127 //===----------------------------------------------------------------------===//
128 // PowerPC System V Release 4 32-bit ABI
129 //===----------------------------------------------------------------------===//
131 def CC_PPC32_SVR4_Common : CallingConv<[
132 CCIfType<[i1], CCPromoteToType<i32>>,
134 // The ABI requires i64 to be passed in two adjacent registers with the first
135 // register having an odd register number.
137 CCIfSplit<CCIfSubtarget<"useSoftFloat()",
138 CCIfOrigArgWasNotPPCF128<
139 CCCustom<"CC_PPC32_SVR4_Custom_AlignArgRegs">>>>>,
142 CCIfSplit<CCIfNotSubtarget<"useSoftFloat()",
143 CCCustom<"CC_PPC32_SVR4_Custom_AlignArgRegs">>>>,
144 CCIfSplit<CCIfSubtarget<"useSoftFloat()",
145 CCIfOrigArgWasPPCF128<CCCustom<
146 "CC_PPC32_SVR4_Custom_SkipLastArgRegsPPCF128">>>>,
148 // The 'nest' parameter, if any, is passed in R11.
149 CCIfNest<CCAssignToReg<[R11]>>,
151 // The first 8 integer arguments are passed in integer registers.
152 CCIfType<[i32], CCAssignToReg<[R3, R4, R5, R6, R7, R8, R9, R10]>>,
154 // Make sure the i64 words from a long double are either both passed in
155 // registers or both passed on the stack.
156 CCIfType<[f64], CCIfSplit<CCCustom<"CC_PPC32_SVR4_Custom_AlignFPArgRegs">>>,
158 // FP values are passed in F1 - F8.
159 CCIfType<[f32, f64], CCAssignToReg<[F1, F2, F3, F4, F5, F6, F7, F8]>>,
161 // Split arguments have an alignment of 8 bytes on the stack.
162 CCIfType<[i32], CCIfSplit<CCAssignToStack<4, 8>>>,
164 CCIfType<[i32], CCAssignToStack<4, 4>>,
166 // Floats are stored in double precision format, thus they have the same
167 // alignment and size as doubles.
168 CCIfType<[f32,f64], CCAssignToStack<8, 8>>,
170 // QPX vectors that are stored in double precision need 32-byte alignment.
171 CCIfType<[v4f64, v4i1], CCAssignToStack<32, 32>>,
173 // Vectors get 16-byte stack slots that are 16-byte aligned.
174 CCIfType<[v16i8, v8i16, v4i32, v4f32, v2f64, v2i64], CCAssignToStack<16, 16>>
177 // This calling convention puts vector arguments always on the stack. It is used
178 // to assign vector arguments which belong to the variable portion of the
179 // parameter list of a variable argument function.
180 def CC_PPC32_SVR4_VarArg : CallingConv<[
181 CCDelegateTo<CC_PPC32_SVR4_Common>
184 // In contrast to CC_PPC32_SVR4_VarArg, this calling convention first tries to
185 // put vector arguments in vector registers before putting them on the stack.
186 def CC_PPC32_SVR4 : CallingConv<[
187 // QPX vectors mirror the scalar FP convention.
188 CCIfType<[v4f64, v4f32, v4i1], CCIfSubtarget<"hasQPX()",
189 CCAssignToReg<[QF1, QF2, QF3, QF4, QF5, QF6, QF7, QF8]>>>,
191 // The first 12 Vector arguments are passed in AltiVec registers.
192 CCIfType<[v16i8, v8i16, v4i32, v2i64, v1i128, v4f32, v2f64],
193 CCIfSubtarget<"hasAltivec()", CCAssignToReg<[V2, V3, V4, V5, V6, V7,
194 V8, V9, V10, V11, V12, V13]>>>,
196 CCDelegateTo<CC_PPC32_SVR4_Common>
199 // Helper "calling convention" to handle aggregate by value arguments.
200 // Aggregate by value arguments are always placed in the local variable space
201 // of the caller. This calling convention is only used to assign those stack
202 // offsets in the callers stack frame.
204 // Still, the address of the aggregate copy in the callers stack frame is passed
205 // in a GPR (or in the parameter list area if all GPRs are allocated) from the
206 // caller to the callee. The location for the address argument is assigned by
207 // the CC_PPC32_SVR4 calling convention.
209 // The only purpose of CC_PPC32_SVR4_Custom_Dummy is to skip arguments which are
210 // not passed by value.
212 def CC_PPC32_SVR4_ByVal : CallingConv<[
213 CCIfByVal<CCPassByVal<4, 4>>,
215 CCCustom<"CC_PPC32_SVR4_Custom_Dummy">
218 def CSR_Altivec : CalleeSavedRegs<(add V20, V21, V22, V23, V24, V25, V26, V27,
219 V28, V29, V30, V31)>;
221 def CSR_Darwin32 : CalleeSavedRegs<(add R13, R14, R15, R16, R17, R18, R19, R20,
222 R21, R22, R23, R24, R25, R26, R27, R28,
223 R29, R30, R31, F14, F15, F16, F17, F18,
224 F19, F20, F21, F22, F23, F24, F25, F26,
225 F27, F28, F29, F30, F31, CR2, CR3, CR4
228 def CSR_Darwin32_Altivec : CalleeSavedRegs<(add CSR_Darwin32, CSR_Altivec)>;
230 def CSR_SVR432 : CalleeSavedRegs<(add R14, R15, R16, R17, R18, R19, R20,
231 R21, R22, R23, R24, R25, R26, R27, R28,
232 R29, R30, R31, F14, F15, F16, F17, F18,
233 F19, F20, F21, F22, F23, F24, F25, F26,
234 F27, F28, F29, F30, F31, CR2, CR3, CR4
237 def CSR_SVR432_Altivec : CalleeSavedRegs<(add CSR_SVR432, CSR_Altivec)>;
239 def CSR_Darwin64 : CalleeSavedRegs<(add X13, X14, X15, X16, X17, X18, X19, X20,
240 X21, X22, X23, X24, X25, X26, X27, X28,
241 X29, X30, X31, F14, F15, F16, F17, F18,
242 F19, F20, F21, F22, F23, F24, F25, F26,
243 F27, F28, F29, F30, F31, CR2, CR3, CR4
246 def CSR_Darwin64_Altivec : CalleeSavedRegs<(add CSR_Darwin64, CSR_Altivec)>;
248 def CSR_SVR464 : CalleeSavedRegs<(add X14, X15, X16, X17, X18, X19, X20,
249 X21, X22, X23, X24, X25, X26, X27, X28,
250 X29, X30, X31, F14, F15, F16, F17, F18,
251 F19, F20, F21, F22, F23, F24, F25, F26,
252 F27, F28, F29, F30, F31, CR2, CR3, CR4
255 // CSRs that are handled by prologue, epilogue.
256 def CSR_SRV464_TLS_PE : CalleeSavedRegs<(add)>;
258 def CSR_SVR464_ViaCopy : CalleeSavedRegs<(add CSR_SVR464)>;
260 def CSR_SVR464_Altivec : CalleeSavedRegs<(add CSR_SVR464, CSR_Altivec)>;
262 def CSR_SVR464_Altivec_ViaCopy : CalleeSavedRegs<(add CSR_SVR464_Altivec)>;
264 def CSR_SVR464_R2 : CalleeSavedRegs<(add CSR_SVR464, X2)>;
266 def CSR_SVR464_R2_ViaCopy : CalleeSavedRegs<(add CSR_SVR464_R2)>;
268 def CSR_SVR464_R2_Altivec : CalleeSavedRegs<(add CSR_SVR464_Altivec, X2)>;
270 def CSR_SVR464_R2_Altivec_ViaCopy : CalleeSavedRegs<(add CSR_SVR464_R2_Altivec)>;
272 def CSR_NoRegs : CalleeSavedRegs<(add)>;
274 def CSR_64_AllRegs: CalleeSavedRegs<(add X0, (sequence "X%u", 3, 10),
275 (sequence "X%u", 14, 31),
276 (sequence "F%u", 0, 31),
277 (sequence "CR%u", 0, 7))>;
279 def CSR_64_AllRegs_Altivec : CalleeSavedRegs<(add CSR_64_AllRegs,
280 (sequence "V%u", 0, 31))>;
282 def CSR_64_AllRegs_VSX : CalleeSavedRegs<(add CSR_64_AllRegs_Altivec,
283 (sequence "VSL%u", 0, 31))>;