1 //===- PPCRegisterInfo.td - The PowerPC Register File ------*- 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 //===----------------------------------------------------------------------===//
11 //===----------------------------------------------------------------------===//
13 let Namespace = "PPC" in {
14 def sub_lt : SubRegIndex;
15 def sub_gt : SubRegIndex;
16 def sub_eq : SubRegIndex;
17 def sub_un : SubRegIndex;
18 def sub_32 : SubRegIndex;
22 class PPCReg<string n> : Register<n> {
23 let Namespace = "PPC";
26 // We identify all our registers with a 5-bit ID, for consistency's sake.
28 // GPR - One of the 32 32-bit general-purpose registers
29 class GPR<bits<5> num, string n> : PPCReg<n> {
30 field bits<5> Num = num;
33 // GP8 - One of the 32 64-bit general-purpose registers
34 class GP8<GPR SubReg, string n> : PPCReg<n> {
35 field bits<5> Num = SubReg.Num;
36 let SubRegs = [SubReg];
37 let SubRegIndices = [sub_32];
40 // SPR - One of the 32-bit special-purpose registers
41 class SPR<bits<10> num, string n> : PPCReg<n> {
42 field bits<10> Num = num;
45 // FPR - One of the 32 64-bit floating-point registers
46 class FPR<bits<5> num, string n> : PPCReg<n> {
47 field bits<5> Num = num;
50 // VR - One of the 32 128-bit vector registers
51 class VR<bits<5> num, string n> : PPCReg<n> {
52 field bits<5> Num = num;
55 // CR - One of the 8 4-bit condition registers
56 class CR<bits<3> num, string n, list<Register> subregs> : PPCReg<n> {
57 field bits<3> Num = num;
58 let SubRegs = subregs;
61 // CRBIT - One of the 32 1-bit condition register fields
62 class CRBIT<bits<5> num, string n> : PPCReg<n> {
63 field bits<5> Num = num;
67 // General-purpose registers
68 def R0 : GPR< 0, "r0">, DwarfRegNum<[0]>;
69 def R1 : GPR< 1, "r1">, DwarfRegNum<[1]>;
70 def R2 : GPR< 2, "r2">, DwarfRegNum<[2]>;
71 def R3 : GPR< 3, "r3">, DwarfRegNum<[3]>;
72 def R4 : GPR< 4, "r4">, DwarfRegNum<[4]>;
73 def R5 : GPR< 5, "r5">, DwarfRegNum<[5]>;
74 def R6 : GPR< 6, "r6">, DwarfRegNum<[6]>;
75 def R7 : GPR< 7, "r7">, DwarfRegNum<[7]>;
76 def R8 : GPR< 8, "r8">, DwarfRegNum<[8]>;
77 def R9 : GPR< 9, "r9">, DwarfRegNum<[9]>;
78 def R10 : GPR<10, "r10">, DwarfRegNum<[10]>;
79 def R11 : GPR<11, "r11">, DwarfRegNum<[11]>;
80 def R12 : GPR<12, "r12">, DwarfRegNum<[12]>;
81 def R13 : GPR<13, "r13">, DwarfRegNum<[13]>;
82 def R14 : GPR<14, "r14">, DwarfRegNum<[14]>;
83 def R15 : GPR<15, "r15">, DwarfRegNum<[15]>;
84 def R16 : GPR<16, "r16">, DwarfRegNum<[16]>;
85 def R17 : GPR<17, "r17">, DwarfRegNum<[17]>;
86 def R18 : GPR<18, "r18">, DwarfRegNum<[18]>;
87 def R19 : GPR<19, "r19">, DwarfRegNum<[19]>;
88 def R20 : GPR<20, "r20">, DwarfRegNum<[20]>;
89 def R21 : GPR<21, "r21">, DwarfRegNum<[21]>;
90 def R22 : GPR<22, "r22">, DwarfRegNum<[22]>;
91 def R23 : GPR<23, "r23">, DwarfRegNum<[23]>;
92 def R24 : GPR<24, "r24">, DwarfRegNum<[24]>;
93 def R25 : GPR<25, "r25">, DwarfRegNum<[25]>;
94 def R26 : GPR<26, "r26">, DwarfRegNum<[26]>;
95 def R27 : GPR<27, "r27">, DwarfRegNum<[27]>;
96 def R28 : GPR<28, "r28">, DwarfRegNum<[28]>;
97 def R29 : GPR<29, "r29">, DwarfRegNum<[29]>;
98 def R30 : GPR<30, "r30">, DwarfRegNum<[30]>;
99 def R31 : GPR<31, "r31">, DwarfRegNum<[31]>;
101 // 64-bit General-purpose registers
102 def X0 : GP8< R0, "r0">, DwarfRegNum<[0]>;
103 def X1 : GP8< R1, "r1">, DwarfRegNum<[1]>;
104 def X2 : GP8< R2, "r2">, DwarfRegNum<[2]>;
105 def X3 : GP8< R3, "r3">, DwarfRegNum<[3]>;
106 def X4 : GP8< R4, "r4">, DwarfRegNum<[4]>;
107 def X5 : GP8< R5, "r5">, DwarfRegNum<[5]>;
108 def X6 : GP8< R6, "r6">, DwarfRegNum<[6]>;
109 def X7 : GP8< R7, "r7">, DwarfRegNum<[7]>;
110 def X8 : GP8< R8, "r8">, DwarfRegNum<[8]>;
111 def X9 : GP8< R9, "r9">, DwarfRegNum<[9]>;
112 def X10 : GP8<R10, "r10">, DwarfRegNum<[10]>;
113 def X11 : GP8<R11, "r11">, DwarfRegNum<[11]>;
114 def X12 : GP8<R12, "r12">, DwarfRegNum<[12]>;
115 def X13 : GP8<R13, "r13">, DwarfRegNum<[13]>;
116 def X14 : GP8<R14, "r14">, DwarfRegNum<[14]>;
117 def X15 : GP8<R15, "r15">, DwarfRegNum<[15]>;
118 def X16 : GP8<R16, "r16">, DwarfRegNum<[16]>;
119 def X17 : GP8<R17, "r17">, DwarfRegNum<[17]>;
120 def X18 : GP8<R18, "r18">, DwarfRegNum<[18]>;
121 def X19 : GP8<R19, "r19">, DwarfRegNum<[19]>;
122 def X20 : GP8<R20, "r20">, DwarfRegNum<[20]>;
123 def X21 : GP8<R21, "r21">, DwarfRegNum<[21]>;
124 def X22 : GP8<R22, "r22">, DwarfRegNum<[22]>;
125 def X23 : GP8<R23, "r23">, DwarfRegNum<[23]>;
126 def X24 : GP8<R24, "r24">, DwarfRegNum<[24]>;
127 def X25 : GP8<R25, "r25">, DwarfRegNum<[25]>;
128 def X26 : GP8<R26, "r26">, DwarfRegNum<[26]>;
129 def X27 : GP8<R27, "r27">, DwarfRegNum<[27]>;
130 def X28 : GP8<R28, "r28">, DwarfRegNum<[28]>;
131 def X29 : GP8<R29, "r29">, DwarfRegNum<[29]>;
132 def X30 : GP8<R30, "r30">, DwarfRegNum<[30]>;
133 def X31 : GP8<R31, "r31">, DwarfRegNum<[31]>;
135 // Floating-point registers
136 def F0 : FPR< 0, "f0">, DwarfRegNum<[32]>;
137 def F1 : FPR< 1, "f1">, DwarfRegNum<[33]>;
138 def F2 : FPR< 2, "f2">, DwarfRegNum<[34]>;
139 def F3 : FPR< 3, "f3">, DwarfRegNum<[35]>;
140 def F4 : FPR< 4, "f4">, DwarfRegNum<[36]>;
141 def F5 : FPR< 5, "f5">, DwarfRegNum<[37]>;
142 def F6 : FPR< 6, "f6">, DwarfRegNum<[38]>;
143 def F7 : FPR< 7, "f7">, DwarfRegNum<[39]>;
144 def F8 : FPR< 8, "f8">, DwarfRegNum<[40]>;
145 def F9 : FPR< 9, "f9">, DwarfRegNum<[41]>;
146 def F10 : FPR<10, "f10">, DwarfRegNum<[42]>;
147 def F11 : FPR<11, "f11">, DwarfRegNum<[43]>;
148 def F12 : FPR<12, "f12">, DwarfRegNum<[44]>;
149 def F13 : FPR<13, "f13">, DwarfRegNum<[45]>;
150 def F14 : FPR<14, "f14">, DwarfRegNum<[46]>;
151 def F15 : FPR<15, "f15">, DwarfRegNum<[47]>;
152 def F16 : FPR<16, "f16">, DwarfRegNum<[48]>;
153 def F17 : FPR<17, "f17">, DwarfRegNum<[49]>;
154 def F18 : FPR<18, "f18">, DwarfRegNum<[50]>;
155 def F19 : FPR<19, "f19">, DwarfRegNum<[51]>;
156 def F20 : FPR<20, "f20">, DwarfRegNum<[52]>;
157 def F21 : FPR<21, "f21">, DwarfRegNum<[53]>;
158 def F22 : FPR<22, "f22">, DwarfRegNum<[54]>;
159 def F23 : FPR<23, "f23">, DwarfRegNum<[55]>;
160 def F24 : FPR<24, "f24">, DwarfRegNum<[56]>;
161 def F25 : FPR<25, "f25">, DwarfRegNum<[57]>;
162 def F26 : FPR<26, "f26">, DwarfRegNum<[58]>;
163 def F27 : FPR<27, "f27">, DwarfRegNum<[59]>;
164 def F28 : FPR<28, "f28">, DwarfRegNum<[60]>;
165 def F29 : FPR<29, "f29">, DwarfRegNum<[61]>;
166 def F30 : FPR<30, "f30">, DwarfRegNum<[62]>;
167 def F31 : FPR<31, "f31">, DwarfRegNum<[63]>;
170 def V0 : VR< 0, "v0">, DwarfRegNum<[77]>;
171 def V1 : VR< 1, "v1">, DwarfRegNum<[78]>;
172 def V2 : VR< 2, "v2">, DwarfRegNum<[79]>;
173 def V3 : VR< 3, "v3">, DwarfRegNum<[80]>;
174 def V4 : VR< 4, "v4">, DwarfRegNum<[81]>;
175 def V5 : VR< 5, "v5">, DwarfRegNum<[82]>;
176 def V6 : VR< 6, "v6">, DwarfRegNum<[83]>;
177 def V7 : VR< 7, "v7">, DwarfRegNum<[84]>;
178 def V8 : VR< 8, "v8">, DwarfRegNum<[85]>;
179 def V9 : VR< 9, "v9">, DwarfRegNum<[86]>;
180 def V10 : VR<10, "v10">, DwarfRegNum<[87]>;
181 def V11 : VR<11, "v11">, DwarfRegNum<[88]>;
182 def V12 : VR<12, "v12">, DwarfRegNum<[89]>;
183 def V13 : VR<13, "v13">, DwarfRegNum<[90]>;
184 def V14 : VR<14, "v14">, DwarfRegNum<[91]>;
185 def V15 : VR<15, "v15">, DwarfRegNum<[92]>;
186 def V16 : VR<16, "v16">, DwarfRegNum<[93]>;
187 def V17 : VR<17, "v17">, DwarfRegNum<[94]>;
188 def V18 : VR<18, "v18">, DwarfRegNum<[95]>;
189 def V19 : VR<19, "v19">, DwarfRegNum<[96]>;
190 def V20 : VR<20, "v20">, DwarfRegNum<[97]>;
191 def V21 : VR<21, "v21">, DwarfRegNum<[98]>;
192 def V22 : VR<22, "v22">, DwarfRegNum<[99]>;
193 def V23 : VR<23, "v23">, DwarfRegNum<[100]>;
194 def V24 : VR<24, "v24">, DwarfRegNum<[101]>;
195 def V25 : VR<25, "v25">, DwarfRegNum<[102]>;
196 def V26 : VR<26, "v26">, DwarfRegNum<[103]>;
197 def V27 : VR<27, "v27">, DwarfRegNum<[104]>;
198 def V28 : VR<28, "v28">, DwarfRegNum<[105]>;
199 def V29 : VR<29, "v29">, DwarfRegNum<[106]>;
200 def V30 : VR<30, "v30">, DwarfRegNum<[107]>;
201 def V31 : VR<31, "v31">, DwarfRegNum<[108]>;
203 // Condition register bits
204 def CR0LT : CRBIT< 0, "0">, DwarfRegNum<[0]>;
205 def CR0GT : CRBIT< 1, "1">, DwarfRegNum<[0]>;
206 def CR0EQ : CRBIT< 2, "2">, DwarfRegNum<[0]>;
207 def CR0UN : CRBIT< 3, "3">, DwarfRegNum<[0]>;
208 def CR1LT : CRBIT< 4, "4">, DwarfRegNum<[0]>;
209 def CR1GT : CRBIT< 5, "5">, DwarfRegNum<[0]>;
210 def CR1EQ : CRBIT< 6, "6">, DwarfRegNum<[0]>;
211 def CR1UN : CRBIT< 7, "7">, DwarfRegNum<[0]>;
212 def CR2LT : CRBIT< 8, "8">, DwarfRegNum<[0]>;
213 def CR2GT : CRBIT< 9, "9">, DwarfRegNum<[0]>;
214 def CR2EQ : CRBIT<10, "10">, DwarfRegNum<[0]>;
215 def CR2UN : CRBIT<11, "11">, DwarfRegNum<[0]>;
216 def CR3LT : CRBIT<12, "12">, DwarfRegNum<[0]>;
217 def CR3GT : CRBIT<13, "13">, DwarfRegNum<[0]>;
218 def CR3EQ : CRBIT<14, "14">, DwarfRegNum<[0]>;
219 def CR3UN : CRBIT<15, "15">, DwarfRegNum<[0]>;
220 def CR4LT : CRBIT<16, "16">, DwarfRegNum<[0]>;
221 def CR4GT : CRBIT<17, "17">, DwarfRegNum<[0]>;
222 def CR4EQ : CRBIT<18, "18">, DwarfRegNum<[0]>;
223 def CR4UN : CRBIT<19, "19">, DwarfRegNum<[0]>;
224 def CR5LT : CRBIT<20, "20">, DwarfRegNum<[0]>;
225 def CR5GT : CRBIT<21, "21">, DwarfRegNum<[0]>;
226 def CR5EQ : CRBIT<22, "22">, DwarfRegNum<[0]>;
227 def CR5UN : CRBIT<23, "23">, DwarfRegNum<[0]>;
228 def CR6LT : CRBIT<24, "24">, DwarfRegNum<[0]>;
229 def CR6GT : CRBIT<25, "25">, DwarfRegNum<[0]>;
230 def CR6EQ : CRBIT<26, "26">, DwarfRegNum<[0]>;
231 def CR6UN : CRBIT<27, "27">, DwarfRegNum<[0]>;
232 def CR7LT : CRBIT<28, "28">, DwarfRegNum<[0]>;
233 def CR7GT : CRBIT<29, "29">, DwarfRegNum<[0]>;
234 def CR7EQ : CRBIT<30, "30">, DwarfRegNum<[0]>;
235 def CR7UN : CRBIT<31, "31">, DwarfRegNum<[0]>;
237 // Condition registers
238 let SubRegIndices = [sub_lt, sub_gt, sub_eq, sub_un] in {
239 def CR0 : CR<0, "cr0", [CR0LT, CR0GT, CR0EQ, CR0UN]>, DwarfRegNum<[68]>;
240 def CR1 : CR<1, "cr1", [CR1LT, CR1GT, CR1EQ, CR1UN]>, DwarfRegNum<[69]>;
241 def CR2 : CR<2, "cr2", [CR2LT, CR2GT, CR2EQ, CR2UN]>, DwarfRegNum<[70]>;
242 def CR3 : CR<3, "cr3", [CR3LT, CR3GT, CR3EQ, CR3UN]>, DwarfRegNum<[71]>;
243 def CR4 : CR<4, "cr4", [CR4LT, CR4GT, CR4EQ, CR4UN]>, DwarfRegNum<[72]>;
244 def CR5 : CR<5, "cr5", [CR5LT, CR5GT, CR5EQ, CR5UN]>, DwarfRegNum<[73]>;
245 def CR6 : CR<6, "cr6", [CR6LT, CR6GT, CR6EQ, CR6UN]>, DwarfRegNum<[74]>;
246 def CR7 : CR<7, "cr7", [CR7LT, CR7GT, CR7EQ, CR7UN]>, DwarfRegNum<[75]>;
250 def LR : SPR<8, "lr">, DwarfRegNum<[65]>;
251 //let Aliases = [LR] in
252 def LR8 : SPR<8, "lr">, DwarfRegNum<[65]>;
255 def CTR : SPR<9, "ctr">, DwarfRegNum<[66]>;
256 def CTR8 : SPR<9, "ctr">, DwarfRegNum<[66]>;
259 def VRSAVE: SPR<256, "VRsave">, DwarfRegNum<[107]>;
261 // Carry bit. In the architecture this is really bit 0 of the XER register
262 // (which really is SPR register 1); this is the only bit interesting to a
264 def CARRY: SPR<1, "ca">, DwarfRegNum<[0]>;
266 // FP rounding mode: bits 30 and 31 of the FP status and control register
267 // This is not allocated as a normal register; it appears only in
268 // Uses and Defs. The ABI says it needs to be preserved by a function,
269 // but this is not achieved by saving and restoring it as with
270 // most registers, it has to be done in code; to make this work all the
271 // return and call instructions are described as Uses of RM, so instructions
272 // that do nothing but change RM will not get deleted.
273 // Also, in the architecture it is not really a SPR; 512 is arbitrary.
274 def RM: SPR<512, "**ROUNDING MODE**">, DwarfRegNum<[0]>;
277 // Allocate volatiles first
278 // then nonvolatiles in reverse order since stmw/lmw save from rN to r31
279 def GPRC : RegisterClass<"PPC", [i32], 32,
280 [R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12,
281 R30, R29, R28, R27, R26, R25, R24, R23, R22, R21, R20, R19, R18, R17,
282 R16, R15, R14, R13, R31, R0, R1, LR]>
284 let MethodProtos = [{
285 iterator allocation_order_begin(const MachineFunction &MF) const;
286 iterator allocation_order_end(const MachineFunction &MF) const;
288 let MethodBodies = [{
290 GPRCClass::allocation_order_begin(const MachineFunction &MF) const {
291 // 32-bit SVR4 ABI: r2 is reserved for the OS.
292 // 64-bit SVR4 ABI: r2 is reserved for the TOC pointer.
293 // Darwin: R2 is reserved for CR save/restore sequence.
297 GPRCClass::allocation_order_end(const MachineFunction &MF) const {
298 // On PPC64, r13 is the thread pointer. Never allocate this register.
299 // Note that this is overconservative, as it also prevents allocation of
300 // R31 when the FP is not needed.
301 // When using the 32-bit SVR4 ABI, r13 is reserved for the Small Data Area
303 const PPCSubtarget &Subtarget
304 = MF.getTarget().getSubtarget<PPCSubtarget>();
306 if (Subtarget.isPPC64() || Subtarget.isSVR4ABI())
307 return end()-5; // don't allocate R13, R31, R0, R1, LR
310 return end()-4; // don't allocate R31, R0, R1, LR
312 return end()-3; // don't allocate R0, R1, LR
316 def G8RC : RegisterClass<"PPC", [i64], 64,
317 [X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12,
318 X30, X29, X28, X27, X26, X25, X24, X23, X22, X21, X20, X19, X18, X17,
319 X16, X15, X14, X31, X13, X0, X1, LR8]>
321 let MethodProtos = [{
322 iterator allocation_order_begin(const MachineFunction &MF) const;
323 iterator allocation_order_end(const MachineFunction &MF) const;
325 let MethodBodies = [{
327 G8RCClass::allocation_order_begin(const MachineFunction &MF) const {
328 // 64-bit SVR4 ABI: r2 is reserved for the TOC pointer.
329 // Darwin: r2 is reserved for CR save/restore sequence.
333 G8RCClass::allocation_order_end(const MachineFunction &MF) const {
342 // Allocate volatiles first, then non-volatiles in reverse order. With the SVR4
343 // ABI the size of the Floating-point register save area is determined by the
344 // allocated non-volatile register with the lowest register number, as FP
345 // register N is spilled to offset 8 * (32 - N) below the back chain word of the
346 // previous stack frame. By allocating non-volatiles in reverse order we make
347 // sure that the Floating-point register save area is always as small as
348 // possible because there aren't any unused spill slots.
349 def F8RC : RegisterClass<"PPC", [f64], 64, [F0, F1, F2, F3, F4, F5, F6, F7,
350 F8, F9, F10, F11, F12, F13, F31, F30, F29, F28, F27, F26, F25, F24, F23,
351 F22, F21, F20, F19, F18, F17, F16, F15, F14]>;
352 def F4RC : RegisterClass<"PPC", [f32], 32, [F0, F1, F2, F3, F4, F5, F6, F7,
353 F8, F9, F10, F11, F12, F13, F31, F30, F29, F28, F27, F26, F25, F24, F23,
354 F22, F21, F20, F19, F18, F17, F16, F15, F14]>;
356 def VRRC : RegisterClass<"PPC", [v16i8,v8i16,v4i32,v4f32], 128,
357 [V2, V3, V4, V5, V0, V1,
358 V6, V7, V8, V9, V10, V11, V12, V13, V14, V15, V16, V17, V18, V19, V31, V30,
359 V29, V28, V27, V26, V25, V24, V23, V22, V21, V20]>;
361 def CRBITRC : RegisterClass<"PPC", [i32], 32,
362 [CR0LT, CR0GT, CR0EQ, CR0UN,
363 CR1LT, CR1GT, CR1EQ, CR1UN,
364 CR2LT, CR2GT, CR2EQ, CR2UN,
365 CR3LT, CR3GT, CR3EQ, CR3UN,
366 CR4LT, CR4GT, CR4EQ, CR4UN,
367 CR5LT, CR5GT, CR5EQ, CR5UN,
368 CR6LT, CR6GT, CR6EQ, CR6UN,
369 CR7LT, CR7GT, CR7EQ, CR7UN
375 def CRRC : RegisterClass<"PPC", [i32], 32, [CR0, CR1, CR5, CR6, CR7, CR2,
378 let SubRegClasses = [(CRBITRC sub_lt, sub_gt, sub_eq, sub_un)];
381 def CTRRC : RegisterClass<"PPC", [i32], 32, [CTR]>;
382 def CTRRC8 : RegisterClass<"PPC", [i64], 64, [CTR8]>;
383 def VRSAVERC : RegisterClass<"PPC", [i32], 32, [VRSAVE]>;
384 def CARRYRC : RegisterClass<"PPC", [i32], 32, [CARRY]> {