1 //===-- ARMRegisterInfo.td - ARM Register defs -------------*- 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 include "ARMSystemRegister.td"
12 //===----------------------------------------------------------------------===//
13 // Declarations that describe the ARM register file
14 //===----------------------------------------------------------------------===//
16 // Registers are identified with 4-bit ID numbers.
17 class ARMReg<bits<16> Enc, string n, list<Register> subregs = []> : Register<n> {
19 let Namespace = "ARM";
20 let SubRegs = subregs;
21 // All bits of ARM registers with sub-registers are covered by sub-registers.
22 let CoveredBySubRegs = 1;
25 class ARMFReg<bits<16> Enc, string n> : Register<n> {
27 let Namespace = "ARM";
30 // Subregister indices.
31 let Namespace = "ARM" in {
32 def qqsub_0 : SubRegIndex<256>;
33 def qqsub_1 : SubRegIndex<256, 256>;
35 // Note: Code depends on these having consecutive numbers.
36 def qsub_0 : SubRegIndex<128>;
37 def qsub_1 : SubRegIndex<128, 128>;
38 def qsub_2 : ComposedSubRegIndex<qqsub_1, qsub_0>;
39 def qsub_3 : ComposedSubRegIndex<qqsub_1, qsub_1>;
41 def dsub_0 : SubRegIndex<64>;
42 def dsub_1 : SubRegIndex<64, 64>;
43 def dsub_2 : ComposedSubRegIndex<qsub_1, dsub_0>;
44 def dsub_3 : ComposedSubRegIndex<qsub_1, dsub_1>;
45 def dsub_4 : ComposedSubRegIndex<qsub_2, dsub_0>;
46 def dsub_5 : ComposedSubRegIndex<qsub_2, dsub_1>;
47 def dsub_6 : ComposedSubRegIndex<qsub_3, dsub_0>;
48 def dsub_7 : ComposedSubRegIndex<qsub_3, dsub_1>;
50 def ssub_0 : SubRegIndex<32>;
51 def ssub_1 : SubRegIndex<32, 32>;
52 def ssub_2 : ComposedSubRegIndex<dsub_1, ssub_0>;
53 def ssub_3 : ComposedSubRegIndex<dsub_1, ssub_1>;
54 def ssub_4 : ComposedSubRegIndex<dsub_2, ssub_0>;
55 def ssub_5 : ComposedSubRegIndex<dsub_2, ssub_1>;
56 def ssub_6 : ComposedSubRegIndex<dsub_3, ssub_0>;
57 def ssub_7 : ComposedSubRegIndex<dsub_3, ssub_1>;
58 def ssub_8 : ComposedSubRegIndex<dsub_4, ssub_0>;
59 def ssub_9 : ComposedSubRegIndex<dsub_4, ssub_1>;
60 def ssub_10 : ComposedSubRegIndex<dsub_5, ssub_0>;
61 def ssub_11 : ComposedSubRegIndex<dsub_5, ssub_1>;
62 def ssub_12 : ComposedSubRegIndex<dsub_6, ssub_0>;
63 def ssub_13 : ComposedSubRegIndex<dsub_6, ssub_1>;
65 def gsub_0 : SubRegIndex<32>;
66 def gsub_1 : SubRegIndex<32, 32>;
67 // Let TableGen synthesize the remaining 12 ssub_* indices.
68 // We don't need to name them.
72 def R0 : ARMReg< 0, "r0">, DwarfRegNum<[0]>;
73 def R1 : ARMReg< 1, "r1">, DwarfRegNum<[1]>;
74 def R2 : ARMReg< 2, "r2">, DwarfRegNum<[2]>;
75 def R3 : ARMReg< 3, "r3">, DwarfRegNum<[3]>;
76 def R4 : ARMReg< 4, "r4">, DwarfRegNum<[4]>;
77 def R5 : ARMReg< 5, "r5">, DwarfRegNum<[5]>;
78 def R6 : ARMReg< 6, "r6">, DwarfRegNum<[6]>;
79 def R7 : ARMReg< 7, "r7">, DwarfRegNum<[7]>;
80 // These require 32-bit instructions.
81 let CostPerUse = 1 in {
82 def R8 : ARMReg< 8, "r8">, DwarfRegNum<[8]>;
83 def R9 : ARMReg< 9, "r9">, DwarfRegNum<[9]>;
84 def R10 : ARMReg<10, "r10">, DwarfRegNum<[10]>;
85 def R11 : ARMReg<11, "r11">, DwarfRegNum<[11]>;
86 def R12 : ARMReg<12, "r12">, DwarfRegNum<[12]>;
87 def SP : ARMReg<13, "sp">, DwarfRegNum<[13]>;
88 def LR : ARMReg<14, "lr">, DwarfRegNum<[14]>;
89 def PC : ARMReg<15, "pc">, DwarfRegNum<[15]>;
93 def S0 : ARMFReg< 0, "s0">; def S1 : ARMFReg< 1, "s1">;
94 def S2 : ARMFReg< 2, "s2">; def S3 : ARMFReg< 3, "s3">;
95 def S4 : ARMFReg< 4, "s4">; def S5 : ARMFReg< 5, "s5">;
96 def S6 : ARMFReg< 6, "s6">; def S7 : ARMFReg< 7, "s7">;
97 def S8 : ARMFReg< 8, "s8">; def S9 : ARMFReg< 9, "s9">;
98 def S10 : ARMFReg<10, "s10">; def S11 : ARMFReg<11, "s11">;
99 def S12 : ARMFReg<12, "s12">; def S13 : ARMFReg<13, "s13">;
100 def S14 : ARMFReg<14, "s14">; def S15 : ARMFReg<15, "s15">;
101 def S16 : ARMFReg<16, "s16">; def S17 : ARMFReg<17, "s17">;
102 def S18 : ARMFReg<18, "s18">; def S19 : ARMFReg<19, "s19">;
103 def S20 : ARMFReg<20, "s20">; def S21 : ARMFReg<21, "s21">;
104 def S22 : ARMFReg<22, "s22">; def S23 : ARMFReg<23, "s23">;
105 def S24 : ARMFReg<24, "s24">; def S25 : ARMFReg<25, "s25">;
106 def S26 : ARMFReg<26, "s26">; def S27 : ARMFReg<27, "s27">;
107 def S28 : ARMFReg<28, "s28">; def S29 : ARMFReg<29, "s29">;
108 def S30 : ARMFReg<30, "s30">; def S31 : ARMFReg<31, "s31">;
110 // Aliases of the F* registers used to hold 64-bit fp values (doubles)
111 let SubRegIndices = [ssub_0, ssub_1] in {
112 def D0 : ARMReg< 0, "d0", [S0, S1]>, DwarfRegNum<[256]>;
113 def D1 : ARMReg< 1, "d1", [S2, S3]>, DwarfRegNum<[257]>;
114 def D2 : ARMReg< 2, "d2", [S4, S5]>, DwarfRegNum<[258]>;
115 def D3 : ARMReg< 3, "d3", [S6, S7]>, DwarfRegNum<[259]>;
116 def D4 : ARMReg< 4, "d4", [S8, S9]>, DwarfRegNum<[260]>;
117 def D5 : ARMReg< 5, "d5", [S10, S11]>, DwarfRegNum<[261]>;
118 def D6 : ARMReg< 6, "d6", [S12, S13]>, DwarfRegNum<[262]>;
119 def D7 : ARMReg< 7, "d7", [S14, S15]>, DwarfRegNum<[263]>;
120 def D8 : ARMReg< 8, "d8", [S16, S17]>, DwarfRegNum<[264]>;
121 def D9 : ARMReg< 9, "d9", [S18, S19]>, DwarfRegNum<[265]>;
122 def D10 : ARMReg<10, "d10", [S20, S21]>, DwarfRegNum<[266]>;
123 def D11 : ARMReg<11, "d11", [S22, S23]>, DwarfRegNum<[267]>;
124 def D12 : ARMReg<12, "d12", [S24, S25]>, DwarfRegNum<[268]>;
125 def D13 : ARMReg<13, "d13", [S26, S27]>, DwarfRegNum<[269]>;
126 def D14 : ARMReg<14, "d14", [S28, S29]>, DwarfRegNum<[270]>;
127 def D15 : ARMReg<15, "d15", [S30, S31]>, DwarfRegNum<[271]>;
130 // VFP3 defines 16 additional double registers
131 def D16 : ARMFReg<16, "d16">, DwarfRegNum<[272]>;
132 def D17 : ARMFReg<17, "d17">, DwarfRegNum<[273]>;
133 def D18 : ARMFReg<18, "d18">, DwarfRegNum<[274]>;
134 def D19 : ARMFReg<19, "d19">, DwarfRegNum<[275]>;
135 def D20 : ARMFReg<20, "d20">, DwarfRegNum<[276]>;
136 def D21 : ARMFReg<21, "d21">, DwarfRegNum<[277]>;
137 def D22 : ARMFReg<22, "d22">, DwarfRegNum<[278]>;
138 def D23 : ARMFReg<23, "d23">, DwarfRegNum<[279]>;
139 def D24 : ARMFReg<24, "d24">, DwarfRegNum<[280]>;
140 def D25 : ARMFReg<25, "d25">, DwarfRegNum<[281]>;
141 def D26 : ARMFReg<26, "d26">, DwarfRegNum<[282]>;
142 def D27 : ARMFReg<27, "d27">, DwarfRegNum<[283]>;
143 def D28 : ARMFReg<28, "d28">, DwarfRegNum<[284]>;
144 def D29 : ARMFReg<29, "d29">, DwarfRegNum<[285]>;
145 def D30 : ARMFReg<30, "d30">, DwarfRegNum<[286]>;
146 def D31 : ARMFReg<31, "d31">, DwarfRegNum<[287]>;
148 // Advanced SIMD (NEON) defines 16 quad-word aliases
149 let SubRegIndices = [dsub_0, dsub_1] in {
150 def Q0 : ARMReg< 0, "q0", [D0, D1]>;
151 def Q1 : ARMReg< 1, "q1", [D2, D3]>;
152 def Q2 : ARMReg< 2, "q2", [D4, D5]>;
153 def Q3 : ARMReg< 3, "q3", [D6, D7]>;
154 def Q4 : ARMReg< 4, "q4", [D8, D9]>;
155 def Q5 : ARMReg< 5, "q5", [D10, D11]>;
156 def Q6 : ARMReg< 6, "q6", [D12, D13]>;
157 def Q7 : ARMReg< 7, "q7", [D14, D15]>;
159 let SubRegIndices = [dsub_0, dsub_1] in {
160 def Q8 : ARMReg< 8, "q8", [D16, D17]>;
161 def Q9 : ARMReg< 9, "q9", [D18, D19]>;
162 def Q10 : ARMReg<10, "q10", [D20, D21]>;
163 def Q11 : ARMReg<11, "q11", [D22, D23]>;
164 def Q12 : ARMReg<12, "q12", [D24, D25]>;
165 def Q13 : ARMReg<13, "q13", [D26, D27]>;
166 def Q14 : ARMReg<14, "q14", [D28, D29]>;
167 def Q15 : ARMReg<15, "q15", [D30, D31]>;
170 // Current Program Status Register.
171 // We model fpscr with two registers: FPSCR models the control bits and will be
172 // reserved. FPSCR_NZCV models the flag bits and will be unreserved. APSR_NZCV
173 // models the APSR when it's accessed by some special instructions. In such cases
174 // it has the same encoding as PC.
175 def CPSR : ARMReg<0, "cpsr">;
176 def APSR : ARMReg<1, "apsr">;
177 def APSR_NZCV : ARMReg<15, "apsr_nzcv">;
178 def SPSR : ARMReg<2, "spsr">;
179 def FPSCR : ARMReg<3, "fpscr">;
180 def FPSCR_NZCV : ARMReg<3, "fpscr_nzcv"> {
181 let Aliases = [FPSCR];
183 def ITSTATE : ARMReg<4, "itstate">;
185 // Special Registers - only available in privileged mode.
186 def FPSID : ARMReg<0, "fpsid">;
187 def MVFR2 : ARMReg<5, "mvfr2">;
188 def MVFR1 : ARMReg<6, "mvfr1">;
189 def MVFR0 : ARMReg<7, "mvfr0">;
190 def FPEXC : ARMReg<8, "fpexc">;
191 def FPINST : ARMReg<9, "fpinst">;
192 def FPINST2 : ARMReg<10, "fpinst2">;
196 // pc == Program Counter
197 // lr == Link Register
198 // sp == Stack Pointer
199 // r12 == ip (scratch)
200 // r7 == Frame Pointer (thumb-style backtraces)
201 // r9 == May be reserved as Thread Register
202 // r11 == Frame Pointer (arm-style backtraces)
203 // r10 == Stack Limit
205 def GPR : RegisterClass<"ARM", [i32], 32, (add (sequence "R%u", 0, 12),
207 // Allocate LR as the first CSR since it is always saved anyway.
208 // For Thumb1 mode, we don't want to allocate hi regs at all, as we don't
209 // know how to spill them. If we make our prologue/epilogue code smarter at
210 // some point, we can go back to using the above allocation orders for the
211 // Thumb1 instructions that know how to use hi regs.
212 let AltOrders = [(add LR, GPR), (trunc GPR, 8)];
213 let AltOrderSelect = [{
214 return 1 + MF.getSubtarget<ARMSubtarget>().isThumb1Only();
216 let DiagnosticString = "operand must be a register in range [r0, r15]";
219 // GPRs without the PC. Some ARM instructions do not allow the PC in
220 // certain operand slots, particularly as the destination. Primarily
221 // useful for disassembly.
222 def GPRnopc : RegisterClass<"ARM", [i32], 32, (sub GPR, PC)> {
223 let AltOrders = [(add LR, GPRnopc), (trunc GPRnopc, 8)];
224 let AltOrderSelect = [{
225 return 1 + MF.getSubtarget<ARMSubtarget>().isThumb1Only();
227 let DiagnosticString = "operand must be a register in range [r0, r14]";
230 // GPRs without the PC but with APSR. Some instructions allow accessing the
231 // APSR, while actually encoding PC in the register field. This is useful
232 // for assembly and disassembly only.
233 def GPRwithAPSR : RegisterClass<"ARM", [i32], 32, (add (sub GPR, PC), APSR_NZCV)> {
234 let AltOrders = [(add LR, GPRnopc), (trunc GPRnopc, 8)];
235 let AltOrderSelect = [{
236 return 1 + MF.getSubtarget<ARMSubtarget>().isThumb1Only();
238 let DiagnosticString = "operand must be a register in range [r0, r14] or apsr_nzcv";
241 // GPRsp - Only the SP is legal. Used by Thumb1 instructions that want the
242 // implied SP argument list.
243 // FIXME: It would be better to not use this at all and refactor the
244 // instructions to not have SP an an explicit argument. That makes
245 // frame index resolution a bit trickier, though.
246 def GPRsp : RegisterClass<"ARM", [i32], 32, (add SP)> {
247 let DiagnosticString = "operand must be a register sp";
250 // restricted GPR register class. Many Thumb2 instructions allow the full
251 // register range for operands, but have undefined behaviours when PC
252 // or SP (R13 or R15) are used. The ARM ISA refers to these operands
253 // via the BadReg() pseudo-code description.
254 def rGPR : RegisterClass<"ARM", [i32], 32, (sub GPR, SP, PC)> {
255 let AltOrders = [(add LR, rGPR), (trunc rGPR, 8)];
256 let AltOrderSelect = [{
257 return 1 + MF.getSubtarget<ARMSubtarget>().isThumb1Only();
259 let DiagnosticType = "rGPR";
262 // Thumb registers are R0-R7 normally. Some instructions can still use
263 // the general GPR register class above (MOV, e.g.)
264 def tGPR : RegisterClass<"ARM", [i32], 32, (trunc GPR, 8)> {
265 let DiagnosticString = "operand must be a register in range [r0, r7]";
268 // Thumb registers R0-R7 and the PC. Some instructions like TBB or THH allow
269 // the PC to be used as a destination operand as well.
270 def tGPRwithpc : RegisterClass<"ARM", [i32], 32, (add tGPR, PC)>;
272 // The high registers in thumb mode, R8-R15.
273 def hGPR : RegisterClass<"ARM", [i32], 32, (sub GPR, tGPR)> {
274 let DiagnosticString = "operand must be a register in range [r8, r15]";
277 // For tail calls, we can't use callee-saved registers, as they are restored
278 // to the saved value before the tail call, which would clobber a call address.
279 // Note, getMinimalPhysRegClass(R0) returns tGPR because of the names of
280 // this class and the preceding one(!) This is what we want.
281 def tcGPR : RegisterClass<"ARM", [i32], 32, (add R0, R1, R2, R3, R12)> {
282 let AltOrders = [(and tcGPR, tGPR)];
283 let AltOrderSelect = [{
284 return MF.getSubtarget<ARMSubtarget>().isThumb1Only();
288 // Condition code registers.
289 def CCR : RegisterClass<"ARM", [i32], 32, (add CPSR)> {
290 let CopyCost = -1; // Don't allow copying of status registers.
291 let isAllocatable = 0;
294 // Scalar single precision floating point register class..
295 // FIXME: Allocation order changed to s0, s2, ... or s0, s4, ... as a quick hack
296 // to avoid partial-write dependencies on D or Q (depending on platform)
297 // registers (S registers are renamed as portions of D/Q registers).
298 def SPR : RegisterClass<"ARM", [f32], 32, (sequence "S%u", 0, 31)> {
299 let AltOrders = [(add (decimate SPR, 2), SPR),
300 (add (decimate SPR, 4),
302 (decimate (rotl SPR, 1), 4),
303 (decimate (rotl SPR, 1), 2))];
304 let AltOrderSelect = [{
305 return 1 + MF.getSubtarget<ARMSubtarget>().useStride4VFPs(MF);
307 let DiagnosticString = "operand must be a register in range [s0, s31]";
310 def HPR : RegisterClass<"ARM", [f16], 32, (sequence "S%u", 0, 31)> {
311 let AltOrders = [(add (decimate HPR, 2), SPR),
312 (add (decimate HPR, 4),
314 (decimate (rotl HPR, 1), 4),
315 (decimate (rotl HPR, 1), 2))];
316 let AltOrderSelect = [{
317 return 1 + MF.getSubtarget<ARMSubtarget>().useStride4VFPs(MF);
319 let DiagnosticString = "operand must be a register in range [s0, s31]";
322 // Subset of SPR which can be used as a source of NEON scalars for 16-bit
324 def SPR_8 : RegisterClass<"ARM", [f32], 32, (sequence "S%u", 0, 15)> {
325 let DiagnosticString = "operand must be a register in range [s0, s15]";
328 // Scalar double precision floating point / generic 64-bit vector register
330 // ARM requires only word alignment for double. It's more performant if it
331 // is double-word alignment though.
332 def DPR : RegisterClass<"ARM", [f64, v8i8, v4i16, v2i32, v1i64, v2f32, v4f16], 64,
333 (sequence "D%u", 0, 31)> {
334 // Allocate non-VFP2 registers D16-D31 first, and prefer even registers on
336 let AltOrders = [(rotl DPR, 16),
337 (add (decimate (rotl DPR, 16), 2), (rotl DPR, 16))];
338 let AltOrderSelect = [{
339 return 1 + MF.getSubtarget<ARMSubtarget>().useStride4VFPs(MF);
341 let DiagnosticType = "DPR";
344 // Subset of DPR that are accessible with VFP2 (and so that also have
345 // 32-bit SPR subregs).
346 def DPR_VFP2 : RegisterClass<"ARM", [f64, v8i8, v4i16, v2i32, v1i64, v2f32, v4f16], 64,
348 let DiagnosticString = "operand must be a register in range [d0, d15]";
351 // Subset of DPR which can be used as a source of NEON scalars for 16-bit
353 def DPR_8 : RegisterClass<"ARM", [f64, v8i8, v4i16, v2i32, v1i64, v2f32, v4f16], 64,
355 let DiagnosticString = "operand must be a register in range [d0, d7]";
358 // Generic 128-bit vector register class.
359 def QPR : RegisterClass<"ARM", [v16i8, v8i16, v4i32, v2i64, v4f32, v2f64, v8f16], 128,
360 (sequence "Q%u", 0, 15)> {
361 // Allocate non-VFP2 aliases Q8-Q15 first.
362 let AltOrders = [(rotl QPR, 8)];
363 let AltOrderSelect = [{ return 1; }];
364 let DiagnosticString = "operand must be a register in range [q0, q15]";
367 // Subset of QPR that have 32-bit SPR subregs.
368 def QPR_VFP2 : RegisterClass<"ARM", [v16i8, v8i16, v4i32, v2i64, v4f32, v2f64],
369 128, (trunc QPR, 8)> {
370 let DiagnosticString = "operand must be a register in range [q0, q7]";
373 // Subset of QPR that have DPR_8 and SPR_8 subregs.
374 def QPR_8 : RegisterClass<"ARM", [v16i8, v8i16, v4i32, v2i64, v4f32, v2f64],
375 128, (trunc QPR, 4)> {
376 let DiagnosticString = "operand must be a register in range [q0, q3]";
379 // Pseudo-registers representing odd-even pairs of D registers. The even-odd
380 // pairs are already represented by the Q registers.
381 // These are needed by NEON instructions requiring two consecutive D registers.
382 // There is no D31_D0 register as that is always an UNPREDICTABLE encoding.
383 def TuplesOE2D : RegisterTuples<[dsub_0, dsub_1],
384 [(decimate (shl DPR, 1), 2),
385 (decimate (shl DPR, 2), 2)]>;
387 // Register class representing a pair of consecutive D registers.
388 // Use the Q registers for the even-odd pairs.
389 def DPair : RegisterClass<"ARM", [v16i8, v8i16, v4i32, v2i64, v4f32, v2f64],
390 128, (interleave QPR, TuplesOE2D)> {
391 // Allocate starting at non-VFP2 registers D16-D31 first.
392 // Prefer even-odd pairs as they are easier to copy.
393 let AltOrders = [(add (rotl QPR, 8), (rotl DPair, 16))];
394 let AltOrderSelect = [{ return 1; }];
397 // Pseudo-registers representing even-odd pairs of GPRs from R1 to R13/SP.
398 // These are needed by instructions (e.g. ldrexd/strexd) requiring even-odd GPRs.
399 def Tuples2R : RegisterTuples<[gsub_0, gsub_1],
400 [(add R0, R2, R4, R6, R8, R10, R12),
401 (add R1, R3, R5, R7, R9, R11, SP)]>;
403 // Register class representing a pair of even-odd GPRs.
404 def GPRPair : RegisterClass<"ARM", [untyped], 64, (add Tuples2R)> {
405 let Size = 64; // 2 x 32 bits, we have no predefined type of that size.
408 // Pseudo-registers representing 3 consecutive D registers.
409 def Tuples3D : RegisterTuples<[dsub_0, dsub_1, dsub_2],
414 // 3 consecutive D registers.
415 def DTriple : RegisterClass<"ARM", [untyped], 64, (add Tuples3D)> {
416 let Size = 192; // 3 x 64 bits, we have no predefined type of that size.
419 // Pseudo 256-bit registers to represent pairs of Q registers. These should
420 // never be present in the emitted code.
421 // These are used for NEON load / store instructions, e.g., vld4, vst3.
422 def Tuples2Q : RegisterTuples<[qsub_0, qsub_1], [(shl QPR, 0), (shl QPR, 1)]>;
424 // Pseudo 256-bit vector register class to model pairs of Q registers
425 // (4 consecutive D registers).
426 def QQPR : RegisterClass<"ARM", [v4i64], 256, (add Tuples2Q)> {
427 // Allocate non-VFP2 aliases first.
428 let AltOrders = [(rotl QQPR, 8)];
429 let AltOrderSelect = [{ return 1; }];
432 // Tuples of 4 D regs that isn't also a pair of Q regs.
433 def TuplesOE4D : RegisterTuples<[dsub_0, dsub_1, dsub_2, dsub_3],
434 [(decimate (shl DPR, 1), 2),
435 (decimate (shl DPR, 2), 2),
436 (decimate (shl DPR, 3), 2),
437 (decimate (shl DPR, 4), 2)]>;
439 // 4 consecutive D registers.
440 def DQuad : RegisterClass<"ARM", [v4i64], 256,
441 (interleave Tuples2Q, TuplesOE4D)>;
443 // Pseudo 512-bit registers to represent four consecutive Q registers.
444 def Tuples2QQ : RegisterTuples<[qqsub_0, qqsub_1],
445 [(shl QQPR, 0), (shl QQPR, 2)]>;
447 // Pseudo 512-bit vector register class to model 4 consecutive Q registers
448 // (8 consecutive D registers).
449 def QQQQPR : RegisterClass<"ARM", [v8i64], 256, (add Tuples2QQ)> {
450 // Allocate non-VFP2 aliases first.
451 let AltOrders = [(rotl QQQQPR, 8)];
452 let AltOrderSelect = [{ return 1; }];
456 // Pseudo-registers representing 2-spaced consecutive D registers.
457 def Tuples2DSpc : RegisterTuples<[dsub_0, dsub_2],
461 // Spaced pairs of D registers.
462 def DPairSpc : RegisterClass<"ARM", [v2i64], 64, (add Tuples2DSpc)>;
464 def Tuples3DSpc : RegisterTuples<[dsub_0, dsub_2, dsub_4],
469 // Spaced triples of D registers.
470 def DTripleSpc : RegisterClass<"ARM", [untyped], 64, (add Tuples3DSpc)> {
471 let Size = 192; // 3 x 64 bits, we have no predefined type of that size.
474 def Tuples4DSpc : RegisterTuples<[dsub_0, dsub_2, dsub_4, dsub_6],
480 // Spaced quads of D registers.
481 def DQuadSpc : RegisterClass<"ARM", [v4i64], 64, (add Tuples3DSpc)>;