1 //==- AArch64SchedThunderX.td - Cavium ThunderX T8X Scheduling Definitions -*- tablegen -*-=//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // This file defines the itinerary class data for the ARM ThunderX T8X
10 // (T88, T81, T83) processors.
11 // Loosely based on Cortex-A53 which is somewhat similar.
13 //===----------------------------------------------------------------------===//
15 // ===---------------------------------------------------------------------===//
16 // The following definitions describe the simpler per-operand machine model.
17 // This works with MachineScheduler. See llvm/MC/MCSchedule.h for details.
19 // Cavium ThunderX T8X scheduling machine model.
20 def ThunderXT8XModel : SchedMachineModel {
21 let IssueWidth = 2; // 2 micro-ops dispatched per cycle.
22 let MicroOpBufferSize = 0; // ThunderX T88/T81/T83 are in-order.
23 let LoadLatency = 3; // Optimistic load latency.
24 let MispredictPenalty = 8; // Branch mispredict penalty.
25 let PostRAScheduler = 1; // Use PostRA scheduler.
26 let CompleteModel = 1;
28 list<Predicate> UnsupportedFeatures = !listconcat(SVEUnsupported.F,
31 // FIXME: Remove when all errors have been fixed.
32 let FullInstRWOverlapCheck = 0;
35 // Modeling each pipeline with BufferSize == 0 since T8X is in-order.
36 def THXT8XUnitALU : ProcResource<2> { let BufferSize = 0; } // Int ALU
37 def THXT8XUnitMAC : ProcResource<1> { let BufferSize = 0; } // Int MAC
38 def THXT8XUnitDiv : ProcResource<1> { let BufferSize = 0; } // Int Division
39 def THXT8XUnitLdSt : ProcResource<1> { let BufferSize = 0; } // Load/Store
40 def THXT8XUnitBr : ProcResource<1> { let BufferSize = 0; } // Branch
41 def THXT8XUnitFPALU : ProcResource<1> { let BufferSize = 0; } // FP ALU
42 def THXT8XUnitFPMDS : ProcResource<1> { let BufferSize = 0; } // FP Mul/Div/Sqrt
44 //===----------------------------------------------------------------------===//
45 // Subtarget-specific SchedWrite types mapping the ProcResources and
48 let SchedModel = ThunderXT8XModel in {
51 def : WriteRes<WriteImm, [THXT8XUnitALU]> { let Latency = 1; }
52 def : WriteRes<WriteI, [THXT8XUnitALU]> { let Latency = 1; }
53 def : WriteRes<WriteISReg, [THXT8XUnitALU]> { let Latency = 2; }
54 def : WriteRes<WriteIEReg, [THXT8XUnitALU]> { let Latency = 2; }
55 def : WriteRes<WriteIS, [THXT8XUnitALU]> { let Latency = 2; }
56 def : WriteRes<WriteExtr, [THXT8XUnitALU]> { let Latency = 2; }
59 def : WriteRes<WriteIM32, [THXT8XUnitMAC]> {
61 let ResourceCycles = [1];
64 def : WriteRes<WriteIM64, [THXT8XUnitMAC]> {
66 let ResourceCycles = [1];
70 def : WriteRes<WriteID32, [THXT8XUnitDiv]> {
72 let ResourceCycles = [6];
75 def : WriteRes<WriteID64, [THXT8XUnitDiv]> {
77 let ResourceCycles = [8];
81 def : WriteRes<WriteLD, [THXT8XUnitLdSt]> { let Latency = 3; }
82 def : WriteRes<WriteLDIdx, [THXT8XUnitLdSt]> { let Latency = 3; }
83 def : WriteRes<WriteLDHi, [THXT8XUnitLdSt]> { let Latency = 3; }
86 def : WriteRes<WriteVLD, [THXT8XUnitLdSt]> {
88 let ResourceCycles = [3];
91 def THXT8XWriteVLD1 : SchedWriteRes<[THXT8XUnitLdSt]> {
93 let ResourceCycles = [1];
96 def THXT8XWriteVLD2 : SchedWriteRes<[THXT8XUnitLdSt]> {
98 let ResourceCycles = [7];
101 def THXT8XWriteVLD3 : SchedWriteRes<[THXT8XUnitLdSt]> {
103 let ResourceCycles = [8];
106 def THXT8XWriteVLD4 : SchedWriteRes<[THXT8XUnitLdSt]> {
108 let ResourceCycles = [9];
111 def THXT8XWriteVLD5 : SchedWriteRes<[THXT8XUnitLdSt]> {
113 let ResourceCycles = [9];
117 def : WriteRes<WriteAdr, []> { let Latency = 0; }
120 def : WriteRes<WriteST, [THXT8XUnitLdSt]> { let Latency = 1; }
121 def : WriteRes<WriteSTP, [THXT8XUnitLdSt]> { let Latency = 1; }
122 def : WriteRes<WriteSTIdx, [THXT8XUnitLdSt]> { let Latency = 1; }
123 def : WriteRes<WriteSTX, [THXT8XUnitLdSt]> { let Latency = 1; }
126 def : WriteRes<WriteVST, [THXT8XUnitLdSt]>;
127 def THXT8XWriteVST1 : SchedWriteRes<[THXT8XUnitLdSt]>;
129 def THXT8XWriteVST2 : SchedWriteRes<[THXT8XUnitLdSt]> {
131 let ResourceCycles = [9];
134 def THXT8XWriteVST3 : SchedWriteRes<[THXT8XUnitLdSt]> {
136 let ResourceCycles = [10];
139 def : WriteRes<WriteAtomic, []> { let Unsupported = 1; }
142 def : WriteRes<WriteBr, [THXT8XUnitBr]>;
143 def THXT8XWriteBR : SchedWriteRes<[THXT8XUnitBr]>;
144 def : WriteRes<WriteBrReg, [THXT8XUnitBr]>;
145 def THXT8XWriteBRR : SchedWriteRes<[THXT8XUnitBr]>;
146 def THXT8XWriteRET : SchedWriteRes<[THXT8XUnitALU]>;
147 def : WriteRes<WriteSys, [THXT8XUnitBr]>;
148 def : WriteRes<WriteBarrier, [THXT8XUnitBr]>;
149 def : WriteRes<WriteHint, [THXT8XUnitBr]>;
152 def : WriteRes<WriteF, [THXT8XUnitFPALU]> { let Latency = 6; }
153 def : WriteRes<WriteFCmp, [THXT8XUnitFPALU]> { let Latency = 6; }
154 def : WriteRes<WriteFCvt, [THXT8XUnitFPALU]> { let Latency = 6; }
155 def : WriteRes<WriteFCopy, [THXT8XUnitFPALU]> { let Latency = 6; }
156 def : WriteRes<WriteFImm, [THXT8XUnitFPALU]> { let Latency = 6; }
157 def : WriteRes<WriteVd, [THXT8XUnitFPALU]> { let Latency = 6; }
158 def : WriteRes<WriteVq, [THXT8XUnitFPALU]> { let Latency = 6; }
161 def : WriteRes<WriteFMul, [THXT8XUnitFPMDS]> { let Latency = 6; }
162 def : WriteRes<WriteFDiv, [THXT8XUnitFPMDS]> {
164 let ResourceCycles = [19];
167 def THXT8XWriteFMAC : SchedWriteRes<[THXT8XUnitFPMDS]> { let Latency = 10; }
169 def THXT8XWriteFDivSP : SchedWriteRes<[THXT8XUnitFPMDS]> {
171 let ResourceCycles = [9];
174 def THXT8XWriteFDivDP : SchedWriteRes<[THXT8XUnitFPMDS]> {
176 let ResourceCycles = [19];
179 def THXT8XWriteFSqrtSP : SchedWriteRes<[THXT8XUnitFPMDS]> {
181 let ResourceCycles = [14];
184 def THXT8XWriteFSqrtDP : SchedWriteRes<[THXT8XUnitFPMDS]> {
186 let ResourceCycles = [28];
189 //===----------------------------------------------------------------------===//
190 // Subtarget-specific SchedRead types.
192 // No forwarding for these reads.
193 def : ReadAdvance<ReadExtrHi, 1>;
194 def : ReadAdvance<ReadAdrBase, 2>;
195 def : ReadAdvance<ReadVLD, 2>;
196 def : ReadAdvance<ReadST, 2>;
198 // FIXME: This needs more targeted benchmarking.
199 // ALU - Most operands in the ALU pipes are not needed for two cycles. Shiftable
200 // operands are needed one cycle later if and only if they are to be
201 // shifted. Otherwise, they too are needed two cycles later. This same
202 // ReadAdvance applies to Extended registers as well, even though there is
203 // a separate SchedPredicate for them.
204 def : ReadAdvance<ReadI, 2, [WriteImm, WriteI,
205 WriteISReg, WriteIEReg, WriteIS,
206 WriteID32, WriteID64,
207 WriteIM32, WriteIM64]>;
208 def THXT8XReadShifted : SchedReadAdvance<1, [WriteImm, WriteI,
209 WriteISReg, WriteIEReg, WriteIS,
210 WriteID32, WriteID64,
211 WriteIM32, WriteIM64]>;
212 def THXT8XReadNotShifted : SchedReadAdvance<2, [WriteImm, WriteI,
213 WriteISReg, WriteIEReg, WriteIS,
214 WriteID32, WriteID64,
215 WriteIM32, WriteIM64]>;
216 def THXT8XReadISReg : SchedReadVariant<[
217 SchedVar<RegShiftedPred, [THXT8XReadShifted]>,
218 SchedVar<NoSchedPred, [THXT8XReadNotShifted]>]>;
219 def : SchedAlias<ReadISReg, THXT8XReadISReg>;
221 def THXT8XReadIEReg : SchedReadVariant<[
222 SchedVar<RegExtendedPred, [THXT8XReadShifted]>,
223 SchedVar<NoSchedPred, [THXT8XReadNotShifted]>]>;
224 def : SchedAlias<ReadIEReg, THXT8XReadIEReg>;
226 // MAC - Operands are generally needed one cycle later in the MAC pipe.
227 // Accumulator operands are needed two cycles later.
228 def : ReadAdvance<ReadIM, 1, [WriteImm,WriteI,
229 WriteISReg, WriteIEReg, WriteIS,
230 WriteID32, WriteID64,
231 WriteIM32, WriteIM64]>;
232 def : ReadAdvance<ReadIMA, 2, [WriteImm, WriteI,
233 WriteISReg, WriteIEReg, WriteIS,
234 WriteID32, WriteID64,
235 WriteIM32, WriteIM64]>;
238 def : ReadAdvance<ReadID, 1, [WriteImm, WriteI,
239 WriteISReg, WriteIEReg, WriteIS,
240 WriteID32, WriteID64,
241 WriteIM32, WriteIM64]>;
243 //===----------------------------------------------------------------------===//
244 // Subtarget-specific InstRW.
249 def : InstRW<[THXT8XWriteBR], (instregex "^B$")>;
250 def : InstRW<[THXT8XWriteBR], (instregex "^BL$")>;
251 def : InstRW<[THXT8XWriteBR], (instregex "^B..$")>;
252 def : InstRW<[THXT8XWriteBR], (instregex "^CBNZ")>;
253 def : InstRW<[THXT8XWriteBR], (instregex "^CBZ")>;
254 def : InstRW<[THXT8XWriteBR], (instregex "^TBNZ")>;
255 def : InstRW<[THXT8XWriteBR], (instregex "^TBZ")>;
256 def : InstRW<[THXT8XWriteBRR], (instregex "^BR$")>;
257 def : InstRW<[THXT8XWriteBRR], (instregex "^BLR$")>;
262 def : InstRW<[THXT8XWriteRET], (instregex "^RET$")>;
267 def : InstRW<[WriteI], (instrs COPY)>;
272 def : InstRW<[THXT8XWriteVLD1], (instregex "LD1i(8|16|32|64)$")>;
273 def : InstRW<[THXT8XWriteVLD1], (instregex "LD1Rv(8b|4h|2s|1d|16b|8h|4s|2d)$")>;
274 def : InstRW<[THXT8XWriteVLD1], (instregex "LD1Onev(8b|4h|2s|1d|16b|8h|4s|2d)$")>;
275 def : InstRW<[THXT8XWriteVLD2], (instregex "LD1Twov(8b|4h|2s|1d|16b|8h|4s|2d)$")>;
276 def : InstRW<[THXT8XWriteVLD3], (instregex "LD1Threev(8b|4h|2s|1d|16b|8h|4s|2d)$")>;
277 def : InstRW<[THXT8XWriteVLD4], (instregex "LD1Fourv(8b|4h|2s|1d|16b|8h|4s|2d)$")>;
278 def : InstRW<[THXT8XWriteVLD1, WriteAdr], (instregex "LD1i(8|16|32|64)_POST$")>;
279 def : InstRW<[THXT8XWriteVLD1, WriteAdr], (instregex "LD1Rv(8b|4h|2s|1d|16b|8h|4s|2d)_POST$")>;
280 def : InstRW<[THXT8XWriteVLD1, WriteAdr], (instregex "LD1Onev(8b|4h|2s|1d|16b|8h|4s|2d)_POST$")>;
281 def : InstRW<[THXT8XWriteVLD2, WriteAdr], (instregex "LD1Twov(8b|4h|2s|1d|16b|8h|4s|2d)_POST$")>;
282 def : InstRW<[THXT8XWriteVLD3, WriteAdr], (instregex "LD1Threev(8b|4h|2s|1d|16b|8h|4s|2d)_POST$")>;
283 def : InstRW<[THXT8XWriteVLD4, WriteAdr], (instregex "LD1Fourv(8b|4h|2s|1d|16b|8h|4s|2d)_POST$")>;
285 def : InstRW<[THXT8XWriteVLD1], (instregex "LD2i(8|16|32|64)$")>;
286 def : InstRW<[THXT8XWriteVLD1], (instregex "LD2Rv(8b|4h|2s|1d|16b|8h|4s|2d)$")>;
287 def : InstRW<[THXT8XWriteVLD2], (instregex "LD2Twov(8b|4h|2s)$")>;
288 def : InstRW<[THXT8XWriteVLD4], (instregex "LD2Twov(16b|8h|4s|2d)$")>;
289 def : InstRW<[THXT8XWriteVLD1, WriteAdr], (instregex "LD2i(8|16|32|64)(_POST)?$")>;
290 def : InstRW<[THXT8XWriteVLD1, WriteAdr], (instregex "LD2Rv(8b|4h|2s|1d|16b|8h|4s|2d)(_POST)?$")>;
291 def : InstRW<[THXT8XWriteVLD2, WriteAdr], (instregex "LD2Twov(8b|4h|2s)(_POST)?$")>;
292 def : InstRW<[THXT8XWriteVLD4, WriteAdr], (instregex "LD2Twov(16b|8h|4s|2d)(_POST)?$")>;
294 def : InstRW<[THXT8XWriteVLD2], (instregex "LD3i(8|16|32|64)$")>;
295 def : InstRW<[THXT8XWriteVLD2], (instregex "LD3Rv(8b|4h|2s|1d|16b|8h|4s|2d)$")>;
296 def : InstRW<[THXT8XWriteVLD4], (instregex "LD3Threev(8b|4h|2s|1d|16b|8h|4s)$")>;
297 def : InstRW<[THXT8XWriteVLD3], (instregex "LD3Threev(2d)$")>;
298 def : InstRW<[THXT8XWriteVLD2, WriteAdr], (instregex "LD3i(8|16|32|64)_POST$")>;
299 def : InstRW<[THXT8XWriteVLD2, WriteAdr], (instregex "LD3Rv(8b|4h|2s|1d|16b|8h|4s|2d)_POST$")>;
300 def : InstRW<[THXT8XWriteVLD4, WriteAdr], (instregex "LD3Threev(8b|4h|2s|1d|16b|8h|4s)_POST$")>;
301 def : InstRW<[THXT8XWriteVLD3, WriteAdr], (instregex "LD3Threev(2d)_POST$")>;
303 def : InstRW<[THXT8XWriteVLD2], (instregex "LD4i(8|16|32|64)$")>;
304 def : InstRW<[THXT8XWriteVLD2], (instregex "LD4Rv(8b|4h|2s|1d|16b|8h|4s|2d)$")>;
305 def : InstRW<[THXT8XWriteVLD5], (instregex "LD4Fourv(8b|4h|2s|1d|16b|8h|4s)$")>;
306 def : InstRW<[THXT8XWriteVLD4], (instregex "LD4Fourv(2d)$")>;
307 def : InstRW<[THXT8XWriteVLD2, WriteAdr], (instregex "LD4i(8|16|32|64)_POST$")>;
308 def : InstRW<[THXT8XWriteVLD2, WriteAdr], (instregex "LD4Rv(8b|4h|2s|1d|16b|8h|4s|2d)_POST$")>;
309 def : InstRW<[THXT8XWriteVLD5, WriteAdr], (instregex "LD4Fourv(8b|4h|2s|1d|16b|8h|4s)_POST$")>;
310 def : InstRW<[THXT8XWriteVLD4, WriteAdr], (instregex "LD4Fourv(2d)_POST$")>;
315 def : InstRW<[THXT8XWriteVST1], (instregex "ST1i(8|16|32|64)$")>;
316 def : InstRW<[THXT8XWriteVST1], (instregex "ST1Onev(8b|4h|2s|1d|16b|8h|4s|2d)$")>;
317 def : InstRW<[THXT8XWriteVST1], (instregex "ST1Twov(8b|4h|2s|1d|16b|8h|4s|2d)$")>;
318 def : InstRW<[THXT8XWriteVST2], (instregex "ST1Threev(8b|4h|2s|1d|16b|8h|4s|2d)$")>;
319 def : InstRW<[THXT8XWriteVST2], (instregex "ST1Fourv(8b|4h|2s|1d|16b|8h|4s|2d)$")>;
320 def : InstRW<[THXT8XWriteVST1, WriteAdr], (instregex "ST1i(8|16|32|64)_POST$")>;
321 def : InstRW<[THXT8XWriteVST1, WriteAdr], (instregex "ST1Onev(8b|4h|2s|1d|16b|8h|4s|2d)_POST$")>;
322 def : InstRW<[THXT8XWriteVST1, WriteAdr], (instregex "ST1Twov(8b|4h|2s|1d|16b|8h|4s|2d)_POST$")>;
323 def : InstRW<[THXT8XWriteVST2, WriteAdr], (instregex "ST1Threev(8b|4h|2s|1d|16b|8h|4s|2d)_POST$")>;
324 def : InstRW<[THXT8XWriteVST2, WriteAdr], (instregex "ST1Fourv(8b|4h|2s|1d|16b|8h|4s|2d)_POST$")>;
326 def : InstRW<[THXT8XWriteVST1], (instregex "ST2i(8|16|32|64)$")>;
327 def : InstRW<[THXT8XWriteVST1], (instregex "ST2Twov(8b|4h|2s)$")>;
328 def : InstRW<[THXT8XWriteVST2], (instregex "ST2Twov(16b|8h|4s|2d)$")>;
329 def : InstRW<[THXT8XWriteVST1, WriteAdr], (instregex "ST2i(8|16|32|64)_POST$")>;
330 def : InstRW<[THXT8XWriteVST1, WriteAdr], (instregex "ST2Twov(8b|4h|2s)_POST$")>;
331 def : InstRW<[THXT8XWriteVST2, WriteAdr], (instregex "ST2Twov(16b|8h|4s|2d)_POST$")>;
333 def : InstRW<[THXT8XWriteVST2], (instregex "ST3i(8|16|32|64)$")>;
334 def : InstRW<[THXT8XWriteVST3], (instregex "ST3Threev(8b|4h|2s|1d|16b|8h|4s)$")>;
335 def : InstRW<[THXT8XWriteVST2], (instregex "ST3Threev(2d)$")>;
336 def : InstRW<[THXT8XWriteVST2, WriteAdr], (instregex "ST3i(8|16|32|64)_POST$")>;
337 def : InstRW<[THXT8XWriteVST3, WriteAdr], (instregex "ST3Threev(8b|4h|2s|1d|16b|8h|4s)_POST$")>;
338 def : InstRW<[THXT8XWriteVST2, WriteAdr], (instregex "ST3Threev(2d)_POST$")>;
340 def : InstRW<[THXT8XWriteVST2], (instregex "ST4i(8|16|32|64)$")>;
341 def : InstRW<[THXT8XWriteVST3], (instregex "ST4Fourv(8b|4h|2s|1d|16b|8h|4s)$")>;
342 def : InstRW<[THXT8XWriteVST2], (instregex "ST4Fourv(2d)$")>;
343 def : InstRW<[THXT8XWriteVST2, WriteAdr], (instregex "ST4i(8|16|32|64)_POST$")>;
344 def : InstRW<[THXT8XWriteVST3, WriteAdr], (instregex "ST4Fourv(8b|4h|2s|1d|16b|8h|4s)_POST$")>;
345 def : InstRW<[THXT8XWriteVST2, WriteAdr], (instregex "ST4Fourv(2d)_POST$")>;
348 // Floating Point MAC, DIV, SQRT
350 def : InstRW<[THXT8XWriteFMAC], (instregex "^FN?M(ADD|SUB).*")>;
351 def : InstRW<[THXT8XWriteFMAC], (instregex "^FML(A|S).*")>;
352 def : InstRW<[THXT8XWriteFDivSP], (instrs FDIVSrr)>;
353 def : InstRW<[THXT8XWriteFDivDP], (instrs FDIVDrr)>;
354 def : InstRW<[THXT8XWriteFDivSP], (instregex "^FDIVv.*32$")>;
355 def : InstRW<[THXT8XWriteFDivDP], (instregex "^FDIVv.*64$")>;
356 def : InstRW<[THXT8XWriteFSqrtSP], (instregex "^.*SQRT.*32$")>;
357 def : InstRW<[THXT8XWriteFSqrtDP], (instregex "^.*SQRT.*64$")>;