| //==- AArch64SchedA53.td - Cortex-A53 Scheduling Definitions -*- tablegen -*-=// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines the itinerary class data for the ARM Cortex A53 processors. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // ===---------------------------------------------------------------------===// |
| // The following definitions describe the simpler per-operand machine model. |
| // This works with MachineScheduler. See MCSchedule.h for details. |
| |
| // Cortex-A53 machine model for scheduling and other instruction cost heuristics. |
| def CortexA53Model : SchedMachineModel { |
| let MicroOpBufferSize = 0; // Explicitly set to zero since A53 is in-order. |
| let IssueWidth = 2; // 2 micro-ops are dispatched per cycle. |
| let LoadLatency = 3; // Optimistic load latency assuming bypass. |
| // This is overriden by OperandCycles if the |
| // Itineraries are queried instead. |
| let MispredictPenalty = 9; // Based on "Cortex-A53 Software Optimisation |
| // Specification - Instruction Timings" |
| // v 1.0 Spreadsheet |
| let CompleteModel = 1; |
| |
| list<Predicate> UnsupportedFeatures = SVEUnsupported.F; |
| } |
| |
| |
| //===----------------------------------------------------------------------===// |
| // Define each kind of processor resource and number available. |
| |
| // Modeling each pipeline as a ProcResource using the BufferSize = 0 since |
| // Cortex-A53 is in-order. |
| |
| def A53UnitALU : ProcResource<2> { let BufferSize = 0; } // Int ALU |
| def A53UnitMAC : ProcResource<1> { let BufferSize = 0; } // Int MAC |
| def A53UnitDiv : ProcResource<1> { let BufferSize = 0; } // Int Division |
| def A53UnitLdSt : ProcResource<1> { let BufferSize = 0; } // Load/Store |
| def A53UnitB : ProcResource<1> { let BufferSize = 0; } // Branch |
| def A53UnitFPALU : ProcResource<1> { let BufferSize = 0; } // FP ALU |
| def A53UnitFPMDS : ProcResource<1> { let BufferSize = 0; } // FP Mult/Div/Sqrt |
| |
| |
| //===----------------------------------------------------------------------===// |
| // Subtarget-specific SchedWrite types which both map the ProcResources and |
| // set the latency. |
| |
| let SchedModel = CortexA53Model in { |
| |
| // ALU - Despite having a full latency of 4, most of the ALU instructions can |
| // forward a cycle earlier and then two cycles earlier in the case of a |
| // shift-only instruction. These latencies will be incorrect when the |
| // result cannot be forwarded, but modeling isn't rocket surgery. |
| def : WriteRes<WriteImm, [A53UnitALU]> { let Latency = 3; } |
| def : WriteRes<WriteI, [A53UnitALU]> { let Latency = 3; } |
| def : WriteRes<WriteISReg, [A53UnitALU]> { let Latency = 3; } |
| def : WriteRes<WriteIEReg, [A53UnitALU]> { let Latency = 3; } |
| def : WriteRes<WriteIS, [A53UnitALU]> { let Latency = 2; } |
| def : WriteRes<WriteExtr, [A53UnitALU]> { let Latency = 3; } |
| |
| // MAC |
| def : WriteRes<WriteIM32, [A53UnitMAC]> { let Latency = 4; } |
| def : WriteRes<WriteIM64, [A53UnitMAC]> { let Latency = 4; } |
| |
| // Div |
| def : WriteRes<WriteID32, [A53UnitDiv]> { let Latency = 4; } |
| def : WriteRes<WriteID64, [A53UnitDiv]> { let Latency = 4; } |
| |
| // Load |
| def : WriteRes<WriteLD, [A53UnitLdSt]> { let Latency = 4; } |
| def : WriteRes<WriteLDIdx, [A53UnitLdSt]> { let Latency = 4; } |
| def : WriteRes<WriteLDHi, [A53UnitLdSt]> { let Latency = 4; } |
| |
| // Vector Load - Vector loads take 1-5 cycles to issue. For the WriteVecLd |
| // below, choosing the median of 3 which makes the latency 6. |
| // May model this more carefully in the future. The remaining |
| // A53WriteVLD# types represent the 1-5 cycle issues explicitly. |
| def : WriteRes<WriteVLD, [A53UnitLdSt]> { let Latency = 6; |
| let ResourceCycles = [3]; } |
| def A53WriteVLD1 : SchedWriteRes<[A53UnitLdSt]> { let Latency = 4; } |
| def A53WriteVLD2 : SchedWriteRes<[A53UnitLdSt]> { let Latency = 5; |
| let ResourceCycles = [2]; } |
| def A53WriteVLD3 : SchedWriteRes<[A53UnitLdSt]> { let Latency = 6; |
| let ResourceCycles = [3]; } |
| def A53WriteVLD4 : SchedWriteRes<[A53UnitLdSt]> { let Latency = 7; |
| let ResourceCycles = [4]; } |
| def A53WriteVLD5 : SchedWriteRes<[A53UnitLdSt]> { let Latency = 8; |
| let ResourceCycles = [5]; } |
| |
| // Pre/Post Indexing - Performed as part of address generation which is already |
| // accounted for in the WriteST* latencies below |
| def : WriteRes<WriteAdr, []> { let Latency = 0; } |
| |
| // Store |
| def : WriteRes<WriteST, [A53UnitLdSt]> { let Latency = 4; } |
| def : WriteRes<WriteSTP, [A53UnitLdSt]> { let Latency = 4; } |
| def : WriteRes<WriteSTIdx, [A53UnitLdSt]> { let Latency = 4; } |
| def : WriteRes<WriteSTX, [A53UnitLdSt]> { let Latency = 4; } |
| |
| // Vector Store - Similar to vector loads, can take 1-3 cycles to issue. |
| def : WriteRes<WriteVST, [A53UnitLdSt]> { let Latency = 5; |
| let ResourceCycles = [2];} |
| def A53WriteVST1 : SchedWriteRes<[A53UnitLdSt]> { let Latency = 4; } |
| def A53WriteVST2 : SchedWriteRes<[A53UnitLdSt]> { let Latency = 5; |
| let ResourceCycles = [2]; } |
| def A53WriteVST3 : SchedWriteRes<[A53UnitLdSt]> { let Latency = 6; |
| let ResourceCycles = [3]; } |
| |
| def : WriteRes<WriteAtomic, []> { let Unsupported = 1; } |
| |
| // Branch |
| def : WriteRes<WriteBr, [A53UnitB]>; |
| def : WriteRes<WriteBrReg, [A53UnitB]>; |
| def : WriteRes<WriteSys, [A53UnitB]>; |
| def : WriteRes<WriteBarrier, [A53UnitB]>; |
| def : WriteRes<WriteHint, [A53UnitB]>; |
| |
| // FP ALU |
| def : WriteRes<WriteF, [A53UnitFPALU]> { let Latency = 6; } |
| def : WriteRes<WriteFCmp, [A53UnitFPALU]> { let Latency = 6; } |
| def : WriteRes<WriteFCvt, [A53UnitFPALU]> { let Latency = 6; } |
| def : WriteRes<WriteFCopy, [A53UnitFPALU]> { let Latency = 6; } |
| def : WriteRes<WriteFImm, [A53UnitFPALU]> { let Latency = 6; } |
| def : WriteRes<WriteV, [A53UnitFPALU]> { let Latency = 6; } |
| |
| // FP Mul, Div, Sqrt |
| def : WriteRes<WriteFMul, [A53UnitFPMDS]> { let Latency = 6; } |
| def : WriteRes<WriteFDiv, [A53UnitFPMDS]> { let Latency = 33; |
| let ResourceCycles = [29]; } |
| def A53WriteFMAC : SchedWriteRes<[A53UnitFPMDS]> { let Latency = 10; } |
| def A53WriteFDivSP : SchedWriteRes<[A53UnitFPMDS]> { let Latency = 18; |
| let ResourceCycles = [14]; } |
| def A53WriteFDivDP : SchedWriteRes<[A53UnitFPMDS]> { let Latency = 33; |
| let ResourceCycles = [29]; } |
| def A53WriteFSqrtSP : SchedWriteRes<[A53UnitFPMDS]> { let Latency = 17; |
| let ResourceCycles = [13]; } |
| def A53WriteFSqrtDP : SchedWriteRes<[A53UnitFPMDS]> { let Latency = 32; |
| let ResourceCycles = [28]; } |
| |
| //===----------------------------------------------------------------------===// |
| // Subtarget-specific SchedRead types. |
| |
| // No forwarding for these reads. |
| def : ReadAdvance<ReadExtrHi, 0>; |
| def : ReadAdvance<ReadAdrBase, 0>; |
| def : ReadAdvance<ReadVLD, 0>; |
| |
| // ALU - Most operands in the ALU pipes are not needed for two cycles. Shiftable |
| // operands are needed one cycle later if and only if they are to be |
| // shifted. Otherwise, they too are needed two cycles later. This same |
| // ReadAdvance applies to Extended registers as well, even though there is |
| // a separate SchedPredicate for them. |
| def : ReadAdvance<ReadI, 2, [WriteImm,WriteI, |
| WriteISReg, WriteIEReg,WriteIS, |
| WriteID32,WriteID64, |
| WriteIM32,WriteIM64]>; |
| def A53ReadShifted : SchedReadAdvance<1, [WriteImm,WriteI, |
| WriteISReg, WriteIEReg,WriteIS, |
| WriteID32,WriteID64, |
| WriteIM32,WriteIM64]>; |
| def A53ReadNotShifted : SchedReadAdvance<2, [WriteImm,WriteI, |
| WriteISReg, WriteIEReg,WriteIS, |
| WriteID32,WriteID64, |
| WriteIM32,WriteIM64]>; |
| def A53ReadISReg : SchedReadVariant<[ |
| SchedVar<RegShiftedPred, [A53ReadShifted]>, |
| SchedVar<NoSchedPred, [A53ReadNotShifted]>]>; |
| def : SchedAlias<ReadISReg, A53ReadISReg>; |
| |
| def A53ReadIEReg : SchedReadVariant<[ |
| SchedVar<RegExtendedPred, [A53ReadShifted]>, |
| SchedVar<NoSchedPred, [A53ReadNotShifted]>]>; |
| def : SchedAlias<ReadIEReg, A53ReadIEReg>; |
| |
| // MAC - Operands are generally needed one cycle later in the MAC pipe. |
| // Accumulator operands are needed two cycles later. |
| def : ReadAdvance<ReadIM, 1, [WriteImm,WriteI, |
| WriteISReg, WriteIEReg,WriteIS, |
| WriteID32,WriteID64, |
| WriteIM32,WriteIM64]>; |
| def : ReadAdvance<ReadIMA, 2, [WriteImm,WriteI, |
| WriteISReg, WriteIEReg,WriteIS, |
| WriteID32,WriteID64, |
| WriteIM32,WriteIM64]>; |
| |
| // Div |
| def : ReadAdvance<ReadID, 1, [WriteImm,WriteI, |
| WriteISReg, WriteIEReg,WriteIS, |
| WriteID32,WriteID64, |
| WriteIM32,WriteIM64]>; |
| |
| //===----------------------------------------------------------------------===// |
| // Subtarget-specific InstRWs. |
| |
| //--- |
| // Miscellaneous |
| //--- |
| def : InstRW<[WriteI], (instrs COPY)>; |
| |
| //--- |
| // Vector Loads |
| //--- |
| def : InstRW<[A53WriteVLD1], (instregex "LD1i(8|16|32|64)$")>; |
| def : InstRW<[A53WriteVLD1], (instregex "LD1Rv(8b|4h|2s|1d|16b|8h|4s|2d)$")>; |
| def : InstRW<[A53WriteVLD1], (instregex "LD1Onev(8b|4h|2s|1d|16b|8h|4s|2d)$")>; |
| def : InstRW<[A53WriteVLD2], (instregex "LD1Twov(8b|4h|2s|1d|16b|8h|4s|2d)$")>; |
| def : InstRW<[A53WriteVLD3], (instregex "LD1Threev(8b|4h|2s|1d|16b|8h|4s|2d)$")>; |
| def : InstRW<[A53WriteVLD4], (instregex "LD1Fourv(8b|4h|2s|1d|16b|8h|4s|2d)$")>; |
| def : InstRW<[A53WriteVLD1, WriteAdr], (instregex "LD1i(8|16|32|64)_POST$")>; |
| def : InstRW<[A53WriteVLD1, WriteAdr], (instregex "LD1Rv(8b|4h|2s|1d|16b|8h|4s|2d)_POST$")>; |
| def : InstRW<[A53WriteVLD1, WriteAdr], (instregex "LD1Onev(8b|4h|2s|1d|16b|8h|4s|2d)_POST$")>; |
| def : InstRW<[A53WriteVLD2, WriteAdr], (instregex "LD1Twov(8b|4h|2s|1d|16b|8h|4s|2d)_POST$")>; |
| def : InstRW<[A53WriteVLD3, WriteAdr], (instregex "LD1Threev(8b|4h|2s|1d|16b|8h|4s|2d)_POST$")>; |
| def : InstRW<[A53WriteVLD4, WriteAdr], (instregex "LD1Fourv(8b|4h|2s|1d|16b|8h|4s|2d)_POST$")>; |
| |
| def : InstRW<[A53WriteVLD1], (instregex "LD2i(8|16|32|64)$")>; |
| def : InstRW<[A53WriteVLD1], (instregex "LD2Rv(8b|4h|2s|1d|16b|8h|4s|2d)$")>; |
| def : InstRW<[A53WriteVLD2], (instregex "LD2Twov(8b|4h|2s)$")>; |
| def : InstRW<[A53WriteVLD4], (instregex "LD2Twov(16b|8h|4s|2d)$")>; |
| def : InstRW<[A53WriteVLD1, WriteAdr], (instregex "LD2i(8|16|32|64)_POST$")>; |
| def : InstRW<[A53WriteVLD1, WriteAdr], (instregex "LD2Rv(8b|4h|2s|1d|16b|8h|4s|2d)_POST$")>; |
| def : InstRW<[A53WriteVLD2, WriteAdr], (instregex "LD2Twov(8b|4h|2s)_POST$")>; |
| def : InstRW<[A53WriteVLD4, WriteAdr], (instregex "LD2Twov(16b|8h|4s|2d)_POST$")>; |
| |
| def : InstRW<[A53WriteVLD2], (instregex "LD3i(8|16|32|64)$")>; |
| def : InstRW<[A53WriteVLD2], (instregex "LD3Rv(8b|4h|2s|1d|16b|8h|4s|2d)$")>; |
| def : InstRW<[A53WriteVLD4], (instregex "LD3Threev(8b|4h|2s|1d|16b|8h|4s)$")>; |
| def : InstRW<[A53WriteVLD3], (instregex "LD3Threev2d$")>; |
| def : InstRW<[A53WriteVLD2, WriteAdr], (instregex "LD3i(8|16|32|64)_POST$")>; |
| def : InstRW<[A53WriteVLD2, WriteAdr], (instregex "LD3Rv(8b|4h|2s|1d|16b|8h|4s|2d)_POST$")>; |
| def : InstRW<[A53WriteVLD4, WriteAdr], (instregex "LD3Threev(8b|4h|2s|1d|16b|8h|4s)_POST$")>; |
| def : InstRW<[A53WriteVLD3, WriteAdr], (instregex "LD3Threev2d_POST$")>; |
| |
| def : InstRW<[A53WriteVLD2], (instregex "LD4i(8|16|32|64)$")>; |
| def : InstRW<[A53WriteVLD2], (instregex "LD4Rv(8b|4h|2s|1d|16b|8h|4s|2d)$")>; |
| def : InstRW<[A53WriteVLD5], (instregex "LD4Fourv(8b|4h|2s|1d|16b|8h|4s)$")>; |
| def : InstRW<[A53WriteVLD4], (instregex "LD4Fourv(2d)$")>; |
| def : InstRW<[A53WriteVLD2, WriteAdr], (instregex "LD4i(8|16|32|64)_POST$")>; |
| def : InstRW<[A53WriteVLD2, WriteAdr], (instregex "LD4Rv(8b|4h|2s|1d|16b|8h|4s|2d)_POST$")>; |
| def : InstRW<[A53WriteVLD5, WriteAdr], (instregex "LD4Fourv(8b|4h|2s|1d|16b|8h|4s)_POST$")>; |
| def : InstRW<[A53WriteVLD4, WriteAdr], (instregex "LD4Fourv(2d)_POST$")>; |
| |
| //--- |
| // Vector Stores |
| //--- |
| def : InstRW<[A53WriteVST1], (instregex "ST1i(8|16|32|64)$")>; |
| def : InstRW<[A53WriteVST1], (instregex "ST1Onev(8b|4h|2s|1d|16b|8h|4s|2d)$")>; |
| def : InstRW<[A53WriteVST1], (instregex "ST1Twov(8b|4h|2s|1d|16b|8h|4s|2d)$")>; |
| def : InstRW<[A53WriteVST2], (instregex "ST1Threev(8b|4h|2s|1d|16b|8h|4s|2d)$")>; |
| def : InstRW<[A53WriteVST2], (instregex "ST1Fourv(8b|4h|2s|1d|16b|8h|4s|2d)$")>; |
| def : InstRW<[A53WriteVST1, WriteAdr], (instregex "ST1i(8|16|32|64)_POST$")>; |
| def : InstRW<[A53WriteVST1, WriteAdr], (instregex "ST1Onev(8b|4h|2s|1d|16b|8h|4s|2d)_POST$")>; |
| def : InstRW<[A53WriteVST1, WriteAdr], (instregex "ST1Twov(8b|4h|2s|1d|16b|8h|4s|2d)_POST$")>; |
| def : InstRW<[A53WriteVST2, WriteAdr], (instregex "ST1Threev(8b|4h|2s|1d|16b|8h|4s|2d)_POST$")>; |
| def : InstRW<[A53WriteVST2, WriteAdr], (instregex "ST1Fourv(8b|4h|2s|1d|16b|8h|4s|2d)_POST$")>; |
| |
| def : InstRW<[A53WriteVST1], (instregex "ST2i(8|16|32|64)$")>; |
| def : InstRW<[A53WriteVST1], (instregex "ST2Twov(8b|4h|2s)$")>; |
| def : InstRW<[A53WriteVST2], (instregex "ST2Twov(16b|8h|4s|2d)$")>; |
| def : InstRW<[A53WriteVST1, WriteAdr], (instregex "ST2i(8|16|32|64)_POST$")>; |
| def : InstRW<[A53WriteVST1, WriteAdr], (instregex "ST2Twov(8b|4h|2s)_POST$")>; |
| def : InstRW<[A53WriteVST2, WriteAdr], (instregex "ST2Twov(16b|8h|4s|2d)_POST$")>; |
| |
| def : InstRW<[A53WriteVST2], (instregex "ST3i(8|16|32|64)$")>; |
| def : InstRW<[A53WriteVST3], (instregex "ST3Threev(8b|4h|2s|1d|16b|8h|4s)$")>; |
| def : InstRW<[A53WriteVST2], (instregex "ST3Threev(2d)$")>; |
| def : InstRW<[A53WriteVST2, WriteAdr], (instregex "ST3i(8|16|32|64)_POST$")>; |
| def : InstRW<[A53WriteVST3, WriteAdr], (instregex "ST3Threev(8b|4h|2s|1d|16b|8h|4s)_POST$")>; |
| def : InstRW<[A53WriteVST2, WriteAdr], (instregex "ST3Threev(2d)_POST$")>; |
| |
| def : InstRW<[A53WriteVST2], (instregex "ST4i(8|16|32|64)$")>; |
| def : InstRW<[A53WriteVST3], (instregex "ST4Fourv(8b|4h|2s|1d|16b|8h|4s)$")>; |
| def : InstRW<[A53WriteVST2], (instregex "ST4Fourv(2d)$")>; |
| def : InstRW<[A53WriteVST2, WriteAdr], (instregex "ST4i(8|16|32|64)_POST$")>; |
| def : InstRW<[A53WriteVST3, WriteAdr], (instregex "ST4Fourv(8b|4h|2s|1d|16b|8h|4s)_POST$")>; |
| def : InstRW<[A53WriteVST2, WriteAdr], (instregex "ST4Fourv(2d)_POST$")>; |
| |
| //--- |
| // Floating Point MAC, DIV, SQRT |
| //--- |
| def : InstRW<[A53WriteFMAC], (instregex "^FN?M(ADD|SUB).*")>; |
| def : InstRW<[A53WriteFMAC], (instregex "^FML(A|S).*")>; |
| def : InstRW<[A53WriteFDivSP], (instrs FDIVSrr)>; |
| def : InstRW<[A53WriteFDivDP], (instrs FDIVDrr)>; |
| def : InstRW<[A53WriteFDivSP], (instregex "^FDIVv.*32$")>; |
| def : InstRW<[A53WriteFDivDP], (instregex "^FDIVv.*64$")>; |
| def : InstRW<[A53WriteFSqrtSP], (instregex "^.*SQRT.*32$")>; |
| def : InstRW<[A53WriteFSqrtDP], (instregex "^.*SQRT.*64$")>; |
| |
| } |
