| //===-- PPCScheduleP7.td - PPC P7 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 POWER7 processor. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // Primary reference: |
| // IBM POWER7 multicore server processor |
| // B. Sinharoy, et al. |
| // IBM J. Res. & Dev. (55) 3. May/June 2011. |
| |
| // Scheduling for the P7 involves tracking two types of resources: |
| // 1. The dispatch bundle slots |
| // 2. The functional unit resources |
| |
| // Dispatch units: |
| def P7_DU1 : FuncUnit; |
| def P7_DU2 : FuncUnit; |
| def P7_DU3 : FuncUnit; |
| def P7_DU4 : FuncUnit; |
| def P7_DU5 : FuncUnit; |
| def P7_DU6 : FuncUnit; |
| |
| def P7_LS1 : FuncUnit; // Load/Store pipeline 1 |
| def P7_LS2 : FuncUnit; // Load/Store pipeline 2 |
| |
| def P7_FX1 : FuncUnit; // FX pipeline 1 |
| def P7_FX2 : FuncUnit; // FX pipeline 2 |
| |
| // VS pipeline 1 (vector integer ops. always here) |
| def P7_VS1 : FuncUnit; // VS pipeline 1 |
| // VS pipeline 2 (128-bit stores and perms. here) |
| def P7_VS2 : FuncUnit; // VS pipeline 2 |
| |
| def P7_CRU : FuncUnit; // CR unit (CR logicals and move-from-SPRs) |
| def P7_BRU : FuncUnit; // BR unit |
| |
| // Notes: |
| // Each LSU pipeline can also execute FX add and logical instructions. |
| // Each LSU pipeline can complete a load or store in one cycle. |
| // |
| // Each store is broken into two parts, AGEN goes to the LSU while a |
| // "data steering" op. goes to the FXU or VSU. |
| // |
| // FX loads have a two cycle load-to-use latency (so one "bubble" cycle). |
| // VSU loads have a three cycle load-to-use latency (so two "bubble" cycle). |
| // |
| // Frequent FX ops. take only one cycle and results can be used again in the |
| // next cycle (there is a self-bypass). Getting results from the other FX |
| // pipeline takes an additional cycle. |
| // |
| // The VSU XS is similar to the POWER6, but with a pipeline length of 2 cycles |
| // (instead of 3 cycles on the POWER6). VSU XS handles vector FX-style ops. |
| // Dispatch of an instruction to VS1 that uses four single prec. inputs |
| // (either to a float or XC op). prevents dispatch in that cycle to VS2 of any |
| // floating point instruction. |
| // |
| // The VSU PM is similar to the POWER6, but with a pipeline length of 3 cycles |
| // (instead of 4 cycles on the POWER6). vsel is handled by the PM pipeline |
| // (unlike on the POWER6). |
| // |
| // FMA from the VSUs can forward results in 6 cycles. VS1 XS and vector FP |
| // share the same write-back, and have a 5-cycle latency difference, so the |
| // IFU/IDU will not dispatch an XS instructon 5 cycles after a vector FP |
| // op. has been dispatched to VS1. |
| // |
| // Three cycles after an L1 cache hit, a dependent VSU instruction can issue. |
| // |
| // Instruction dispatch groups have (at most) four non-branch instructions, and |
| // two branches. Unlike on the POWER4/5, a branch does not automatically |
| // end the dispatch group, but a second branch must be the last in the group. |
| |
| def P7Itineraries : ProcessorItineraries< |
| [P7_DU1, P7_DU2, P7_DU3, P7_DU4, P7_DU5, P7_DU6, |
| P7_LS1, P7_LS2, P7_FX1, P7_FX2, P7_VS1, P7_VS2, P7_CRU, P7_BRU], [], [ |
| InstrItinData<IIC_IntSimple , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2, |
| P7_LS1, P7_LS2]>], |
| [1, 1, 1]>, |
| InstrItinData<IIC_IntGeneral , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [1, 1, 1]>, |
| InstrItinData<IIC_IntISEL, [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2], 0>, |
| InstrStage<1, [P7_BRU]>], |
| [1, 1, 1, 1]>, |
| InstrItinData<IIC_IntCompare , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [1, 1, 1]>, |
| // FIXME: Add record-form itinerary data. |
| InstrItinData<IIC_IntDivW , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_DU2], 0>, |
| InstrStage<36, [P7_FX1, P7_FX2]>], |
| [36, 1, 1]>, |
| InstrItinData<IIC_IntDivD , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_DU2], 0>, |
| InstrStage<68, [P7_FX1, P7_FX2]>], |
| [68, 1, 1]>, |
| InstrItinData<IIC_IntMulHW , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [4, 1, 1]>, |
| InstrItinData<IIC_IntMulHWU , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [4, 1, 1]>, |
| InstrItinData<IIC_IntMulHD , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [4, 1, 1]>, |
| InstrItinData<IIC_IntMulLI , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [4, 1, 1]>, |
| InstrItinData<IIC_IntRotate , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [1, 1, 1]>, |
| InstrItinData<IIC_IntRotateD , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [1, 1, 1]>, |
| InstrItinData<IIC_IntRotateDI , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [1, 1, 1]>, |
| InstrItinData<IIC_IntShift , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [1, 1, 1]>, |
| InstrItinData<IIC_IntTrapW , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [1, 1]>, |
| InstrItinData<IIC_IntTrapD , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [1, 1]>, |
| InstrItinData<IIC_BrB , [InstrStage<1, [P7_DU5, P7_DU6], 0>, |
| InstrStage<1, [P7_BRU]>], |
| [3, 1, 1]>, |
| InstrItinData<IIC_BrCR , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_CRU]>], |
| [3, 1, 1]>, |
| InstrItinData<IIC_BrMCR , [InstrStage<1, [P7_DU5, P7_DU6], 0>, |
| InstrStage<1, [P7_BRU]>], |
| [3, 1, 1]>, |
| InstrItinData<IIC_BrMCRX , [InstrStage<1, [P7_DU5, P7_DU6], 0>, |
| InstrStage<1, [P7_BRU]>], |
| [3, 1, 1]>, |
| InstrItinData<IIC_LdStLoad , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_LS1, P7_LS2]>], |
| [2, 1, 1]>, |
| InstrItinData<IIC_LdStLoadUpd , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_DU2], 0>, |
| InstrStage<1, [P7_LS1, P7_LS2], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [2, 2, 1, 1]>, |
| InstrItinData<IIC_LdStLoadUpdX, [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_DU2], 0>, |
| InstrStage<1, [P7_DU3], 0>, |
| InstrStage<1, [P7_DU4], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>, |
| InstrStage<1, [P7_LS1, P7_LS2], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [3, 3, 1, 1]>, |
| InstrItinData<IIC_LdStLD , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_LS1, P7_LS2]>], |
| [2, 1, 1]>, |
| InstrItinData<IIC_LdStLDU , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_DU2], 0>, |
| InstrStage<1, [P7_LS1, P7_LS2], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [2, 2, 1, 1]>, |
| InstrItinData<IIC_LdStLDUX , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_DU2], 0>, |
| InstrStage<1, [P7_DU3], 0>, |
| InstrStage<1, [P7_DU4], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>, |
| InstrStage<1, [P7_LS1, P7_LS2], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [3, 3, 1, 1]>, |
| InstrItinData<IIC_LdStLFD , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_LS1, P7_LS2]>], |
| [3, 1, 1]>, |
| InstrItinData<IIC_LdStLVecX , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_LS1, P7_LS2]>], |
| [3, 1, 1]>, |
| InstrItinData<IIC_LdStLFDU , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_DU2], 0>, |
| InstrStage<1, [P7_LS1, P7_LS2], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [3, 3, 1, 1]>, |
| InstrItinData<IIC_LdStLFDUX , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_DU2], 0>, |
| InstrStage<1, [P7_LS1, P7_LS2], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [3, 3, 1, 1]>, |
| InstrItinData<IIC_LdStLHA , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_DU2], 0>, |
| InstrStage<1, [P7_LS1, P7_LS2]>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [3, 1, 1]>, |
| InstrItinData<IIC_LdStLHAU , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_DU2], 0>, |
| InstrStage<1, [P7_LS1, P7_LS2], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [4, 4, 1, 1]>, |
| InstrItinData<IIC_LdStLHAUX , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_DU2], 0>, |
| InstrStage<1, [P7_DU3], 0>, |
| InstrStage<1, [P7_DU4], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>, |
| InstrStage<1, [P7_LS1, P7_LS2], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [4, 4, 1, 1]>, |
| InstrItinData<IIC_LdStLWA , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_DU2], 0>, |
| InstrStage<1, [P7_LS1, P7_LS2]>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [3, 1, 1]>, |
| InstrItinData<IIC_LdStLWARX, [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_DU2], 0>, |
| InstrStage<1, [P7_DU3], 0>, |
| InstrStage<1, [P7_DU4], 0>, |
| InstrStage<1, [P7_LS1, P7_LS2]>], |
| [3, 1, 1]>, |
| InstrItinData<IIC_LdStLDARX, [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_DU2], 0>, |
| InstrStage<1, [P7_DU3], 0>, |
| InstrStage<1, [P7_DU4], 0>, |
| InstrStage<1, [P7_LS1, P7_LS2]>], |
| [3, 1, 1]>, |
| InstrItinData<IIC_LdStLMW , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_LS1, P7_LS2]>], |
| [2, 1, 1]>, |
| InstrItinData<IIC_LdStStore , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_LS1, P7_LS2], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [1, 1, 1]>, |
| InstrItinData<IIC_LdStSTD , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_LS1, P7_LS2], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [1, 1, 1]>, |
| InstrItinData<IIC_LdStSTU , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_DU2], 0>, |
| InstrStage<1, [P7_LS1, P7_LS2], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [2, 1, 1, 1]>, |
| InstrItinData<IIC_LdStSTUX , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_DU2], 0>, |
| InstrStage<1, [P7_DU3], 0>, |
| InstrStage<1, [P7_DU4], 0>, |
| InstrStage<1, [P7_LS1, P7_LS2], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2]>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [2, 1, 1, 1]>, |
| InstrItinData<IIC_LdStSTFD , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_LS1, P7_LS2], 0>, |
| InstrStage<1, [P7_VS1, P7_VS2]>], |
| [1, 1, 1]>, |
| InstrItinData<IIC_LdStSTFDU , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_DU2], 0>, |
| InstrStage<1, [P7_LS1, P7_LS2], 0>, |
| InstrStage<1, [P7_FX1, P7_FX2], 0>, |
| InstrStage<1, [P7_VS1, P7_VS2]>], |
| [2, 1, 1, 1]>, |
| InstrItinData<IIC_LdStSTVEBX , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_LS1, P7_LS2], 0>, |
| InstrStage<1, [P7_VS2]>], |
| [1, 1, 1]>, |
| InstrItinData<IIC_LdStSTDCX , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_DU2], 0>, |
| InstrStage<1, [P7_DU3], 0>, |
| InstrStage<1, [P7_DU4], 0>, |
| InstrStage<1, [P7_LS1, P7_LS2]>], |
| [1, 1, 1]>, |
| InstrItinData<IIC_LdStSTWCX , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_DU2], 0>, |
| InstrStage<1, [P7_DU3], 0>, |
| InstrStage<1, [P7_DU4], 0>, |
| InstrStage<1, [P7_LS1, P7_LS2]>], |
| [1, 1, 1]>, |
| InstrItinData<IIC_BrMCRX , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_DU2], 0>, |
| InstrStage<1, [P7_DU3], 0>, |
| InstrStage<1, [P7_DU4], 0>, |
| InstrStage<1, [P7_CRU]>, |
| InstrStage<1, [P7_FX1, P7_FX2]>], |
| [3, 1]>, // mtcr |
| InstrItinData<IIC_SprMFCR , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_CRU]>], |
| [6, 1]>, |
| InstrItinData<IIC_SprMFCRF , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_CRU]>], |
| [3, 1]>, |
| InstrItinData<IIC_SprMTSPR , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_FX1]>], |
| [4, 1]>, // mtctr |
| InstrItinData<IIC_FPGeneral , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_VS1, P7_VS2]>], |
| [5, 1, 1]>, |
| InstrItinData<IIC_FPAddSub , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_VS1, P7_VS2]>], |
| [5, 1, 1]>, |
| InstrItinData<IIC_FPCompare , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_VS1, P7_VS2]>], |
| [8, 1, 1]>, |
| InstrItinData<IIC_FPDivD , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_VS1, P7_VS2]>], |
| [33, 1, 1]>, |
| InstrItinData<IIC_FPDivS , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_VS1, P7_VS2]>], |
| [27, 1, 1]>, |
| InstrItinData<IIC_FPSqrtD , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_VS1, P7_VS2]>], |
| [44, 1, 1]>, |
| InstrItinData<IIC_FPSqrtS , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_VS1, P7_VS2]>], |
| [32, 1, 1]>, |
| InstrItinData<IIC_FPFused , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_VS1, P7_VS2]>], |
| [5, 1, 1, 1]>, |
| InstrItinData<IIC_FPRes , [InstrStage<1, [P7_DU1, P7_DU2, |
| P7_DU3, P7_DU4], 0>, |
| InstrStage<1, [P7_VS1, P7_VS2]>], |
| [5, 1, 1]>, |
| InstrItinData<IIC_VecGeneral , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_VS1]>], |
| [2, 1, 1]>, |
| InstrItinData<IIC_VecVSL , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_VS1]>], |
| [2, 1, 1]>, |
| InstrItinData<IIC_VecVSR , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_VS1]>], |
| [2, 1, 1]>, |
| InstrItinData<IIC_VecFP , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_VS1, P7_VS2]>], |
| [6, 1, 1]>, |
| InstrItinData<IIC_VecFPCompare, [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_VS1, P7_VS2]>], |
| [6, 1, 1]>, |
| InstrItinData<IIC_VecFPRound , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_VS1, P7_VS2]>], |
| [6, 1, 1]>, |
| InstrItinData<IIC_VecComplex , [InstrStage<1, [P7_DU1], 0>, |
| InstrStage<1, [P7_VS1]>], |
| [7, 1, 1]>, |
| InstrItinData<IIC_VecPerm , [InstrStage<1, [P7_DU1, P7_DU2], 0>, |
| InstrStage<1, [P7_VS2]>], |
| [3, 1, 1]> |
| ]>; |
| |
| // ===---------------------------------------------------------------------===// |
| // P7 machine model for scheduling and other instruction cost heuristics. |
| |
| def P7Model : SchedMachineModel { |
| let IssueWidth = 6; // 4 (non-branch) instructions are dispatched per cycle. |
| // Note that the dispatch bundle size is 6 (including |
| // branches), but the total internal issue bandwidth per |
| // cycle (from all queues) is 8. |
| |
| let LoadLatency = 3; // Optimistic load latency assuming bypass. |
| // This is overriden by OperandCycles if the |
| // Itineraries are queried instead. |
| let MispredictPenalty = 16; |
| |
| // Try to make sure we have at least 10 dispatch groups in a loop. |
| let LoopMicroOpBufferSize = 40; |
| |
| let CompleteModel = 0; |
| |
| let Itineraries = P7Itineraries; |
| } |
| |
