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AArch64SchedPredExynos.td
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AArch64SchedPredExynos.td
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//===- AArch64SchedPredExynos.td - AArch64 Sched Preds -----*- 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 scheduling predicate definitions that are used by the
// AArch64 Exynos processors.
//
//===----------------------------------------------------------------------===//
// Auxiliary predicates.
// Check the shift in arithmetic and logic instructions.
def ExynosCheckShift : CheckAny<[CheckShiftBy0,
CheckAll<
[CheckShiftLSL,
CheckAny<
[CheckShiftBy1,
CheckShiftBy2,
CheckShiftBy3]>]>]>;
// Exynos predicates.
// Identify BLR specifying the LR register as the indirect target register.
def ExynosBranchLinkLRPred : MCSchedPredicate<
CheckAll<[CheckOpcode<[BLR]>,
CheckRegOperand<0, LR>]>>;
// Identify arithmetic instructions without or with limited extension or shift.
def ExynosArithFn : TIIPredicate<
"isExynosArithFast",
MCOpcodeSwitchStatement<
[MCOpcodeSwitchCase<
IsArithExtOp.ValidOpcodes,
MCReturnStatement<
CheckAny<[CheckExtBy0,
CheckAll<
[CheckAny<
[CheckExtUXTW,
CheckExtUXTX]>,
CheckAny<
[CheckExtBy1,
CheckExtBy2,
CheckExtBy3]>]>]>>>,
MCOpcodeSwitchCase<
IsArithShiftOp.ValidOpcodes,
MCReturnStatement<ExynosCheckShift>>,
MCOpcodeSwitchCase<
IsArithUnshiftOp.ValidOpcodes,
MCReturnStatement<TruePred>>,
MCOpcodeSwitchCase<
IsArithImmOp.ValidOpcodes,
MCReturnStatement<TruePred>>],
MCReturnStatement<FalsePred>>>;
def ExynosArithPred : MCSchedPredicate<ExynosArithFn>;
// Identify logic instructions with limited shift.
def ExynosLogicFn : TIIPredicate<
"isExynosLogicFast",
MCOpcodeSwitchStatement<
[MCOpcodeSwitchCase<
IsLogicShiftOp.ValidOpcodes,
MCReturnStatement<ExynosCheckShift>>,
MCOpcodeSwitchCase<
IsLogicUnshiftOp.ValidOpcodes,
MCReturnStatement<TruePred>>,
MCOpcodeSwitchCase<
IsLogicImmOp.ValidOpcodes,
MCReturnStatement<TruePred>>],
MCReturnStatement<FalsePred>>>;
def ExynosLogicPred : MCSchedPredicate<ExynosLogicFn>;
// Identify more logic instructions with limited shift.
def ExynosLogicExFn : TIIPredicate<
"isExynosLogicExFast",
MCOpcodeSwitchStatement<
[MCOpcodeSwitchCase<
IsLogicShiftOp.ValidOpcodes,
MCReturnStatement<
CheckAny<
[ExynosCheckShift,
CheckAll<
[CheckShiftLSL,
CheckShiftBy8]>]>>>,
MCOpcodeSwitchCase<
IsLogicUnshiftOp.ValidOpcodes,
MCReturnStatement<TruePred>>,
MCOpcodeSwitchCase<
IsLogicImmOp.ValidOpcodes,
MCReturnStatement<TruePred>>],
MCReturnStatement<FalsePred>>>;
def ExynosLogicExPred : MCSchedPredicate<ExynosLogicExFn>;
// Identify a load or store using the register offset addressing mode
// with a scaled non-extended register.
def ExynosScaledIdxFn : TIIPredicate<"isExynosScaledAddr",
MCOpcodeSwitchStatement<
[MCOpcodeSwitchCase<
IsLoadStoreRegOffsetOp.ValidOpcodes,
MCReturnStatement<
CheckAny<
[CheckMemExtSXTW,
CheckMemExtUXTW,
CheckMemScaled]>>>],
MCReturnStatement<FalsePred>>>;
def ExynosScaledIdxPred : MCSchedPredicate<ExynosScaledIdxFn>;
// Identify FP instructions.
def ExynosFPPred : MCSchedPredicate<CheckFpOrNEON>;
// Identify 128-bit NEON instructions.
def ExynosQFormPred : MCSchedPredicate<CheckQForm>;
// Identify instructions that reset a register efficiently.
def ExynosResetFn : TIIPredicate<
"isExynosResetFast",
MCOpcodeSwitchStatement<
[MCOpcodeSwitchCase<
[ADR, ADRP,
MOVNWi, MOVNXi,
MOVZWi, MOVZXi],
MCReturnStatement<TruePred>>,
MCOpcodeSwitchCase<
[ORRWri, ORRXri],
MCReturnStatement<
CheckAll<
[CheckIsRegOperand<1>,
CheckAny<
[CheckRegOperand<1, WZR>,
CheckRegOperand<1, XZR>]>]>>>],
MCReturnStatement<
CheckAny<
[IsCopyIdiomFn,
IsZeroFPIdiomFn]>>>>;
def ExynosResetPred : MCSchedPredicate<ExynosResetFn>;
// Identify EXTR as the alias for ROR (immediate).
def ExynosRotateRightImmPred : MCSchedPredicate<
CheckAll<[CheckOpcode<[EXTRWrri, EXTRXrri]>,
CheckSameRegOperand<1, 2>]>>;
// Identify cheap arithmetic and logic immediate instructions.
def ExynosCheapFn : TIIPredicate<
"isExynosCheapAsMove",
MCOpcodeSwitchStatement<
[MCOpcodeSwitchCase<
IsArithLogicImmOp.ValidOpcodes,
MCReturnStatement<TruePred>>],
MCReturnStatement<
CheckAny<
[ExynosArithFn, ExynosResetFn, ExynosLogicFn]>>>>;