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|
//===-- RISCVFeatures.td - RISCV Features and Extensions ---*- 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
//
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
// RISC-V subtarget features and instruction predicates.
//===----------------------------------------------------------------------===//
def FeatureStdExtM
: SubtargetFeature<"m", "HasStdExtM", "true",
"'M' (Integer Multiplication and Division)">;
def HasStdExtM : Predicate<"Subtarget->hasStdExtM()">,
AssemblerPredicate<(all_of FeatureStdExtM),
"'M' (Integer Multiplication and Division)">;
def FeatureStdExtZmmul
: SubtargetFeature<"zmmul", "HasStdExtZmmul", "true",
"'Zmmul' (Integer Multiplication)">;
def HasStdExtMOrZmmul
: Predicate<"Subtarget->hasStdExtM() || Subtarget->hasStdExtZmmul()">,
AssemblerPredicate<(any_of FeatureStdExtM, FeatureStdExtZmmul),
"'M' (Integer Multiplication and Division) or "
"'Zmmul' (Integer Multiplication)">;
def FeatureStdExtA
: SubtargetFeature<"a", "HasStdExtA", "true",
"'A' (Atomic Instructions)">;
def HasStdExtA : Predicate<"Subtarget->hasStdExtA()">,
AssemblerPredicate<(all_of FeatureStdExtA),
"'A' (Atomic Instructions)">;
def FeatureStdExtF
: SubtargetFeature<"f", "HasStdExtF", "true",
"'F' (Single-Precision Floating-Point)">;
def HasStdExtF : Predicate<"Subtarget->hasStdExtF()">,
AssemblerPredicate<(all_of FeatureStdExtF),
"'F' (Single-Precision Floating-Point)">;
def FeatureStdExtD
: SubtargetFeature<"d", "HasStdExtD", "true",
"'D' (Double-Precision Floating-Point)",
[FeatureStdExtF]>;
def HasStdExtD : Predicate<"Subtarget->hasStdExtD()">,
AssemblerPredicate<(all_of FeatureStdExtD),
"'D' (Double-Precision Floating-Point)">;
def FeatureStdExtH
: SubtargetFeature<"h", "HasStdExtH", "true",
"'H' (Hypervisor)">;
def HasStdExtH : Predicate<"Subtarget->hasStdExtH()">,
AssemblerPredicate<(all_of FeatureStdExtH),
"'H' (Hypervisor)">;
def FeatureStdExtZihintpause
: SubtargetFeature<"zihintpause", "HasStdExtZihintpause", "true",
"'zihintpause' (Pause Hint)">;
def HasStdExtZihintpause : Predicate<"Subtarget->hasStdExtZihintpause()">,
AssemblerPredicate<(all_of FeatureStdExtZihintpause),
"'Zihintpause' (Pause Hint)">;
def FeatureStdExtZihintntl
: SubtargetFeature<"experimental-zihintntl", "HasStdExtZihintntl", "true",
"'zihintntl' (Non-Temporal Locality Hints)">;
def HasStdExtZihintntl : Predicate<"Subtarget->hasStdExtZihintntl()">,
AssemblerPredicate<(all_of FeatureStdExtZihintntl),
"'Zihintntl' (Non-Temporal Locality Hints)">;
def FeatureStdExtZfhmin
: SubtargetFeature<"zfhmin", "HasStdExtZfhmin", "true",
"'Zfhmin' (Half-Precision Floating-Point Minimal)",
[FeatureStdExtF]>;
def HasStdExtZfhmin : Predicate<"Subtarget->hasStdExtZfhmin()">,
AssemblerPredicate<(all_of FeatureStdExtZfhmin),
"'Zfhmin' (Half-Precision Floating-Point Minimal)">;
def FeatureStdExtZfh
: SubtargetFeature<"zfh", "HasStdExtZfh", "true",
"'Zfh' (Half-Precision Floating-Point)",
[FeatureStdExtF]>;
def HasStdExtZfh : Predicate<"Subtarget->hasStdExtZfh()">,
AssemblerPredicate<(all_of FeatureStdExtZfh),
"'Zfh' (Half-Precision Floating-Point)">;
def NoStdExtZfh : Predicate<"!Subtarget->hasStdExtZfh()">;
def HasStdExtZfhOrZfhmin
: Predicate<"Subtarget->hasStdExtZfh() || Subtarget->hasStdExtZfhmin()">,
AssemblerPredicate<(any_of FeatureStdExtZfh, FeatureStdExtZfhmin),
"'Zfh' (Half-Precision Floating-Point) or "
"'Zfhmin' (Half-Precision Floating-Point Minimal)">;
def FeatureStdExtZfinx
: SubtargetFeature<"zfinx", "HasStdExtZfinx", "true",
"'Zfinx' (Float in Integer)">;
def HasStdExtZfinx : Predicate<"Subtarget->hasStdExtZfinx()">,
AssemblerPredicate<(all_of FeatureStdExtZfinx),
"'Zfinx' (Float in Integer)">;
def FeatureStdExtZdinx
: SubtargetFeature<"zdinx", "HasStdExtZdinx", "true",
"'Zdinx' (Double in Integer)",
[FeatureStdExtZfinx]>;
def HasStdExtZdinx : Predicate<"Subtarget->hasStdExtZdinx()">,
AssemblerPredicate<(all_of FeatureStdExtZdinx),
"'Zdinx' (Double in Integer)">;
def FeatureStdExtZhinxmin
: SubtargetFeature<"zhinxmin", "HasStdExtZhinxmin", "true",
"'Zhinxmin' (Half Float in Integer Minimal)",
[FeatureStdExtZfinx]>;
def HasStdExtZhinxmin : Predicate<"Subtarget->hasStdExtZhinxmin()">,
AssemblerPredicate<(all_of FeatureStdExtZhinxmin),
"'Zhinxmin' (Half Float in Integer Minimal)">;
def FeatureStdExtZhinx
: SubtargetFeature<"zhinx", "HasStdExtZhinx", "true",
"'Zhinx' (Half Float in Integer)",
[FeatureStdExtZfinx]>;
def HasStdExtZhinx : Predicate<"Subtarget->hasStdExtZhinx()">,
AssemblerPredicate<(all_of FeatureStdExtZhinx),
"'Zhinx' (Half Float in Integer)">;
def HasStdExtZhinxOrZhinxmin
: Predicate<"Subtarget->hasStdExtZhinx() || Subtarget->hasStdExtZhinxmin()">,
AssemblerPredicate<(any_of FeatureStdExtZhinx, FeatureStdExtZhinxmin),
"'Zhinx' (Half Float in Integer) or "
"'Zhinxmin' (Half Float in Integer Minimal)">;
def FeatureStdExtC
: SubtargetFeature<"c", "HasStdExtC", "true",
"'C' (Compressed Instructions)">;
def HasStdExtC : Predicate<"Subtarget->hasStdExtC()">,
AssemblerPredicate<(all_of FeatureStdExtC),
"'C' (Compressed Instructions)">;
def FeatureStdExtZba
: SubtargetFeature<"zba", "HasStdExtZba", "true",
"'Zba' (Address Generation Instructions)">;
def HasStdExtZba : Predicate<"Subtarget->hasStdExtZba()">,
AssemblerPredicate<(all_of FeatureStdExtZba),
"'Zba' (Address Generation Instructions)">;
def NotHasStdExtZba : Predicate<"!Subtarget->hasStdExtZba()">;
def FeatureStdExtZbb
: SubtargetFeature<"zbb", "HasStdExtZbb", "true",
"'Zbb' (Basic Bit-Manipulation)">;
def HasStdExtZbb : Predicate<"Subtarget->hasStdExtZbb()">,
AssemblerPredicate<(all_of FeatureStdExtZbb),
"'Zbb' (Basic Bit-Manipulation)">;
def FeatureStdExtZbc
: SubtargetFeature<"zbc", "HasStdExtZbc", "true",
"'Zbc' (Carry-Less Multiplication)">;
def HasStdExtZbc : Predicate<"Subtarget->hasStdExtZbc()">,
AssemblerPredicate<(all_of FeatureStdExtZbc),
"'Zbc' (Carry-Less Multiplication)">;
def FeatureStdExtZbs
: SubtargetFeature<"zbs", "HasStdExtZbs", "true",
"'Zbs' (Single-Bit Instructions)">;
def HasStdExtZbs : Predicate<"Subtarget->hasStdExtZbs()">,
AssemblerPredicate<(all_of FeatureStdExtZbs),
"'Zbs' (Single-Bit Instructions)">;
def FeatureStdExtZbkb
: SubtargetFeature<"zbkb", "HasStdExtZbkb", "true",
"'Zbkb' (Bitmanip instructions for Cryptography)">;
def HasStdExtZbkb : Predicate<"Subtarget->hasStdExtZbkb()">,
AssemblerPredicate<(all_of FeatureStdExtZbkb),
"'Zbkb' (Bitmanip instructions for Cryptography)">;
def FeatureStdExtZbkx
: SubtargetFeature<"zbkx", "HasStdExtZbkx", "true",
"'Zbkx' (Crossbar permutation instructions)">;
def HasStdExtZbkx : Predicate<"Subtarget->hasStdExtZbkx()">,
AssemblerPredicate<(all_of FeatureStdExtZbkx),
"'Zbkx' (Crossbar permutation instructions)">;
def HasStdExtZbbOrZbkb
: Predicate<"Subtarget->hasStdExtZbb() || Subtarget->hasStdExtZbkb()">,
AssemblerPredicate<(any_of FeatureStdExtZbb, FeatureStdExtZbkb),
"'Zbb' (Basic Bit-Manipulation) or "
"'Zbkb' (Bitmanip instructions for Cryptography)">;
// The Carry-less multiply subextension for cryptography is a subset of basic
// carry-less multiply subextension. The former should be enabled if the latter
// is enabled.
def FeatureStdExtZbkc
: SubtargetFeature<"zbkc", "HasStdExtZbkc", "true",
"'Zbkc' (Carry-less multiply instructions for "
"Cryptography)">;
def HasStdExtZbkc
: Predicate<"Subtarget->hasStdExtZbkc()">,
AssemblerPredicate<(all_of FeatureStdExtZbkc),
"'Zbkc' (Carry-less multiply instructions for Cryptography)">;
def HasStdExtZbcOrZbkc
: Predicate<"Subtarget->hasStdExtZbc() || Subtarget->hasStdExtZbkc()">,
AssemblerPredicate<(any_of FeatureStdExtZbc, FeatureStdExtZbkc),
"'Zbc' (Carry-Less Multiplication) or "
"'Zbkc' (Carry-less multiply instructions "
"for Cryptography)">;
def FeatureStdExtZknd
: SubtargetFeature<"zknd", "HasStdExtZknd", "true",
"'Zknd' (NIST Suite: AES Decryption)">;
def HasStdExtZknd : Predicate<"Subtarget->hasStdExtZknd()">,
AssemblerPredicate<(all_of FeatureStdExtZknd),
"'Zknd' (NIST Suite: AES Decryption)">;
def FeatureStdExtZkne
: SubtargetFeature<"zkne", "HasStdExtZkne", "true",
"'Zkne' (NIST Suite: AES Encryption)">;
def HasStdExtZkne : Predicate<"Subtarget->hasStdExtZkne()">,
AssemblerPredicate<(all_of FeatureStdExtZkne),
"'Zkne' (NIST Suite: AES Encryption)">;
// Some instructions belong to both Zknd and Zkne subextensions.
// They should be enabled if either has been specified.
def HasStdExtZkndOrZkne
: Predicate<"Subtarget->hasStdExtZknd() || Subtarget->hasStdExtZkne()">,
AssemblerPredicate<(any_of FeatureStdExtZknd, FeatureStdExtZkne),
"'Zknd' (NIST Suite: AES Decryption) or "
"'Zkne' (NIST Suite: AES Encryption)">;
def FeatureStdExtZknh
: SubtargetFeature<"zknh", "HasStdExtZknh", "true",
"'Zknh' (NIST Suite: Hash Function Instructions)">;
def HasStdExtZknh : Predicate<"Subtarget->hasStdExtZknh()">,
AssemblerPredicate<(all_of FeatureStdExtZknh),
"'Zknh' (NIST Suite: Hash Function Instructions)">;
def FeatureStdExtZksed
: SubtargetFeature<"zksed", "HasStdExtZksed", "true",
"'Zksed' (ShangMi Suite: SM4 Block Cipher Instructions)">;
def HasStdExtZksed : Predicate<"Subtarget->hasStdExtZksed()">,
AssemblerPredicate<(all_of FeatureStdExtZksed),
"'Zksed' (ShangMi Suite: SM4 Block Cipher Instructions)">;
def FeatureStdExtZksh
: SubtargetFeature<"zksh", "HasStdExtZksh", "true",
"'Zksh' (ShangMi Suite: SM3 Hash Function Instructions)">;
def HasStdExtZksh : Predicate<"Subtarget->hasStdExtZksh()">,
AssemblerPredicate<(all_of FeatureStdExtZksh),
"'Zksh' (ShangMi Suite: SM3 Hash Function "
"Instructions)">;
def FeatureStdExtZkr
: SubtargetFeature<"zkr", "HasStdExtZkr", "true",
"'Zkr' (Entropy Source Extension)">;
def HasStdExtZkr : Predicate<"Subtarget->hasStdExtZkr()">,
AssemblerPredicate<(all_of FeatureStdExtZkr),
"'Zkr' (Entropy Source Extension)">;
def FeatureStdExtZkn
: SubtargetFeature<"zkn", "HasStdExtZkn", "true",
"'Zkn' (NIST Algorithm Suite)",
[FeatureStdExtZbkb,
FeatureStdExtZbkc,
FeatureStdExtZbkx,
FeatureStdExtZkne,
FeatureStdExtZknd,
FeatureStdExtZknh]>;
def FeatureStdExtZks
: SubtargetFeature<"zks", "HasStdExtZks", "true",
"'Zks' (ShangMi Algorithm Suite)",
[FeatureStdExtZbkb,
FeatureStdExtZbkc,
FeatureStdExtZbkx,
FeatureStdExtZksed,
FeatureStdExtZksh]>;
def FeatureStdExtZkt
: SubtargetFeature<"zkt", "HasStdExtZkt", "true",
"'Zkt' (Data Independent Execution Latency)">;
def FeatureStdExtZk
: SubtargetFeature<"zk", "HasStdExtZk", "true",
"'Zk' (Standard scalar cryptography extension)",
[FeatureStdExtZkn,
FeatureStdExtZkr,
FeatureStdExtZkt]>;
def FeatureExtZca
: SubtargetFeature<"experimental-zca", "HasStdExtZca", "true",
"'Zca' (part of the C extension, excluding compressed "
"floating point loads/stores)">;
def HasStdExtCOrZca
: Predicate<"Subtarget->hasStdExtC() || Subtarget->hasStdExtZca()">,
AssemblerPredicate<(any_of FeatureStdExtC, FeatureExtZca),
"'C' (Compressed Instructions) or "
"'Zca' (part of the C extension, excluding "
"compressed floating point loads/stores)">;
def FeatureExtZcd
: SubtargetFeature<"experimental-zcd", "HasStdExtZcd", "true",
"'Zcd' (Compressed Double-Precision Floating-Point Instructions)">;
def HasStdExtCOrZcd
: Predicate<"Subtarget->hasStdExtC() || Subtarget->hasStdExtZcd()">,
AssemblerPredicate<(any_of FeatureStdExtC, FeatureExtZcd),
"'C' (Compressed Instructions) or "
"'Zcd' (Compressed Double-Precision Floating-Point Instructions)">;
def FeatureExtZcf
: SubtargetFeature<"experimental-zcf", "HasStdExtZcf", "true",
"'Zcf' (Compressed Single-Precision Floating-Point Instructions)">;
def HasStdExtCOrZcf
: Predicate<"Subtarget->hasStdExtC() || Subtarget->hasStdExtZcf()">,
AssemblerPredicate<(any_of FeatureStdExtC, FeatureExtZcf),
"'C' (Compressed Instructions) or "
"'Zcf' (Compressed Single-Precision Floating-Point Instructions)">;
def FeatureNoRVCHints
: SubtargetFeature<"no-rvc-hints", "EnableRVCHintInstrs", "false",
"Disable RVC Hint Instructions.">;
def HasRVCHints : Predicate<"Subtarget->enableRVCHintInstrs()">,
AssemblerPredicate<(all_of(not FeatureNoRVCHints)),
"RVC Hint Instructions">;
def FeatureStdExtZvl32b : SubtargetFeature<"zvl32b", "ZvlLen", "32",
"'Zvl' (Minimum Vector Length) 32">;
foreach i = { 6-16 } in {
defvar I = !shl(1, i);
def FeatureStdExtZvl#I#b :
SubtargetFeature<"zvl"#I#"b", "ZvlLen", !cast<string>(I),
"'Zvl' (Minimum Vector Length) "#I,
[!cast<SubtargetFeature>("FeatureStdExtZvl"#!srl(I, 1)#"b")]>;
}
def FeatureStdExtZve32x
: SubtargetFeature<"zve32x", "HasStdExtZve32x", "true",
"'Zve32x' (Vector Extensions for Embedded Processors "
"with maximal 32 EEW)",
[FeatureStdExtZvl32b]>;
def FeatureStdExtZve32f
: SubtargetFeature<"zve32f", "HasStdExtZve32f", "true",
"'Zve32f' (Vector Extensions for Embedded Processors "
"with maximal 32 EEW and F extension)",
[FeatureStdExtZve32x]>;
def FeatureStdExtZve64x
: SubtargetFeature<"zve64x", "HasStdExtZve64x", "true",
"'Zve64x' (Vector Extensions for Embedded Processors "
"with maximal 64 EEW)",
[FeatureStdExtZve32x, FeatureStdExtZvl64b]>;
def FeatureStdExtZve64f
: SubtargetFeature<"zve64f", "HasStdExtZve64f", "true",
"'Zve64f' (Vector Extensions for Embedded Processors "
"with maximal 64 EEW and F extension)",
[FeatureStdExtZve32f, FeatureStdExtZve64x]>;
def FeatureStdExtZve64d
: SubtargetFeature<"zve64d", "HasStdExtZve64d", "true",
"'Zve64d' (Vector Extensions for Embedded Processors "
"with maximal 64 EEW, F and D extension)",
[FeatureStdExtZve64f]>;
def FeatureStdExtV
: SubtargetFeature<"v", "HasStdExtV", "true",
"'V' (Vector Extension for Application Processors)",
[FeatureStdExtZvl128b, FeatureStdExtZve64d,
FeatureStdExtF, FeatureStdExtD]>;
def HasVInstructions : Predicate<"Subtarget->hasVInstructions()">,
AssemblerPredicate<
(any_of FeatureStdExtZve32x),
"'V' (Vector Extension for Application Processors), 'Zve32x' or "
"'Zve64x' (Vector Extensions for Embedded Processors)">;
def HasVInstructionsI64 : Predicate<"Subtarget->hasVInstructionsI64()">,
AssemblerPredicate<
(any_of FeatureStdExtZve64x),
"'V' (Vector Extension for Application Processors) or 'Zve64x' "
"(Vector Extensions for Embedded Processors)">;
def HasVInstructionsAnyF : Predicate<"Subtarget->hasVInstructionsAnyF()">,
AssemblerPredicate<
(any_of FeatureStdExtZve32f),
"'V' (Vector Extension for Application Processors), 'Zve32f', "
"'Zve64f' or 'Zve64d' (Vector Extensions for Embedded Processors)">;
def FeatureStdExtZvfh
: SubtargetFeature<"experimental-zvfh", "HasStdExtZvfh", "true",
"'Zvfh' (Vector Half-Precision Floating-Point)",
[FeatureStdExtZve32f]>;
def FeatureStdExtZicbom
: SubtargetFeature<"zicbom", "HasStdExtZicbom", "true",
"'Zicbom' (Cache-Block Management Instructions)">;
def HasStdExtZicbom : Predicate<"Subtarget->hasStdExtZicbom()">,
AssemblerPredicate<(all_of FeatureStdExtZicbom),
"'Zicbom' (Cache-Block Management Instructions)">;
def FeatureStdExtZicboz
: SubtargetFeature<"zicboz", "HasStdExtZicboz", "true",
"'Zicboz' (Cache-Block Zero Instructions)">;
def HasStdExtZicboz : Predicate<"Subtarget->hasStdExtZicboz()">,
AssemblerPredicate<(all_of FeatureStdExtZicboz),
"'Zicboz' (Cache-Block Zero Instructions)">;
def FeatureStdExtZicbop
: SubtargetFeature<"zicbop", "HasStdExtZicbop", "true",
"'Zicbop' (Cache-Block Prefetch Instructions)">;
def HasStdExtZicbop : Predicate<"Subtarget->hasStdExtZicbop()">,
AssemblerPredicate<(all_of FeatureStdExtZicbop),
"'Zicbop' (Cache-Block Prefetch Instructions)">;
def FeatureStdExtSvnapot
: SubtargetFeature<"svnapot", "HasStdExtSvnapot", "true",
"'Svnapot' (NAPOT Translation Contiguity)">;
def FeatureStdExtSvpbmt
: SubtargetFeature<"svpbmt", "HasStdExtSvpbmt", "true",
"'Svpbmt' (Page-Based Memory Types)">;
def FeatureStdExtSvinval
: SubtargetFeature<"svinval", "HasStdExtSvinval", "true",
"'Svinval' (Fine-Grained Address-Translation Cache Invalidation)">;
def HasStdExtSvinval : Predicate<"Subtarget->hasStdExtSvinval()">,
AssemblerPredicate<(all_of FeatureStdExtSvinval),
"'Svinval' (Fine-Grained Address-Translation Cache Invalidation)">;
def FeatureStdExtZtso
: SubtargetFeature<"experimental-ztso", "HasStdExtZtso", "true",
"'Ztso' (Memory Model - Total Store Order)">;
def HasStdExtZtso : Predicate<"Subtarget->hasStdExtZTso()">,
AssemblerPredicate<(all_of FeatureStdExtZtso),
"'Ztso' (Memory Model - Total Store Order)">;
def FeatureStdExtZawrs
: SubtargetFeature<"experimental-zawrs", "HasStdExtZawrs", "true",
"'Zawrs' (Wait on Reservation Set)">;
def HasStdExtZawrs : Predicate<"Subtarget->hasStdExtZawrs()">,
AssemblerPredicate<(all_of FeatureStdExtZawrs),
"'Zawrs' (Wait on Reservation Set)">;
//===----------------------------------------------------------------------===//
// Vendor extensions
//===----------------------------------------------------------------------===//
def FeatureVendorXVentanaCondOps
: SubtargetFeature<"xventanacondops", "HasVendorXVentanaCondOps", "true",
"'XVentanaCondOps' (Ventana Conditional Ops)">;
def HasVendorXVentanaCondOps : Predicate<"Subtarget->hasVendorXVentanaCondOps()">,
AssemblerPredicate<(all_of FeatureVendorXVentanaCondOps),
"'XVentanaCondOps' (Ventana Conditional Ops)">;
def FeatureVendorXTHeadVdot
: SubtargetFeature<"xtheadvdot", "HasVendorXTHeadVdot", "true",
"'xtheadvdot' (T-Head Vector Extensions for Dot)",
[FeatureStdExtV]>;
def HasVendorXTHeadVdot : Predicate<"Subtarget->hasVendorXTHeadVdot()">,
AssemblerPredicate<(all_of FeatureVendorXTHeadVdot),
"'xtheadvdot' (T-Head Vector Extensions for Dot)">;
//===----------------------------------------------------------------------===//
// LLVM specific features and extensions
//===----------------------------------------------------------------------===//
// Feature32Bit exists to mark CPUs that support RV32 to distinquish them from
// tuning CPU names.
def Feature32Bit
: SubtargetFeature<"32bit", "HasRV32", "true", "Implements RV32">;
def Feature64Bit
: SubtargetFeature<"64bit", "HasRV64", "true", "Implements RV64">;
def IsRV64 : Predicate<"Subtarget->is64Bit()">,
AssemblerPredicate<(all_of Feature64Bit),
"RV64I Base Instruction Set">;
def IsRV32 : Predicate<"!Subtarget->is64Bit()">,
AssemblerPredicate<(all_of (not Feature64Bit)),
"RV32I Base Instruction Set">;
defvar RV32 = DefaultMode;
def RV64 : HwMode<"+64bit">;
def FeatureRV32E
: SubtargetFeature<"e", "IsRV32E", "true",
"Implements RV32E (provides 16 rather than 32 GPRs)">;
def IsRV32E : Predicate<"Subtarget->isRV32E()">,
AssemblerPredicate<(all_of FeatureRV32E)>;
def FeatureRelax
: SubtargetFeature<"relax", "EnableLinkerRelax", "true",
"Enable Linker relaxation.">;
foreach i = {1-31} in
def FeatureReserveX#i :
SubtargetFeature<"reserve-x"#i, "UserReservedRegister[RISCV::X"#i#"]",
"true", "Reserve X"#i>;
def FeatureSaveRestore : SubtargetFeature<"save-restore", "EnableSaveRestore",
"true", "Enable save/restore.">;
def FeatureUnalignedScalarMem
: SubtargetFeature<"unaligned-scalar-mem", "EnableUnalignedScalarMem",
"true", "Has reasonably performant unaligned scalar "
"loads and stores">;
def TuneNoOptimizedZeroStrideLoad
: SubtargetFeature<"no-optimized-zero-stride-load", "HasOptimizedZeroStrideLoad",
"false", "Hasn't optimized (perform fewer memory operations)"
"zero-stride vector load">;
def TuneLUIADDIFusion
: SubtargetFeature<"lui-addi-fusion", "HasLUIADDIFusion",
"true", "Enable LUI+ADDI macrofusion">;
def TuneNoDefaultUnroll
: SubtargetFeature<"no-default-unroll", "EnableDefaultUnroll", "false",
"Disable default unroll preference.">;
// SiFive 7 is able to fuse integer ALU operations with a preceding branch
// instruction.
def TuneShortForwardBranchOpt
: SubtargetFeature<"short-forward-branch-opt", "HasShortForwardBranchOpt",
"true", "Enable short forward branch optimization">;
def HasShortForwardBranchOpt : Predicate<"Subtarget->hasShortForwardBranchOpt()">;
def NoShortForwardBranchOpt : Predicate<"!Subtarget->hasShortForwardBranchOpt()">;
def TuneSiFive7 : SubtargetFeature<"sifive7", "RISCVProcFamily", "SiFive7",
"SiFive 7-Series processors",
[TuneNoDefaultUnroll,
TuneShortForwardBranchOpt]>;
// Assume that lock-free native-width atomics are available, even if the target
// and operating system combination would not usually provide them. The user
// is responsible for providing any necessary __sync implementations. Code
// built with this feature is not ABI-compatible with code built without this
// feature, if atomic variables are exposed across the ABI boundary.
def FeatureForcedAtomics : SubtargetFeature<
"forced-atomics", "HasForcedAtomics", "true",
"Assume that lock-free native-width atomics are available">;
def HasAtomicLdSt
: Predicate<"Subtarget->hasStdExtA() || Subtarget->hasForcedAtomics()">;
def FeatureTaggedGlobals : SubtargetFeature<"tagged-globals",
"AllowTaggedGlobals",
"true", "Use an instruction sequence for taking the address of a global "
"that allows a memory tag in the upper address bits">;
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