| //===-- ARM.td - Describe the ARM Target Machine -----------*- tablegen -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // |
| //===----------------------------------------------------------------------===// |
| |
| //===----------------------------------------------------------------------===// |
| // Target-independent interfaces which we are implementing |
| //===----------------------------------------------------------------------===// |
| |
| include "llvm/Target/Target.td" |
| |
| //===----------------------------------------------------------------------===// |
| // ARM Subtarget state. |
| // |
| |
| def ModeThumb : SubtargetFeature<"thumb-mode", "InThumbMode", "true", |
| "Thumb mode">; |
| |
| //===----------------------------------------------------------------------===// |
| // ARM Subtarget features. |
| // |
| |
| def FeatureVFP2 : SubtargetFeature<"vfp2", "HasVFPv2", "true", |
| "Enable VFP2 instructions">; |
| def FeatureVFP3 : SubtargetFeature<"vfp3", "HasVFPv3", "true", |
| "Enable VFP3 instructions", |
| [FeatureVFP2]>; |
| def FeatureVFP4 : SubtargetFeature<"vfp4", "HasVFPv4", "true", |
| "Enable VFP4 instructions", |
| [FeatureVFP3]>; |
| def FeatureNEON : SubtargetFeature<"neon", "HasNEON", "true", |
| "Enable NEON instructions", |
| [FeatureVFP3]>; |
| def FeatureThumb2 : SubtargetFeature<"thumb2", "HasThumb2", "true", |
| "Enable Thumb2 instructions">; |
| def FeatureNoARM : SubtargetFeature<"noarm", "NoARM", "true", |
| "Does not support ARM mode execution">; |
| def FeatureFP16 : SubtargetFeature<"fp16", "HasFP16", "true", |
| "Enable half-precision floating point">; |
| def FeatureD16 : SubtargetFeature<"d16", "HasD16", "true", |
| "Restrict VFP3 to 16 double registers">; |
| def FeatureHWDiv : SubtargetFeature<"hwdiv", "HasHardwareDivide", "true", |
| "Enable divide instructions">; |
| def FeatureT2XtPk : SubtargetFeature<"t2xtpk", "HasT2ExtractPack", "true", |
| "Enable Thumb2 extract and pack instructions">; |
| def FeatureDB : SubtargetFeature<"db", "HasDataBarrier", "true", |
| "Has data barrier (dmb / dsb) instructions">; |
| def FeatureSlowFPBrcc : SubtargetFeature<"slow-fp-brcc", "SlowFPBrcc", "true", |
| "FP compare + branch is slow">; |
| def FeatureVFPOnlySP : SubtargetFeature<"fp-only-sp", "FPOnlySP", "true", |
| "Floating point unit supports single precision only">; |
| |
| // Some processors have FP multiply-accumulate instructions that don't |
| // play nicely with other VFP / NEON instructions, and it's generally better |
| // to just not use them. |
| def FeatureHasSlowFPVMLx : SubtargetFeature<"slowfpvmlx", "SlowFPVMLx", "true", |
| "Disable VFP / NEON MAC instructions">; |
| |
| // Cortex-A8 / A9 Advanced SIMD has multiplier accumulator forwarding. |
| def FeatureVMLxForwarding : SubtargetFeature<"vmlx-forwarding", |
| "HasVMLxForwarding", "true", |
| "Has multiplier accumulator forwarding">; |
| |
| // Some processors benefit from using NEON instructions for scalar |
| // single-precision FP operations. |
| def FeatureNEONForFP : SubtargetFeature<"neonfp", "UseNEONForSinglePrecisionFP", |
| "true", |
| "Use NEON for single precision FP">; |
| |
| // Disable 32-bit to 16-bit narrowing for experimentation. |
| def FeaturePref32BitThumb : SubtargetFeature<"32bit", "Pref32BitThumb", "true", |
| "Prefer 32-bit Thumb instrs">; |
| |
| /// Some instructions update CPSR partially, which can add false dependency for |
| /// out-of-order implementation, e.g. Cortex-A9, unless each individual bit is |
| /// mapped to a separate physical register. Avoid partial CPSR update for these |
| /// processors. |
| def FeatureAvoidPartialCPSR : SubtargetFeature<"avoid-partial-cpsr", |
| "AvoidCPSRPartialUpdate", "true", |
| "Avoid CPSR partial update for OOO execution">; |
| |
| // Some processors perform return stack prediction. CodeGen should avoid issue |
| // "normal" call instructions to callees which do not return. |
| def FeatureHasRAS : SubtargetFeature<"ras", "HasRAS", "true", |
| "Has return address stack">; |
| |
| /// Some M architectures don't have the DSP extension (v7E-M vs. v7M) |
| def FeatureDSPThumb2 : SubtargetFeature<"t2dsp", "Thumb2DSP", "true", |
| "Supports v7 DSP instructions in Thumb2">; |
| |
| // Multiprocessing extension. |
| def FeatureMP : SubtargetFeature<"mp", "HasMPExtension", "true", |
| "Supports Multiprocessing extension">; |
| |
| // M-series ISA? |
| def FeatureMClass : SubtargetFeature<"mclass", "IsMClass", "true", |
| "Is microcontroller profile ('M' series)">; |
| |
| // ARM ISAs. |
| def HasV4TOps : SubtargetFeature<"v4t", "HasV4TOps", "true", |
| "Support ARM v4T instructions">; |
| def HasV5TOps : SubtargetFeature<"v5t", "HasV5TOps", "true", |
| "Support ARM v5T instructions", |
| [HasV4TOps]>; |
| def HasV5TEOps : SubtargetFeature<"v5te", "HasV5TEOps", "true", |
| "Support ARM v5TE, v5TEj, and v5TExp instructions", |
| [HasV5TOps]>; |
| def HasV6Ops : SubtargetFeature<"v6", "HasV6Ops", "true", |
| "Support ARM v6 instructions", |
| [HasV5TEOps]>; |
| def HasV6T2Ops : SubtargetFeature<"v6t2", "HasV6T2Ops", "true", |
| "Support ARM v6t2 instructions", |
| [HasV6Ops, FeatureThumb2]>; |
| def HasV7Ops : SubtargetFeature<"v7", "HasV7Ops", "true", |
| "Support ARM v7 instructions", |
| [HasV6T2Ops]>; |
| |
| //===----------------------------------------------------------------------===// |
| // ARM Processors supported. |
| // |
| |
| include "ARMSchedule.td" |
| |
| // ARM processor families. |
| def ProcA8 : SubtargetFeature<"a8", "ARMProcFamily", "CortexA8", |
| "Cortex-A8 ARM processors", |
| [FeatureSlowFPBrcc, FeatureNEONForFP, |
| FeatureHasSlowFPVMLx, FeatureVMLxForwarding, |
| FeatureT2XtPk]>; |
| def ProcA9 : SubtargetFeature<"a9", "ARMProcFamily", "CortexA9", |
| "Cortex-A9 ARM processors", |
| [FeatureVMLxForwarding, |
| FeatureT2XtPk, FeatureFP16, |
| FeatureAvoidPartialCPSR]>; |
| |
| class ProcNoItin<string Name, list<SubtargetFeature> Features> |
| : Processor<Name, GenericItineraries, Features>; |
| |
| // V4 Processors. |
| def : ProcNoItin<"generic", []>; |
| def : ProcNoItin<"arm8", []>; |
| def : ProcNoItin<"arm810", []>; |
| def : ProcNoItin<"strongarm", []>; |
| def : ProcNoItin<"strongarm110", []>; |
| def : ProcNoItin<"strongarm1100", []>; |
| def : ProcNoItin<"strongarm1110", []>; |
| |
| // V4T Processors. |
| def : ProcNoItin<"arm7tdmi", [HasV4TOps]>; |
| def : ProcNoItin<"arm7tdmi-s", [HasV4TOps]>; |
| def : ProcNoItin<"arm710t", [HasV4TOps]>; |
| def : ProcNoItin<"arm720t", [HasV4TOps]>; |
| def : ProcNoItin<"arm9", [HasV4TOps]>; |
| def : ProcNoItin<"arm9tdmi", [HasV4TOps]>; |
| def : ProcNoItin<"arm920", [HasV4TOps]>; |
| def : ProcNoItin<"arm920t", [HasV4TOps]>; |
| def : ProcNoItin<"arm922t", [HasV4TOps]>; |
| def : ProcNoItin<"arm940t", [HasV4TOps]>; |
| def : ProcNoItin<"ep9312", [HasV4TOps]>; |
| |
| // V5T Processors. |
| def : ProcNoItin<"arm10tdmi", [HasV5TOps]>; |
| def : ProcNoItin<"arm1020t", [HasV5TOps]>; |
| |
| // V5TE Processors. |
| def : ProcNoItin<"arm9e", [HasV5TEOps]>; |
| def : ProcNoItin<"arm926ej-s", [HasV5TEOps]>; |
| def : ProcNoItin<"arm946e-s", [HasV5TEOps]>; |
| def : ProcNoItin<"arm966e-s", [HasV5TEOps]>; |
| def : ProcNoItin<"arm968e-s", [HasV5TEOps]>; |
| def : ProcNoItin<"arm10e", [HasV5TEOps]>; |
| def : ProcNoItin<"arm1020e", [HasV5TEOps]>; |
| def : ProcNoItin<"arm1022e", [HasV5TEOps]>; |
| def : ProcNoItin<"xscale", [HasV5TEOps]>; |
| def : ProcNoItin<"iwmmxt", [HasV5TEOps]>; |
| |
| // V6 Processors. |
| def : Processor<"arm1136j-s", ARMV6Itineraries, [HasV6Ops]>; |
| def : Processor<"arm1136jf-s", ARMV6Itineraries, [HasV6Ops, FeatureVFP2, |
| FeatureHasSlowFPVMLx]>; |
| def : Processor<"arm1176jz-s", ARMV6Itineraries, [HasV6Ops]>; |
| def : Processor<"arm1176jzf-s", ARMV6Itineraries, [HasV6Ops, FeatureVFP2, |
| FeatureHasSlowFPVMLx]>; |
| def : Processor<"mpcorenovfp", ARMV6Itineraries, [HasV6Ops]>; |
| def : Processor<"mpcore", ARMV6Itineraries, [HasV6Ops, FeatureVFP2, |
| FeatureHasSlowFPVMLx]>; |
| |
| // V6M Processors. |
| def : Processor<"cortex-m0", ARMV6Itineraries, [HasV6Ops, FeatureNoARM, |
| FeatureDB, FeatureMClass]>; |
| |
| // V6T2 Processors. |
| def : Processor<"arm1156t2-s", ARMV6Itineraries, [HasV6T2Ops, |
| FeatureDSPThumb2]>; |
| def : Processor<"arm1156t2f-s", ARMV6Itineraries, [HasV6T2Ops, FeatureVFP2, |
| FeatureHasSlowFPVMLx, |
| FeatureDSPThumb2]>; |
| |
| // V7a Processors. |
| def : Processor<"cortex-a8", CortexA8Itineraries, |
| [ProcA8, HasV7Ops, FeatureNEON, FeatureDB, |
| FeatureDSPThumb2, FeatureHasRAS]>; |
| def : Processor<"cortex-a9", CortexA9Itineraries, |
| [ProcA9, HasV7Ops, FeatureNEON, FeatureDB, |
| FeatureDSPThumb2, FeatureHasRAS]>; |
| def : Processor<"cortex-a9-mp", CortexA9Itineraries, |
| [ProcA9, HasV7Ops, FeatureNEON, FeatureDB, |
| FeatureDSPThumb2, FeatureMP, |
| FeatureHasRAS]>; |
| |
| // V7M Processors. |
| def : ProcNoItin<"cortex-m3", [HasV7Ops, |
| FeatureThumb2, FeatureNoARM, FeatureDB, |
| FeatureHWDiv, FeatureMClass]>; |
| |
| // V7EM Processors. |
| def : ProcNoItin<"cortex-m4", [HasV7Ops, |
| FeatureThumb2, FeatureNoARM, FeatureDB, |
| FeatureHWDiv, FeatureDSPThumb2, |
| FeatureT2XtPk, FeatureVFP2, |
| FeatureVFPOnlySP, FeatureMClass]>; |
| |
| //===----------------------------------------------------------------------===// |
| // Register File Description |
| //===----------------------------------------------------------------------===// |
| |
| include "ARMRegisterInfo.td" |
| |
| include "ARMCallingConv.td" |
| |
| //===----------------------------------------------------------------------===// |
| // Instruction Descriptions |
| //===----------------------------------------------------------------------===// |
| |
| include "ARMInstrInfo.td" |
| |
| def ARMInstrInfo : InstrInfo; |
| |
| |
| //===----------------------------------------------------------------------===// |
| // Assembly printer |
| //===----------------------------------------------------------------------===// |
| // ARM Uses the MC printer for asm output, so make sure the TableGen |
| // AsmWriter bits get associated with the correct class. |
| def ARMAsmWriter : AsmWriter { |
| string AsmWriterClassName = "InstPrinter"; |
| bit isMCAsmWriter = 1; |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Declare the target which we are implementing |
| //===----------------------------------------------------------------------===// |
| |
| def ARM : Target { |
| // Pull in Instruction Info: |
| let InstructionSet = ARMInstrInfo; |
| |
| let AssemblyWriters = [ARMAsmWriter]; |
| } |
