//===- 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 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 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">; // 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, FeatureDSPThumb2]>; 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 Features> : Processor; // 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]>; // V6T2 Processors. def : Processor<"arm1156t2-s", ARMV6Itineraries, [HasV6T2Ops]>; def : Processor<"arm1156t2f-s", ARMV6Itineraries, [HasV6T2Ops, FeatureVFP2, FeatureHasSlowFPVMLx]>; // V7a Processors. def : Processor<"cortex-a8", CortexA8Itineraries, [ProcA8, HasV7Ops, FeatureNEON, FeatureDB, FeatureDSPThumb2]>; def : Processor<"cortex-a9", CortexA9Itineraries, [ProcA9, HasV7Ops, FeatureNEON, FeatureDB, FeatureDSPThumb2]>; def : Processor<"cortex-a9-mp", CortexA9Itineraries, [ProcA9, HasV7Ops, FeatureNEON, FeatureDB, FeatureDSPThumb2, FeatureMP]>; // V7M Processors. def : ProcNoItin<"cortex-m3", [HasV7Ops, FeatureThumb2, FeatureNoARM, FeatureDB, FeatureHWDiv]>; // V7EM Processors. def : ProcNoItin<"cortex-m4", [HasV7Ops, FeatureThumb2, FeatureNoARM, FeatureDB, FeatureHWDiv, FeatureDSPThumb2, FeatureT2XtPk, FeatureVFP2, FeatureVFPOnlySP]>; //===----------------------------------------------------------------------===// // 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]; }