//===- 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 features.
//
def FeatureVFP2 : SubtargetFeature<"vfp2", "ARMFPUType", "VFPv2",
"Enable VFP2 instructions">;
def FeatureVFP3 : SubtargetFeature<"vfp3", "ARMFPUType", "VFPv3",
"Enable VFP3 instructions">;
def FeatureNEON : SubtargetFeature<"neon", "ARMFPUType", "NEON",
"Enable NEON instructions">;
def FeatureThumb2 : SubtargetFeature<"thumb2", "ThumbMode", "Thumb2",
"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 architectures.
def ArchV4T : SubtargetFeature<"v4t", "ARMArchVersion", "V4T",
"ARM v4T">;
def ArchV5T : SubtargetFeature<"v5t", "ARMArchVersion", "V5T",
"ARM v5T">;
def ArchV5TE : SubtargetFeature<"v5te", "ARMArchVersion", "V5TE",
"ARM v5TE, v5TEj, v5TExp">;
def ArchV6 : SubtargetFeature<"v6", "ARMArchVersion", "V6",
"ARM v6">;
def ArchV6M : SubtargetFeature<"v6m", "ARMArchVersion", "V6M",
"ARM v6m",
[FeatureNoARM, FeatureDB]>;
def ArchV6T2 : SubtargetFeature<"v6t2", "ARMArchVersion", "V6T2",
"ARM v6t2",
[FeatureThumb2, FeatureDSPThumb2]>;
def ArchV7A : SubtargetFeature<"v7a", "ARMArchVersion", "V7A",
"ARM v7A",
[FeatureThumb2, FeatureNEON, FeatureDB,
FeatureDSPThumb2]>;
def ArchV7M : SubtargetFeature<"v7m", "ARMArchVersion", "V7M",
"ARM v7M",
[FeatureThumb2, FeatureNoARM, FeatureDB,
FeatureHWDiv]>;
def ArchV7EM : SubtargetFeature<"v7em", "ARMArchVersion", "V7EM",
"ARM v7E-M",
[FeatureThumb2, FeatureNoARM, FeatureDB,
FeatureHWDiv, FeatureDSPThumb2,
FeatureT2XtPk]>;
def ArchV7K : SubtargetFeature<"v7k", "ARMArchVersion", "V7K",
"ARM v7K (Apple specific)",
[FeatureThumb2, FeatureDB]>;
//===----------------------------------------------------------------------===//
// ARM Processors supported.
//
include "ARMSchedule.td"
// ARM processor families.
def ProcOthers : SubtargetFeature<"others", "ARMProcFamily", "Others",
"One of the other 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", [ArchV4T]>;
def : ProcNoItin<"arm7tdmi-s", [ArchV4T]>;
def : ProcNoItin<"arm710t", [ArchV4T]>;
def : ProcNoItin<"arm720t", [ArchV4T]>;
def : ProcNoItin<"arm9", [ArchV4T]>;
def : ProcNoItin<"arm9tdmi", [ArchV4T]>;
def : ProcNoItin<"arm920", [ArchV4T]>;
def : ProcNoItin<"arm920t", [ArchV4T]>;
def : ProcNoItin<"arm922t", [ArchV4T]>;
def : ProcNoItin<"arm940t", [ArchV4T]>;
def : ProcNoItin<"ep9312", [ArchV4T]>;
// V5T Processors.
def : ProcNoItin<"arm10tdmi", [ArchV5T]>;
def : ProcNoItin<"arm1020t", [ArchV5T]>;
// V5TE Processors.
def : ProcNoItin<"arm9e", [ArchV5TE]>;
def : ProcNoItin<"arm926ej-s", [ArchV5TE]>;
def : ProcNoItin<"arm946e-s", [ArchV5TE]>;
def : ProcNoItin<"arm966e-s", [ArchV5TE]>;
def : ProcNoItin<"arm968e-s", [ArchV5TE]>;
def : ProcNoItin<"arm10e", [ArchV5TE]>;
def : ProcNoItin<"arm1020e", [ArchV5TE]>;
def : ProcNoItin<"arm1022e", [ArchV5TE]>;
def : ProcNoItin<"xscale", [ArchV5TE]>;
def : ProcNoItin<"iwmmxt", [ArchV5TE]>;
// V6 Processors.
def : Processor<"arm1136j-s", ARMV6Itineraries, [ArchV6]>;
def : Processor<"arm1136jf-s", ARMV6Itineraries, [ArchV6, FeatureVFP2,
FeatureHasSlowFPVMLx]>;
def : Processor<"arm1176jz-s", ARMV6Itineraries, [ArchV6]>;
def : Processor<"arm1176jzf-s", ARMV6Itineraries, [ArchV6, FeatureVFP2,
FeatureHasSlowFPVMLx]>;
def : Processor<"mpcorenovfp", ARMV6Itineraries, [ArchV6]>;
def : Processor<"mpcore", ARMV6Itineraries, [ArchV6, FeatureVFP2,
FeatureHasSlowFPVMLx]>;
// V6M Processors.
def : Processor<"cortex-m0", ARMV6Itineraries, [ArchV6M]>;
// V6T2 Processors.
def : Processor<"arm1156t2-s", ARMV6Itineraries, [ArchV6T2]>;
def : Processor<"arm1156t2f-s", ARMV6Itineraries, [ArchV6T2, FeatureVFP2,
FeatureHasSlowFPVMLx]>;
// V7 Processors.
def : Processor<"cortex-a8", CortexA8Itineraries,
[ArchV7A, ProcA8]>;
def : Processor<"cortex-a9", CortexA9Itineraries,
[ArchV7A, ProcA9]>;
def : Processor<"cortex-a9-mp", CortexA9Itineraries,
[ArchV7A, ProcA9, FeatureMP]>;
// V7M Processors.
def : ProcNoItin<"cortex-m3", [ArchV7M]>;
def : ProcNoItin<"cortex-m4", [ArchV7EM, 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];
}