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Due to an erratum in some versions of LEON, we must insert a NOP after any LD or LDF instruction to ensure the processor has time to load the value correctly before using it. This pass will implement that erratum fix. The code will have no effect for other Sparc, but non-LEON processors. Differential Review: http://reviews.llvm.org/D20353 llvm-svn: 270417
157 lines
5.9 KiB
TableGen
157 lines
5.9 KiB
TableGen
//===-- Sparc.td - Describe the Sparc Target Machine -------*- tablegen -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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//
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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// Target-independent interfaces which we are implementing
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//===----------------------------------------------------------------------===//
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include "llvm/Target/Target.td"
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//===----------------------------------------------------------------------===//
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// SPARC Subtarget features.
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//
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def FeatureV9
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: SubtargetFeature<"v9", "IsV9", "true",
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"Enable SPARC-V9 instructions">;
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def FeatureV8Deprecated
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: SubtargetFeature<"deprecated-v8", "V8DeprecatedInsts", "true",
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"Enable deprecated V8 instructions in V9 mode">;
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def FeatureVIS
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: SubtargetFeature<"vis", "IsVIS", "true",
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"Enable UltraSPARC Visual Instruction Set extensions">;
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def FeatureVIS2
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: SubtargetFeature<"vis2", "IsVIS2", "true",
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"Enable Visual Instruction Set extensions II">;
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def FeatureVIS3
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: SubtargetFeature<"vis3", "IsVIS3", "true",
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"Enable Visual Instruction Set extensions III">;
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def FeatureLeon
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: SubtargetFeature<"leon", "IsLeon", "true",
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"Enable LEON extensions">;
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def FeatureHardQuad
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: SubtargetFeature<"hard-quad-float", "HasHardQuad", "true",
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"Enable quad-word floating point instructions">;
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def UsePopc : SubtargetFeature<"popc", "UsePopc", "true",
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"Use the popc (population count) instruction">;
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def FeatureSoftFloat : SubtargetFeature<"soft-float", "UseSoftFloat", "true",
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"Use software emulation for floating point">;
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//==== Features added predmoninantly for LEON subtarget support
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include "LeonFeatures.td"
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//===----------------------------------------------------------------------===//
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// Register File, Calling Conv, Instruction Descriptions
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//===----------------------------------------------------------------------===//
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include "SparcRegisterInfo.td"
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include "SparcCallingConv.td"
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include "SparcSchedule.td"
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include "SparcInstrInfo.td"
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def SparcInstrInfo : InstrInfo;
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def SparcAsmParser : AsmParser {
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bit ShouldEmitMatchRegisterName = 0;
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}
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//===----------------------------------------------------------------------===//
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// SPARC processors supported.
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//===----------------------------------------------------------------------===//
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class Proc<string Name, list<SubtargetFeature> Features>
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: Processor<Name, NoItineraries, Features>;
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def : Proc<"generic", []>;
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def : Proc<"v7", []>;
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def : Proc<"v8", []>;
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def : Proc<"supersparc", []>;
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def : Proc<"sparclite", []>;
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def : Proc<"f934", []>;
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def : Proc<"hypersparc", []>;
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def : Proc<"sparclite86x", []>;
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def : Proc<"sparclet", []>;
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def : Proc<"tsc701", []>;
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def : Proc<"myriad2", []>;
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def : Proc<"myriad2.1", []>;
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def : Proc<"myriad2.2", []>;
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def : Proc<"v9", [FeatureV9]>;
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def : Proc<"ultrasparc", [FeatureV9, FeatureV8Deprecated, FeatureVIS]>;
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def : Proc<"ultrasparc3", [FeatureV9, FeatureV8Deprecated, FeatureVIS,
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FeatureVIS2]>;
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def : Proc<"niagara", [FeatureV9, FeatureV8Deprecated, FeatureVIS,
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FeatureVIS2]>;
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def : Proc<"niagara2", [FeatureV9, FeatureV8Deprecated, UsePopc,
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FeatureVIS, FeatureVIS2]>;
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def : Proc<"niagara3", [FeatureV9, FeatureV8Deprecated, UsePopc,
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FeatureVIS, FeatureVIS2]>;
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def : Proc<"niagara4", [FeatureV9, FeatureV8Deprecated, UsePopc,
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FeatureVIS, FeatureVIS2, FeatureVIS3]>;
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// LEON 2 FT generic
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def : Processor<"leon2", LEON2Itineraries,
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[FeatureLeon]>;
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// LEON 2 FT (AT697E)
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// TO DO: Place-holder: Processor specific features will be added *very* soon here.
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def : Processor<"at697e", LEON2Itineraries,
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[FeatureLeon, InsertNOPLoad]>;
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// LEON 2 FT (AT697F)
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// TO DO: Place-holder: Processor specific features will be added *very* soon here.
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def : Processor<"at697f", LEON2Itineraries,
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[FeatureLeon, InsertNOPLoad]>;
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// LEON 3 FT generic
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def : Processor<"leon3", LEON3Itineraries,
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[FeatureLeon, UMACSMACSupport]>;
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// LEON 3 FT (UT699). Provides features for the UT699 processor
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// - covers all the erratum fixes for LEON3, but does not support the CASA instruction.
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def : Processor<"ut699", LEON3Itineraries,
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[FeatureLeon, InsertNOPLoad]>;
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// LEON3 FT (GR712RC). Provides features for the GR712RC processor.
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// - covers all the erratum fixed for LEON3 and support for the CASA instruction.
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def : Processor<"gr712rc", LEON3Itineraries,
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[FeatureLeon, LeonCASA]>;
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// LEON 4 FT generic
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def : Processor<"leon4", LEON4Itineraries,
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[FeatureLeon, UMACSMACSupport, LeonCASA]>;
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// LEON 4 FT (GR740)
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// TO DO: Place-holder: Processor specific features will be added *very* soon here.
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def : Processor<"gr740", LEON4Itineraries,
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[FeatureLeon, UMACSMACSupport, LeonCASA]>;
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//===----------------------------------------------------------------------===//
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// Declare the target which we are implementing
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//===----------------------------------------------------------------------===//
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def SparcAsmWriter : AsmWriter {
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string AsmWriterClassName = "InstPrinter";
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int PassSubtarget = 1;
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int Variant = 0;
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}
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def Sparc : Target {
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// Pull in Instruction Info:
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let InstructionSet = SparcInstrInfo;
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let AssemblyParsers = [SparcAsmParser];
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let AssemblyWriters = [SparcAsmWriter];
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}
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