ug_intro_to_megafunctions

May2013

IntroductiontoMegafunctionIPCores

UG-01056-3.0

Alteraprovidesafreelibraryofparameterizableintellectualproperty(IP)blocks,calledmegafunctions,that

emegafunctionstoaccessarchitecture-specificfeatureswithinmemory,DSPblocks,shiftregisters,andothersimpleandcomplexfunctions.

YoucanquicklydefineamegafunctionvariationintheMegaWizardPlug-InManagerGUI.Alternatively,youcandefineandinstantiatemegafunctionsdirectlyinHDLfiles.TheQuartusIIsoftwareautomaticallyinfersmegafunctioncodewheneverHDLcodecanbeoptimizedbymegafunctionsubstitution.

AlteraProvidedMegafunctions

TheQuartusIIsoftwareimplementsyourspecifiedsystemorIPcoreparametersandgeneratesfilesforsynthesisandsimulationintheQuartusIIsoftwareandotherEDAtools.TheQuartusIIsoftwareincludesthefollowingmegafunctionsforusewithoutadditionallicense.

ArithmeticMegafunctions

TheQuartusIIsoftwareincludesthesearithmeticmegafunctions.

MegafunctionName

Function

LPM_ABSLPM_ADD_SUBLPM_COMPARELPM_COUNTERLPM_DIVIDELPM_MULTALTACCUMULATEALTECCALTMEMMULTALTMULT_ACCUMALTMULT_ADD

AbsolutevalueAdder/SubtractorComparatorCounterDividerMultiplierAccumulatorECCEncoder/Decoder

MemoryConstantCoefficientMultiplierMultiply-AccumulatorMultiply-Adder

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