BigInteger shifting mapped to constants for an improved performance.
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@@ -0,0 +1,387 @@
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using System.Numerics;
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using System.Runtime.CompilerServices;
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using BenchmarkDotNet.Attributes;
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using PerfectNumbers.Core;
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namespace EvenPerfectBitScanner.Benchmarks
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{
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public class Pow2ProviderBigIntegerBenchmarks
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{
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[Benchmark(Baseline = true)]
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public BigInteger ByShifting()
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{
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BigInteger result = BigInteger.Zero;
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for (int i = 0; i <= 63; i++)
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{
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result = BigInteger.One << i;
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}
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return result;
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}
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[Benchmark]
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public BigInteger ByMapping()
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{
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BigInteger result = BigInteger.Zero;
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for (int i = 0; i <= 63; i++)
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{
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result = Pow2Provider.BigInteger(i);
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}
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return result;
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}
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}
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public class Pow2MinusOneeProviderBigIntegerBenchmarks
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{
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[Benchmark(Baseline = true)]
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public BigInteger ByShifting()
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{
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BigInteger result = BigInteger.Zero;
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for (int i = 0; i <= 63; i++)
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{
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result = (BigInteger.One << i) - BigInteger.One;
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}
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return result;
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}
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[Benchmark]
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public BigInteger ByMapping()
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{
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BigInteger result = BigInteger.Zero;
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for (int i = 0; i <= 63; i++)
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{
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result = Pow2Provider.BigIntegerMinusOne(i);
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}
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return result;
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}
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}
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public class Pow2ProviderULongBenchmarks
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{
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public static class ULongNumbers
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{
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public const ulong TwoMinusOne = 2L - 1L;
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public const ulong FourMinusOne = 4L - 1L;
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public const ulong EightMinusOne = 8L - 1L;
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public const ulong SixteenMinusOne = 16L - 1L;
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public const ulong ThirtyTwoMinusOne = 32L - 1L;
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public const ulong SixtyFourMinusOne = 64L - 1L;
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public const ulong OneHundredTwentyEightMinusOne = 128L - 1L;
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public const ulong TwoHundredFiftySixMinusOne = 256L - 1L;
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public const ulong FiveHundredTwelveMinusOne = 512L - 1L;
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public const ulong OneThousandTwentyFourMinusOne = 1_024L - 1L;
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public const ulong TwoThousandFortyEightMinusOne = 2_048L - 1L;
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public const ulong FourThousandNinetySixMinusOne = 4_096L - 1L;
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public const ulong EightThousandOneHundredNinetyTwoMinusOne = 8_192L - 1L;
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public const ulong SixteenThousandThreeHundredEightyFourMinusOne = 16_384L - 1L;
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public const ulong ThirtyTwoThousandSevenHundredSixtyEightMinusOne = 32_768L - 1L;
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public const ulong SixtyFiveThousandFiveHundredThirtySixMinusOne = 65_536L - 1L;
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public const ulong OneHundredThirtyOneThousandSeventyTwoMinusOne = 131_072L - 1L;
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public const ulong TwoHundredSixtyTwoThousandOneHundredFortyFourMinusOne = 262_144L - 1L;
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public const ulong FiveHundredTwentyFourThousandTwoHundredEightyEightMinusOne = 524_288L - 1L;
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public const ulong OneMillionFortyEightThousandFiveHundredSeventySixMinusOne = 1_048_576L - 1L;
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public const ulong TwoMillionNinetySevenThousandOneHundredFiftyTwoMinusOne = 2_097_152L - 1L;
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public const ulong FourMillionOneHundredNinetyFourThousandThreeHundredFourMinusOne = 4_194_304L - 1L;
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public const ulong EightMillionThreeHundredEightyEightThousandSixHundredEightMinusOne = 8_388_608L - 1L;
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public const ulong SixteenMillionSevenHundredSeventySevenThousandTwoHundredSixteenMinusOne = 16_777_216L - 1L;
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public const ulong ThirtyThreeMillionFiveHundredFiftyFourThousandFourHundredThirtyTwoMinusOne = 33_554_432L - 1L;
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public const ulong SixtySevenMillionOneHundredEightThousandEightHundredSixtyFourMinusOne = 67_108_864L - 1L;
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public const ulong OneHundredThirtyFourMillionTwoHundredSeventeenThousandSevenHundredTwentyEightMinusOne = 134_217_728L - 1L;
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public const ulong TwoHundredSixtyEightMillionFourHundredThirtyFiveThousandFourHundredFiftySixMinusOne = 268_435_456L - 1L;
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public const ulong FiveHundredThirtySixMillionEightHundredSeventyThousandNineHundredTwelveMinusOne = 536_870_912L - 1L;
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public const ulong OneBillionSeventyThreeMillionSevenHundredFortyOneThousandEightHundredTwentyFourMinusOne = 1_073_741_824L - 1L;
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public const ulong TwoBillionOneHundredFortySevenMillionFourHundredEightyThreeThousandSixHundredFortyEightMinusOne = 2_147_483_648L - 1L;
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public const ulong FourBillionTwoHundredNinetyFourMillionNineHundredSixtySevenThousandTwoHundredNinetySixMinusOne = 4_294_967_296L - 1L;
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public const ulong EightBillionFiveHundredEightyNineMillionNineHundredThirtyFourThousandFiveHundredNinetyTwoMinusOne = 8_589_934_592L - 1L;
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public const ulong SeventeenBillionOneHundredSeventyNineMillionEightHundredSixtyNineThousandOneHundredEightyFourMinusOne = 17_179_869_184L - 1L;
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public const ulong ThirtyFourBillionThreeHundredFiftyNineMillionSevenHundredThirtyEightThousandThreeHundredSixtyEightMinusOne = 34_359_738_368L - 1L;
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public const ulong SixtyEightBillionSevenHundredNineteenMillionFourHundredSeventySixThousandSevenHundredThirtySixMinusOne = 68_719_476_736L - 1L;
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public const ulong OneHundredThirtySevenBillionFourHundredThirtyEightMillionNineHundredFiftyThreeThousandFourHundredSeventyTwoMinusOne = 137_438_953_472L - 1L;
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public const ulong TwoHundredSeventyFourBillionEightHundredSeventySevenMillionNineHundredSixThousandNineHundredFortyFourMinusOne = 274_877_906_944L - 1L;
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public const ulong FiveHundredFortyNineBillionSevenHundredFiftyFiveMillionEightHundredThirteenThousandEightHundredEightyEightMinusOne = 549_755_813_888L - 1L;
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public const ulong OneTrillionNinetyNineBillionFiveHundredElevenMillionSixHundredTwentySevenThousandSevenHundredSeventySixMinusOne = 1_099_511_627_776L - 1L;
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public const ulong TwoTrillionOneHundredNinetyNineBillionTwentyThreeMillionTwoHundredFiftyFiveThousandFiveHundredFiftyTwoMinusOne = 2_199_023_255_552L - 1L;
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public const ulong FourTrillionThreeHundredNinetyEightBillionFortySixMillionFiveHundredElevenThousandOneHundredFourMinusOne = 4_398_046_511_104L - 1L;
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public const ulong EightTrillionSevenHundredNinetySixBillionNinetyThreeMillionTwentyTwoThousandTwoHundredEightMinusOne = 8_796_093_022_208L - 1L;
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public const ulong SeventeenTrillionFiveHundredNinetyTwoBillionOneHundredEightySixMillionFortyFourThousandFourHundredSixteenMinusOne = 17_592_186_044_416L - 1L;
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public const ulong ThirtyFiveTrillionOneHundredEightyFourBillionThreeHundredSeventyTwoMillionEightyEightThousandEightHundredThirtyTwoMinusOne = 35_184_372_088_832L - 1L;
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public const ulong SeventyTrillionThreeHundredSixtyEightBillionSevenHundredFortyFourMillionOneHundredSeventySevenThousandSixHundredSixtyFourMinusOne = 70_368_744_177_664L - 1L;
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public const ulong OneHundredFortyTrillionSevenHundredThirtySevenBillionFourHundredEightyEightMillionThreeHundredFiftyFiveThousandThreeHundredTwentyEightMinusOne = 140_737_488_355_328L - 1L;
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public const ulong TwoHundredEightyOneTrillionFourHundredSeventyFourBillionNineHundredSeventySixMillionSevenHundredTenThousandSixHundredFiftySixMinusOne = 281_474_976_710_656L - 1L;
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public const ulong FiveHundredSixtyTwoTrillionNineHundredFortyNineBillionNineHundredFiftyThreeMillionFourHundredTwentyOneThousandThreeHundredTwelveMinusOne = 562_949_953_421_312L - 1L;
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public const ulong OneQuadrillionOneHundredTwentyFiveTrillionEightHundredNinetyNineBillionNineHundredSixMillionEightHundredFortyTwoThousandSixHundredTwentyFourMinusOne = 1_125_899_906_842_624L - 1L;
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public const ulong TwoQuadrillionTwoHundredFiftyOneTrillionSevenHundredNinetyNineBillionEightHundredThirteenMillionSixHundredEightyFiveThousandTwoHundredFortyEightMinusOne = 2_251_799_813_685_248L - 1L;
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public const ulong FourQuadrillionFiveHundredThreeTrillionFiveHundredNinetyNineBillionSixHundredTwentySevenMillionThreeHundredSeventyThousandFourHundredNinetySixMinusOne = 4_503_599_627_370_496L - 1L;
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public const ulong NineQuadrillionSevenTrillionOneHundredNinetyNineBillionTwoHundredFiftyFourMillionSevenHundredFortyThousandNineHundredNinetyTwoMinusOne = 9_007_199_254_740_992L - 1L;
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public const ulong EighteenQuadrillionFourteenTrillionThreeHundredNinetyEightBillionFiveHundredEightMillionEightHundredEightyThousandOneHundredEightyFourMinusOne = 18_014_398_509_481_984L - 1L;
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public const ulong ThirtySixQuadrillionTwentyEightTrillionSevenHundredNinetySevenBillionSeventeenMillionSevenHundredSixtyThousandThreeHundredSixtyEightMinusOne = 36_028_797_018_963_968L - 1L;
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public const ulong SeventyTwoQuadrillionFiftySevenTrillionFiveHundredNinetyFourBillionThirtyFiveMillionFiveHundredTwentyThousandSevenHundredThirtySixMinusOne = 72_057_594_037_927_936L - 1L;
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public const ulong OneHundredFortyFourQuadrillionOneHundredFifteenTrillionOneHundredEightyEightBillionSeventyOneMillionFortyOneThousandFourHundredSeventyTwoMinusOne = 144_115_188_075_855_872L - 1L;
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public const ulong TwoHundredEightyEightQuadrillionTwoHundredThirtyTrillionThreeHundredSeventySixBillionOneHundredFortyTwoMillionEightyTwoThousandNineHundredFortyFourMinusOne = 288_230_376_151_711_744L - 1L;
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public const ulong FiveHundredSeventySixQuadrillionFourHundredSixtyTrillionSevenHundredFiftyTwoBillionTwoHundredEightyFourMillionOneHundredSixtyFiveThousandEightHundredEightyEightMinusOne = 576_460_752_303_423_488L - 1L;
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public const ulong OneQuintillionOneHundredFiftyTwoQuadrillionNineHundredTwentyOneTrillionFiveHundredFourBillionSixHundredSixtyEightMillionThreeHundredThirtyOneThousandSevenHundredSeventySixMinusOne = 1_152_921_504_606_846_976L - 1L;
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public const ulong TwoQuintillionThreeHundredFiveQuadrillionEightHundredFortyThreeTrillionNineBillionThreeHundredThirtySixMillionSixHundredSixtyThreeThousandFiveHundredFiftyTwoMinusOne = 2_305_843_009_213_693_952L - 1L;
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public const ulong FourQuintillionSixHundredElevenQuadrillionSixHundredEightySevenTrillionEightHundredSixteenBillionSixHundredSeventyThreeMillionTwoHundredTwentySevenThousandOneHundredFourMinusOne = 4_611_686_018_427_387_904L - 1L;
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public const ulong NineQuintillionTwoHundredTwentyThreeQuadrillionThreeHundredSeventyTwoTrillionThirtySixBillionEightHundredFiftyFourMillionSevenHundredSeventyFiveThousandEightHundredEightMinusOne = 9_223_372_036_854_775_808UL - 1UL;
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
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public static ulong ULongMinusOne(int i) => i switch
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{
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0 => 0UL,
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1 => ULongNumbers.TwoMinusOne,
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2 => ULongNumbers.FourMinusOne,
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3 => ULongNumbers.EightMinusOne,
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4 => ULongNumbers.SixteenMinusOne,
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5 => ULongNumbers.ThirtyTwoMinusOne,
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6 => ULongNumbers.SixtyFourMinusOne,
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7 => ULongNumbers.OneHundredTwentyEightMinusOne,
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8 => ULongNumbers.TwoHundredFiftySixMinusOne,
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9 => ULongNumbers.FiveHundredTwelveMinusOne,
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10 => ULongNumbers.OneThousandTwentyFourMinusOne,
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11 => ULongNumbers.TwoThousandFortyEightMinusOne,
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12 => ULongNumbers.FourThousandNinetySixMinusOne,
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13 => ULongNumbers.EightThousandOneHundredNinetyTwoMinusOne,
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14 => ULongNumbers.SixteenThousandThreeHundredEightyFourMinusOne,
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15 => ULongNumbers.ThirtyTwoThousandSevenHundredSixtyEightMinusOne,
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16 => ULongNumbers.SixtyFiveThousandFiveHundredThirtySixMinusOne,
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17 => ULongNumbers.OneHundredThirtyOneThousandSeventyTwoMinusOne,
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18 => ULongNumbers.TwoHundredSixtyTwoThousandOneHundredFortyFourMinusOne,
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19 => ULongNumbers.FiveHundredTwentyFourThousandTwoHundredEightyEightMinusOne,
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20 => ULongNumbers.OneMillionFortyEightThousandFiveHundredSeventySixMinusOne,
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21 => ULongNumbers.TwoMillionNinetySevenThousandOneHundredFiftyTwoMinusOne,
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22 => ULongNumbers.FourMillionOneHundredNinetyFourThousandThreeHundredFourMinusOne,
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23 => ULongNumbers.EightMillionThreeHundredEightyEightThousandSixHundredEightMinusOne,
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24 => ULongNumbers.SixteenMillionSevenHundredSeventySevenThousandTwoHundredSixteenMinusOne,
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25 => ULongNumbers.ThirtyThreeMillionFiveHundredFiftyFourThousandFourHundredThirtyTwoMinusOne,
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26 => ULongNumbers.SixtySevenMillionOneHundredEightThousandEightHundredSixtyFourMinusOne,
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27 => ULongNumbers.OneHundredThirtyFourMillionTwoHundredSeventeenThousandSevenHundredTwentyEightMinusOne,
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28 => ULongNumbers.TwoHundredSixtyEightMillionFourHundredThirtyFiveThousandFourHundredFiftySixMinusOne,
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29 => ULongNumbers.FiveHundredThirtySixMillionEightHundredSeventyThousandNineHundredTwelveMinusOne,
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30 => ULongNumbers.OneBillionSeventyThreeMillionSevenHundredFortyOneThousandEightHundredTwentyFourMinusOne,
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31 => ULongNumbers.TwoBillionOneHundredFortySevenMillionFourHundredEightyThreeThousandSixHundredFortyEightMinusOne,
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32 => ULongNumbers.FourBillionTwoHundredNinetyFourMillionNineHundredSixtySevenThousandTwoHundredNinetySixMinusOne,
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33 => ULongNumbers.EightBillionFiveHundredEightyNineMillionNineHundredThirtyFourThousandFiveHundredNinetyTwoMinusOne,
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34 => ULongNumbers.SeventeenBillionOneHundredSeventyNineMillionEightHundredSixtyNineThousandOneHundredEightyFourMinusOne,
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35 => ULongNumbers.ThirtyFourBillionThreeHundredFiftyNineMillionSevenHundredThirtyEightThousandThreeHundredSixtyEightMinusOne,
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36 => ULongNumbers.SixtyEightBillionSevenHundredNineteenMillionFourHundredSeventySixThousandSevenHundredThirtySixMinusOne,
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37 => ULongNumbers.OneHundredThirtySevenBillionFourHundredThirtyEightMillionNineHundredFiftyThreeThousandFourHundredSeventyTwoMinusOne,
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38 => ULongNumbers.TwoHundredSeventyFourBillionEightHundredSeventySevenMillionNineHundredSixThousandNineHundredFortyFourMinusOne,
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39 => ULongNumbers.FiveHundredFortyNineBillionSevenHundredFiftyFiveMillionEightHundredThirteenThousandEightHundredEightyEightMinusOne,
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40 => ULongNumbers.OneTrillionNinetyNineBillionFiveHundredElevenMillionSixHundredTwentySevenThousandSevenHundredSeventySixMinusOne,
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41 => ULongNumbers.TwoTrillionOneHundredNinetyNineBillionTwentyThreeMillionTwoHundredFiftyFiveThousandFiveHundredFiftyTwoMinusOne,
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42 => ULongNumbers.FourTrillionThreeHundredNinetyEightBillionFortySixMillionFiveHundredElevenThousandOneHundredFourMinusOne,
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43 => ULongNumbers.EightTrillionSevenHundredNinetySixBillionNinetyThreeMillionTwentyTwoThousandTwoHundredEightMinusOne,
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44 => ULongNumbers.SeventeenTrillionFiveHundredNinetyTwoBillionOneHundredEightySixMillionFortyFourThousandFourHundredSixteenMinusOne,
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45 => ULongNumbers.ThirtyFiveTrillionOneHundredEightyFourBillionThreeHundredSeventyTwoMillionEightyEightThousandEightHundredThirtyTwoMinusOne,
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46 => ULongNumbers.SeventyTrillionThreeHundredSixtyEightBillionSevenHundredFortyFourMillionOneHundredSeventySevenThousandSixHundredSixtyFourMinusOne,
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47 => ULongNumbers.OneHundredFortyTrillionSevenHundredThirtySevenBillionFourHundredEightyEightMillionThreeHundredFiftyFiveThousandThreeHundredTwentyEightMinusOne,
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48 => ULongNumbers.TwoHundredEightyOneTrillionFourHundredSeventyFourBillionNineHundredSeventySixMillionSevenHundredTenThousandSixHundredFiftySixMinusOne,
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49 => ULongNumbers.FiveHundredSixtyTwoTrillionNineHundredFortyNineBillionNineHundredFiftyThreeMillionFourHundredTwentyOneThousandThreeHundredTwelveMinusOne,
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50 => ULongNumbers.OneQuadrillionOneHundredTwentyFiveTrillionEightHundredNinetyNineBillionNineHundredSixMillionEightHundredFortyTwoThousandSixHundredTwentyFourMinusOne,
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51 => ULongNumbers.TwoQuadrillionTwoHundredFiftyOneTrillionSevenHundredNinetyNineBillionEightHundredThirteenMillionSixHundredEightyFiveThousandTwoHundredFortyEightMinusOne,
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52 => ULongNumbers.FourQuadrillionFiveHundredThreeTrillionFiveHundredNinetyNineBillionSixHundredTwentySevenMillionThreeHundredSeventyThousandFourHundredNinetySixMinusOne,
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53 => ULongNumbers.NineQuadrillionSevenTrillionOneHundredNinetyNineBillionTwoHundredFiftyFourMillionSevenHundredFortyThousandNineHundredNinetyTwoMinusOne,
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54 => ULongNumbers.EighteenQuadrillionFourteenTrillionThreeHundredNinetyEightBillionFiveHundredEightMillionEightHundredEightyThousandOneHundredEightyFourMinusOne,
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55 => ULongNumbers.ThirtySixQuadrillionTwentyEightTrillionSevenHundredNinetySevenBillionSeventeenMillionSevenHundredSixtyThousandThreeHundredSixtyEightMinusOne,
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56 => ULongNumbers.SeventyTwoQuadrillionFiftySevenTrillionFiveHundredNinetyFourBillionThirtyFiveMillionFiveHundredTwentyThousandSevenHundredThirtySixMinusOne,
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57 => ULongNumbers.OneHundredFortyFourQuadrillionOneHundredFifteenTrillionOneHundredEightyEightBillionSeventyOneMillionFortyOneThousandFourHundredSeventyTwoMinusOne,
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58 => ULongNumbers.TwoHundredEightyEightQuadrillionTwoHundredThirtyTrillionThreeHundredSeventySixBillionOneHundredFortyTwoMillionEightyTwoThousandNineHundredFortyFourMinusOne,
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59 => ULongNumbers.FiveHundredSeventySixQuadrillionFourHundredSixtyTrillionSevenHundredFiftyTwoBillionTwoHundredEightyFourMillionOneHundredSixtyFiveThousandEightHundredEightyEightMinusOne,
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60 => ULongNumbers.OneQuintillionOneHundredFiftyTwoQuadrillionNineHundredTwentyOneTrillionFiveHundredFourBillionSixHundredSixtyEightMillionThreeHundredThirtyOneThousandSevenHundredSeventySixMinusOne,
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61 => ULongNumbers.TwoQuintillionThreeHundredFiveQuadrillionEightHundredFortyThreeTrillionNineBillionThreeHundredThirtySixMillionSixHundredSixtyThreeThousandFiveHundredFiftyTwoMinusOne,
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62 => ULongNumbers.FourQuintillionSixHundredElevenQuadrillionSixHundredEightySevenTrillionEightHundredSixteenBillionSixHundredSeventyThreeMillionTwoHundredTwentySevenThousandOneHundredFourMinusOne,
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63 => ULongNumbers.NineQuintillionTwoHundredTwentyThreeQuadrillionThreeHundredSeventyTwoTrillionThirtySixBillionEightHundredFiftyFourMillionSevenHundredSeventyFiveThousandEightHundredEightMinusOne,
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_ => throw new ArgumentOutOfRangeException(nameof(i)),
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};
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[Benchmark(Baseline = true)]
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public ulong ByShifting()
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{
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ulong result = 0UL;
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for (int i = 0; i <= 63; i++)
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{
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result = (1UL << i) - 1UL;
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}
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return result;
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}
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[Benchmark]
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public ulong ByMapping()
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{
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ulong result = 0UL;
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for (int i = 0; i <= 63; i++)
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{
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result = ULongMinusOne(i);
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}
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return result;
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}
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}
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public class Pow2ProviderLongBenchmarks
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{
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public static class LongNumbers
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{
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public const long TwoMinusOne = 2L - 1L;
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public const long FourMinusOne = 4L - 1L;
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public const long EightMinusOne = 8L - 1L;
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public const long SixteenMinusOne = 16L - 1L;
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public const long ThirtyTwoMinusOne = 32L - 1L;
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public const long SixtyFourMinusOne = 64L - 1L;
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public const long OneHundredTwentyEightMinusOne = 128L - 1L;
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public const long TwoHundredFiftySixMinusOne = 256L - 1L;
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public const long FiveHundredTwelveMinusOne = 512L - 1L;
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public const long OneThousandTwentyFourMinusOne = 1_024L - 1L;
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public const long TwoThousandFortyEightMinusOne = 2_048L - 1L;
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public const long FourThousandNinetySixMinusOne = 4_096L - 1L;
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public const long EightThousandOneHundredNinetyTwoMinusOne = 8_192L - 1L;
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public const long SixteenThousandThreeHundredEightyFourMinusOne = 16_384L - 1L;
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public const long ThirtyTwoThousandSevenHundredSixtyEightMinusOne = 32_768L - 1L;
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public const long SixtyFiveThousandFiveHundredThirtySixMinusOne = 65_536L - 1L;
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public const long OneHundredThirtyOneThousandSeventyTwoMinusOne = 131_072L - 1L;
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public const long TwoHundredSixtyTwoThousandOneHundredFortyFourMinusOne = 262_144L - 1L;
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public const long FiveHundredTwentyFourThousandTwoHundredEightyEightMinusOne = 524_288L - 1L;
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public const long OneMillionFortyEightThousandFiveHundredSeventySixMinusOne = 1_048_576L - 1L;
|
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public const long TwoMillionNinetySevenThousandOneHundredFiftyTwoMinusOne = 2_097_152L - 1L;
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public const long FourMillionOneHundredNinetyFourThousandThreeHundredFourMinusOne = 4_194_304L - 1L;
|
||||
public const long EightMillionThreeHundredEightyEightThousandSixHundredEightMinusOne = 8_388_608L - 1L;
|
||||
public const long SixteenMillionSevenHundredSeventySevenThousandTwoHundredSixteenMinusOne = 16_777_216L - 1L;
|
||||
public const long ThirtyThreeMillionFiveHundredFiftyFourThousandFourHundredThirtyTwoMinusOne = 33_554_432L - 1L;
|
||||
public const long SixtySevenMillionOneHundredEightThousandEightHundredSixtyFourMinusOne = 67_108_864L - 1L;
|
||||
public const long OneHundredThirtyFourMillionTwoHundredSeventeenThousandSevenHundredTwentyEightMinusOne = 134_217_728L - 1L;
|
||||
public const long TwoHundredSixtyEightMillionFourHundredThirtyFiveThousandFourHundredFiftySixMinusOne = 268_435_456L - 1L;
|
||||
public const long FiveHundredThirtySixMillionEightHundredSeventyThousandNineHundredTwelveMinusOne = 536_870_912L - 1L;
|
||||
public const long OneBillionSeventyThreeMillionSevenHundredFortyOneThousandEightHundredTwentyFourMinusOne = 1_073_741_824L - 1L;
|
||||
public const long TwoBillionOneHundredFortySevenMillionFourHundredEightyThreeThousandSixHundredFortyEightMinusOne = 2_147_483_648L - 1L;
|
||||
public const long FourBillionTwoHundredNinetyFourMillionNineHundredSixtySevenThousandTwoHundredNinetySixMinusOne = 4_294_967_296L - 1L;
|
||||
public const long EightBillionFiveHundredEightyNineMillionNineHundredThirtyFourThousandFiveHundredNinetyTwoMinusOne = 8_589_934_592L - 1L;
|
||||
public const long SeventeenBillionOneHundredSeventyNineMillionEightHundredSixtyNineThousandOneHundredEightyFourMinusOne = 17_179_869_184L - 1L;
|
||||
public const long ThirtyFourBillionThreeHundredFiftyNineMillionSevenHundredThirtyEightThousandThreeHundredSixtyEightMinusOne = 34_359_738_368L - 1L;
|
||||
public const long SixtyEightBillionSevenHundredNineteenMillionFourHundredSeventySixThousandSevenHundredThirtySixMinusOne = 68_719_476_736L - 1L;
|
||||
public const long OneHundredThirtySevenBillionFourHundredThirtyEightMillionNineHundredFiftyThreeThousandFourHundredSeventyTwoMinusOne = 137_438_953_472L - 1L;
|
||||
public const long TwoHundredSeventyFourBillionEightHundredSeventySevenMillionNineHundredSixThousandNineHundredFortyFourMinusOne = 274_877_906_944L - 1L;
|
||||
public const long FiveHundredFortyNineBillionSevenHundredFiftyFiveMillionEightHundredThirteenThousandEightHundredEightyEightMinusOne = 549_755_813_888L - 1L;
|
||||
public const long OneTrillionNinetyNineBillionFiveHundredElevenMillionSixHundredTwentySevenThousandSevenHundredSeventySixMinusOne = 1_099_511_627_776L - 1L;
|
||||
public const long TwoTrillionOneHundredNinetyNineBillionTwentyThreeMillionTwoHundredFiftyFiveThousandFiveHundredFiftyTwoMinusOne = 2_199_023_255_552L - 1L;
|
||||
public const long FourTrillionThreeHundredNinetyEightBillionFortySixMillionFiveHundredElevenThousandOneHundredFourMinusOne = 4_398_046_511_104L - 1L;
|
||||
public const long EightTrillionSevenHundredNinetySixBillionNinetyThreeMillionTwentyTwoThousandTwoHundredEightMinusOne = 8_796_093_022_208L - 1L;
|
||||
public const long SeventeenTrillionFiveHundredNinetyTwoBillionOneHundredEightySixMillionFortyFourThousandFourHundredSixteenMinusOne = 17_592_186_044_416L - 1L;
|
||||
public const long ThirtyFiveTrillionOneHundredEightyFourBillionThreeHundredSeventyTwoMillionEightyEightThousandEightHundredThirtyTwoMinusOne = 35_184_372_088_832L - 1L;
|
||||
public const long SeventyTrillionThreeHundredSixtyEightBillionSevenHundredFortyFourMillionOneHundredSeventySevenThousandSixHundredSixtyFourMinusOne = 70_368_744_177_664L - 1L;
|
||||
public const long OneHundredFortyTrillionSevenHundredThirtySevenBillionFourHundredEightyEightMillionThreeHundredFiftyFiveThousandThreeHundredTwentyEightMinusOne = 140_737_488_355_328L - 1L;
|
||||
public const long TwoHundredEightyOneTrillionFourHundredSeventyFourBillionNineHundredSeventySixMillionSevenHundredTenThousandSixHundredFiftySixMinusOne = 281_474_976_710_656L - 1L;
|
||||
public const long FiveHundredSixtyTwoTrillionNineHundredFortyNineBillionNineHundredFiftyThreeMillionFourHundredTwentyOneThousandThreeHundredTwelveMinusOne = 562_949_953_421_312L - 1L;
|
||||
public const long OneQuadrillionOneHundredTwentyFiveTrillionEightHundredNinetyNineBillionNineHundredSixMillionEightHundredFortyTwoThousandSixHundredTwentyFourMinusOne = 1_125_899_906_842_624L - 1L;
|
||||
public const long TwoQuadrillionTwoHundredFiftyOneTrillionSevenHundredNinetyNineBillionEightHundredThirteenMillionSixHundredEightyFiveThousandTwoHundredFortyEightMinusOne = 2_251_799_813_685_248L - 1L;
|
||||
public const long FourQuadrillionFiveHundredThreeTrillionFiveHundredNinetyNineBillionSixHundredTwentySevenMillionThreeHundredSeventyThousandFourHundredNinetySixMinusOne = 4_503_599_627_370_496L - 1L;
|
||||
public const long NineQuadrillionSevenTrillionOneHundredNinetyNineBillionTwoHundredFiftyFourMillionSevenHundredFortyThousandNineHundredNinetyTwoMinusOne = 9_007_199_254_740_992L - 1L;
|
||||
public const long EighteenQuadrillionFourteenTrillionThreeHundredNinetyEightBillionFiveHundredEightMillionEightHundredEightyThousandOneHundredEightyFourMinusOne = 18_014_398_509_481_984L - 1L;
|
||||
public const long ThirtySixQuadrillionTwentyEightTrillionSevenHundredNinetySevenBillionSeventeenMillionSevenHundredSixtyThousandThreeHundredSixtyEightMinusOne = 36_028_797_018_963_968L - 1L;
|
||||
public const long SeventyTwoQuadrillionFiftySevenTrillionFiveHundredNinetyFourBillionThirtyFiveMillionFiveHundredTwentyThousandSevenHundredThirtySixMinusOne = 72_057_594_037_927_936L - 1L;
|
||||
public const long OneHundredFortyFourQuadrillionOneHundredFifteenTrillionOneHundredEightyEightBillionSeventyOneMillionFortyOneThousandFourHundredSeventyTwoMinusOne = 144_115_188_075_855_872L - 1L;
|
||||
public const long TwoHundredEightyEightQuadrillionTwoHundredThirtyTrillionThreeHundredSeventySixBillionOneHundredFortyTwoMillionEightyTwoThousandNineHundredFortyFourMinusOne = 288_230_376_151_711_744L - 1L;
|
||||
public const long FiveHundredSeventySixQuadrillionFourHundredSixtyTrillionSevenHundredFiftyTwoBillionTwoHundredEightyFourMillionOneHundredSixtyFiveThousandEightHundredEightyEightMinusOne = 576_460_752_303_423_488L - 1L;
|
||||
public const long OneQuintillionOneHundredFiftyTwoQuadrillionNineHundredTwentyOneTrillionFiveHundredFourBillionSixHundredSixtyEightMillionThreeHundredThirtyOneThousandSevenHundredSeventySixMinusOne = 1_152_921_504_606_846_976L - 1L;
|
||||
public const long TwoQuintillionThreeHundredFiveQuadrillionEightHundredFortyThreeTrillionNineBillionThreeHundredThirtySixMillionSixHundredSixtyThreeThousandFiveHundredFiftyTwoMinusOne = 2_305_843_009_213_693_952L - 1L;
|
||||
public const long FourQuintillionSixHundredElevenQuadrillionSixHundredEightySevenTrillionEightHundredSixteenBillionSixHundredSeventyThreeMillionTwoHundredTwentySevenThousandOneHundredFourMinusOne = 4_611_686_018_427_387_904L - 1L;
|
||||
}
|
||||
|
||||
[MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
|
||||
public static long LongMinusOne(int i) => i switch
|
||||
{
|
||||
0 => 0L,
|
||||
1 => LongNumbers.TwoMinusOne,
|
||||
2 => LongNumbers.FourMinusOne,
|
||||
3 => LongNumbers.EightMinusOne,
|
||||
4 => LongNumbers.SixteenMinusOne,
|
||||
5 => LongNumbers.ThirtyTwoMinusOne,
|
||||
6 => LongNumbers.SixtyFourMinusOne,
|
||||
7 => LongNumbers.OneHundredTwentyEightMinusOne,
|
||||
8 => LongNumbers.TwoHundredFiftySixMinusOne,
|
||||
9 => LongNumbers.FiveHundredTwelveMinusOne,
|
||||
10 => LongNumbers.OneThousandTwentyFourMinusOne,
|
||||
11 => LongNumbers.TwoThousandFortyEightMinusOne,
|
||||
12 => LongNumbers.FourThousandNinetySixMinusOne,
|
||||
13 => LongNumbers.EightThousandOneHundredNinetyTwoMinusOne,
|
||||
14 => LongNumbers.SixteenThousandThreeHundredEightyFourMinusOne,
|
||||
15 => LongNumbers.ThirtyTwoThousandSevenHundredSixtyEightMinusOne,
|
||||
16 => LongNumbers.SixtyFiveThousandFiveHundredThirtySixMinusOne,
|
||||
17 => LongNumbers.OneHundredThirtyOneThousandSeventyTwoMinusOne,
|
||||
18 => LongNumbers.TwoHundredSixtyTwoThousandOneHundredFortyFourMinusOne,
|
||||
19 => LongNumbers.FiveHundredTwentyFourThousandTwoHundredEightyEightMinusOne,
|
||||
20 => LongNumbers.OneMillionFortyEightThousandFiveHundredSeventySixMinusOne,
|
||||
21 => LongNumbers.TwoMillionNinetySevenThousandOneHundredFiftyTwoMinusOne,
|
||||
22 => LongNumbers.FourMillionOneHundredNinetyFourThousandThreeHundredFourMinusOne,
|
||||
23 => LongNumbers.EightMillionThreeHundredEightyEightThousandSixHundredEightMinusOne,
|
||||
24 => LongNumbers.SixteenMillionSevenHundredSeventySevenThousandTwoHundredSixteenMinusOne,
|
||||
25 => LongNumbers.ThirtyThreeMillionFiveHundredFiftyFourThousandFourHundredThirtyTwoMinusOne,
|
||||
26 => LongNumbers.SixtySevenMillionOneHundredEightThousandEightHundredSixtyFourMinusOne,
|
||||
27 => LongNumbers.OneHundredThirtyFourMillionTwoHundredSeventeenThousandSevenHundredTwentyEightMinusOne,
|
||||
28 => LongNumbers.TwoHundredSixtyEightMillionFourHundredThirtyFiveThousandFourHundredFiftySixMinusOne,
|
||||
29 => LongNumbers.FiveHundredThirtySixMillionEightHundredSeventyThousandNineHundredTwelveMinusOne,
|
||||
30 => LongNumbers.OneBillionSeventyThreeMillionSevenHundredFortyOneThousandEightHundredTwentyFourMinusOne,
|
||||
31 => LongNumbers.TwoBillionOneHundredFortySevenMillionFourHundredEightyThreeThousandSixHundredFortyEightMinusOne,
|
||||
32 => LongNumbers.FourBillionTwoHundredNinetyFourMillionNineHundredSixtySevenThousandTwoHundredNinetySixMinusOne,
|
||||
33 => LongNumbers.EightBillionFiveHundredEightyNineMillionNineHundredThirtyFourThousandFiveHundredNinetyTwoMinusOne,
|
||||
34 => LongNumbers.SeventeenBillionOneHundredSeventyNineMillionEightHundredSixtyNineThousandOneHundredEightyFourMinusOne,
|
||||
35 => LongNumbers.ThirtyFourBillionThreeHundredFiftyNineMillionSevenHundredThirtyEightThousandThreeHundredSixtyEightMinusOne,
|
||||
36 => LongNumbers.SixtyEightBillionSevenHundredNineteenMillionFourHundredSeventySixThousandSevenHundredThirtySixMinusOne,
|
||||
37 => LongNumbers.OneHundredThirtySevenBillionFourHundredThirtyEightMillionNineHundredFiftyThreeThousandFourHundredSeventyTwoMinusOne,
|
||||
38 => LongNumbers.TwoHundredSeventyFourBillionEightHundredSeventySevenMillionNineHundredSixThousandNineHundredFortyFourMinusOne,
|
||||
39 => LongNumbers.FiveHundredFortyNineBillionSevenHundredFiftyFiveMillionEightHundredThirteenThousandEightHundredEightyEightMinusOne,
|
||||
40 => LongNumbers.OneTrillionNinetyNineBillionFiveHundredElevenMillionSixHundredTwentySevenThousandSevenHundredSeventySixMinusOne,
|
||||
41 => LongNumbers.TwoTrillionOneHundredNinetyNineBillionTwentyThreeMillionTwoHundredFiftyFiveThousandFiveHundredFiftyTwoMinusOne,
|
||||
42 => LongNumbers.FourTrillionThreeHundredNinetyEightBillionFortySixMillionFiveHundredElevenThousandOneHundredFourMinusOne,
|
||||
43 => LongNumbers.EightTrillionSevenHundredNinetySixBillionNinetyThreeMillionTwentyTwoThousandTwoHundredEightMinusOne,
|
||||
44 => LongNumbers.SeventeenTrillionFiveHundredNinetyTwoBillionOneHundredEightySixMillionFortyFourThousandFourHundredSixteenMinusOne,
|
||||
45 => LongNumbers.ThirtyFiveTrillionOneHundredEightyFourBillionThreeHundredSeventyTwoMillionEightyEightThousandEightHundredThirtyTwoMinusOne,
|
||||
46 => LongNumbers.SeventyTrillionThreeHundredSixtyEightBillionSevenHundredFortyFourMillionOneHundredSeventySevenThousandSixHundredSixtyFourMinusOne,
|
||||
47 => LongNumbers.OneHundredFortyTrillionSevenHundredThirtySevenBillionFourHundredEightyEightMillionThreeHundredFiftyFiveThousandThreeHundredTwentyEightMinusOne,
|
||||
48 => LongNumbers.TwoHundredEightyOneTrillionFourHundredSeventyFourBillionNineHundredSeventySixMillionSevenHundredTenThousandSixHundredFiftySixMinusOne,
|
||||
49 => LongNumbers.FiveHundredSixtyTwoTrillionNineHundredFortyNineBillionNineHundredFiftyThreeMillionFourHundredTwentyOneThousandThreeHundredTwelveMinusOne,
|
||||
50 => LongNumbers.OneQuadrillionOneHundredTwentyFiveTrillionEightHundredNinetyNineBillionNineHundredSixMillionEightHundredFortyTwoThousandSixHundredTwentyFourMinusOne,
|
||||
51 => LongNumbers.TwoQuadrillionTwoHundredFiftyOneTrillionSevenHundredNinetyNineBillionEightHundredThirteenMillionSixHundredEightyFiveThousandTwoHundredFortyEightMinusOne,
|
||||
52 => LongNumbers.FourQuadrillionFiveHundredThreeTrillionFiveHundredNinetyNineBillionSixHundredTwentySevenMillionThreeHundredSeventyThousandFourHundredNinetySixMinusOne,
|
||||
53 => LongNumbers.NineQuadrillionSevenTrillionOneHundredNinetyNineBillionTwoHundredFiftyFourMillionSevenHundredFortyThousandNineHundredNinetyTwoMinusOne,
|
||||
54 => LongNumbers.EighteenQuadrillionFourteenTrillionThreeHundredNinetyEightBillionFiveHundredEightMillionEightHundredEightyThousandOneHundredEightyFourMinusOne,
|
||||
55 => LongNumbers.ThirtySixQuadrillionTwentyEightTrillionSevenHundredNinetySevenBillionSeventeenMillionSevenHundredSixtyThousandThreeHundredSixtyEightMinusOne,
|
||||
56 => LongNumbers.SeventyTwoQuadrillionFiftySevenTrillionFiveHundredNinetyFourBillionThirtyFiveMillionFiveHundredTwentyThousandSevenHundredThirtySixMinusOne,
|
||||
57 => LongNumbers.OneHundredFortyFourQuadrillionOneHundredFifteenTrillionOneHundredEightyEightBillionSeventyOneMillionFortyOneThousandFourHundredSeventyTwoMinusOne,
|
||||
58 => LongNumbers.TwoHundredEightyEightQuadrillionTwoHundredThirtyTrillionThreeHundredSeventySixBillionOneHundredFortyTwoMillionEightyTwoThousandNineHundredFortyFourMinusOne,
|
||||
59 => LongNumbers.FiveHundredSeventySixQuadrillionFourHundredSixtyTrillionSevenHundredFiftyTwoBillionTwoHundredEightyFourMillionOneHundredSixtyFiveThousandEightHundredEightyEightMinusOne,
|
||||
60 => LongNumbers.OneQuintillionOneHundredFiftyTwoQuadrillionNineHundredTwentyOneTrillionFiveHundredFourBillionSixHundredSixtyEightMillionThreeHundredThirtyOneThousandSevenHundredSeventySixMinusOne,
|
||||
61 => LongNumbers.TwoQuintillionThreeHundredFiveQuadrillionEightHundredFortyThreeTrillionNineBillionThreeHundredThirtySixMillionSixHundredSixtyThreeThousandFiveHundredFiftyTwoMinusOne,
|
||||
62 => LongNumbers.FourQuintillionSixHundredElevenQuadrillionSixHundredEightySevenTrillionEightHundredSixteenBillionSixHundredSeventyThreeMillionTwoHundredTwentySevenThousandOneHundredFourMinusOne,
|
||||
_ => throw new ArgumentOutOfRangeException(nameof(i)),
|
||||
};
|
||||
|
||||
[Benchmark(Baseline = true)]
|
||||
public long ByShifting()
|
||||
{
|
||||
long result = 0L;
|
||||
for (int i = 0; i <= 62; i++)
|
||||
{
|
||||
result = (1L << i) - 1L;
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
[Benchmark]
|
||||
public long ByMapping()
|
||||
{
|
||||
long result = 0L;
|
||||
for (int i = 0; i <= 62; i++)
|
||||
{
|
||||
result = LongMinusOne(i);
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in new issue
Block a user