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MethodImplOptions.AggressiveOptimization & MethodImplOptions.AggressiveInlining optimized. Small optimizations.

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mlemanczyk committed 2025-12-10 19:59:51 +01:00
1 parent 7a242b3bfa
commit 05d3061c47
23 files changed
+628 -559
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PerfectNumbers.Core/ExponentRemainderStepperCpu.cs
+12 -12
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@@ -18,7 +18,7 @@ internal struct ExponentRemainderStepperCpu(in MontgomeryDivisorData divisor, ul
private ulong _currentMontgomery = divisor.MontgomeryOne;
private static readonly ConcurrentDictionary<(ulong Cycle, ulong Delta), ulong> _cycleDeltaCache = new();
[MethodImpl(MethodImplOptions.AggressiveInlining)]
[MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
public readonly bool MatchesDivisor(in MontgomeryDivisorData divisor, ulong cycleLength)
=> _modulus == divisor.Modulus && _nPrime == divisor.NPrime && _montgomeryOne == divisor.MontgomeryOne && _cycleLength == cycleLength;
@@ -26,7 +26,7 @@ internal struct ExponentRemainderStepperCpu(in MontgomeryDivisorData divisor, ul
/// Clears the cached Montgomery residue so the stepper can be reused for another divisor.
/// Callers must reinitialize the stepper before consuming any residues after a reset.
/// </summary>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
[MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
public void Reset()
{
PreviousExponent = 0UL;
@@ -39,7 +39,7 @@ internal struct ExponentRemainderStepperCpu(in MontgomeryDivisorData divisor, ul
/// </summary>
/// <param name="exponent">First exponent evaluated for the current divisor. The caller must reuse the same divisor metadata.</param>
/// <returns>The canonical residue produced by <c>2^exponent mod divisor</c>.</returns>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
[MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
public ulong InitializeCpu(ulong exponent)
{
InitializeCpuState(exponent);
@@ -51,7 +51,7 @@ internal struct ExponentRemainderStepperCpu(in MontgomeryDivisorData divisor, ul
/// </summary>
/// <param name="exponent">First exponent evaluated for the current divisor. Must match the divisor passed to the constructor.</param>
/// <returns><see langword="true"/> when the seed exponent produces a Montgomery residue equal to one.</returns>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
[MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
public bool InitializeCpuIsUnity(ulong exponent)
{
InitializeCpuState(exponent);
@@ -64,7 +64,7 @@ internal struct ExponentRemainderStepperCpu(in MontgomeryDivisorData divisor, ul
/// </summary>
/// <param name="exponent">Next exponent in the ascending sequence. Callers must never move backwards or reuse an older exponent.</param>
/// <returns>The canonical residue produced by <c>2^exponent mod divisor</c>.</returns>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
[MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
public ulong ComputeNextCpu(ulong exponent)
{
ulong delta = exponent - PreviousExponent;
@@ -84,7 +84,7 @@ internal struct ExponentRemainderStepperCpu(in MontgomeryDivisorData divisor, ul
/// </summary>
/// <param name="exponent">Next exponent in the ascending sequence.</param>
/// <returns><see langword="true"/> when the canonical residue equals one.</returns>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
[MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
public bool ComputeNextIsUnity(ulong exponent)
{
ulong delta = exponent - PreviousExponent;
@@ -105,8 +105,8 @@ internal struct ExponentRemainderStepperCpu(in MontgomeryDivisorData divisor, ul
/// <param name="montgomeryResult">Residue in Montgomery form produced externally for the configured divisor.</param>
/// <param name="isUnity">Outputs whether the supplied residue equals Montgomery one.</param>
/// <returns><see langword="true"/> when the residue is accepted and cached.</returns>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public bool TryInitializeFromMontgomeryResult(ulong exponent, ulong montgomeryResult, out bool isUnity)
[MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
public bool TryInitializeFromMontgomeryResult(ulong exponent, ulong montgomeryResult, out bool isUnity)
{
_currentMontgomery = montgomeryResult;
PreviousExponent = exponent;
@@ -122,7 +122,7 @@ internal struct ExponentRemainderStepperCpu(in MontgomeryDivisorData divisor, ul
/// <param name="montgomeryDelta">Montgomery residue delta corresponding to the exponent gap.</param>
/// <param name="isUnity">Outputs whether the resulting residue equals Montgomery one.</param>
/// <returns><see langword="true"/> when the advance succeeds.</returns>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
[MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
public bool TryAdvanceWithMontgomeryDelta(ulong exponent, ulong montgomeryDelta, out bool isUnity)
{
ulong delta = exponent - PreviousExponent;
@@ -149,7 +149,7 @@ internal struct ExponentRemainderStepperCpu(in MontgomeryDivisorData divisor, ul
return true;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
[MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
private void InitializeCpuState(ulong exponent)
{
ulong rotation = ReduceDelta(exponent);
@@ -159,10 +159,10 @@ internal struct ExponentRemainderStepperCpu(in MontgomeryDivisorData divisor, ul
PreviousExponent = exponent;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
[MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
private readonly ulong ReduceCurrent() => _currentMontgomery.MontgomeryMultiplyCpu(1UL, _modulus, _nPrime);
[MethodImpl(MethodImplOptions.AggressiveInlining)]
[MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
private readonly ulong ReduceDelta(ulong delta)
{
ulong cycleLength = _cycleLength;