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Andrey K. Choi
2025-10-09 09:57:24 +09:00
commit 4d551bd74f
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output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Math/Raw/Interleave.cs Normal file
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namespace Org.BouncyCastle.Math.Raw;
internal abstract class Interleave
{
private const ulong M32 = 1431655765uL;
private const ulong M64 = 6148914691236517205uL;
private const ulong M64R = 12297829382473034410uL;
internal static uint Expand8to16(uint x)
{
x &= 0xFF;
x = (x | (x << 4)) & 0xF0F;
x = (x | (x << 2)) & 0x3333;
x = (x | (x << 1)) & 0x5555;
return x;
}
internal static uint Expand16to32(uint x)
{
x &= 0xFFFF;
x = (x | (x << 8)) & 0xFF00FF;
x = (x | (x << 4)) & 0xF0F0F0F;
x = (x | (x << 2)) & 0x33333333;
x = (x | (x << 1)) & 0x55555555;
return x;
}
internal static ulong Expand32to64(uint x)
{
uint num = (x ^ (x >> 8)) & 0xFF00;
x ^= num ^ (num << 8);
num = (x ^ (x >> 4)) & 0xF000F0;
x ^= num ^ (num << 4);
num = (x ^ (x >> 2)) & 0xC0C0C0C;
x ^= num ^ (num << 2);
num = (x ^ (x >> 1)) & 0x22222222;
x ^= num ^ (num << 1);
return (((ulong)(x >> 1) & 0x55555555uL) << 32) | ((ulong)x & 0x55555555uL);
}
internal static void Expand64To128(ulong x, ulong[] z, int zOff)
{
ulong num = (x ^ (x >> 16)) & 0xFFFF0000u;
x ^= num ^ (num << 16);
num = (x ^ (x >> 8)) & 0xFF000000FF00L;
x ^= num ^ (num << 8);
num = (x ^ (x >> 4)) & 0xF000F000F000F0L;
x ^= num ^ (num << 4);
num = (x ^ (x >> 2)) & 0xC0C0C0C0C0C0C0CL;
x ^= num ^ (num << 2);
num = (x ^ (x >> 1)) & 0x2222222222222222L;
x ^= num ^ (num << 1);
z[zOff] = x & 0x5555555555555555L;
z[zOff + 1] = (x >> 1) & 0x5555555555555555L;
}
internal static void Expand64To128Rev(ulong x, ulong[] z, int zOff)
{
ulong num = (x ^ (x >> 16)) & 0xFFFF0000u;
x ^= num ^ (num << 16);
num = (x ^ (x >> 8)) & 0xFF000000FF00L;
x ^= num ^ (num << 8);
num = (x ^ (x >> 4)) & 0xF000F000F000F0L;
x ^= num ^ (num << 4);
num = (x ^ (x >> 2)) & 0xC0C0C0C0C0C0C0CL;
x ^= num ^ (num << 2);
num = (x ^ (x >> 1)) & 0x2222222222222222L;
x ^= num ^ (num << 1);
z[zOff] = x & 0xAAAAAAAAAAAAAAAAuL;
z[zOff + 1] = (x << 1) & 0xAAAAAAAAAAAAAAAAuL;
}
internal static uint Shuffle(uint x)
{
uint num = (x ^ (x >> 8)) & 0xFF00;
x ^= num ^ (num << 8);
num = (x ^ (x >> 4)) & 0xF000F0;
x ^= num ^ (num << 4);
num = (x ^ (x >> 2)) & 0xC0C0C0C;
x ^= num ^ (num << 2);
num = (x ^ (x >> 1)) & 0x22222222;
x ^= num ^ (num << 1);
return x;
}
internal static ulong Shuffle(ulong x)
{
ulong num = (x ^ (x >> 16)) & 0xFFFF0000u;
x ^= num ^ (num << 16);
num = (x ^ (x >> 8)) & 0xFF000000FF00L;
x ^= num ^ (num << 8);
num = (x ^ (x >> 4)) & 0xF000F000F000F0L;
x ^= num ^ (num << 4);
num = (x ^ (x >> 2)) & 0xC0C0C0C0C0C0C0CL;
x ^= num ^ (num << 2);
num = (x ^ (x >> 1)) & 0x2222222222222222L;
x ^= num ^ (num << 1);
return x;
}
internal static uint Shuffle2(uint x)
{
uint num = (x ^ (x >> 7)) & 0xAA00AA;
x ^= num ^ (num << 7);
num = (x ^ (x >> 14)) & 0xCCCC;
x ^= num ^ (num << 14);
num = (x ^ (x >> 4)) & 0xF000F0;
x ^= num ^ (num << 4);
num = (x ^ (x >> 8)) & 0xFF00;
x ^= num ^ (num << 8);
return x;
}
internal static uint Unshuffle(uint x)
{
uint num = (x ^ (x >> 1)) & 0x22222222;
x ^= num ^ (num << 1);
num = (x ^ (x >> 2)) & 0xC0C0C0C;
x ^= num ^ (num << 2);
num = (x ^ (x >> 4)) & 0xF000F0;
x ^= num ^ (num << 4);
num = (x ^ (x >> 8)) & 0xFF00;
x ^= num ^ (num << 8);
return x;
}
internal static ulong Unshuffle(ulong x)
{
ulong num = (x ^ (x >> 1)) & 0x2222222222222222L;
x ^= num ^ (num << 1);
num = (x ^ (x >> 2)) & 0xC0C0C0C0C0C0C0CL;
x ^= num ^ (num << 2);
num = (x ^ (x >> 4)) & 0xF000F000F000F0L;
x ^= num ^ (num << 4);
num = (x ^ (x >> 8)) & 0xFF000000FF00L;
x ^= num ^ (num << 8);
num = (x ^ (x >> 16)) & 0xFFFF0000u;
x ^= num ^ (num << 16);
return x;
}
internal static uint Unshuffle2(uint x)
{
uint num = (x ^ (x >> 8)) & 0xFF00;
x ^= num ^ (num << 8);
num = (x ^ (x >> 4)) & 0xF000F0;
x ^= num ^ (num << 4);
num = (x ^ (x >> 14)) & 0xCCCC;
x ^= num ^ (num << 14);
num = (x ^ (x >> 7)) & 0xAA00AA;
x ^= num ^ (num << 7);
return x;
}
}