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Add CRC32 instruction and SLI (vector)

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This commit is contained in:
gdkchan 2018-03-14 00:12:05 -03:00
parent 19564e570b
commit 553ba659c4
4 changed files with 205 additions and 10 deletions
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78
ChocolArm64/Instruction/ASoftFallback.cs
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@ -38,6 +38,84 @@ namespace ChocolArm64.Instruction
return (ulong)Size;
}
private const uint Crc32RevPoly = 0xedb88320;
private const uint Crc32cRevPoly = 0x82f63b78;
public static uint Crc32b(uint Crc, byte Val) => Crc32 (Crc, Crc32RevPoly, Val);
public static uint Crc32h(uint Crc, byte Val) => Crc32h(Crc, Crc32RevPoly, Val);
public static uint Crc32w(uint Crc, byte Val) => Crc32w(Crc, Crc32RevPoly, Val);
public static uint Crc32x(uint Crc, byte Val) => Crc32x(Crc, Crc32RevPoly, Val);
public static uint Crc32cb(uint Crc, byte Val) => Crc32 (Crc, Crc32cRevPoly, Val);
public static uint Crc32ch(uint Crc, byte Val) => Crc32h(Crc, Crc32cRevPoly, Val);
public static uint Crc32cw(uint Crc, byte Val) => Crc32w(Crc, Crc32cRevPoly, Val);
public static uint Crc32cx(uint Crc, byte Val) => Crc32x(Crc, Crc32cRevPoly, Val);
private static uint Crc32h(uint Crc, uint Poly, ushort Val)
{
Crc = Crc32(Crc, Poly, (byte)(Val >> 0));
Crc = Crc32(Crc, Poly, (byte)(Val >> 8));
return Crc;
}
private static uint Crc32w(uint Crc, uint Poly, uint Val)
{
Crc = Crc32(Crc, Poly, (byte)(Val >> 0));
Crc = Crc32(Crc, Poly, (byte)(Val >> 8));
Crc = Crc32(Crc, Poly, (byte)(Val >> 16));
Crc = Crc32(Crc, Poly, (byte)(Val >> 24));
return Crc;
}
private static uint Crc32x(uint Crc, uint Poly, ulong Val)
{
Crc = Crc32(Crc, Poly, (byte)(Val >> 0));
Crc = Crc32(Crc, Poly, (byte)(Val >> 8));
Crc = Crc32(Crc, Poly, (byte)(Val >> 16));
Crc = Crc32(Crc, Poly, (byte)(Val >> 24));
Crc = Crc32(Crc, Poly, (byte)(Val >> 32));
Crc = Crc32(Crc, Poly, (byte)(Val >> 40));
Crc = Crc32(Crc, Poly, (byte)(Val >> 48));
Crc = Crc32(Crc, Poly, (byte)(Val >> 56));
return Crc;
}
private static uint Crc32(uint Crc, uint Poly, byte Val)
{
Crc ^= Val;
for (int Bit = 7; Bit >= 0; Bit--)
{
uint Mask = (uint)(-(int)(Crc & 1));
Crc = (Crc >> 1) ^ (Poly & Mask);
}
return Crc;
}
public static uint ReverseBits8(uint Value)
{
Value = ((Value & 0xaa) >> 1) | ((Value & 0x55) << 1);
Value = ((Value & 0xcc) >> 2) | ((Value & 0x33) << 2);
Value = ((Value & 0xf0) >> 4) | ((Value & 0x0f) << 4);
return Value;
}
public static uint ReverseBits16(uint Value)
{
Value = ((Value & 0xaaaa) >> 1) | ((Value & 0x5555) << 1);
Value = ((Value & 0xcccc) >> 2) | ((Value & 0x3333) << 2);
Value = ((Value & 0xf0f0) >> 4) | ((Value & 0x0f0f) << 4);
Value = ((Value & 0xff00) >> 8) | ((Value & 0x00ff) << 8);
return Value;
}
public static uint ReverseBits32(uint Value)
{
Value = ((Value & 0xaaaaaaaa) >> 1) | ((Value & 0x55555555) << 1);