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Update ASoftFallback.cs

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LDj3SNuD 2018-07-04 22:06:31 +02:00 • committed by GitHub
parent c6d0dc1334
commit 17430bea77
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1 changed files with 27 additions and 14 deletions
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41
ChocolArm64/Instruction/ASoftFallback.cs
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@ -17,17 +17,16 @@ namespace ChocolArm64.Instruction
public static ulong CountLeadingZeros(ulong Value, int Size)
{
int HighBit = Size - 1;
Value <<= 64 - Size;
for (int Bit = HighBit; Bit >= 0; Bit--)
{
if (((Value >> Bit) & 1) != 0)
{
return (ulong)(HighBit - Bit);
}
}
Value |= Value >> 1;
Value |= Value >> 2;
Value |= Value >> 4;
if (Size >= 15) Value |= Value >> 8 ;
if (Size >= 31) Value |= Value >> 16;
if (Size >= 63) Value |= Value >> 32;
return (ulong)Size;
return CountSetBits64(~Value >> (64 - Size), Size);
}
public static uint CountSetBits8(uint Value)
@ -38,6 +37,18 @@ namespace ChocolArm64.Instruction
return (Value >> 4) + (Value & 0x0f);
}
private static ulong CountSetBits64(ulong Value, int Size)
{
Value = ((Value >> 1 ) & 0x5555555555555555) + (Value & 0x5555555555555555);
Value = ((Value >> 2 ) & 0x3333333333333333) + (Value & 0x3333333333333333);
Value = ((Value >> 4 ) + Value) & 0x0f0f0f0f0f0f0f0f;
if (Size >= 15) Value += Value >> 8 ;
if (Size >= 31) Value += Value >> 16;
if (Size >= 63) Value += Value >> 32;
return Value & 0xff;
}
private const uint Crc32RevPoly = 0xedb88320;
private const uint Crc32cRevPoly = 0x82f63b78;
@ -61,8 +72,8 @@ namespace ChocolArm64.Instruction
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 >> 0 ));
Crc = Crc32(Crc, Poly, (byte)(Val >> 8 ));
Crc = Crc32(Crc, Poly, (byte)(Val >> 16));
Crc = Crc32(Crc, Poly, (byte)(Val >> 24));
@ -71,8 +82,8 @@ namespace ChocolArm64.Instruction
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 >> 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));
@ -168,9 +179,10 @@ namespace ChocolArm64.Instruction
public static long SMulHi128(long LHS, long RHS)
{
long Result = (long)UMulHi128((ulong)(LHS), (ulong)(RHS));
long Result = (long)UMulHi128((ulong)LHS, (ulong)RHS);
if (LHS < 0) Result -= RHS;
if (RHS < 0) Result -= LHS;
return Result;
}
@ -187,6 +199,7 @@ namespace ChocolArm64.Instruction
ulong Z1 = T & 0xFFFFFFFF;
ulong Z0 = T >> 32;
Z1 += LLow * RHigh;
return LHigh * RHigh + Z0 + (Z1 >> 32);
}
}