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Update ASoftFallback.cs

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LDj3SNuD 2018-08-04 14:06:26 +02:00 • committed by GitHub
parent 99139cf477
commit 8ae609dbf1
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1 changed files with 104 additions and 0 deletions
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104
ChocolArm64/Instruction/ASoftFallback.cs
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@ -93,6 +93,9 @@ namespace ChocolArm64.Instruction
{
if (op1 <= (ulong)long.MaxValue)
{
// op1 from ulong.MinValue to (ulong)long.MaxValue
// op2 from long.MinValue to long.MaxValue
long Add = (long)op1 + op2;
if ((~op2 & Add) < 0L)
@ -108,12 +111,18 @@ namespace ChocolArm64.Instruction
}
else if (op2 >= 0L)
{
// op1 from (ulong)long.MaxValue + 1UL to ulong.MaxValue
// op2 from (long)ulong.MinValue to long.MaxValue
SetFpsrQCFlag(State);
return long.MaxValue;
}
else
{
// op1 from (ulong)long.MaxValue + 1UL to ulong.MaxValue
// op2 from long.MinValue to (long)ulong.MinValue - 1L
ulong Add = op1 + (ulong)op2;
if (Add > (ulong)long.MaxValue)
@ -133,6 +142,9 @@ namespace ChocolArm64.Instruction
{
if (op1 >= 0L)
{
// op1 from (long)ulong.MinValue to long.MaxValue
// op2 from ulong.MinValue to ulong.MaxValue
ulong Add = (ulong)op1 + op2;
if ((Add < (ulong)op1) && (Add < op2))
@ -148,10 +160,16 @@ namespace ChocolArm64.Instruction
}
else if (op2 > (ulong)long.MaxValue)
{
// op1 from long.MinValue to (long)ulong.MinValue - 1L
// op2 from (ulong)long.MaxValue + 1UL to ulong.MaxValue
return (ulong)op1 + op2;
}
else
{
// op1 from long.MinValue to (long)ulong.MinValue - 1L
// op2 from ulong.MinValue to (ulong)long.MaxValue
long Add = op1 + (long)op2;
if (Add < (long)ulong.MinValue)
@ -167,6 +185,92 @@ namespace ChocolArm64.Instruction
}
}
public static long SignedSrcSignedDstSatQ(long op, int Size, AThreadState State)
{
int ESize = 8 << Size;
long TMaxValue = (1L << (ESize - 1)) - 1L;
long TMinValue = -(1L << (ESize - 1));
if (op > TMaxValue)
{
SetFpsrQCFlag(State);
return TMaxValue;
}
else if (op < TMinValue)
{
SetFpsrQCFlag(State);
return TMinValue;
}
else
{
return op;
}
}
public static ulong SignedSrcUnsignedDstSatQ(long op, int Size, AThreadState State)
{
int ESize = 8 << Size;
ulong TMaxValue = (1UL << ESize) - 1UL;
ulong TMinValue = 0UL;
if (op > (long)TMaxValue)
{
SetFpsrQCFlag(State);
return TMaxValue;
}
else if (op < (long)TMinValue)
{
SetFpsrQCFlag(State);
return TMinValue;
}
else
{
return (ulong)op;
}
}
public static long UnsignedSrcSignedDstSatQ(ulong op, int Size, AThreadState State)
{
int ESize = 8 << Size;
long TMaxValue = (1L << (ESize - 1)) - 1L;
if (op > (ulong)TMaxValue)
{
SetFpsrQCFlag(State);
return TMaxValue;
}
else
{
return (long)op;
}
}
public static ulong UnsignedSrcUnsignedDstSatQ(ulong op, int Size, AThreadState State)
{
int ESize = 8 << Size;
ulong TMaxValue = (1UL << ESize) - 1UL;
if (op > TMaxValue)
{
SetFpsrQCFlag(State);
return TMaxValue;
}
else
{
return op;
}
}
private static void SetFpsrQCFlag(AThreadState State)
{
const int QCFlagBit = 27;