diff options
Diffstat (limited to 'ChocolArm64/Instruction/ASoftFallback.cs')
| -rw-r--r-- | ChocolArm64/Instruction/ASoftFallback.cs | 196 |
1 files changed, 110 insertions, 86 deletions
diff --git a/ChocolArm64/Instruction/ASoftFallback.cs b/ChocolArm64/Instruction/ASoftFallback.cs index a4d12dd6..40898578 100644 --- a/ChocolArm64/Instruction/ASoftFallback.cs +++ b/ChocolArm64/Instruction/ASoftFallback.cs @@ -11,6 +11,107 @@ namespace ChocolArm64.Instruction Context.EmitCall(typeof(ASoftFallback), MthdName); } +#region "Saturating" + 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; + } + } + + public static long UnarySignedSatQAbsOrNeg(long op, AThreadState State) + { + if (op == long.MinValue) + { + SetFpsrQCFlag(State); + + return long.MaxValue; + } + else + { + return op; + } + } + public static long BinarySignedSatQAdd(long op1, long op2, AThreadState State) { long Add = op1 + op2; @@ -185,99 +286,15 @@ 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; State.Fpsr |= 1 << QCFlagBit; } +#endregion +#region "Count" public static ulong CountLeadingSigns(ulong Value, int Size) { Value ^= Value >> 1; @@ -325,7 +342,9 @@ namespace ChocolArm64.Instruction return (Value >> 4) + (Value & 0x0f); } +#endregion +#region "Crc32" private const uint Crc32RevPoly = 0xedb88320; private const uint Crc32cRevPoly = 0x82f63b78; @@ -384,7 +403,9 @@ namespace ChocolArm64.Instruction return Crc; } +#endregion +#region "Reverse" public static uint ReverseBits8(uint Value) { Value = ((Value & 0xaa) >> 1) | ((Value & 0x55) << 1); @@ -453,7 +474,9 @@ namespace ChocolArm64.Instruction throw new ArgumentException(nameof(Size)); } +#endregion +#region "MultiplyHigh" public static long SMulHi128(long LHS, long RHS) { long Result = (long)UMulHi128((ulong)LHS, (ulong)RHS); @@ -479,5 +502,6 @@ namespace ChocolArm64.Instruction return LHigh * RHigh + Z0 + (Z1 >> 32); } +#endregion } } |