diff options
Diffstat (limited to 'ARMeilleure/Instructions/SoftFallback.cs')
| -rw-r--r-- | ARMeilleure/Instructions/SoftFallback.cs | 330 |
1 files changed, 0 insertions, 330 deletions
diff --git a/ARMeilleure/Instructions/SoftFallback.cs b/ARMeilleure/Instructions/SoftFallback.cs index 829dd37a..d5e1ab65 100644 --- a/ARMeilleure/Instructions/SoftFallback.cs +++ b/ARMeilleure/Instructions/SoftFallback.cs @@ -5,287 +5,6 @@ namespace ARMeilleure.Instructions { static class SoftFallback { -#region "ShlReg" - public static long SignedShlReg(long value, long shift, bool round, int size) - { - int eSize = 8 << size; - - int shiftLsB = (sbyte)shift; - - if (shiftLsB < 0) - { - return SignedShrReg(value, -shiftLsB, round, eSize); - } - else if (shiftLsB > 0) - { - if (shiftLsB >= eSize) - { - return 0L; - } - - return value << shiftLsB; - } - else /* if (shiftLsB == 0) */ - { - return value; - } - } - - public static ulong UnsignedShlReg(ulong value, ulong shift, bool round, int size) - { - int eSize = 8 << size; - - int shiftLsB = (sbyte)shift; - - if (shiftLsB < 0) - { - return UnsignedShrReg(value, -shiftLsB, round, eSize); - } - else if (shiftLsB > 0) - { - if (shiftLsB >= eSize) - { - return 0UL; - } - - return value << shiftLsB; - } - else /* if (shiftLsB == 0) */ - { - return value; - } - } - - public static long SignedShlRegSatQ(long value, long shift, bool round, int size) - { - ExecutionContext context = NativeInterface.GetContext(); - - int eSize = 8 << size; - - int shiftLsB = (sbyte)shift; - - if (shiftLsB < 0) - { - return SignedShrReg(value, -shiftLsB, round, eSize); - } - else if (shiftLsB > 0) - { - if (shiftLsB >= eSize) - { - return SignedSignSatQ(value, eSize, context); - } - - if (eSize == 64) - { - long shl = value << shiftLsB; - long shr = shl >> shiftLsB; - - if (shr != value) - { - return SignedSignSatQ(value, eSize, context); - } - else /* if (shr == value) */ - { - return shl; - } - } - else /* if (eSize != 64) */ - { - return SignedSrcSignedDstSatQ(value << shiftLsB, size); // InstEmitSimdHelper.EmitSignedSrcSatQ(signedDst: true). - } - } - else /* if (shiftLsB == 0) */ - { - return value; - } - } - - public static ulong UnsignedShlRegSatQ(ulong value, ulong shift, bool round, int size) - { - ExecutionContext context = NativeInterface.GetContext(); - - int eSize = 8 << size; - - int shiftLsB = (sbyte)shift; - - if (shiftLsB < 0) - { - return UnsignedShrReg(value, -shiftLsB, round, eSize); - } - else if (shiftLsB > 0) - { - if (shiftLsB >= eSize) - { - return UnsignedSignSatQ(value, eSize, context); - } - - if (eSize == 64) - { - ulong shl = value << shiftLsB; - ulong shr = shl >> shiftLsB; - - if (shr != value) - { - return UnsignedSignSatQ(value, eSize, context); - } - else /* if (shr == value) */ - { - return shl; - } - } - else /* if (eSize != 64) */ - { - return UnsignedSrcUnsignedDstSatQ(value << shiftLsB, size); // InstEmitSimdHelper.EmitUnsignedSrcSatQ(signedDst: false). - } - } - else /* if (shiftLsB == 0) */ - { - return value; - } - } - - private static long SignedShrReg(long value, int shift, bool round, int eSize) // shift := [1, 128]; eSize := {8, 16, 32, 64}. - { - if (round) - { - if (shift >= eSize) - { - return 0L; - } - - long roundConst = 1L << (shift - 1); - - long add = value + roundConst; - - if (eSize == 64) - { - if ((~value & (value ^ add)) < 0L) - { - return (long)((ulong)add >> shift); - } - else - { - return add >> shift; - } - } - else /* if (eSize != 64) */ - { - return add >> shift; - } - } - else /* if (!round) */ - { - if (shift >= eSize) - { - if (value < 0L) - { - return -1L; - } - else /* if (value >= 0L) */ - { - return 0L; - } - } - - return value >> shift; - } - } - - private static ulong UnsignedShrReg(ulong value, int shift, bool round, int eSize) // shift := [1, 128]; eSize := {8, 16, 32, 64}. - { - if (round) - { - if (shift > 64) - { - return 0UL; - } - - ulong roundConst = 1UL << (shift - 1); - - ulong add = value + roundConst; - - if (eSize == 64) - { - if ((add < value) && (add < roundConst)) - { - if (shift == 64) - { - return 1UL; - } - - return (add >> shift) | (0x8000000000000000UL >> (shift - 1)); - } - else - { - if (shift == 64) - { - return 0UL; - } - - return add >> shift; - } - } - else /* if (eSize != 64) */ - { - if (shift == 64) - { - return 0UL; - } - - return add >> shift; - } - } - else /* if (!round) */ - { - if (shift >= eSize) - { - return 0UL; - } - - return value >> shift; - } - } - - private static long SignedSignSatQ(long op, int eSize, ExecutionContext context) // eSize := {8, 16, 32, 64}. - { - long tMaxValue = (1L << (eSize - 1)) - 1L; - long tMinValue = -(1L << (eSize - 1)); - - if (op > 0L) - { - context.Fpsr |= FPSR.Qc; - - return tMaxValue; - } - else if (op < 0L) - { - context.Fpsr |= FPSR.Qc; - - return tMinValue; - } - else - { - return 0L; - } - } - - private static ulong UnsignedSignSatQ(ulong op, int eSize, ExecutionContext context) // eSize := {8, 16, 32, 64}. - { - ulong tMaxValue = ulong.MaxValue >> (64 - eSize); - - if (op > 0UL) - { - context.Fpsr |= FPSR.Qc; - - return tMaxValue; - } - else - { - return 0UL; - } - } -#endregion - #region "ShrImm64" public static long SignedShrImm64(long value, long roundConst, int shift) { @@ -508,55 +227,6 @@ namespace ARMeilleure.Instructions } #endregion -#region "Saturating" - private static long SignedSrcSignedDstSatQ(long op, int size) - { - ExecutionContext context = NativeInterface.GetContext(); - - int eSize = 8 << size; - - long tMaxValue = (1L << (eSize - 1)) - 1L; - long tMinValue = -(1L << (eSize - 1)); - - if (op > tMaxValue) - { - context.Fpsr |= FPSR.Qc; - - return tMaxValue; - } - else if (op < tMinValue) - { - context.Fpsr |= FPSR.Qc; - - return tMinValue; - } - else - { - return op; - } - } - - private static ulong UnsignedSrcUnsignedDstSatQ(ulong op, int size) - { - ExecutionContext context = NativeInterface.GetContext(); - - int eSize = 8 << size; - - ulong tMaxValue = (1UL << eSize) - 1UL; - - if (op > tMaxValue) - { - context.Fpsr |= FPSR.Qc; - - return tMaxValue; - } - else - { - return op; - } - } -#endregion - #region "Count" public static ulong CountLeadingSigns(ulong value, int size) // size is 8, 16, 32 or 64 (SIMD&FP or Base Inst.). { |