diff options
Diffstat (limited to 'ARMeilleure/Instructions/InstEmitSimdHelper.cs')
| -rw-r--r-- | ARMeilleure/Instructions/InstEmitSimdHelper.cs | 55 |
1 files changed, 44 insertions, 11 deletions
diff --git a/ARMeilleure/Instructions/InstEmitSimdHelper.cs b/ARMeilleure/Instructions/InstEmitSimdHelper.cs index 49c17560..0e7af794 100644 --- a/ARMeilleure/Instructions/InstEmitSimdHelper.cs +++ b/ARMeilleure/Instructions/InstEmitSimdHelper.cs @@ -33,6 +33,14 @@ namespace ARMeilleure.Instructions }; public static readonly long ZeroMask = 128L << 56 | 128L << 48 | 128L << 40 | 128L << 32 | 128L << 24 | 128L << 16 | 128L << 8 | 128L << 0; + + public static ulong X86GetGf2p8LogicalShiftLeft(int shift) + { + ulong identity = (0b00000001UL << 56) | (0b00000010UL << 48) | (0b00000100UL << 40) | (0b00001000UL << 32) | + (0b00010000UL << 24) | (0b00100000UL << 16) | (0b01000000UL << 8) | (0b10000000UL << 0); + + return shift >= 0 ? identity >> (shift * 8) : identity << (-shift * 8); + } #endregion #region "X86 SSE Intrinsics" @@ -243,19 +251,44 @@ namespace ARMeilleure.Instructions throw new ArgumentException($"Invalid rounding mode \"{roundMode}\"."); } - public static ulong X86GetGf2p8LogicalShiftLeft(int shift) + public static Operand EmitSse41RoundToNearestWithTiesToAwayOpF(ArmEmitterContext context, Operand n, bool scalar) { - ulong identity = - (0b00000001UL << 56) | - (0b00000010UL << 48) | - (0b00000100UL << 40) | - (0b00001000UL << 32) | - (0b00010000UL << 24) | - (0b00100000UL << 16) | - (0b01000000UL << 8) | - (0b10000000UL << 0); + Debug.Assert(n.Type == OperandType.V128); - return shift >= 0 ? identity >> (shift * 8) : identity << (-shift * 8); + Operand nCopy = context.Copy(n); + + Operand rC = Const(X86GetRoundControl(FPRoundingMode.TowardsZero)); + + IOpCodeSimd op = (IOpCodeSimd)context.CurrOp; + + if ((op.Size & 1) == 0) + { + Operand signMask = scalar ? X86GetScalar(context, int.MinValue) : X86GetAllElements(context, int.MinValue); + signMask = context.AddIntrinsic(Intrinsic.X86Pand, signMask, nCopy); + + // 0x3EFFFFFF == BitConverter.SingleToInt32Bits(0.5f) - 1 + Operand valueMask = scalar ? X86GetScalar(context, 0x3EFFFFFF) : X86GetAllElements(context, 0x3EFFFFFF); + valueMask = context.AddIntrinsic(Intrinsic.X86Por, valueMask, signMask); + + nCopy = context.AddIntrinsic(scalar ? Intrinsic.X86Addss : Intrinsic.X86Addps, nCopy, valueMask); + + nCopy = context.AddIntrinsic(scalar ? Intrinsic.X86Roundss : Intrinsic.X86Roundps, nCopy, rC); + } + else + { + Operand signMask = scalar ? X86GetScalar(context, long.MinValue) : X86GetAllElements(context, long.MinValue); + signMask = context.AddIntrinsic(Intrinsic.X86Pand, signMask, nCopy); + + // 0x3FDFFFFFFFFFFFFFL == BitConverter.DoubleToInt64Bits(0.5d) - 1L + Operand valueMask = scalar ? X86GetScalar(context, 0x3FDFFFFFFFFFFFFFL) : X86GetAllElements(context, 0x3FDFFFFFFFFFFFFFL); + valueMask = context.AddIntrinsic(Intrinsic.X86Por, valueMask, signMask); + + nCopy = context.AddIntrinsic(scalar ? Intrinsic.X86Addsd : Intrinsic.X86Addpd, nCopy, valueMask); + + nCopy = context.AddIntrinsic(scalar ? Intrinsic.X86Roundsd : Intrinsic.X86Roundpd, nCopy, rC); + } + + return nCopy; } public static Operand EmitCountSetBits8(ArmEmitterContext context, Operand op) // "size" is 8 (SIMD&FP Inst.). |