diff options
Diffstat (limited to 'ARMeilleure/Instructions/InstEmitSimdShift32.cs')
| -rw-r--r-- | ARMeilleure/Instructions/InstEmitSimdShift32.cs | 168 |
1 files changed, 108 insertions, 60 deletions
diff --git a/ARMeilleure/Instructions/InstEmitSimdShift32.cs b/ARMeilleure/Instructions/InstEmitSimdShift32.cs index 6dcfe065..e0968b7b 100644 --- a/ARMeilleure/Instructions/InstEmitSimdShift32.cs +++ b/ARMeilleure/Instructions/InstEmitSimdShift32.cs @@ -33,64 +33,24 @@ namespace ARMeilleure.Instructions EmitShrImmSaturatingNarrowOp(context, op.U ? ShrImmSaturatingNarrowFlags.VectorZxZx : ShrImmSaturatingNarrowFlags.VectorSxSx); } - public static void Vrshr(ArmEmitterContext context) + public static void Vqshrun(ArmEmitterContext context) { - OpCode32SimdShImm op = (OpCode32SimdShImm)context.CurrOp; - int shift = GetImmShr(op); - long roundConst = 1L << (shift - 1); - - if (op.U) - { - if (op.Size < 2) - { - EmitVectorUnaryOpZx32(context, (op1) => - { - op1 = context.Add(op1, Const(op1.Type, roundConst)); - - return context.ShiftRightUI(op1, Const(shift)); - }); - } - else if (op.Size == 2) - { - EmitVectorUnaryOpZx32(context, (op1) => - { - op1 = context.ZeroExtend32(OperandType.I64, op1); - op1 = context.Add(op1, Const(op1.Type, roundConst)); + EmitShrImmSaturatingNarrowOp(context, ShrImmSaturatingNarrowFlags.VectorSxZx); + } - return context.ConvertI64ToI32(context.ShiftRightUI(op1, Const(shift))); - }); - } - else /* if (op.Size == 3) */ - { - EmitVectorUnaryOpZx32(context, (op1) => EmitShrImm64(context, op1, signed: false, roundConst, shift)); - } - } - else - { - if (op.Size < 2) - { - EmitVectorUnaryOpSx32(context, (op1) => - { - op1 = context.Add(op1, Const(op1.Type, roundConst)); + public static void Vrshr(ArmEmitterContext context) + { + EmitRoundShrImmOp(context, accumulate: false); + } - return context.ShiftRightSI(op1, Const(shift)); - }); - } - else if (op.Size == 2) - { - EmitVectorUnaryOpSx32(context, (op1) => - { - op1 = context.SignExtend32(OperandType.I64, op1); - op1 = context.Add(op1, Const(op1.Type, roundConst)); + public static void Vrshrn(ArmEmitterContext context) + { + EmitRoundShrImmNarrowOp(context, signed: false); + } - return context.ConvertI64ToI32(context.ShiftRightSI(op1, Const(shift))); - }); - } - else /* if (op.Size == 3) */ - { - EmitVectorUnaryOpZx32(context, (op1) => EmitShrImm64(context, op1, signed: true, roundConst, shift)); - } - } + public static void Vrsra(ArmEmitterContext context) + { + EmitRoundShrImmOp(context, accumulate: true); } public static void Vshl(ArmEmitterContext context) @@ -191,6 +151,89 @@ namespace ARMeilleure.Instructions } } + public static void EmitRoundShrImmOp(ArmEmitterContext context, bool accumulate) + { + OpCode32SimdShImm op = (OpCode32SimdShImm)context.CurrOp; + int shift = GetImmShr(op); + long roundConst = 1L << (shift - 1); + + if (op.U) + { + if (op.Size < 2) + { + EmitVectorUnaryOpZx32(context, (op1) => + { + op1 = context.Add(op1, Const(op1.Type, roundConst)); + + return context.ShiftRightUI(op1, Const(shift)); + }, accumulate); + } + else if (op.Size == 2) + { + EmitVectorUnaryOpZx32(context, (op1) => + { + op1 = context.ZeroExtend32(OperandType.I64, op1); + op1 = context.Add(op1, Const(op1.Type, roundConst)); + + return context.ConvertI64ToI32(context.ShiftRightUI(op1, Const(shift))); + }, accumulate); + } + else /* if (op.Size == 3) */ + { + EmitVectorUnaryOpZx32(context, (op1) => EmitShrImm64(context, op1, signed: false, roundConst, shift), accumulate); + } + } + else + { + if (op.Size < 2) + { + EmitVectorUnaryOpSx32(context, (op1) => + { + op1 = context.Add(op1, Const(op1.Type, roundConst)); + + return context.ShiftRightSI(op1, Const(shift)); + }, accumulate); + } + else if (op.Size == 2) + { + EmitVectorUnaryOpSx32(context, (op1) => + { + op1 = context.SignExtend32(OperandType.I64, op1); + op1 = context.Add(op1, Const(op1.Type, roundConst)); + + return context.ConvertI64ToI32(context.ShiftRightSI(op1, Const(shift))); + }, accumulate); + } + else /* if (op.Size == 3) */ + { + EmitVectorUnaryOpZx32(context, (op1) => EmitShrImm64(context, op1, signed: true, roundConst, shift), accumulate); + } + } + } + + private static void EmitRoundShrImmNarrowOp(ArmEmitterContext context, bool signed) + { + OpCode32SimdShImm op = (OpCode32SimdShImm)context.CurrOp; + + int shift = GetImmShr(op); + long roundConst = 1L << (shift - 1); + + EmitVectorUnaryNarrowOp32(context, (op1) => + { + if (op.Size <= 1) + { + op1 = context.Add(op1, Const(op1.Type, roundConst)); + op1 = signed ? context.ShiftRightSI(op1, Const(shift)) : context.ShiftRightUI(op1, Const(shift)); + } + else /* if (op.Size == 2 && round) */ + { + op1 = EmitShrImm64(context, op1, signed, roundConst, shift); // shift <= 32 + } + + return op1; + }, signed); + } + private static Operand EmitShlRegOp(ArmEmitterContext context, Operand op, Operand shiftLsB, int size, bool unsigned) { if (shiftLsB.Type == OperandType.I64) @@ -289,7 +332,7 @@ namespace ARMeilleure.Instructions op1 = EmitShrImm64(context, op1, signedSrc, roundConst, shift); // shift <= 32 } - return EmitSatQ(context, op1, 8 << op.Size, signedDst); + return EmitSatQ(context, op1, 8 << op.Size, signedSrc, signedDst); }, signedSrc); } @@ -313,15 +356,20 @@ namespace ARMeilleure.Instructions return context.Call(info, value, Const(roundConst), Const(shift)); } - private static Operand EmitSatQ(ArmEmitterContext context, Operand value, int eSize, bool signed) + private static Operand EmitSatQ(ArmEmitterContext context, Operand value, int eSize, bool signedSrc, bool signedDst) { Debug.Assert(eSize <= 32); - long intMin = signed ? -(1L << (eSize - 1)) : 0; - long intMax = signed ? (1L << (eSize - 1)) - 1 : (1L << eSize) - 1; + long intMin = signedDst ? -(1L << (eSize - 1)) : 0; + long intMax = signedDst ? (1L << (eSize - 1)) - 1 : (1L << eSize) - 1; + + Operand gt = signedSrc + ? context.ICompareGreater(value, Const(value.Type, intMax)) + : context.ICompareGreaterUI(value, Const(value.Type, intMax)); - Operand gt = context.ICompareGreater(value, Const(value.Type, intMax)); - Operand lt = context.ICompareLess(value, Const(value.Type, intMin)); + Operand lt = signedSrc + ? context.ICompareLess(value, Const(value.Type, intMin)) + : context.ICompareLessUI(value, Const(value.Type, intMin)); value = context.ConditionalSelect(gt, Const(value.Type, intMax), value); value = context.ConditionalSelect(lt, Const(value.Type, intMin), value); |