Add Cls Instruction. (#67)
* Update AInstEmitAlu.cs * Update ASoftFallback.cs * Update AOpCodeTable.cs
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3 changed files with 32 additions and 5 deletions
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@ -41,6 +41,7 @@ namespace ChocolArm64
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Set("x1111010010xxxxxxxxx10xxxxxxxxxx", AInstEmit.Ccmp, typeof(AOpCodeCcmpImm));
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Set("x1111010010xxxxxxxxx00xxxxxxxxxx", AInstEmit.Ccmp, typeof(AOpCodeCcmpReg));
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Set("11010101000000110011xxxx01011111", AInstEmit.Clrex, typeof(AOpCodeSystem));
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Set("x101101011000000000101xxxxxxxxxx", AInstEmit.Cls, typeof(AOpCodeAlu));
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Set("x101101011000000000100xxxxxxxxxx", AInstEmit.Clz, typeof(AOpCodeAlu));
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Set("x0011010110xxxxx010000xxxxxxxxxx", AInstEmit.Crc32b, typeof(AOpCodeAluRs));
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Set("x0011010110xxxxx010001xxxxxxxxxx", AInstEmit.Crc32h, typeof(AOpCodeAluRs));
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@ -100,6 +100,24 @@ namespace ChocolArm64.Instruction
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EmitDataStore(Context, SetFlags);
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}
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public static void Cls(AILEmitterCtx Context)
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{
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AOpCodeAlu Op = (AOpCodeAlu)Context.CurrOp;
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Context.EmitLdintzr(Op.Rn);
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if (Op.RegisterSize == ARegisterSize.Int32)
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{
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ASoftFallback.EmitCall(Context, nameof(ASoftFallback.CountLeadingSigns32));
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}
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else
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{
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ASoftFallback.EmitCall(Context, nameof(ASoftFallback.CountLeadingSigns64));
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}
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Context.EmitStintzr(Op.Rd);
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}
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public static void Clz(AILEmitterCtx Context)
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{
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AOpCodeAlu Op = (AOpCodeAlu)Context.CurrOp;
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@ -20,6 +20,14 @@ namespace ChocolArm64.Instruction
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Context.EmitCall(typeof(ASoftFallback), MthdName);
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}
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public static uint CountLeadingSigns32(uint Value) => (uint)CountLeadingSigns(Value, 32);
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public static ulong CountLeadingSigns64(ulong Value) => (ulong)CountLeadingSigns(Value, 64);
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private static ulong CountLeadingSigns(ulong Value, int Size)
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{
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return CountLeadingZeros((Value >> 1) ^ Value, Size - 1);
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}
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public static uint CountLeadingZeros32(uint Value) => (uint)CountLeadingZeros(Value, 32);
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public static ulong CountLeadingZeros64(ulong Value) => (ulong)CountLeadingZeros(Value, 64);
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