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T32: Implement Data Processing (Modified Immediate) instructions (#3178)

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* T32: Implement Data Processing (Modified Immediate) instructions

* Update tests

* switch -> lookup table
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merry 2022-03-06 21:25:01 +00:00 • committed by GitHub
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commit 7af9fcbc06
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38
ARMeilleure/Decoders/OpCodeT32AluImm.cs Normal file
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@ -0,0 +1,38 @@
using ARMeilleure.Common;
using System.Runtime.Intrinsics;
namespace ARMeilleure.Decoders
{
class OpCodeT32AluImm : OpCodeT32Alu, IOpCode32AluImm
{
public int Immediate { get; }
public bool IsRotated { get; }
public new static OpCode Create(InstDescriptor inst, ulong address, int opCode) => new OpCodeT32AluImm(inst, address, opCode);
private static readonly Vector128<int> _factor = Vector128.Create(1, 0x00010001, 0x01000100, 0x01010101);
public OpCodeT32AluImm(InstDescriptor inst, ulong address, int opCode) : base(inst, address, opCode)
{
int imm8 = (opCode >> 0) & 0xff;
int imm3 = (opCode >> 12) & 7;
int imm1 = (opCode >> 26) & 1;
int imm12 = imm8 | (imm3 << 8) | (imm1 << 11);
if ((imm12 >> 10) == 0)
{
Immediate = imm8 * _factor.GetElement((imm12 >> 8) & 3);
IsRotated = false;
}
else
{
int shift = imm12 >> 7;
Immediate = BitUtils.RotateRight(0x80 | (imm12 & 0x7f), shift, 32);
IsRotated = shift != 0;
}
}
}
}

16
ARMeilleure/Decoders/OpCodeTable.cs
View file

@ -1048,25 +1048,41 @@ namespace ARMeilleure.Decoders
#region "OpCode Table (AArch32, T32)"
// Base
SetT32("11101011010xxxxx0xxxxxxxxxxxxxxx", InstName.Adc, InstEmit32.Adc, OpCodeT32AluRsImm.Create);
SetT32("11110x01010xxxxx0xxxxxxxxxxxxxxx", InstName.Adc, InstEmit32.Adc, OpCodeT32AluImm.Create);
SetT32("11101011000<xxxx0xxx<<<<xxxxxxxx", InstName.Add, InstEmit32.Add, OpCodeT32AluRsImm.Create);
SetT32("11110x01000<xxxx0xxx<<<<xxxxxxxx", InstName.Add, InstEmit32.Add, OpCodeT32AluImm.Create);
SetT32("11101010000<xxxx0xxx<<<<xxxxxxxx", InstName.And, InstEmit32.And, OpCodeT32AluRsImm.Create);
SetT32("11110x00000<xxxx0xxx<<<<xxxxxxxx", InstName.And, InstEmit32.And, OpCodeT32AluImm.Create);
SetT32("11110x<<<xxxxxxx10x0xxxxxxxxxxxx", InstName.B, InstEmit32.B, OpCodeT32BImm20.Create);
SetT32("11110xxxxxxxxxxx10x1xxxxxxxxxxxx", InstName.B, InstEmit32.B, OpCodeT32BImm24.Create);
SetT32("11101010001xxxxx0xxxxxxxxxxxxxxx", InstName.Bic, InstEmit32.Bic, OpCodeT32AluRsImm.Create);
SetT32("11110x00001xxxxx0xxxxxxxxxxxxxxx", InstName.Bic, InstEmit32.Bic, OpCodeT32AluImm.Create);
SetT32("11110xxxxxxxxxxx11x1xxxxxxxxxxxx", InstName.Bl, InstEmit32.Bl, OpCodeT32BImm24.Create);
SetT32("11110xxxxxxxxxxx11x0xxxxxxxxxxx0", InstName.Blx, InstEmit32.Blx, OpCodeT32BImm24.Create);
SetT32("111010110001xxxx0xxx1111xxxxxxxx", InstName.Cmn, InstEmit32.Cmn, OpCodeT32AluRsImm.Create);
SetT32("11110x010001xxxx0xxx1111xxxxxxxx", InstName.Cmn, InstEmit32.Cmn, OpCodeT32AluImm.Create);
SetT32("111010111011xxxx0xxx1111xxxxxxxx", InstName.Cmp, InstEmit32.Cmp, OpCodeT32AluRsImm.Create);
SetT32("11110x011011xxxx0xxx1111xxxxxxxx", InstName.Cmp, InstEmit32.Cmp, OpCodeT32AluImm.Create);
SetT32("11101010100<xxxx0xxx<<<<xxxxxxxx", InstName.Eor, InstEmit32.Eor, OpCodeT32AluRsImm.Create);
SetT32("11110x00100<xxxx0xxx<<<<xxxxxxxx", InstName.Eor, InstEmit32.Eor, OpCodeT32AluImm.Create);
SetT32("11101010010x11110xxxxxxxxxxxxxxx", InstName.Mov, InstEmit32.Mov, OpCodeT32AluRsImm.Create);
SetT32("11110x00010x11110xxxxxxxxxxxxxxx", InstName.Mov, InstEmit32.Mov, OpCodeT32AluImm.Create);
SetT32("11101010011x11110xxxxxxxxxxxxxxx", InstName.Mvn, InstEmit32.Mvn, OpCodeT32AluRsImm.Create);
SetT32("11110x00011x11110xxxxxxxxxxxxxxx", InstName.Mvn, InstEmit32.Mvn, OpCodeT32AluImm.Create);
SetT32("11101010011x<<<<0xxxxxxxxxxxxxxx", InstName.Orn, InstEmit32.Orn, OpCodeT32AluRsImm.Create);
SetT32("11110x00011x<<<<0xxxxxxxxxxxxxxx", InstName.Orn, InstEmit32.Orn, OpCodeT32AluImm.Create);
SetT32("11101010010x<<<<0xxxxxxxxxxxxxxx", InstName.Orr, InstEmit32.Orr, OpCodeT32AluRsImm.Create);
SetT32("11110x00010x<<<<0xxxxxxxxxxxxxxx", InstName.Orr, InstEmit32.Orr, OpCodeT32AluImm.Create);
SetT32("11101011110xxxxx0xxxxxxxxxxxxxxx", InstName.Rsb, InstEmit32.Rsb, OpCodeT32AluRsImm.Create);
SetT32("11110x01110xxxxx0xxxxxxxxxxxxxxx", InstName.Rsb, InstEmit32.Rsb, OpCodeT32AluImm.Create);
SetT32("11101011011xxxxx0xxxxxxxxxxxxxxx", InstName.Sbc, InstEmit32.Sbc, OpCodeT32AluRsImm.Create);
SetT32("11110x01011xxxxx0xxxxxxxxxxxxxxx", InstName.Sbc, InstEmit32.Sbc, OpCodeT32AluImm.Create);
SetT32("11101011101<xxxx0xxx<<<<xxxxxxxx", InstName.Sub, InstEmit32.Sub, OpCodeT32AluRsImm.Create);
SetT32("11110x01101<xxxx0xxx<<<<xxxxxxxx", InstName.Sub, InstEmit32.Sub, OpCodeT32AluImm.Create);
SetT32("111010101001xxxx0xxx1111xxxxxxxx", InstName.Teq, InstEmit32.Teq, OpCodeT32AluRsImm.Create);
SetT32("11110x001001xxxx0xxx1111xxxxxxxx", InstName.Teq, InstEmit32.Teq, OpCodeT32AluImm.Create);
SetT32("111010100001xxxx0xxx1111xxxxxxxx", InstName.Tst, InstEmit32.Tst, OpCodeT32AluRsImm.Create);
SetT32("11110x000001xxxx0xxx1111xxxxxxxx", InstName.Tst, InstEmit32.Tst, OpCodeT32AluImm.Create);
#endregion
FillFastLookupTable(InstA32FastLookup, AllInstA32, ToFastLookupIndexA);