Ryujinx/ARMeilleure/Decoders/OpCodeT16MemImm5.cs
merry 98e05ee4b7
ARMeilleure: Thumb support (All T16 instructions) (#3105)
* Decoders: Add InITBlock argument

* OpCodeTable: Minor cleanup

* OpCodeTable: Remove existing thumb instruction implementations

* OpCodeTable: Prepare for thumb instructions

* OpCodeTables: Improve thumb fast lookup

* Tests: Prepare for thumb tests

* T16: Implement BX

* T16: Implement LSL/LSR/ASR (imm)

* T16: Implement ADDS, SUBS (reg)

* T16: Implement ADDS, SUBS (3-bit immediate)

* T16: Implement MOVS, CMP, ADDS, SUBS (8-bit immediate)

* T16: Implement ANDS, EORS, LSLS, LSRS, ASRS, ADCS, SBCS, RORS, TST, NEGS, CMP, CMN, ORRS, MULS, BICS, MVNS (low registers)

* T16: Implement ADD, CMP, MOV (high reg)

* T16: Implement BLX (reg)

* T16: Implement LDR (literal)

* T16: Implement {LDR,STR}{,H,B,SB,SH} (register)

* T16: Implement {LDR,STR}{,B,H} (immediate)

* T16: Implement LDR/STR (SP)

* T16: Implement ADR

* T16: Implement Add to SP (immediate)

* T16: Implement ADD/SUB (SP)

* T16: Implement SXTH, SXTB, UXTH, UTXB

* T16: Implement CBZ, CBNZ

* T16: Implement PUSH, POP

* T16: Implement REV, REV16, REVSH

* T16: Implement NOP

* T16: Implement LDM, STM

* T16: Implement SVC

* T16: Implement B (conditional)

* T16: Implement B (unconditional)

* T16: Implement IT

* fixup! T16: Implement ADD/SUB (SP)

* fixup! T16: Implement Add to SP (immediate)

* fixup! T16: Implement IT

* CpuTestThumb: Add randomized tests

* Remove inITBlock argument

* Address nits

* Use index to handle IfThenBlockState

* Reduce line noise

* fixup

* nit
2022-02-17 19:39:45 -03:00

59 lines
1.7 KiB
C#

using ARMeilleure.Instructions;
using System;
namespace ARMeilleure.Decoders
{
class OpCodeT16MemImm5 : OpCodeT16, IOpCode32Mem
{
public int Rt { get; }
public int Rn { get; }
public bool WBack => false;
public bool IsLoad { get; }
public bool Index => true;
public bool Add => true;
public int Immediate { get; }
public new static OpCode Create(InstDescriptor inst, ulong address, int opCode) => new OpCodeT16MemImm5(inst, address, opCode);
public OpCodeT16MemImm5(InstDescriptor inst, ulong address, int opCode) : base(inst, address, opCode)
{
Rt = (opCode >> 0) & 7;
Rn = (opCode >> 3) & 7;
switch (inst.Name)
{
case InstName.Ldr:
case InstName.Ldrb:
case InstName.Ldrh:
IsLoad = true;
break;
case InstName.Str:
case InstName.Strb:
case InstName.Strh:
IsLoad = false;
break;
}
switch (inst.Name)
{
case InstName.Str:
case InstName.Ldr:
Immediate = ((opCode >> 6) & 0x1f) << 2;
break;
case InstName.Strb:
case InstName.Ldrb:
Immediate = ((opCode >> 6) & 0x1f);
break;
case InstName.Strh:
case InstName.Ldrh:
Immediate = ((opCode >> 6) & 0x1f) << 1;
break;
default:
throw new InvalidOperationException();
}
}
}
}