98e05ee4b7
* 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
58 lines
1.7 KiB
C#
58 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();
|
|
}
|
|
}
|
|
}
|
|
}
|