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Ryujinx/ChocolArm64/Decoders/OpCode32Alu.cs
gdkchan c1bdf19061
Implement some ARM32 memory instructions and CMP (#565)
* Implement ARM32 memory instructions: LDM, LDR, LDRB, LDRD, LDRH, LDRSB, LDRSH, STM, STR, STRB, STRD, STRH (immediate and register + immediate variants), implement CMP (immediate and register shifted by immediate variants)

* Rename some opcode classes and flag masks for consistency

* Fix a few suboptimal ARM32 codegen issues, only loads should be considered on decoder when checking if Rt == PC, and only NZCV flags should be considered for comparison optimizations

* Take into account Rt2 for LDRD instructions aswell when checking if the instruction changes PC

* Re-align arm32 instructions on the opcode table
2019-01-29 13:06:11 -03:00

20 lines
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512 B
C#

using ChocolArm64.Instructions;
namespace ChocolArm64.Decoders
{
class OpCode32Alu : OpCode32, IOpCode32Alu
{
public int Rd { get; private set; }
public int Rn { get; private set; }
public bool SetFlags { get; private set; }
public OpCode32Alu(Inst inst, long position, int opCode) : base(inst, position, opCode)
{
Rd = (opCode >> 12) & 0xf;
Rn = (opCode >> 16) & 0xf;
SetFlags = ((opCode >> 20) & 1) != 0;
}
}
}