ChocolArm64/Decoders/OpCode32AluImm.cs
gdkchan 0cda6b3cdf 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

21 lines
527 B
C#

using ChocolArm64.Instructions;
namespace ChocolArm64.Decoders
{
class OpCode32AluImm : OpCode32Alu
{
public int Imm { get; private set; }
public bool IsRotated { get; private set; }
public OpCode32AluImm(Inst inst, long position, int opCode) : base(inst, position, opCode)
{
int value = (opCode >> 0) & 0xff;
int shift = (opCode >> 8) & 0xf;
Imm = BitUtils.RotateRight(value, shift * 2, 32);
IsRotated = shift != 0;
}
}
}