// m - memory access: base + offset with 3-bit register encoding
private static bool mb(uint uInstr, MicroMipsDisassembler dasm)
{
var encodedBase = baseField16.Read(uInstr);
var iBase = threeBitRegisterEncodings[encodedBase];
var baseReg = dasm.arch.GetRegister(iBase);
var encOffset = offsetField16.Read(uInstr);
var offset = encodedByteOffsets[encOffset];
var mop = new IndirectOperand(PrimitiveType.Byte, offset, baseReg);
dasm.ops.Add(mop);
return(true);
}
// M - memory access: base + offset with 5-bit register encodings
private static Mutator <MicroMipsDisassembler> M(PrimitiveType dt)
{
return((u, d) =>
{
var iBase = (int)baseField.Read(u);
var baseReg = d.arch.GetRegister(iBase);
var offset = offsetField.ReadSigned(u);
var mop = new IndirectOperand(dt, offset, baseReg);
d.ops.Add(mop);
return true;
});
}
private static Mutator <MicroMipsDisassembler> m(PrimitiveType dt)
{
var baseField = new Bitfield(4, 3);
var offsetField = new Bitfield(0, 4);
return((u, d) =>
{
var iBase = baseField.Read(u);
var iBase32 = threeBitRegisterEncodings[iBase];
var baseReg = d.arch.GetRegister(iBase32);
var offset = offsetField.ReadSigned(u) * dt.Size;
var mop = new IndirectOperand(dt, offset, baseReg);
d.ops.Add(mop);
return true;
});
}