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namespace Ryujinx.HLE.HOS.Tamper.CodeEmitters
{
/// <summary>
/// Code type 0xC2 performs saving or restoring of multiple registers using a bitmask.
/// NOTE: Registers are saved and restored to a different set of registers than the ones used
/// for the other opcodes (Save Registers).
/// </summary>
class SaveOrRestoreRegisterWithMask
{
private const int OperationTypeIndex = 2;
private const int RegisterMaskIndex = 4;
private const int RegisterMaskSize = 4;
public static void Emit(byte[] instruction, CompilationContext context)
{
// C2x0XXXX
// x: Operand Type, see below.
// X: 16-bit bitmask, bit i == save or restore register i.
byte operationType = instruction[OperationTypeIndex];
ulong mask = InstructionHelper.GetImmediate(instruction, RegisterMaskIndex, RegisterMaskSize);
for (byte regIndex = 0; mask != 0; mask >>= 1, regIndex++)
{
if ((mask & 0x1) != 0)
{
SaveOrRestoreRegister.Impl(operationType, regIndex, regIndex, context);
}
}
}
}
}
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