private FlagType GetFlag(int pc)
{
snesData.Data.RomBytes[pc].Lock.EnterReadLock();
try
{
return(snesData.GetFlag(pc));
}
finally
{
snesData.Data.RomBytes[pc].Lock.ExitReadLock();
}
}
// return true if we modified this address
private bool ProcessUsageMapAddress(int snesOffset)
{
var pc = snesData.ConvertSnesToPc(snesOffset);
// branch predictor may optimize this
if (pc == -1 || pc >= snesData.GetRomSize())
{
return(false);
}
var flags = (BsnesPlusUsage)usageMap[snesOffset];
// no information available
if (flags == 0)
{
return(false);
}
// skip if there is something already set..
if (snesData.GetFlag(pc) != FlagType.Unreached)
{
return(false);
}
// opcode: 0x30, operand: 0x20
if (flags.HasFlag(BsnesPlusUsage.UsageExec))
{
snesData.SetFlag(pc, FlagType.Operand);
if (flags.HasFlag(BsnesPlusUsage.UsageOpcode))
{
prevFlags = ((int)flags & 3) << 4;
snesData.SetFlag(pc, FlagType.Opcode);
}
snesData.SetMxFlags(pc, prevFlags);
return(true);
}
if (!flags.HasFlag(BsnesPlusUsage.UsageRead))
{
return(false);
}
snesData.SetFlag(pc, FlagType.Data8Bit);
return(true);
}
