public static IEnumerable <string> DeepParse(BinaryReader memory, N64Ptr address)
{
bool keepParsing = true;
MicrocodeParserTask task = new MicrocodeParserTask(address);
memory.BaseStream.Position = address & 0xFFFFFF;
while (keepParsing)
{
var microcode = new Microcode(memory);
yield return($"{memory.BaseStream.Position - 8:X6}: {PrintMicrocode(memory, microcode, false)}");
keepParsing = TraceNext(memory, task, microcode);
}
}
/// <summary>
/// Traces
/// </summary>
/// <param name="memory">Full RDRAM dump</param>
/// <param name="address">The entry point address for the display list trace</param>
/// <returns></returns>
public static IEnumerable <(N64Ptr ptr, Microcode gbi, MicrocodeParserTask task)> DeepTrace(BinaryReader memory, N64Ptr address)
{
bool keepParsing = true;
MicrocodeParserTask task = new MicrocodeParserTask(address);
memory.BaseStream.Position = address & 0xFFFFFF;
while (keepParsing)
{
var microcode = new Microcode(memory);
var addr = memory.BaseStream.Position - 8;
yield return(addr, microcode, task);
keepParsing = TraceNext(memory, task, microcode);
}
}
private static bool TraceNext(BinaryReader br, MicrocodeParserTask task, Microcode microcode)
{
switch (microcode.Name)
{
case G_.G_MOVEWORD:
if ((G_MW)((microcode.EncodingHigh >> 16) & 0xFF) == G_MW.G_MW_SEGMENT)
{
task.SegmentTable[(microcode.EncodingHigh & 0xFFFF) >> 2] = microcode.EncodingLow;
}
break;
case G_.G_BRANCH_Z:
{
N64Ptr addr;
var bank = (task.G_RDPHALF_1 >> 24) & 0xFF;
if (bank < 16)
{
addr = task.SegmentTable[bank] + (task.G_RDPHALF_1 & 0xFFFFFF);
}
else
{
addr = task.G_RDPHALF_1;
}
//already advanced the cursor so this should be good
task.DisplayListStack.Push(0x80000000 | br.BaseStream.Position);
//jump
br.BaseStream.Position = addr & 0xFFFFFF;
}
break;
case G_.G_DL:
{
// set address we're branching to
N64Ptr addr;
var bank = (microcode.EncodingLow >> 24) & 0xFF;
if (bank < 16)
{
addr = task.SegmentTable[bank] + (microcode.EncodingLow & 0xFFFFFF);
}
else
{
addr = microcode.EncodingLow;
}
//if branching
if (((microcode.EncodingHigh >> 16) & 0xFF) == 0)
{
//already advanced the cursor so this should be good
task.DisplayListStack.Push(0x80000000 | br.BaseStream.Position);
}
//jump
br.BaseStream.Position = addr & 0xFFFFFF;
}
break;
case G_.G_ENDDL:
if (task.DisplayListStack.Count == 0)
{
return(false);
}
else
{
N64Ptr jumpback = task.DisplayListStack.Pop();
br.BaseStream.Position = jumpback & 0xFFFFFF;
}
break;
case G_.G_RDPHALF_1: task.G_RDPHALF_1 = microcode.EncodingLow;
break;
case G_.G_RDPHALF_2: task.G_RDPHALF_2 = microcode.EncodingLow;
break;
}
return(true);
}
