private static void OptimizeParse_cmdB7(ROM rom, DisplayListRegion region, RegionOptimizeState state)
{
// Very failsafe approach
state.lastB6Cmd = 0;
Int64 cmd = rom.Read64();
// Basically NOP
if ((UInt64)cmd == 0xB700000000000000)
{
rom.Write64(0);
return;
}
// initial state
if (state.lastB7Cmd == 0)
{
state.lastB7Cmd = cmd;
return;
}
// if current cmd loads the same, remove current cmd
if (cmd == state.lastB7Cmd)
{
rom.Write64(0);
return;
}
}
private static void OptimizeParse_cmd04(ROM rom, DisplayListRegion region, RegionOptimizeState state)
{
// initial state
if (state.last04Cmd == 0)
{
state.last04Cmd = rom.Read64();
return;
}
Int64 cmd = rom.Read64();
// if current 04 loads the same vertices, remove current cmd
if (cmd == state.last04Cmd)
{
rom.Write64(0);
return;
}
// new vertices are being loaded, update the thing
state.last04Cmd = cmd;
// if previous cmd is 0x04, it will be overriden by current 04 anyways
if (rom.Read8(-8) == 0x04)
{
rom.Write64(0, -8);
}
}
public static void PerformRegionOptimize(ROM realRom, Region region, FixConfig config)
{
// This is fake rom but it works anyways, just more convenient
// Want to be safe with overwriting the whole display list
ROM fakeRom = new ROM(region.data);
RegionOptimizeState state = new RegionOptimizeState(config);
DisplayListRegion dlRegion = (DisplayListRegion)region;
byte curCmdIndex;
do
{
curCmdIndex = fakeRom.Read8();
OptimizeParserCmd func = optimizeParser[curCmdIndex];
func(fakeRom, dlRegion, state);
fakeRom.AddOffset(8);
}while (fakeRom.offset < region.length);
// Now write data to real rom + trimming
// bzero
fakeRom.offset = 0;
realRom.PushOffset(region.romStart);
{
do
{
realRom.Write64(0x0101010101010101);
realRom.AddOffset(8);
fakeRom.AddOffset(8);
} while (fakeRom.offset < region.length);
}
realRom.PopOffset();
fakeRom.offset = 0;
realRom.PushOffset(region.romStart);
{
int start = region.romStart;
do
{
Int64 cmd = fakeRom.Read64();
fakeRom.AddOffset(8);
if (config.trimNOPs && cmd == 0 && dlRegion.isUnusedTrimmingAllowed)
{
continue;
}
realRom.Write64((ulong)cmd);
realRom.AddOffset(8);
} while (fakeRom.offset < region.length);
region.length = realRom.offset - start;
region.data = new byte[region.length];
realRom.ReadData(region.romStart, region.length, region.data);
}
realRom.PopOffset();
}
private static void OptimizeParse_cmdFD(ROM rom, DisplayListRegion region, RegionOptimizeState state)
{
if (state.prevFDcmdAddr != 0)
{
rom.PushOffset(state.prevFDcmdAddr);
rom.Write64(0);
rom.PopOffset();
}
state.prevFDcmdAddr = rom.offset;
}
private static void OptimizeParse_cmdFB(ROM rom, DisplayListRegion region, RegionOptimizeState state)
{
/*
* Int64 cmd = rom.Read64();
* if (state.lastFBCmd == 0)
* {
* state.lastFBCmd = cmd;
* return;
* }
*
* if (cmd == state.lastFBCmd)
* {
* rom.Write64(0);
* return;
* }
*/
}
private static void OptimizeParse_cmdBC(ROM rom, DisplayListRegion region, RegionOptimizeState state)
{
Int64 cmd = rom.Read64();
// initial state
if (state.lastBCCmd == 0)
{
state.lastBCCmd = cmd;
return;
}
// if current cmd loads the same, remove current cmd
if (cmd == state.lastBCCmd)
{
rom.Write64(0);
return;
}
}
private static void OptimizeParse_common(ROM rom, DisplayListRegion region, RegionOptimizeState state)
{
}
private static void OptimizeParse_cmdBF(ROM rom, DisplayListRegion region, RegionOptimizeState state)
{
state.prevF2cmdAddr = 0;
state.prevFDcmdAddr = 0;
}
