We don't have anything called $amD, though we do have $acsD. However, these instructions affect flags based on the whole accumulator, so it's better to just use $acD.
For more information, ApplyWriteBackLog, WriteToBackLog, and ZeroWriteBackLog were added in b787f5f8f7 and the explanatory comment was added in fd40513fed, although it did not mention the specific instructions that could trigger this edge case. The statements about which registers can be written by main opcodes and extension opcodes are based on my own checking of all instructions in the manual.
It's been unused since DolphinWX was removed in 44b22c90df. Prior to that, it was used in Source/Core/DolphinWX/NetPlay/NetWindow.cpp. But the new equivalent in Source/Core/DolphinQt/NetPlay/NetPlayDialog.cpp uses NetPlayClient::GetPlayers instead. Stringifying (or creating a table, as is done now) should be done by the UI in any case.
Among other things, this trims trailing newline characters. Before (on windows) the \r would corrupt the output and make them very hard to understand (as the error message would be drawn over the code line, but part of the code line would peek out from behind it).
Without this, execution continues beyond the end of the function, into the great unknown (probably eventually falling into either code left from a previous test, or the start of the DSP ROM). end_of_test is just an infinite loop to stop executing until the DSP is reset.
Ninja puts way more effort into compiling targets in parallel, and
ignores dependenceis until link time.
So we need to jump though hoops to force ninja to compile
pch.cpp before any targets which depend on the PCH.
I have no idea why cmake supports PUBLIC on target_sources,
but it does. It causes all targets that depend on this target
to try and include the files in their sources.
Except it doesn't take paths into account, so it breaks. Mabye
it would work if you used an abolute source? But I'm not sure
there is a sane usecase.
