In some very unscientific benchmark:
spu_thread::do_dma_transfer() was taking 2.27% of my CPU before, now
0.07%, while __memmove_avx_unaligned_erms() was taking 1.47% and now
2.88%, which added makes about 0.8% saved.
I saw stvx v128{0} (aligned 16-bytes store) usage on the first 16-bytes of CellSaveDataCBResult before funcStat in fw.
Also I saw 4 stw of u32{0} on it as well before funcFile, funcFixed and funcList.
So just add the resets for result before all callbacks, and make all
members of savedata_ontext 16 -byte aligned in case there are more
members guaranteed to be aligned.
* Always memset 0 setBuf->buf (to bufSize) before funcStat if the direcory is not new.
* Always memset 0 setBuf->buf (to bufSize) if listGet->dirNum became non-zero (listGet->dirListNum can be zero yet memset still occurs) .
* Clear traces of setList setup before funcStat (after funcFixed/List, only if listGet->dirNum != 0, callback can hack this value and prevent the memset).
- Use native FMA to emulate VMADDFP, with a fallback for processors that don't support FMA
- Use native FMA to emulate VNMSUBFP as well, but note that it differs from the emulated path with regards to negative zero
'id' is not the idm id, also explicitly join the thread so a situation where the thread is still active and communicating other threads (e.g via MMIO or MFC) yet its ID is removed won't happen. (logic breakage, destroyed thread can't be active)
* Make PPU id removal after exit atomic with descheduling
* Make joining thread scheduling atomic with thread exit sleep.
* Update sys_ppu_thread_stop/restart.
* Add idm::remove_verify.
* Check listSet->fixedListNum.
* Check listSet->fixedList for nullptr and its directory items names.
* Check listSet->focusDirName for nullptr and directory name.
* Check listSet->newData->iconPosition.
* Check listSet->newData->dirName for nullptr and directory string.
* Check statSet->setParam->parental_level for old sdk.
* Return an error if listSet->focusPosition is NEWDATA and listSet->newData is nullptr.
* Simplify savedata directory list selection.
* Allow '_' at filenames start and extension.
* Check if reading offset is valid, fix error code to CELL_SAVEDATA_ERROR_FAILURE.
* Don't create empty file on error of write ops.
* Don't allow "." and ".." filenames on funcFile, return CELL_SAVEDATA_ERROR_BROKEN.
Use -fno-exceptions in cmake.
On MSVC, enable _HAS_EXCEPTION=0.
Cleanup throw/catch from the source.
Create yaml.cpp enclave because it needs exception to work.
Disable thread_local optimizations in logs.cpp (TODO).
Implement cpu_counter for cpu_threads (moved globals).
