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Performance fix for Primal and Ghosthunter. (#3376) 

Fix for terrible performance in US versions of Primal (all the time) and Ghosthunter (when encountering Teddy Bear and in the moment of Gator-Man's rush attack, maybe few other cases), Both games use shared code with pretty dumb wait loops in the microcode, those are absolutelly unnecessary and significantly kill performance on emulator.

* Performance fix for Primal and Ghosthunter

Fix for terrible performance in US versions of Primal (all the time) and Ghosthunter (when encountering Teddy Bear and in the moment of Gator-Man's rush attack, maybe few other cases). Both games use shared code with pretty dumb wait loops in the microcode, those are absolutely unnecessary and significantly kill performance on the emulator.
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Raziel Znot 2020-05-16 02:06:49 +03:00 committed by GitHub
parent b00792d6ce
commit a14e3c25b0
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@ -4682,6 +4682,32 @@ Serial = SCUS-97142
Name = Primal - Civilization Is Only Skin Deep
Region = NTSC-U
Compat = 5
[patches = FCD89DC3]
author=Raziel I.C.H.I. Znot
comment=Performance fix
//PCSX2 attempts to run VU0 for thousands of cycles as soon as it is started,
//so the game will wait endlessly in a wait loop until COP2 gets around to
//setting vi5(to break the loop) and vf9(to finish calculation) which is many thousands of cycles later.
//VU0 side, remove wait loop
patch=1,EE,0040F110,word,8000033c
patch=1,EE,0040F128,word,8000033c
patch=1,EE,0040F168,word,8000033c
patch=1,EE,0040F180,word,8000033c
//duplicate, not sure that it's used, but patched anyway
patch=1,EE,0040F720,word,8000033c
patch=1,EE,0040F738,word,8000033c
patch=1,EE,0040F778,word,8000033c
patch=1,EE,0040F790,word,8000033c
//EE side, rearrange and clean code so VU0 receives all data at once
patch=1,EE,00399B14,word,00000000
patch=1,EE,00399B58,word,48A44800
patch=1,EE,00399B5C,word,4A00D839
patch=1,EE,00399B60,word,00000000
patch=1,EE,00399BA4,word,00000000
patch=1,EE,00399C10,word,48A44800
patch=1,EE,00399C14,word,4A00D839
patch=1,EE,00399C18,word,00000000
[/patches]
---------------------------------------------
Serial = SCUS-97144
Name = PlayStation Underground 5.1
@ -39708,6 +39734,32 @@ Serial = SLUS-20993
Name = Ghosthunter
Region = NTSC-U
Compat = 5
[patches = 29C7DA54]
author=Raziel I.C.H.I. Znot
comment=Performance fix
//PCSX2 attempts to run VU0 for thousands of cycles as soon as it is started,
//so the game will wait endlessly in a wait loop until COP2 gets around to
//setting vi5(to break the loop) and vf9(to finish calculation) which is many thousands of cycles later.
//VU0 side, remove wait loop
patch=1,EE,00461C68,word,8000033c
patch=1,EE,00461C80,word,8000033c
patch=1,EE,00461CC0,word,8000033c
patch=1,EE,00461CD8,word,8000033c
//duplicate, not sure that it's used, but patched anyway
patch=1,EE,00463118,word,8000033c
patch=1,EE,00463130,word,8000033c
patch=1,EE,00463170,word,8000033c
patch=1,EE,00463188,word,8000033c
//EE side, rearrange and clean code so VU0 receives all data at once
patch=1,EE,003F8544,word,00000000
patch=1,EE,003F8588,word,48A44800
patch=1,EE,003F858C,word,4A00D839
patch=1,EE,003F8590,word,00000000
patch=1,EE,003F85D4,word,00000000
patch=1,EE,003F8640,word,48A44800
patch=1,EE,003F8644,word,4A00D839
patch=1,EE,003F8648,word,00000000
[/patches]
---------------------------------------------
Serial = SLUS-20994
Name = Full Metal Alchemist and The Broken Angel