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recompiled SBL6 libs
vbt - Mar 21, 2004
  vbt Mar 21, 2004
Here is a small archive... containing the recompiled libraries with the latest GNUSH (4.01) I didn't notice changes with the 3.03 release. You can use those libs for tests,I used them for now only on emus (soon on mySaturn ).

My only "problem" is that above all recompiled libs are bigger than original libs. I used these comands to compile/assemble :

gasm xxxx.s -small -o xxxx.o (I have no idea if there are better options)

gcc -m2 -O3 -fomit-frame-pointer -D_SH -DMODEL_S -Wall ....

 ExCyber Mar 21, 2004

  
	
	

		
		

			My only "problem" is that above all recompiled libs are bigger than original libs. I used these comands to compile/assemble :



gasm xxxx.s -small -o xxxx.o (I have no idea if there are better options)



gcc -m2 -O3 -fomit-frame-pointer -D_SH -DMODEL_S -Wall ....


-O3 probably does more harm than good on Saturn. Personally I'd go with -O1 or even -Os

 Alexvrb Mar 21, 2004

  
	
	

		
		

			Originally posted by ExCyber@Mar 22, 2004 @ 04:36 AM



 




  
	
	

		
		

			My only "problem" is that above all recompiled libs are bigger than original libs. I used these comands to compile/assemble :



gasm xxxx.s -small -o xxxx.o (I have no idea if there are better options)



gcc -m2 -O3 -fomit-frame-pointer -D_SH -DMODEL_S -Wall ....
		

		

	





-O3 probably does more harm than good on Saturn. Personally I'd go with -O1 or even -Os


Can't you use -Os with -O1 (or 2/3)? -Os would probably help though.

 vbt Mar 22, 2004

  
	
	

		
		

			Originally posted by ExCyber@Mar 22, 2004 @ 06:36 AM



 -O3 probably does more harm than good on Saturn. Personally I'd go with -O1 or even -Os


I didn't know -Os option

 Alexvrb Mar 22, 2004
I know Ian Michael has had good luck using it on the Dreamcast (though in that case it was along with -O3). Helps a lot with a small cache. I guess the only way to see what is the best is to test different combinations out, see what you can squeeze out of GCC.

 ExCyber Mar 23, 2004

  
	
	

		
		

			Can't you use -Os with -O1 (or 2/3)?


*digs up GCC manual*

Nope. It is valid syntax to specify them together, but only the last one specified actually has any effect. -Os is basically -O2 without alignment and prefetch optimizations.

 Alexvrb Mar 23, 2004
Ack, if that is the case, then Ian might have specified his own custom optimizations.

 vbt Apr 3, 2004

  
	
	

		
		

			Originally posted by ExCyber@Mar 23, 2004 @ 08:47 PM



 Nope. It is valid syntax to specify them together, but only the last one specified actually has any effect. -Os is basically -O2 without alignment and prefetch optimizations.


I have compiled the libs with the -Os option but I don't have any idea on how the perf will be decreased or not comparing to the -O2 option.

The new vcompiled version is here...