b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync/* $Xorg: fastblt.h,v 1.4 2001/02/09 02:05:17 xorgcvs Exp $ */
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b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync/* $XFree86: xc/programs/Xserver/mfb/fastblt.h,v 1.4 2001/01/17 22:37:01 dawes Exp $ */
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * Fast bitblt macros for certain hardware. If your machine has an addressing
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * mode of small constant + register, you'll probably want this magic specific
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * code. It's 25% faster for the R2000. I haven't studied the Sparc
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * instruction set, but I suspect it also has this addressing mode. Also,
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * unrolling the loop by 32 is possibly excessive for mfb. The number of times
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * the loop is actually looped through is pretty small.
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * WARNING: These macros make *a lot* of assumptions about
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * the environment they are invoked in. Plenty of implicit
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * arguments, lots of side effects. Don't use them casually.
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync/* to allow mfb and cfb to share code... */
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync SwitchOdd( 7) SwitchEven( 6) SwitchOdd( 5) SwitchEven( 4) \