Macro definition in WDC tools with embedded asm …
Hi all … I have been working on various stuff lately. On of the thing I’m working on is speed optimisation. For doing that I decided to start to make inline assembler into my code. Take a sneak peek at what i’m doing :
#ifdef __C_MACROS__
#define v_20 #$20
#define v_80 #$80
#define VRAMByteWrite(value,vramdst) \
__VRAMByteWrite(value,vramdst,v_20,v_80)
#define __VRAMByteWrite(value,vramdst,v_20,v_80) asm { \
sep v_20; \
longa off; \
lda v_80; \
sta $2115; \
rep v_20; \
longa on; \
lda %%vramdst; \
sta $2116; \
sep v_20; \
longa off; \
lda %%value; \
sta $2118; \
rep v_20; \
longa on; \
}
#endif
This is an abstract of my new PPU.h include file. The usage of v_20 and v_80 is due to some limitation of the preprocessor comprared to what is possible with GCC by example. If you have an other syntax that work with WDC to include #$20 directly in the asm {} directive, shoot me a comment.
My 2k limit bug is still bugging me, the Eclipse howto might be finished this week since I’m almost done with the SNES_BaseProject. Something else is coming soon too.
++ Lint