SNES: Reduced binary size by ~20KB

I refactored spc700.c: - Replaced jump table by a switch. I'm aware that they're essentially the same thing (given our range), but the generated code is ~9KB less, so... - Removed unnecessary inlining Doesn't seem to have any performance impact, if anything it is marginally faster... Possible improvements: - Grouping identical instructions will reduce size further, but it might break the switch optimizations - Finalizing the loop inside the function will certainly improve performance
ducalex · Feb 22, 2025 · 66c194a · 66c194a
1 parent 5fe002e
commit 66c194a
Show file tree

Hide file tree

Showing 3 changed files with 1,474 additions and 2,459 deletions.
diff --git a/retro-core/components/snes9x/src/apu.h b/retro-core/components/snes9x/src/apu.h
@@ -82,7 +82,6 @@ bool S9xInitSound(int32_t buffer_ms, int32_t lag_ms);
 void S9xPrintAPUState(void);
 extern uint8_t S9xAPUCycles [256];       /* Scaled cycle lengths */
 extern const uint8_t S9xAPUCycleLengths [256]; /* Raw data. */
-extern void (* const S9xApuOpcodes [256])(void);
 
 #define APU_VOL_LEFT  0x00
 #define APU_VOL_RIGHT 0x01