diff options
Diffstat (limited to 'macros/data.asm')
| -rw-r--r-- | macros/data.asm | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/macros/data.asm b/macros/data.asm index 1f3c87a0..58e8f740 100644 --- a/macros/data.asm +++ b/macros/data.asm @@ -69,3 +69,12 @@ REPT _NARG SHIFT ENDR ENDM + +sine_table: MACRO +; \1 samples of sin(x) from x=0 to x<32768 (pi radians) +x = 0 +REPT \1 + dw (sin(x) + (sin(x) & $ff)) >> 8 ; round up +x += DIV(32768, \1) ; a circle has 65536 "degrees" +ENDR +ENDM |