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 fb8ea844..b5836b50 100644 --- a/macros/data.asm +++ b/macros/data.asm @@ -68,3 +68,12 @@ dbbw: MACRO db \1, \2 dw \3 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 = x + DIV(32768, \1) ; a circle has 65536 "degrees" +ENDR +ENDM |