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Diffstat (limited to 'engine/routines/getsquareroot.asm')
| -rw-r--r-- | engine/routines/getsquareroot.asm | 32 |
1 files changed, 0 insertions, 32 deletions
diff --git a/engine/routines/getsquareroot.asm b/engine/routines/getsquareroot.asm deleted file mode 100644 index 412fd04ff..000000000 --- a/engine/routines/getsquareroot.asm +++ /dev/null @@ -1,32 +0,0 @@ -NUM_SQUARE_ROOTS EQU 255 - -GetSquareRoot: ; 13b87 -; Return the square root of de in b. - -; Rather than calculating the result, we take the index of the -; first value in a table of squares that isn't lower than de. - - ld hl, .Squares - ld b, 0 -.loop -; Make sure we don't go past the end of the table. - inc b - ld a, b - cp NUM_SQUARE_ROOTS - ret z - -; Iterate over the table until b**2 >= de. - ld a, [hli] - sub e - ld a, [hli] - sbc d - - jr c, .loop - ret - -.Squares: ; 13b98 -x = 1 -rept NUM_SQUARE_ROOTS - dw x * x -x = x + 1 -endr |