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Brooke Vibber 2024-12-31 08:56:59 -08:00
parent 13257309dc
commit 2fcb30b76a
1 changed files with 10 additions and 10 deletions
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mandel.s
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@ -980,7 +980,7 @@ keep_going:
all_done:
.endmacro
; 8.24: (-128 .. 127.9) / (-8 .. +7.9)
; 8.24: (-128 .. 127.9)
; zx = zx_2 - zy_2 + cx
sub32 zx, zx_2, zy_2
add32 zx, zx, cx
@ -991,7 +991,7 @@ keep_going:
add32 zy, zy, cy
quick_exit zy, 2
; convert 8.24 -> 4.12
; convert 8.24 -> 4.12: (-8 .. +7.9)
shift_round_16 zx, 4
shift_round_16 zy, 4
@ -1042,10 +1042,10 @@ z_buffer_loop:
; Compare the previously stored z values
ldy #0
z_compare zx
z_compare zx + 1
z_compare zy
z_compare zy + 1
z_compare zx + 2
z_compare zx + 3
z_compare zy + 2
z_compare zy + 3
cpy #4
bne z_no_matches
@ -1060,10 +1060,10 @@ z_no_matches:
z_nothing_to_read:
; Store and expand
z_store zx
z_store zx + 1
z_store zy
z_store zy + 1
z_store zx + 2
z_store zx + 3
z_store zy + 2
z_store zy + 3
z_advance
stx z_buffer_end