You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
27 lines
245 B
ArmAsm
27 lines
245 B
ArmAsm
12 years ago
|
;
|
||
|
; Ullrich von Bassewitz, 06.08.1998
|
||
|
;
|
||
|
; CC65 runtime: long complement
|
||
|
;
|
||
|
|
||
|
.export compleax
|
||
|
.importzp sreg
|
||
|
|
||
|
; eax = ~eax
|
||
|
|
||
|
compleax:
|
||
|
eor #$FF
|
||
|
pha
|
||
|
txa
|
||
|
eor #$FF
|
||
|
tax
|
||
|
lda sreg
|
||
|
eor #$FF
|
||
|
sta sreg
|
||
|
lda sreg+1
|
||
|
eor #$FF
|
||
|
sta sreg+1
|
||
|
pla
|
||
|
rts
|
||
|
|