mirror of
https://github.com/cc65/cc65.git
synced 2024-11-03 10:07:02 +00:00
32 lines
282 B
ArmAsm
32 lines
282 B
ArmAsm
|
;
|
||
|
|
; Ullrich von Bassewitz, 06.08.1998
|
||
|
|
;
|
||
|
|
; CC65 runtime: negation on longs
|
||
|
|
;
|
||
|
|
|
||
|
|
;
|
||
|
|
; eax = -eax
|
||
|
|
;
|
||
|
|
.export negeax
|
||
|
|
.importzp sreg
|
||
|
|
|
||
|
|
negeax: clc
|
||
|
|
eor #$FF
|
||
|
|
adc #1
|
||
|
|
pha
|
||
|
|
txa
|
||
|
|
eor #$FF
|
||
|
|
adc #0
|
||
|
|
tax
|
||
|
|
lda sreg
|
||
|
|
eor #$FF
|
||
|
|
adc #0
|
||
|
|
sta sreg
|
||
|
|
lda sreg+1
|
||
|
|
eor #$FF
|
||
|
|
adc #0
|
||
|
|
sta sreg+1
|
||
|
|
pla
|
||
|
|
rts
|
||
|
|
|