mirror of
https://github.com/cc65/cc65.git
synced 2024-12-25 17:29:50 +00:00
38 lines
532 B
ArmAsm
38 lines
532 B
ArmAsm
;
|
|
; Ullrich von Bassewitz, 06.08.1998
|
|
;
|
|
; CC65 runtime: xor on longs
|
|
;
|
|
|
|
.export tosxor0ax, tosxoreax
|
|
.import addysp1
|
|
.importzp sp, sreg, tmp1
|
|
|
|
tosxor0ax:
|
|
ldy #$00
|
|
sty sreg
|
|
sty sreg+1
|
|
|
|
tosxoreax:
|
|
ldy #0
|
|
eor (sp),y ; byte 0
|
|
sta tmp1
|
|
iny
|
|
txa
|
|
eor (sp),y ; byte 1
|
|
tax
|
|
iny
|
|
lda sreg
|
|
eor (sp),y ; byte 2
|
|
sta sreg
|
|
iny
|
|
lda sreg+1
|
|
eor (sp),y ; byte 3
|
|
sta sreg+1
|
|
|
|
lda tmp1
|
|
jmp addysp1
|
|
|
|
|
|
|