mirror of
https://github.com/cc65/cc65.git
synced 2025-03-09 20:31:24 +00:00
21 lines
379 B
ArmAsm
21 lines
379 B
ArmAsm
;
|
|
; Ullrich von Bassewitz, 06.08.1998
|
|
;
|
|
; CC65 runtime: Scale the primary register
|
|
;
|
|
|
|
.export asreax1
|
|
.importzp sreg, tmp1
|
|
|
|
asreax1:
|
|
stx tmp1
|
|
ldx sreg+1
|
|
cpx #$80 ; Get bit 7 into carry
|
|
ror sreg+1
|
|
ror sreg
|
|
ror tmp1
|
|
ror a
|
|
ldx tmp1
|
|
rts
|
|
|