33 lines
393 B
ArmAsm
33 lines
393 B
ArmAsm
.define .inn
|
|
.sect .text
|
|
.sect .rom
|
|
.sect .data
|
|
.sect .bss
|
|
|
|
! d0 : set size in bytes
|
|
! d1 : bitnumber
|
|
|
|
.sect .text
|
|
.inn:
|
|
move.l (sp)+,d2 ! return address
|
|
move.w (sp)+,d1
|
|
move.l sp,a1
|
|
add d0,a1
|
|
move.l sp,a0
|
|
move.l d2,-(sp)
|
|
move d1,d2
|
|
asr #3,d2
|
|
bchg #0,d2
|
|
cmp d0,d2
|
|
bcc 1f
|
|
add d2,a0
|
|
btst d1,(a0)
|
|
beq 1f
|
|
move.l #1,d0
|
|
bra 2f
|
|
1:
|
|
clr d0
|
|
2:
|
|
move.l (sp)+,a0
|
|
move.l a1,sp
|
|
jmp (a0)
|