27 lines
402 B
ArmAsm
27 lines
402 B
ArmAsm
.define .cii
|
|
.sect .text
|
|
.sect .rom
|
|
.sect .data
|
|
.sect .bss
|
|
|
|
.sect .text
|
|
.cii:
|
|
move.l (sp)+, a0 ! return address
|
|
move.l (sp)+, d0 ! destination size
|
|
sub.l (sp)+, d0 ! destination - source size
|
|
bgt 1f
|
|
sub.l d0, sp ! pop extra bytes
|
|
jmp (a0)
|
|
1:
|
|
clr.l d1
|
|
tst.l (sp)
|
|
bne 4f
|
|
not.l d1 ! d1 contains sign of source
|
|
4:
|
|
asr.l #2, d0
|
|
sub.l #1, d0
|
|
2:
|
|
move.l d1, -(sp)
|
|
dbf d0, 2b
|
|
jmp (a0)
|
|
.align 2
|