27 lines
348 B
ArmAsm
27 lines
348 B
ArmAsm
|
.define .exg
|
||
|
|
|
||
|
|
! d0 : exchange size in bytes
|
||
|
|
.text
|
||
|
|
.exg:
|
||
|
|
move.l (sp)+,.savret
|
||
|
|
movem.l d1/a1/a2,.savreg
|
||
|
|
move.l sp,a1
|
||
|
|
sub.l d0,sp
|
||
|
|
move.l sp,a2
|
||
|
|
asr #1,d0
|
||
|
|
move.l d0,d1
|
||
|
|
1:
|
||
|
|
move.l (a1)+,(a2)+
|
||
|
|
sub #1,d0
|
||
|
|
bgt 1b
|
||
|
|
move.l sp,a1
|
||
|
|
asr #1,d1
|
||
|
|
1:
|
||
|
|
move.l (a1)+,(a2)+
|
||
|
|
sub #1,d1
|
||
|
|
bgt 1b
|
||
|
|
move.l a1,sp
|
||
|
|
movem.l .savreg,d1/a1/a2
|
||
|
|
move.l .savret,-(sp)
|
||
|
|
rts
|