ack/mach/m68020/libem/cms.s

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.define .cms
.sect .text
.sect .rom
.sect .data
.sect .bss
.sect .text
! d0 contains set size
! on exit d0 is zero for equal, non-zero for not equal
.cms:
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move.l (sp)+, d1 ! return address
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move.l sp, a0 ! address of top block
lea (sp,d0.l), a1 ! address of lower block
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move.l d1,-(sp)
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move.l d0, d1
asr.l #2, d0
1:
cmp.l (a0)+, (a1)+
bne 2f
sub.l #1, d0
bne 1b
2:
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move.l (sp)+,a0
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lea (sp,d1.l*2), sp ! new sp; two blocks popped
jmp (a0)
.align 2