ack/mach/i86/libem/cms.s

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ArmAsm
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.sect .text; .sect .rom; .sect .data; .sect .bss
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.define .cms
! #bytes in cx
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.sect .text
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.cms:
pop bx ! return address
mov dx,sp
push si
push di
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mov si,dx
add dx,cx
mov di,dx
add dx,cx
sar cx,1
repe cmps
je 1f
inc cx
1:
pop di
pop si
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mov sp,dx
jmp bx