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From: klassen@SOL.UVIC.CA (Melvin Klassen)
Newsgroups: comp.lang.asm370
Subject: Re: MVCL (was Re: why code in 370 Assembler)
Message-ID: <9104302353.AA25466@ucbvax.Berkeley.EDU>
Date: 30 Apr 91 23:50:00 GMT
References: <9104260659.AA07567@ucbvax.Berkeley.EDU>
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Reply-To: IBM 370 Assembly Programming Discussion List
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In article <9104260659.AA07567@ucbvax.Berkeley.EDU> you write:
>
>I've been known to remark that MVCL is an 18 byte RR instruction.
>Let's see now:
>    LA    Rx,source                 4
>    LA    R(x+1),source_length      4
>    LA    Ry,target                 4
>    LA    R(y+1),target_length      4
     ICM   R(y+1),B'1000',=CL1'fill' 4
>    MVCL  Ry,Rx                     2
>                                   ---
>                                   18
                                    22
Sometimes, non-null fill is required!