Not only no but hell no.

JNE foo generates A74 with a mask of F, the same code as BRC 15,foo; BNE foo 
generates 47 with a mask of F, the same code as BC 15,foo.


--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3

________________________________________
From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf of 
Mike Shaw <techsupp...@quickref.com>
Sent: Tuesday, August 13, 2019 10:33 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: [SUSPECTED SPAM] Re: Instruction speeds

On 8/12/2019 9:33 PM, Christopher Y. Blaicher wrote:
> ...<snip>...>
> JUMPs are faster than BRANCHes.
> ...<snip>..

I don't know what you mean by that Chris.

The various types of Jump instructions are just extended mnemonics for
various types of Branch instructions. JNE generates the same machine
instruction as BNE, etc.

Do you mean the combined compare and jump instructions like CLGRJ?

Mike Shaw
MVS/QuickRef Support Group
Chicago-Soft, Ltd.

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