Re: Why no AGH instruction?

2013-06-24 Thread Martin Truebner
There is lots of room in the E3xx range close to CGH and/or LGH. E310 to E312 and/or E337 thru E33D We will see next month. -- Martin Pi_cap_CPU - all you ever need around MWLC/SCRT/CMT in z/VSE more at http://www.picapcpu.de

Re: Why no AGH instruction?

2013-06-24 Thread robin
From: Steve Smith sasd...@gmail.com Sent: Monday, June 24, 2013 12:24 PM I've been converting some code to use full 64-bit registers lately, and was greatly surprised that there appears to be no AGH (Add Halfword (to 64-bit register)). There's LGH, and even CGH, as well as AGHI (much less

Re: Why no AGH instruction?

2013-06-24 Thread Binyamin Dissen
XI** are more important in my opinion. On Mon, 24 Jun 2013 09:11:12 +0200 Martin Truebner mar...@pi-sysprog.de wrote: :There is lots of room in the E3xx range close to CGH and/or LGH. : :E310 to E312 and/or E337 thru E33D : :We will see next month. -- Binyamin Dissen bdis...@dissensoftware.com

Re: Why no AGH instruction?

2013-06-24 Thread Steve Smith
On Mon, Jun 24, 2013 at 12:55 AM, Ed Jaffe edja...@phoenixsoftware.comwrote: The lack of AGH/SGH is a noticeable (and sometimes frustrating) gap in the architecture. Well, that's disappointing. I always thought the system architects were damn close to being infallible and omnipotent :-).

Re: Why no AGH instruction?

2013-06-24 Thread Don Higgins
Steve, all It does look like AGH is missing. If not using register is more important than being RENT, here is test macro program which uses MVC and AGHI: * TEST AGH MACRO WHICH AVOIDS USING EXTRA REGISTER * BUT IS NOT RENT * DON HIGGINS 06/24/13 MACRO N AGH RG,SH MVC

Re: Why no AGH instruction?

2013-06-24 Thread John McKown
I'll put in my comment. I don't think that the current z architects are driven by how will assembler programmers use the architecture any more. Neither are they theoretical computer architects who are wedded to an orthogonal instruction set. To me, many of the new instruction have been introduced

Re: Why no AGH instruction?

2013-06-24 Thread Paul Gilmartin
On 2013-06-24, at 08:18, Don Higgins wrote: It does look like AGH is missing. If not using register is more important than being RENT, here is test macro program which uses MVC and AGHI: snip! With a suitable work area, a RENT version could be designed. But I suspect Charlie Brown, of

Re: Why no AGH instruction?

2013-06-24 Thread John McKown
Thanks. But that makes them even more expensive to implement. Which could be a further reason as to why they weren't. On Mon, Jun 24, 2013 at 10:05 AM, Ed Jaffe edja...@phoenixsoftware.comwrote: On 6/24/2013 7:42 AM, John McKown wrote: given that most of these new instructions are likely