On Mon, 12 Aug 2019 20:48:18 -0400, Brian Chapman <bchapma...@gmail.com> wrote:

>Hi everyone,
>
>I did some searching, but I didn't find anything that really discussed this
>on the topic that I'm interested. Is there anything published that compares
>the cycle times of the most used instructions?
>
>For example; moving an address between areas of storage. I would assume
>that executing a LOAD and STORE would be much quicker than executing a MVC.
>
>Or executing a LOAD ADDRESS to increment a register instead of ADD HALF
>WORD.
>
>Or does this really matter as much as ordering the instructions so they are
>optimized for the pipeline?
>

There used to be, with every new IBM System/360 machine, a "Functional 
Characteristics" publication stating "Instruction Times" in microseconds.
Here is one for the IBM System/360 Model 85:

http://www.bitsavers.org/pdf/ibm/360/funcChar/A22-6916-1_360-85_funcChar_Jun68.pdf

See page 27.

----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN

Reply via email to