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Re: embedded forth

From rickman <gnuarm@gmail.com>
Newsgroups comp.lang.forth
Subject Re: embedded forth
Date 2017-02-09 05:19 -0500
Organization A noiseless patient Spider
Message-ID <o7hfk8$c0t$1@dont-email.me> (permalink)
References (16 earlier) <0c5b0081-b02a-4fb7-9796-12f3c25a2ed6@googlegroups.com> <o7evtj$f4c$1@dont-email.me> <2d6eded5-06dd-4385-8087-b90d66bb9720@googlegroups.com> <o7g04r$blr$1@dont-email.me> <9ac7976a-e7b1-46e4-80fa-a9f758a62d7c@googlegroups.com>

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On 2/9/2017 4:14 AM, Ilya Tarasov wrote:
>>>> It is hard to match instruction size to LUT inputs because
>>>> there are often other inputs such as zero detect, interrupt
>>>> state, etc.  That is a
>>>
>>> Excuse me... what? :) Show me the piece of code you are talking
>>> about, please.
>
>> Ok, show us your code for conditional jumps.  That would require
>> six inputs for the opcode and one more for the condition status,
>> no?
>
> Yes and no :) Six inputs will be mapped in LUT6, and 7th will go to
> F7MUX laying next to that LUT. Overall number of LUTs will be
> decreased if proper width of command will be chosen (inluding
> auxiliary signals, of course).

Not sure what you are saying will be decreased compared to what. 
Smaller instruction words will result in smaller decoding logic, that is 
obvious.  I was addressing your point about using a 6 bit instruction 
because of the 6 input LUTs.  My point is there are often extra inputs 
beyond the instruction word and so the match between LUT size and word 
width is not so important.  Wider LUTs reduce the LUT count and narrower 
instructions reduce the LUT count.


>> Like I've said before, I don't need to write VHDL to count inputs
>> to a function.  That function and its inputs must be defined before
>> I can write one line of HDL.
>
> Since you miss additional logic cell resources, you can't predict
> real schematic. For some VHDL expressions, 7-th and 8-th inputs can
> be mapped to additional multiplexers which are presents in latest
> FPGA families.

Sure, but that still uses more resources and runs slower.  The point is 
there is no magic about matching the width of the instruction to the LUT 
inputs.


>>> I can fill pipeline with new thread each cycle without penalty.
>>
>> Yes, that is what I am describing.  You can have as many threads
>> running concurrently as there are levels in your pipeline.
>
> Why do you name it 'concurrently', if one pipeline can write one
> result per cycle? This is sequental, pipelined or maybe another word
> for designation, but not concurrent.

The instruction streams are all running without switching a processor 
between tasks.  Even though they run on consecutive clock cycles, they 
are all running on what is logically separate CPUs at the same time.


>>> This is two separate tasks. Placing many CPUs may be too crude
>>> solution. Geterogenuous CPUs may be more usable.
>>
>> Was that supposed to be "Heterogeneous"?  "Crude" is a value
>> judgement without meaning.  Heterogeneous CPUs are nice when
>> needed, but require specific tools which have to be developed.  It
>> all depends on the gain vs. the cost.  In general I have not found
>> much that can be customized other than adding a few instructions
>> like bit masks or multiplies.  YMMV.
>
> Wide-command, narrow command (and higher clock speed), multithreading
> Forth CPU. Maybe ARM (if exist) or MicroBlaze to get their world
> benefits. DSP engines. Specific tools are provided by Forth, isn't
> it? :) Forth is a very flexible and powerful language and allow to
> create specific languages for embedded very fast.
>
>>> This has a clear goal - to enter the ARM ecosystem. Having known
>>> CPU onchip allows to provide a complete list of ARM-related
>>> feautures, like DDR3/USB/Ethernet under Linux or bare metal. Many
>>> designers from the ARM world can be involved in this case, unlike
>>> for custom-made CPUs, which requires much higher skill to
>>> design.
>>
>> While the J1 was developed specifically because of the need for
>> fast hardware which was not practical by other means.  Programming
>> the ARM by "many designers from the ARM world" means C.  Are your
>> projects in C? Adding memory does not require an ARM.  Adding USB
>> and Ethernet can be done with separate CPUs rather than an special
>> FPGAs that limit your choices and pricing flexibility.  If the
>> ARM-FPGA combo fits your needs fine, but there are huge advantages
>> to soft core CPUs in FPGAs.
>
> Xilinx Zynq series is good enough. There is no practical need to
> rewrite TCP/IP stack on Forth (however, we have limited Ethernet
> support for my CPUs), or to provide SD card support, if it is
> implemented already with known results. Forths is flexible? Ok, so
> let's use it for tasks which requires flexbility. Having C-based
> 'core' running on ARM and frequently changed firmware for Forth CPUs
> is a way to combine benefits from both worlds.
>


-- 

Rick C

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Thread

embedded forth Dale Scott <dalescottnet@gmail.com> - 2017-01-21 11:27 -0800
  Re: embedded forth Paul Rubin <no.email@nospam.invalid> - 2017-01-21 11:31 -0800
  Re: embedded forth stephen@mpeforth.com - 2017-01-22 00:52 -0800
  Re: embedded forth anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-01-22 17:09 +0000
    Re: embedded Forth Dale Scott <dalescottnet@gmail.com> - 2017-01-22 09:43 -0800
      Re: embedded Forth stephen@mpeforth.com - 2017-01-22 12:19 -0800
      Re: embedded Forth albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-01-22 21:25 +0100
      Re: embedded Forth john <anon@example.com> - 2017-01-22 21:04 +0000
        Re: embedded Forth "Elizabeth D. Rather" <erather@forth.com> - 2017-01-22 12:30 -1000
        Re: embedded Forth hughaguilar96@gmail.com - 2017-01-22 20:45 -0800
      Re: embedded Forth stephen@mpeforth.com - 2017-01-22 14:08 -0800
        Re: embedded Forth Paul Rubin <no.email@nospam.invalid> - 2017-01-22 14:55 -0800
          Re: embedded Forth Dale Scott <dalescottnet@gmail.com> - 2017-01-22 20:41 -0800
            Re: embedded Forth Paul Rubin <no.email@nospam.invalid> - 2017-01-22 21:19 -0800
      Re: embedded Forth hughaguilar96@gmail.com - 2017-01-22 21:36 -0800
        Re: embedded Forth Dale Scott <dalescottnet@gmail.com> - 2017-01-22 22:09 -0800
          Re: embedded Forth rickman <gnuarm@gmail.com> - 2017-01-23 04:15 -0500
            Re: embedded Forth Dale Scott <dalescottnet@gmail.com> - 2017-01-23 08:41 -0800
              Re: embedded Forth rickman <gnuarm@gmail.com> - 2017-01-23 14:32 -0500
                Re: embedded Forth Dale Scott <dalescottnet@gmail.com> - 2017-01-23 11:53 -0800
                Re: embedded Forth rickman <gnuarm@gmail.com> - 2017-01-23 15:10 -0500
              Re: embedded Forth Paul Rubin <no.email@nospam.invalid> - 2017-01-23 14:34 -0800
                Re: embedded Forth Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-01-24 03:14 -0600
        Re: embedded Forth rickman <gnuarm@gmail.com> - 2017-01-23 03:43 -0500
          Re: embedded Forth john <anon@example.com> - 2017-01-23 10:32 +0000
          keep secrets (was Re: embedded Forth) "Wolfgang Allinger" <all2001@spambog.com> - 2017-01-23 08:58 -0300
            Re: keep secrets (was Re: embedded Forth) Rod Pemberton <NeedNotReplyHere@xrsevnneqk.cem> - 2017-01-23 07:47 -0500
              Re: keep secrets (was Re: embedded Forth) "Wolfgang Allinger" <all2001@spambog.com> - 2017-01-23 18:18 -0300
                Re: keep secrets (was Re: embedded Forth) rickman <gnuarm@gmail.com> - 2017-01-23 19:15 -0500
            Re: keep secrets (was Re: embedded Forth) rickman <gnuarm@gmail.com> - 2017-01-23 14:38 -0500
              Re: keep secrets (was Re: embedded Forth) "Wolfgang Allinger" <all2001@spambog.com> - 2017-01-23 18:43 -0300
                Re: keep secrets (was Re: embedded Forth) rickman <gnuarm@gmail.com> - 2017-01-23 19:48 -0500
                Re: keep secrets (was Re: embedded Forth) "Elizabeth D. Rather" <erather@forth.com> - 2017-01-23 16:30 -1000
                Re: keep secrets (was Re: embedded Forth) rickman <gnuarm@gmail.com> - 2017-01-23 22:23 -0500
  Re: embedded forth rickman <gnuarm@gmail.com> - 2017-01-22 13:44 -0500
    Re: embedded forth Paul Rubin <no.email@nospam.invalid> - 2017-01-22 13:38 -0800
      Re: embedded forth rickman <gnuarm@gmail.com> - 2017-01-23 00:45 -0500
        Re: embedded forth Dale Scott <dalescottnet@gmail.com> - 2017-01-22 22:44 -0800
          Re: embedded forth Paul Rubin <no.email@nospam.invalid> - 2017-01-23 00:48 -0800
          Re: embedded forth rickman <gnuarm@gmail.com> - 2017-01-23 03:51 -0500
      Re: embedded forth john <anon@example.com> - 2017-01-23 10:02 +0000
    Re: embedded forth anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-01-23 09:01 +0000
      Re: embedded forth albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-01-23 13:05 +0100
        Re: embedded forth rickman <gnuarm@gmail.com> - 2017-01-23 14:40 -0500
          Re: embedded forth Mark Wills <markwills1970@gmail.com> - 2017-01-24 01:12 -0800
          Re: embedded forth albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-01-24 14:38 +0100
            Re: embedded forth rickman <gnuarm@gmail.com> - 2017-01-24 19:51 -0500
              Re: embedded forth albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-01-25 11:34 +0100
                Re: embedded forth rickman <gnuarm@gmail.com> - 2017-01-25 22:13 -0500
                Re: embedded forth albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-01-26 11:36 +0100
                Re: embedded forth rickman <gnuarm@gmail.com> - 2017-01-26 14:07 -0500
              Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-01-26 00:19 -0800
                Re: embedded forth rickman <gnuarm@gmail.com> - 2017-01-26 14:15 -0500
                Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-01-27 13:08 -0800
                Re: embedded forth rickman <gnuarm@gmail.com> - 2017-01-27 17:54 -0500
                Re: embedded forth Paul Rubin <no.email@nospam.invalid> - 2017-01-27 15:29 -0800
                Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-01-27 16:28 -0800
                Re: embedded forth rickman <gnuarm@gmail.com> - 2017-01-27 23:58 -0500
                Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-01-28 11:58 -0800
                Re: embedded forth rickman <gnuarm@gmail.com> - 2017-01-28 15:36 -0500
                Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-01-28 15:05 -0800
                Re: embedded forth Paul Rubin <no.email@nospam.invalid> - 2017-01-28 15:57 -0800
                Re: embedded forth rickman <gnuarm@gmail.com> - 2017-01-28 21:51 -0500
                Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-01-29 09:53 -0800
                Re: embedded forth albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-01-29 19:32 +0100
                Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-01-29 11:53 -0800
                Re: embedded forth rickman <gnuarm@gmail.com> - 2017-01-30 01:10 -0500
                Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-01-29 23:11 -0800
                Re: embedded forth Paul Rubin <no.email@nospam.invalid> - 2017-01-29 23:34 -0800
                Re: embedded forth albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-01-30 12:42 +0100
                Re: embedded forth albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-01-30 12:36 +0100
                Re: embedded forth ctmalan@gmail.com - 2017-01-30 11:02 -0800
                Re: embedded forth Paul Rubin <no.email@nospam.invalid> - 2017-01-30 11:04 -0800
                Re: embedded forth Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-01-31 04:34 -0600
                Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-01-30 12:15 -0800
                Re: embedded forth rickman <gnuarm@gmail.com> - 2017-01-30 10:15 -0500
                Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-01-30 12:20 -0800
                Re: embedded forth Paul Rubin <no.email@nospam.invalid> - 2017-01-30 14:09 -0800
                Re: embedded forth albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-01-31 03:04 +0100
                Re: embedded forth Paul Rubin <no.email@nospam.invalid> - 2017-01-30 20:19 -0800
                Re: embedded forth rickman <gnuarm@gmail.com> - 2017-01-30 17:10 -0500
                Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-01-30 14:38 -0800
                Re: embedded forth rickman <gnuarm@gmail.com> - 2017-01-30 23:09 -0500
                Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-01-31 09:32 -0800
                Re: embedded forth rickman <gnuarm@gmail.com> - 2017-02-08 18:22 -0500
                Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-02-09 01:46 -0800
                Re: embedded forth rickman <gnuarm@gmail.com> - 2017-02-09 05:11 -0500
                Re: embedded forth rickman <gnuarm@gmail.com> - 2017-02-12 01:30 -0500
                Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-02-12 10:21 -0800
                Re: embedded forth rickman <gnuarm@gmail.com> - 2017-02-12 19:37 -0500
                Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-02-14 13:26 -0800
                Re: embedded forth Gary Bergstrom <forthprgrmr@gmail.com> - 2017-02-14 11:36 -0800
                Re: embedded forth rickman <gnuarm@gmail.com> - 2017-02-14 18:13 -0500
                Re: embedded forth rickman <gnuarm@gmail.com> - 2017-01-28 21:51 -0500
                Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-01-29 10:20 -0800
                Re: embedded forth Cecil Bayona <cbayona@cbayona.com> - 2017-01-29 12:38 -0600
                Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-01-29 11:49 -0800
                Re: embedded forth rickman <gnuarm@gmail.com> - 2017-02-04 04:22 -0500
                Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-02-04 17:54 -0800
                Re: embedded forth hughaguilar96@gmail.com - 2017-02-04 20:26 -0800
                Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-02-05 07:53 -0800
                Re: embedded forth hughaguilar96@gmail.com - 2017-02-05 11:08 -0800
                Re: embedded forth hughaguilar96@gmail.com - 2017-02-05 11:39 -0800
                Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-02-08 06:46 -0800
                Re: embedded forth luser droog <mijoryx@yahoo.com> - 2017-02-13 19:17 -0800
                Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-02-15 06:23 -0800
                Re: embedded forth hughaguilar96@gmail.com - 2017-02-15 11:09 -0800
                Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-02-15 15:24 -0800
                Re: embedded forth jkn_gg@nicorp.f9.co.uk - 2017-02-16 09:49 -0800
                Re: embedded forth hughaguilar96@gmail.com - 2017-02-17 09:12 -0800
                Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-02-17 12:47 -0800
                Re: embedded forth hughaguilar96@gmail.com - 2017-02-17 16:18 -0800
                Re: embedded forth luser droog <mijoryx@yahoo.com> - 2017-02-16 08:43 -0800
                Re: embedded forth Alex <alex@rivadpm.com> - 2017-02-05 20:47 +0000
                Re: embedded forth hughaguilar96@gmail.com - 2017-02-05 13:36 -0800
                Re: embedded forth Alex <alex@rivadpm.com> - 2017-02-05 23:18 +0000
                Re: embedded forth hughaguilar96@gmail.com - 2017-02-05 21:10 -0800
                Re: embedded forth Alex <alex@rivadpm.com> - 2017-02-06 11:12 +0000
                Re: embedded forth hughaguilar96@gmail.com - 2017-02-05 21:15 -0800
                Re: embedded forth hughaguilar96@gmail.com - 2017-02-05 22:45 -0800
                Re: embedded forth albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-02-06 12:04 +0100
                Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-02-08 03:08 -0800
                Re: embedded forth rickman <gnuarm@gmail.com> - 2017-02-08 06:39 -0500
                Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-02-08 07:15 -0800
                Re: embedded forth rickman <gnuarm@gmail.com> - 2017-02-08 15:49 -0500
                Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-02-09 01:14 -0800
                Re: embedded forth rickman <gnuarm@gmail.com> - 2017-02-09 05:19 -0500
                Re: embedded forth Ilya Tarasov <ilya74.tarasov@gmail.com> - 2017-02-09 03:48 -0800
                Re: embedded forth rickman <gnuarm@gmail.com> - 2017-02-05 16:08 -0500
                Re: embedded forth rickman <gnuarm@gmail.com> - 2017-02-07 21:59 -0500
                Re: embedded forth albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-01-28 11:10 +0100
                Re: embedded forth rickman <gnuarm@gmail.com> - 2017-01-28 06:15 -0500
                Re: embedded forth albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-01-28 19:48 +0100
                Re: embedded forth rickman <gnuarm@gmail.com> - 2017-01-28 14:37 -0500
                Re: embedded forth mhx@iae.nl - 2017-01-28 07:48 -0800
                Re: embedded forth albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-01-28 19:53 +0100
                Re: embedded forth mhx@iae.nl - 2017-01-28 15:49 -0800
        Re: embedded forth "Wolfgang Allinger" <all2001@spambog.com> - 2017-01-23 18:46 -0300

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