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Forum Index : Microcontroller and PC projects : CMM2: Forth - proof of concept
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thwill Guru  Joined: 16/09/2019 Location: United KingdomPosts: 3830 |
Hi folks, after 3 weeks of hiding from the wife and kids  :Option Explicit On Option Base 0 Option Default None #include "spforth.inc" calculate_in_basic(5000) calculate_in_forth(5000) End Sub calculate_in_basic(limit%) Local n%, k%, t% Local flags%(limit%) t% = Timer For n% = 2 To Sqr(limit%) If flags%(n%) = 0 Then For k% = n%*n% To limit% Step n% flags%(k%) = 1 Next k% EndIf Next n% Print "Primes:"; For n% = 2 To limit% If flags%(n%) = 0 Then Print n%; Next n% t% = Timer - t% Print "TOTAL:" (t% / 1000) " s" End Sub Sub calculate_in_forth(limit%) Local t_init% Local t_compile% Local t_execute% Local mem_size% = 100 * 1024 ' 100 K Local memory%(mem_size% \ 8) ' Each integer is 8 bytes t_init% = Timer spforth(memory%(), mem_size%, ""); t_init% = Timer - t_init% t_compile% = Timer spforth(memory%(), 0, ": prime? here @ + c@ 0= ;") spforth(memory%(), 0, ": composite! here @ + 1 swap c! ;") spforth(memory%(), 0, ": sieve") spforth(memory%(), 0, " here @ over erase") spforth(memory%(), 0, " 2") spforth(memory%(), 0, " begin") spforth(memory%(), 0, " 2dup dup * >") spforth(memory%(), 0, " while") spforth(memory%(), 0, " dup prime? if") spforth(memory%(), 0, " 2dup dup * do") spforth(memory%(), 0, " i composite!") spforth(memory%(), 0, " dup +loop") spforth(memory%(), 0, " then") spforth(memory%(), 0, " 1+") spforth(memory%(), 0, " repeat") spforth(memory%(), 0, " drop") spforth(memory%(), 0, " ." + Chr$(34) + " Primes: " + Chr$(34) + " 2 do i prime? if i . then loop ;") t_compile% = Timer - t_compile% t_execute% = Timer spforth(memory%(), 0, Str$(limit%) + " sieve") t_execute% = Timer - t_execute% Print "Initialisation time:" t_init% / 1000 " s" Print "Compile time: " t_compile% / 1000 " s" Print "Execute time: " t_execute% / 1000 " s" Print "TOTAL: " (t_init% + t_compile% + t_execute%) / 1000 " s" End Sub Of course you will need the ridiculous CSUB (compiled with -O3) contained within this file too: spforth.zip. Is there a prize for largest CSUB? do I win it? Output on a 400 MHz CMM2: > run "forth_test.bas" Primes: 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97 101 103 107 109 113 127 131 137 139 149 151 157 163 167 173 179 181 191 193 197 199 211 223 227 229 233 239 241 251 257 263 269 271 277 281 283 293 307 311 313 317 331 337 347 349 353 359 367 373 379 383 389 397 401 409 419 421 431 433 439 443 449 457 461 463 467 479 487 491 499 503 509 521 523 541 547 557 563 569 571 577 587 593 599 601 607 613 617 619 631 641 643 647 653 659 661 673 677 683 691 701 709 719 727 733 739 743 751 757 761 769 773 787 797 809 811 821 823 827 829 839 853 857 859 863 877 881 883 887 907 911 919 929 937 941 947 953 967 971 977 983 991 997 1009 1013 1019 1021 1031 1033 1039 1049 1051 1061 1063 1069 1087 1091 1093 1097 1103 1109 1117 1123 1129 1151 1153 1163 1171 1181 1187 1193 1201 1213 1217 1223 1229 1231 1237 1249 1259 1277 1279 1283 1289 1291 1297 1301 1303 1307 1319 1321 1327 1361 1367 1373 1381 1399 1409 1423 1427 1429 1433 1439 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4651 4657 4663 4673 4679 4691 4703 4721 4723 4729 4733 4751 4759 4783 4787 4789 4793 4799 4801 4813 4817 4831 4861 4871 4877 4889 4903 4909 4919 4931 4933 4937 4943 4951 4957 4967 4969 4973 4987 4993 4999 TOTAL: 0.172 s SPFORTH v0.1.0 22295 CELLS REMAINING OK Primes: 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97 101 103 107 109 113 127 131 137 139 149 151 157 163 167 173 179 181 191 193 197 199 211 223 227 229 233 239 241 251 257 263 269 271 277 281 283 293 307 311 313 317 331 337 347 349 353 359 367 373 379 383 389 397 401 409 419 421 431 433 439 443 449 457 461 463 467 479 487 491 499 503 509 521 523 541 547 557 563 569 571 577 587 593 599 601 607 613 617 619 631 641 643 647 653 659 661 673 677 683 691 701 709 719 727 733 739 743 751 757 761 769 773 787 797 809 811 821 823 827 829 839 853 857 859 863 877 881 883 887 907 911 919 929 937 941 947 953 967 971 977 983 991 997 1009 1013 1019 1021 1031 1033 1039 1049 1051 1061 1063 1069 1087 1091 1093 1097 1103 1109 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4273 4283 4289 4297 4327 4337 4339 4349 4357 4363 4373 4391 4397 4409 4421 4423 4441 4447 4451 4457 4463 4481 4483 4493 4507 4513 4517 4519 4523 4547 4549 4561 4567 4583 4591 4597 4603 4621 4637 4639 4643 4649 4651 4657 4663 4673 4679 4691 4703 4721 4723 4729 4733 4751 4759 4783 4787 4789 4793 4799 4801 4813 4817 4831 4861 4871 4877 4889 4903 4909 4919 4931 4933 4937 4943 4951 4957 4967 4969 4973 4987 4993 4999 Initialisation time: 0.01 s Compile time: 0.001 s Execute time: 0.13 s TOTAL: 0.141 s If I'm completely honest then I'm a bit disappointed that the Forth isn't significantly faster. HOWEVER currently the BEGIN, WHILE, IF, THEN, DO, +LOOP, etc. keywords are all defined in terms of lower-level Forth words. If I implement them in C instead then I will probably get a measurable performance improvement. I'm going for a lie down. Best wishes, Tom Edited 2021-03-11 01:29 by thwill Game*Mite, CMM2 Welcome Tape, Creaky old text adventures |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 8566 |
WOW!!!   |
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| thwill Guru Joined: 16/09/2019 Location: United KingdomPosts: 3830 |
I should have said in my first post that this isn't 100% my own work, I ported an x86 assembler Forth implementation https://github.com/nornagon/jonesforth to "C" and then just had to debug it and solve the problems with CMM2/CSUB compatibility. Before I discovered jonesforth I did get 25% of the way there on my own and then had to decide between porting someone else's work and getting it done ASAP, or doing it all myself and not having it until the summer - if then, I chose the former but am glad I made a start on my own. Best wishes, Tom Edited 2021-03-11 02:19 by thwill Game*Mite, CMM2 Welcome Tape, Creaky old text adventures |
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| thwill Guru Joined: 16/09/2019 Location: United KingdomPosts: 3830 |
You say that, but give me a few weeks and I'll probably be asking all sorts of questions about ARMCFunctions.h - and for all sorts of additions. Currently it just uses getConsole(), putConsole() and RoutineChecks(). Best wishes, Tom Edited 2021-03-11 02:10 by thwill Game*Mite, CMM2 Welcome Tape, Creaky old text adventures |
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Plasmamac Guru Joined: 31/01/2019 Location: GermanyPosts: 501 |
Really a WOW ! Plasma |
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| thwill Guru Joined: 16/09/2019 Location: United KingdomPosts: 3830 |
A couple of minor tweaks and things are looking better: > run Primes: ... output deleted for brevity... TOTAL: 0.16 s SPFORTH v0.1.0 22294 CELLS REMAINING OK Primes: ... output deleted for brevity... Initialisation time: 0.009 s Compile time: 0.001 s Execute time: 0.094 s TOTAL: 0.104 s So the Forth version is now a good 50% faster than the MMBasic version and I haven't even broken out the "bug guns" yet. Note the MMBasic version is faster than my initial measurement too since I removed the unnecessary variables from the NEXT statements. Best wishes, Tom Edited 2021-03-12 03:08 by thwill Game*Mite, CMM2 Welcome Tape, Creaky old text adventures |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 8566 |
Are you going to eventually allow reading arbitrary forth from file? |
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| thwill Guru Joined: 16/09/2019 Location: United KingdomPosts: 3830 |
You can do it now. Use MMBasic to read lines from the file and call spforth() with them one at a time. You're only paying the cost for this once whilst they are compiled. Now if you added a construct to the pre-processor equivalent to C's: #if 0 ignore this, and this, and this #endif Then I could read Forth from the .BAS file and we have "inline assembler" ... I think it should be possible to get Forth at least twice as fast as MMBasic if not more. Best wishes, Tom Game*Mite, CMM2 Welcome Tape, Creaky old text adventures |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 8566 |
Not a pre-processor issue - it would need to somehow skip the tokenising which is core MMbasic. In essence you are asking for a data statement without the DATA command. I think something like a CSUB block but allowing ascii could work as this could be generally useful. I'll have a think. Of course you need to do better then a 0.94/1.6 ratio in performance terms to make it worthwhile  |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 8566 |
I've managed to "acquire" a couple of command slots so my initial thoughts are: DEFINEDATA n ascii more ascii as much ascii as you like END DEFINEDATA ? MM.INFO(DATA ADDRESS n) ' gives the address in memory of the start of the ascii data block number n ? MM.INFO(DATA SIZE n) ' gives the length in bytes of the data block number n Limitations: You can't have "END DEFINEDATA" in the ascii for obvious reasons. You also can't use the C "or" character in the ascii (|) This is a lot of work as I have to stop the firmware interfering with the ascii in quite a few places so I need to know if it will be worthwhile. Edited 2021-03-12 05:55 by matherp |
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| thwill Guru Joined: 16/09/2019 Location: United KingdomPosts: 3830 |
Thanks Peter, As far as Forth goes I should have all the easy and medium difficulty performance gains worked through within a couple of weeks so you can make a judgement call then. Beyond that there would be converting some of it directly to ARM Thumb and that's a much longer term prospect with less certainty of success. Best wishes, Tom Game*Mite, CMM2 Welcome Tape, Creaky old text adventures |
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jirsoft Guru Joined: 18/09/2020 Location: Czech RepublicPosts: 532 |
Hi Peter, just an stupid idea, couldn't you use something similar to ON ERROR SKIP? DEFINEDATA n, 4 (#of lines with data) ascii '1. line more ascii '2. line as much ascii as you like '3. line END DEFINEDATA '4. line? Of course, END DEFINEDATA is now not so important... Jiri Napoleon Commander and SimplEd for CMM2 (GitHub), CMM2.fun |
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TassyJim Guru Joined: 07/08/2011 Location: AustraliaPosts: 5879 |
Charles Moore will be impressed. I still have my copy of Leo Brodie's "Starting Forth"  But I notice that it is available as a PDF from https://www.forth.com/starting-forth/ The followup book, "Thinking Forth" is also available as a PDF. I enjoyed playing with Forth all those years ago. Time to see if the magic is still there. Jim VK7JH MMedit MMBasic Help |
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OA47 Guru Joined: 11/04/2012 Location: AustraliaPosts: 899 |
@ Jim, From the front cover, it looks like cloud computing is not as new as I thought.  OA47 |
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| TassyJim Guru Joined: 07/08/2011 Location: AustraliaPosts: 5879 |
No, that's the dust cloud from pulling the book of the shelf. I should point out that the image is from the net, my copy is a bit more 'used' than depicted. Jim VK7JH MMedit MMBasic Help |
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CircuitGizmos Guru Joined: 08/09/2011 Location: United StatesPosts: 1421 |
DEFINEDATA n ascii more ascii as much ascii as you like END DEFINEDATA I've done hex with CSUB. Works well but seems likely to be obscure to newbies and is inflexible. Would it be reasonable to support different data types? DEFINEDATA n ascii END DEFINEDATA DEFINEDATA n AS BYTE 00 0E 37 A9 40 04 00 CC END DEFINEDATA DEFINEDATA n AS WORD 000E 37A9 4004 00CC END DEFINEDATA And (dangerously) store it in FLASH? Caveat emptor/programmer DEFINEDATA n AS WORD at &H081C0000 000E 37A9 4004 00CC END DEFINEDATA Micromites and Maximites! - Beginning Maximite |
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vegipete Guru Joined: 29/01/2013 Location: CanadaPosts: 1082 |
What is ascii data? Only 7 bit values from 32 to 127, not including 124? Full 8 bit binary data would be useful for embedding graphics, sprites and sound. (And machine code for a 6502 simulator. ;-) Visit Vegipete's *Mite Library for cool programs. |
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| CircuitGizmos Guru Joined: 08/09/2011 Location: United StatesPosts: 1421 |
Well, actually, supplying a CSUB for FLASH write/erase would be better than adding this to the core language. And why the C "or" ( | ) out of curiosity? Edited 2021-03-12 08:06 by CircuitGizmos Micromites and Maximites! - Beginning Maximite |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 8566 |
No for the reason explained above - the code would be tokenised and therefore changed You can do this already with a FONT or CSUB. Obscure ? yes, but identical in function so no reason to add Flash can only be erased in 128Kb chunks - far too coarse to be of any use I use it internally for line number error handling and include files |
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| thwill Guru Joined: 16/09/2019 Location: United KingdomPosts: 3830 |
I have a spiral bound printed PDF of that book and the 35th Anniversary Edition reproduction of the "Jupiter ACE (FORTH Programming)" manual even as I type. Thankyou, I will snag and print a copy. Might want to give it a few weeks, it's just a "proof of concept", now I need to find out if it can be made fast enough to "matter" and then worry about filling in the gaps and improving its compliance with Brodie's books. Best wishes, Tom Edited 2021-03-12 10:12 by thwill Game*Mite, CMM2 Welcome Tape, Creaky old text adventures |
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