DOS ain't dead - SSE2 in DOS | PAQ8o8z (Jan. 6)

SSE2 in DOS | PAQ8o8z (Jan. 6) (DOSX)

posted by Rugxulo , Usono, 06.01.2008, 05:09

> But disabling paging to prevent the bug from triggering a PF is cca as
> smart as neglecting the existence of a bug and banning the reporting
> person to prevent further posts pointing to this bug :lol3:

Heh.

> Not for me. The Win32 executable works (compiled by Matt ?), yours
> doesn't. :-(

BTW, his default-compiled Win32 .EXE whines about tmpfile access (when run as non-admin on Vista) unlike a manual OpenWatcom build. Weird. (And yet another issue is that his MinGW is 3.4.5, I think, slightly less ideal.)

> You should fix the page fault rather than shooting around with covered
> eyes in the hope to shoot the SSE2/CR4 issue :hungry:

The problem was that I didn't know what was causing it. It turned out that three things (at least) were no-nos: mucking with CRx under Windows, non-16-byte-aligned SSE2 memory access, and accidental pointer misuse re: getenv() ... oops!

> You should remove the CR4 code (since HDPMI32 cares), remove the V86
> "code" (there is no "V86" in PM DPMI code) and fix the SSE-unrelated bugs.
> Maybe you introduced them, maybe they origin from Matt but he has the luck
> that they don't generate symptoms on Win32 :-|
>
> PS: definitely NOT a JEMM386 issue :clap:

Yeah, I think it works now (tested under QEMU):

http://rugxulo.googlepages.com/paq8o8z-jan6.7z

Of course, as you mentioned, CWSDPMI doesn't emulate CRx access, and even though I like HDPMI32, I preferred to go with the "all-in-one" solution (DPMI server + .EXE a la D3X). Seems to work (DJGPP output's CRC32 matched the Win32 one under HX under QEMU). Feel free to test it, though. ;-)

> PPSS: PAQ9 is out :lol3:

But based on different stuff: two mixers, no external .ASM, meant to be (ideally, 2x) faster than LPQ1 (?) but portably supporting archives > 2 GB. Or something like that.

---
Know your limits.h

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Complete thread:

SSE in DOS under JEMM386 ?? - Rugxulo, 03.01.2008, 06:54 (DOSX)
- SSE in DOS under JEMM386 ?? - DOS386, 03.01.2008, 08:12
  - SSE in DOS under JEMM386 ?? - Rugxulo, 04.01.2008, 01:03
- SSE in DOS under JEMM386 ?? - Japheth, 03.01.2008, 09:19
  - SSE in DOS under JEMM386 ?? - Rugxulo, 04.01.2008, 01:05
    - SSE in DOS under JEMM386 ?? - Japheth, 04.01.2008, 09:44
      - SSE in HDPMI / bug (c/c) - DOS386, 04.01.2008, 10:20
        SSE in HDPMI / bug (c/c) - Japheth, 04.01.2008, 11:12
        SSE in HDPMI / bug (c/c) - Rugxulo, 04.01.2008, 22:39
      - SSE in DOS under JEMM386 ?? - Rugxulo, 07.01.2008, 14:49
        SSE in DOS under JEMM386 ?? - Japheth, 07.01.2008, 17:42
        SSE in DOS under JEMM386 ?? - Rugxulo, 09.01.2008, 01:23
        SSE in DOS under JEMM386 ?? - Rugxulo, 09.01.2008, 10:46
        SSE in DOS -> Illegal Instruction Exception - DOS386, 10.01.2008, 01:22
        SSE in DOS -> Illegal Instruction Exception - Steve, 10.01.2008, 08:46
        SSE in DOS -> alignment issues - Rugxulo, 10.01.2008, 22:21
        SSE in DOS under JEMM386 ?? - Japheth, 10.01.2008, 17:19
- SSE in pure DOS - Rugxulo, 04.01.2008, 06:09
  - Secure Socket Extremism in DOS | You maybe have a Page Foul - DOS386, 04.01.2008, 07:52
    - SSE in DOS | Page Fault | JEMM386 / HDPMI32 - Rugxulo, 04.01.2008, 22:47
      - SSE in DOS | Page Fault <- YES, your bug | HDPMI32 - DOS386, 05.01.2008, 02:19
        SSE2 in DOS | PAQ8o8z (Jan. 6) - Rugxulo, 06.01.2008, 05:09
        SSE2 in DOS | PAQ8o8z (Jan. 6) - DOS386, 08.01.2008, 02:00
- MS the "only hope"? - Japheth, 04.01.2008, 12:11
  - MS the "only hope"? - RayeR, 04.01.2008, 18:09
    - MS the "only hope"? - Japheth, 04.01.2008, 19:16
      - MS the "only hope"? - RayeR, 04.01.2008, 22:17
      - MS the "only hope"? (Vista DPMI bug: 32 MB max.) - Rugxulo, 04.01.2008, 22:31
        MS the "only hope" ? NOT for me !!! - DOS386, 05.01.2008, 02:22
        MS the "only hope" ? NOT for me !!! - RayeR, 05.01.2008, 18:58
        MS the "only hope" ? NOT for me !!! Multiboot - DOS386, 08.01.2008, 01:47
        NTVDM forever! - Japheth, 08.01.2008, 09:02
        MS the "only hope" ? NOT for me !!! Multiboot - Steve, 08.01.2008, 13:54
        MS the "only hope" ? NOT for me !!! Multiboot - Rugxulo, 09.01.2008, 01:19
        MS the "only hope" ? NOT for me !!! Multiboot - RayeR, 14.01.2008, 21:34
        A TSR worth a try in Vista - Japheth, 05.01.2008, 11:04
        A TSR worth a try in Vista - Rugxulo, 05.01.2008, 21:08
        A TSR worth a try in Vista - Khusraw, 07.01.2008, 11:06
        A TSR worth a try in Vista - Rugxulo, 07.01.2008, 14:44
        A TSR worth a try in Vista - Japheth, 07.01.2008, 17:34
        A TSR worth a try in Vista - Rugxulo, 09.01.2008, 01:09