From: rick.c.hodgin@gmail.com   
      
   On 9/18/2019 6:58 PM, Sjouke Burry wrote:   
   > On 18.09.19 14:05, Rick C. Hodgin wrote:   
   >> On 9/18/2019 6:51 AM, Bart wrote:   
   >>> On 17/09/2019 08:54, Ruud Baltissen wrote:   
   >>>> Hello,   
   >>>>   
   >>>> I'm working on my own OS, meant to run on various 8088 based   
   >>>> machines, not   
   >>>> just the PC. I'm also programming my own Pascal compiler that should   
   >>>> run   
   >>>> under that OS. It is able to compile itself, it only outputs macros   
   >>>> and it   
   >>>> is up to the assembler plus an INC file to turn it in a running   
   >>>> program. So   
   >>>> far I was able to create programs that run on a Commodore 64. I'm   
   >>>> now busy   
   >>>> now to create an INC file for the 8088. Outputting a string under my   
   >>>> OS or   
   >>>> MS-DOS goes fine. But I also need to fill the macros needed for the   
   >>>> mathematical functions. I could invent the wheel twice but handling   
   >>>> REALs   
   >>>> is not easy. But Google wasn't my friend this time.   
   >>>>   
   >>>> So I'm looking for a mathematical library in assembler for the 8088.   
   >>>> Can   
   >>>> anybody help, please?   
   >>>   
   >>> Do these machines also have an 8087? That would help!   
   >>>   
   >>> Otherwise, a software library operating to modern standards, and   
   >>> working with   
   >>> 64-bit IEEE, sounds like it's going be rather slow.   
   >>   
   >> I searched for it but couldn't find it.  There used to be an 8087.asm   
   >> app that worked with DOS.  It would install a software emulator for   
   >> the 8086/8088 CPUs so it would work with native x87 FPU instructions.   
   >> I may still have it on one of my Programmer's Heaven CDs from back in   
   >> the BBS days.   
   >>   
   >> It was fully IEEE-754 compliant and could be adapted.  In fact, IIRC,   
   >> a version of that program was used to find the famous Pentium FDIV   
   >> bug, as the software version was reporting correctly, and the Pentium   
   >> was reporting incorrectly, over a particular range of inputs.   
   >   
   > On my dosmachines fortran(MS 5.1) and C(MS 6.00a) support   
   > linking with FPU and without.   
      
   Yes.  It allowed function calls to be generated instead of x87/x387   
   opcodes.  IIRC, the emulated functionality wasn't fully IEEE-754   
   compliant.  Also, 80-bit support was later phased out, leaving only   
   32-bit and 64-bit support in the language, and (IIRC) the emulation   
   library, so code you have in MS 6.0 would no longer compile.   
      
   --   
   Rick C. Hodgin   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)