From: already5chosen@yahoo.com   
      
   On Sun, 14 Sep 2025 10:19:08 -0000 (UTC)   
   Thomas Koenig  wrote:   
      
   > Michael S  schrieb:   
   > > On Sun, 14 Sep 2025 07:18:38 -0000 (UTC)   
   > > Thomas Koenig  wrote:   
   > >   
   > >> Michael S  schrieb:   
   > >> > On Sat, 13 Sep 2025 14:55:58 -0000 (UTC)   
   > >> > Thomas Koenig  wrote:   
   > >> >   
   > >> >> Similarly, rounding modes are saved and restored for   
   > >> >> procedures.   
   > >> >   
   > >> > I am not sure that I understand.   
   > >> > 1. Is Fortran's equivalent of C's fesetround() is considered a   
   > >> > languge primitive rather than procedure?   
   > >>   
   > >> Fortran has intrinsic procedures (like SIN, MATMUL or CPU_TIME),   
   > >> procedures from intrinsic modules, like COMPILER_OPTIONS   
   > >> from ISO_FORTRAN_ENV, and user-defined procedures.   
   > >> IEEE_SET_ROUNDING_MODE is a procedure from an intrinsic module   
   > >> (but an optional one).  It need not be an external function;   
   > >> the compiler is free to do other things to implement it.   
   > >>   
   > >> (Hope this answers your question)   
   > >>   
   > >   
   >   
   > OOOPS.   
   >   
   > Seems I misread the standard, missing out on clause 17.4 paragraph 5,   
   > which states   
   >   
   > In a procedure other than IEEE_SET_ROUNDING_MODE or IEEE_SET_STATUS,   
   > the processor shall not change the rounding modes on entry, and   
   > on return shall ensure that the rounding modes are the same as   
   > they were on entry.   
   >   
   > So, that part of my premise was wrong. Sorry.   
      
   Now it sounds like matching Kahan's intentions.   
      
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