Re: standards on SIGFPE for divide by zero?

[Greg Troxel <gdt%ir.bbn.com@localhost>]

  My question is:  what do the relevant standards say about this?  Is it
  required to SIGFPE?  If it's required, I'll file a PR against
  port-powerpc and mark the tests expected-fail on ppc.  If not, then
  I'll skip them on ppc.

I dimly recall that it's required to be able to set this mode, but that
it doesn't have to be the default.  I think this is controlled by
IEEE754, but note that vax is different.

See fpgetmask(3).  Maybe the test should set FP_X_DZ.

Regardless of standards, it's probably good for NetBSD to be consistent
across ports on default fp behavior.

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