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From: Marcel Moolenaar <marcel@FreeBSD.org>
Date: Wed, 22 Oct 2003 02:00:07 -0700 (PDT)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org,
	cvs-all@FreeBSD.org
X-FreeBSD-CVS-Branch: HEAD
Subject: cvs commit: src/lib/libc/ia64/gen fpgetmask.c fpsetmask.c
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marcel      2003/10/22 02:00:07 PDT

  FreeBSD src repository

  Modified files:
    lib/libc/ia64/gen    fpgetmask.c fpsetmask.c 
  Log:
  The FP status register allows for 6 traps to be masked. One of them,
  the denormal/unnormal trap, is not a standard IEEE trap. We did
  not exclude it from being returned by fpgetmask(), nor did we make
  sure that fpsetmask() didn't clobber it. Since the non-IEEE trap
  is not part of fp_except_t, users of ifpgetmask()/fpsetmask() would
  be confronted with unexpected behaviour, one of which is a SIGFPE
  for denormal/unnormal FP results.
  
  This commit makes sure that we don't leak the denormal/unnormal mask
  bit in fp_except_t and also that we don't clobber it.
  
  Revision  Changes    Path
  1.4       +1 -1      src/lib/libc/ia64/gen/fpgetmask.c
  1.4       +2 -2      src/lib/libc/ia64/gen/fpsetmask.c