Date: Sun, 5 Nov 1995 12:37:43 -0800 From: Mark Diekhans <markd@grizzly.com> To: freebsd-hackers@freebsd.org Subject: NPX still broken in 2.1.0-951104-SNAP... Message-ID: <199511052037.MAA05509@Grizzly.COM>
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It appears (from looking at the code) that the floating point exception
register is still broken in the latest SNAP. I bug reported this eons ago
against 2.0, it generated a bit of discussion and I believe I got a response
to the bug report saying it was fixed. This breaks pretty much any program
that wants to get a status back from the floating point math functions instead
of a core dump. Tcl is most notable, but it breaks several other packages as
well.
This program should not core dump:
#include <math.h>
#include <stdio.h>
main ()
{
printf ("acos (2.0) = %g\n", acos (2.0));
}
Please fix this before releasing, its a big pain for us portable
software maintainers. This patch fixed it for me:
*** sys/i386/include/npx.h.ORG Tue Jan 17 21:51:47 1995
--- sys/i386/include/npx.h Sat Jan 21 12:56:44 1995
***************
*** 133,139 ****
#define __INITIAL_NPXCW__ __iBCS_NPXCW__
#endif
#else
! #define __INITIAL_NPXCW__ __BDE_NPXCW__
#endif
#ifdef KERNEL
--- 133,139 ----
#define __INITIAL_NPXCW__ __iBCS_NPXCW__
#endif
#else
! #define __INITIAL_NPXCW__ __BETTER_BDE_NPXCW__
#endif
#ifdef KERNEL
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