X-Authentication-Warning: delorie.com: mail set sender to djgpp-workers-bounces using -f From: Kbwms AT aol DOT com Message-ID: <1d8.39b4d0cd.2f748f70@aol.com> Date: Thu, 24 Mar 2005 16:47:28 EST Subject: Change to Value for NAN To: djgpp-workers AT delorie DOT com MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_1d8.39b4d0cd.2f748f70_boundary" X-Mailer: 8.0 for Windows sub 6033 Reply-To: djgpp-workers AT delorie DOT com --part1_1d8.39b4d0cd.2f748f70_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit The value for NAN in src/libc/c99/math/nan_def.c, in 32-bit hex, is: 0x7fffffff This value is a departure from the long-standing time-honored value used in src/libm/math/sf_nan.c, namely: 0x7fc00000 The test functions in test/cygnus use this latter value which agrees, except for sign, with the value produced by the FPU: 0xffc00000 The patch appended to this email as a postscript will change the current value to be consistent with the functions in libm. KB Williams PS diff -c oldstuff/nan_def.c newstuff/nan_def.c *** oldstuff/nan_def.c Sat Oct 25 07:22:54 2003 --- newstuff/nan_def.c Wed Mar 23 15:12:38 2005 *************** *** 1,4 **** /* Copyright (C) 2003 DJ Delorie, see COPYING.DJ for details */ #include ! float_t __dj_nan = { 0x7fffff, 0xff, 0x0 }; --- 1,4 ---- /* Copyright (C) 2003 DJ Delorie, see COPYING.DJ for details */ #include ! float_t __dj_nan = { 0x400000, 0xff, 0x0 }; --part1_1d8.39b4d0cd.2f748f70_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable The value for NAN in src/libc/c99/mat= h/nan_def.c, in 32-bit hex, is:

0x7fffffff

This value is a departure from the long-standing time-honored value used in=20= src/libm/math/sf_nan.c, namely:

0x7fc00000

The test functions in test/cygnus use this latter value which agrees, except= for sign, with the value produced by the FPU:

0xffc00000

The patch appended to this email as a postscript will change the current val= ue to be consistent with the functions in libm.

KB Williams

PS

diff -c oldstuff/nan_def.c newstuff/nan_def.c
*** oldstuff/nan_def.c Sat Oct 25 07:22:54 2003
--- newstuff/nan_def.c Wed Mar 23 15:12:38 2005
***************
*** 1,4 ****
  /* Copyright (C) 2003 DJ Delorie, see COPYING.DJ for details */
  #include <libc/ieee.h>
 
! float_t __dj_nan =3D { 0x7fffff, 0xff, 0x0 };
--- 1,4 ----
  /* Copyright (C) 2003 DJ Delorie, see COPYING.DJ for details */
  #include <libc/ieee.h>
 
! float_t __dj_nan =3D { 0x400000, 0xff, 0x0 };
 --part1_1d8.39b4d0cd.2f748f70_boundary--