[src/trunk]: src/sys/arch/m68k/fpe Fix sign of zero in case of x > -(2^18).

[isaki <isaki%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/61fd127ac37b
branches:  trunk
changeset: 349336:61fd127ac37b
user:      isaki <isaki%NetBSD.org@localhost>
date:      Wed Dec 07 11:27:18 2016 +0000

description:
Fix sign of zero in case of x > -(2^18).
# By the way, I will modify this case later.

diffstat:

 sys/arch/m68k/fpe/fpu_exp.c |  10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)

diffs (33 lines):

diff -r 6c8a0c0575a6 -r 61fd127ac37b sys/arch/m68k/fpe/fpu_exp.c
--- a/sys/arch/m68k/fpe/fpu_exp.c       Wed Dec 07 10:03:29 2016 +0000
+++ b/sys/arch/m68k/fpe/fpu_exp.c       Wed Dec 07 11:27:18 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: fpu_exp.c,v 1.9 2016/12/05 15:31:01 isaki Exp $        */
+/*     $NetBSD: fpu_exp.c,v 1.10 2016/12/07 11:27:18 isaki Exp $       */
 
 /*
  * Copyright (c) 1995  Ken Nakata
@@ -32,7 +32,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: fpu_exp.c,v 1.9 2016/12/05 15:31:01 isaki Exp $");
+__KERNEL_RCSID(0, "$NetBSD: fpu_exp.c,v 1.10 2016/12/07 11:27:18 isaki Exp $");
 
 #include <machine/ieee.h>
 
@@ -136,10 +136,12 @@
        /* extract k as integer format from fpn format */
        j = FP_LG - fp->fp_exp;
        if (j < 0) {
-               if (fp->fp_sign)
+               if (fp->fp_sign) {
                        fp->fp_class = FPC_ZERO;                /* k < -2^18 */
-               else
+                       fp->fp_sign = 0;
+               } else {
                        fp->fp_class = FPC_INF;                 /* k >  2^18 */
+               }
                return fp;
        }
        k = fp->fp_mant[0] >> j;