[src/trunk]: src/sys/arch/m68k/fpe Support tan(-0.0).

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

details:   https://anonhg.NetBSD.org/src/rev/0a698a90e732
branches:  trunk
changeset: 786216:0a698a90e732
user:      isaki <isaki%NetBSD.org@localhost>
date:      Sat Apr 20 05:09:41 2013 +0000

description:
Support tan(-0.0).

diffstat:

 sys/arch/m68k/fpe/fpu_trig.c |  8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diffs (29 lines):

diff -r 798a314564d4 -r 0a698a90e732 sys/arch/m68k/fpe/fpu_trig.c
--- a/sys/arch/m68k/fpe/fpu_trig.c      Sat Apr 20 04:55:44 2013 +0000
+++ b/sys/arch/m68k/fpe/fpu_trig.c      Sat Apr 20 05:09:41 2013 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: fpu_trig.c,v 1.12 2013/04/19 13:57:52 isaki Exp $      */
+/*     $NetBSD: fpu_trig.c,v 1.13 2013/04/20 05:09:41 isaki Exp $      */
 
 /*
  * Copyright (c) 1995  Ken Nakata
@@ -57,7 +57,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: fpu_trig.c,v 1.12 2013/04/19 13:57:52 isaki Exp $");
+__KERNEL_RCSID(0, "$NetBSD: fpu_trig.c,v 1.13 2013/04/20 05:09:41 isaki Exp $");
 
 #include "fpu_emulate.h"
 
@@ -409,6 +409,10 @@
        if (ISINF(&fe->fe_f2))
                return fpu_newnan(fe);
 
+       /* if x is +0/-0, return +0/-0 */
+       if (ISZERO(&fe->fe_f2))
+               return &fe->fe_f2;
+
        CPYFPN(&x, &fe->fe_f2);
 
        /* sin(x) */