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

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

details:   https://anonhg.NetBSD.org/src/rev/4227ccdd4cb7
branches:  trunk
changeset: 786220:4227ccdd4cb7
user:      isaki <isaki%NetBSD.org@localhost>
date:      Sat Apr 20 07:33:05 2013 +0000

description:
Support sinh(-0.0) and tanh(-0.0).

diffstat:

 sys/arch/m68k/fpe/fpu_hyperb.c |  12 ++++++++++--
 1 files changed, 10 insertions(+), 2 deletions(-)

diffs (40 lines):

diff -r 74d6f80a764e -r 4227ccdd4cb7 sys/arch/m68k/fpe/fpu_hyperb.c
--- a/sys/arch/m68k/fpe/fpu_hyperb.c    Sat Apr 20 07:32:45 2013 +0000
+++ b/sys/arch/m68k/fpe/fpu_hyperb.c    Sat Apr 20 07:33:05 2013 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: fpu_hyperb.c,v 1.14 2013/04/20 05:27:05 isaki Exp $    */
+/*     $NetBSD: fpu_hyperb.c,v 1.15 2013/04/20 07:33:05 isaki Exp $    */
 
 /*
  * Copyright (c) 1995  Ken Nakata
@@ -57,7 +57,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: fpu_hyperb.c,v 1.14 2013/04/20 05:27:05 isaki Exp $");
+__KERNEL_RCSID(0, "$NetBSD: fpu_hyperb.c,v 1.15 2013/04/20 07:33:05 isaki Exp $");
 
 #include <machine/ieee.h>
 
@@ -233,6 +233,10 @@
        if (ISINF(&fe->fe_f2))
                return &fe->fe_f2;
 
+       /* if x is +0/-0, return +0/-0 */
+       if (ISZERO(&fe->fe_f2))
+               return &fe->fe_f2;
+
        CPYFPN(&s0, &fe->fe_f2);
        r = __fpu_sinhcosh_taylor(fe, &s0, 2);
 
@@ -250,6 +254,10 @@
        if (ISNAN(&fe->fe_f2))
                return &fe->fe_f2;
 
+       /* if x is +0/-0, return +0/-0 */
+       if (ISZERO(&fe->fe_f2))
+               return &fe->fe_f2;
+
        if (ISINF(&fe->fe_f2)) {
                sign = fe->fe_f2.fp_sign;
                fpu_const(&fe->fe_f2, FPU_CONST_1);