[src/trunk]: src/sys/arch/powerpc/fpu IEEE 754 and Power ISA require sqrt(+0)...

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

details:   https://anonhg.NetBSD.org/src/rev/f5284c55a9c0
branches:  trunk
changeset: 369891:f5284c55a9c0
user:      rin <rin%NetBSD.org@localhost>
date:      Tue Sep 06 23:00:43 2022 +0000

description:
IEEE 754 and Power ISA require sqrt(+0) = +0 and sqrt(-0) = -0, not Inf.

diffstat:

 sys/arch/powerpc/fpu/fpu_sqrt.c |  6 ++----
 1 files changed, 2 insertions(+), 4 deletions(-)

diffs (27 lines):

diff -r 57ad566f9588 -r f5284c55a9c0 sys/arch/powerpc/fpu/fpu_sqrt.c
--- a/sys/arch/powerpc/fpu/fpu_sqrt.c   Tue Sep 06 22:54:41 2022 +0000
+++ b/sys/arch/powerpc/fpu/fpu_sqrt.c   Tue Sep 06 23:00:43 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: fpu_sqrt.c,v 1.11 2022/09/01 06:10:58 rin Exp $ */
+/*     $NetBSD: fpu_sqrt.c,v 1.12 2022/09/06 23:00:43 rin Exp $ */
 
 /*
  * Copyright (c) 1992, 1993
@@ -45,7 +45,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: fpu_sqrt.c,v 1.11 2022/09/01 06:10:58 rin Exp $");
+__KERNEL_RCSID(0, "$NetBSD: fpu_sqrt.c,v 1.12 2022/09/06 23:00:43 rin Exp $");
 
 #include <sys/types.h>
 #if defined(DIAGNOSTIC)||defined(DEBUG)
@@ -221,8 +221,6 @@
                return (x);
        }
        if (ISZERO(x)) {
-               fe->fe_cx |= FPSCR_ZX;
-               x->fp_class = FPC_INF;
                DUMPFPN(FPE_REG, x);
                return (x);
        }