[src/trunk]: src/lib/libc/quad Don't return 0x1.0p31 for every input value 2^N.

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

details:   https://anonhg.NetBSD.org/src/rev/7579e5ef48c2
branches:  trunk
changeset: 790272:7579e5ef48c2
user:      mlelstv <mlelstv%NetBSD.org@localhost>
date:      Mon Sep 30 19:32:14 2013 +0000

description:
Don't return 0x1.0p31 for every input value 2^N.
There is also no need to special case the value 1.

diffstat:

 lib/libc/quad/floatundidf_ieee754.c |  8 ++------
 1 files changed, 2 insertions(+), 6 deletions(-)

diffs (32 lines):

diff -r c39ffc9282d4 -r 7579e5ef48c2 lib/libc/quad/floatundidf_ieee754.c
--- a/lib/libc/quad/floatundidf_ieee754.c       Mon Sep 30 18:57:59 2013 +0000
+++ b/lib/libc/quad/floatundidf_ieee754.c       Mon Sep 30 19:32:14 2013 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: floatundidf_ieee754.c,v 1.1 2013/08/24 00:51:48 matt Exp $     */
+/*     $NetBSD: floatundidf_ieee754.c,v 1.2 2013/09/30 19:32:14 mlelstv Exp $  */
 
 /*-
  * Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -31,7 +31,7 @@
 
 #include <sys/cdefs.h>
 #if defined(LIBC_SCCS) && !defined(lint)
-__RCSID("$NetBSD: floatundidf_ieee754.c,v 1.1 2013/08/24 00:51:48 matt Exp $");
+__RCSID("$NetBSD: floatundidf_ieee754.c,v 1.2 2013/09/30 19:32:14 mlelstv Exp $");
 #endif /* LIBC_SCCS and not lint */
 
 #if defined(SOFTFLOAT) || defined(__ARM_EABI__)
@@ -52,13 +52,9 @@
 
        if (x == 0)
                return 0.0;
-       if (x == 1)
-               return 1.0;
 
        u_int l = __builtin_clzll(x);
        x <<= (l + 1);  /* clear implicit bit */
-       if (x == 0)
-               return 0x1.0p31;
        x >>= 64 - (DBL_FRACHBITS + DBL_FRACLBITS);
        union uu u = { .uq = x };
        ux.dblu_frach = u.ul[H];