Module Name: src
Committed By: mlelstv
Date: Mon Sep 30 19:32:14 UTC 2013
Modified Files:
src/lib/libc/quad: floatundidf_ieee754.c
Log Message:
Don't return 0x1.0p31 for every input value 2^N.
There is also no need to special case the value 1.
To generate a diff of this commit:
cvs rdiff -u -r1.1 -r1.2 src/lib/libc/quad/floatundidf_ieee754.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/lib/libc/quad/floatundidf_ieee754.c
diff -u src/lib/libc/quad/floatundidf_ieee754.c:1.1 src/lib/libc/quad/floatundidf_ieee754.c:1.2
--- src/lib/libc/quad/floatundidf_ieee754.c:1.1 Sat Aug 24 00:51:48 2013
+++ src/lib/libc/quad/floatundidf_ieee754.c Mon Sep 30 19:32:14 2013
@@ -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 @@ __floatundidf(u_quad_t x)
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];
