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add support for __floatunsisf().

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This commit is contained in:
mrg 2011-07-04 11:22:39 +00:00
parent 88fcb00c03
commit de4475a299
3 changed files with 75 additions and 3 deletions
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3
common/lib/libc/quad/quad.h
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@ -1,4 +1,4 @@
/* $NetBSD: quad.h,v 1.2 2011/07/04 06:23:50 matt Exp $ */
/* $NetBSD: quad.h,v 1.3 2011/07/04 11:22:39 mrg Exp $ */
/*-
* Copyright (c) 1992, 1993
@ -123,6 +123,7 @@ u_quad_t __fixunssfdi __P((float));
double __floatdidf __P((quad_t));
float __floatdisf __P((quad_t));
double __floatundidf __P((u_quad_t));
float __floatundisf __P((u_quad_t));
quad_t __iordi3 __P((quad_t, quad_t));
quad_t __lshldi3 __P((quad_t, qshift_t));
quad_t __lshrdi3 __P((quad_t, qshift_t));

4
lib/libc/quad/Makefile.inc
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@ -1,9 +1,9 @@
# $NetBSD: Makefile.inc,v 1.12 2011/07/04 06:23:50 matt Exp $
# $NetBSD: Makefile.inc,v 1.13 2011/07/04 11:22:39 mrg Exp $
# @(#)Makefile.inc 8.1 (Berkeley) 6/4/93
# Quad support
SRCS.quad= cmpdi2.c divdi3.c fixdfdi.c fixsfdi.c fixunsdfdi.c \
fixunssfdi.c floatdidf.c floatdisf.c floatundidf.c \
fixunssfdi.c floatdidf.c floatdisf.c floatundisf.c floatundidf.c \
moddi3.c muldi3.c negdi2.c qdivrem.c \
ucmpdi2.c udivdi3.c umoddi3.c

71
lib/libc/quad/floatundisf.c Normal file
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@ -0,0 +1,71 @@
/* $NetBSD: floatundisf.c,v 1.1 2011/07/04 11:22:39 mrg Exp $ */
/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)floatdisf.c 8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: floatundisf.c,v 1.1 2011/07/04 11:22:39 mrg Exp $");
#endif
#endif /* LIBC_SCCS and not lint */
#include "quad.h"
/*
* Convert (unsigned) quad to float.
*/
float
__floatundisf(u_quad_t x)
{
float f;
union uu u;
u.q = x;
/*
* Now u.ul[H] has the factor of 2^32 (or whatever) and u.ul[L]
* has the units. Ideally we could just set f, add INT_BITS to
* its exponent, and then add the units, but this is portable
* code and does not know how to get at an exponent. Machine-
* specific code may be able to do this more efficiently.
*
* Using double here may be excessive paranoia.
*/
f = (double)u.ul[H] * (((int)1 << (INT_BITS - 2)) * 4.0);
f += u.ul[L];
return f;
}