e415d48872
Bumping libc files for unsupported architectures, to simplify merging. A bunch of small fixes: * in libutil update * the macro in endian.h * some undefined types due to clear separation from host. * Fix a warning for cdbr.c Some modification which were required for the new build system: * inclusion path for const.h in sconst, still hacky * Removed default malloc.c which conflicts on some occasions.
66 lines
2.3 KiB
C
66 lines
2.3 KiB
C
/* $NetBSD: flt_rounds.c,v 1.11 2011/07/10 21:18:47 matt Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1996 Mark Brinicombe
|
|
* All rights reserved.
|
|
*
|
|
* 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Mark Brinicombe
|
|
* for the NetBSD Project.
|
|
* 4. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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)
|
|
__RCSID("$NetBSD: flt_rounds.c,v 1.11 2011/07/10 21:18:47 matt Exp $");
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
#include <ieeefp.h>
|
|
#include <float.h>
|
|
#include <stdint.h>
|
|
#include <powerpc/fpu.h>
|
|
|
|
static const int map[] = {
|
|
1, /* round to nearest */
|
|
0, /* round to zero */
|
|
2, /* round to positive infinity */
|
|
3 /* round to negative infinity */
|
|
};
|
|
|
|
int
|
|
__flt_rounds(void)
|
|
{
|
|
#ifdef _SOFT_FLOAT
|
|
return map[fpgetround()];
|
|
#else
|
|
union {
|
|
double u_d;
|
|
uint64_t u_fpscr;
|
|
} ud;
|
|
|
|
__asm volatile("mffs %0" : "=f"(ud.u_d));
|
|
return map[((uint32_t)ud.u_fpscr & FPSCR_RN)];
|
|
#endif
|
|
}
|