Fix multiple problems in the powerpcspe floating point code. * Endianness handling of the SPEFSCR in fenv.h was completely broken. * Ensure SPEFSCR synchronization requirements are being met. The __r.__d -> __r transformations were written by jhibbits. Reviewed by: jhibbits Differential Revision: https://reviews.freebsd.org/D22526
54 lines
2.0 KiB
C
54 lines
2.0 KiB
C
/* $NetBSD: fpsetmask.c,v 1.3 2002/01/13 21:45:48 thorpej Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 2016 Justin Hibbits
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Dan Winship.
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/types.h>
|
|
#include <machine/spr.h>
|
|
#include <ieeefp.h>
|
|
|
|
#ifndef _SOFT_FLOAT
|
|
fp_except_t
|
|
fpsetmask(fp_except_t mask)
|
|
{
|
|
uint32_t fpscr;
|
|
fp_rnd_t old;
|
|
|
|
__asm__ __volatile("mfspr %0, %1" : "=r"(fpscr) : "K"(SPR_SPEFSCR));
|
|
old = (fp_rnd_t)((fpscr >> 2) & 0x1f);
|
|
fpscr = (fpscr & 0xffffff83) | (mask << 2);
|
|
__asm__ __volatile("mtspr %1,%0;isync" :: "r"(fpscr), "K"(SPR_SPEFSCR));
|
|
return (old);
|
|
}
|
|
#endif
|