NetBSD/lib/csu/alpha/crtfm.c

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/* $NetBSD: crtfm.c,v 1.2 2002/01/14 01:31:00 thorpej Exp $ */
/*
* Copyright (c) 2002 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* 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 for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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.
*/
/*
* Support for the GCC "-ffast-math" option on the Alpha.
*/
#include <sys/types.h>
#include <machine/fpu.h>
#include <machine/sysarch.h>
/*
* Must provide this wrapper around sysarch(2) so that statically-linked
* programs work properly.
*/
extern void __alpha_sysarch(int, void *);
__asm(".ent __alpha_sysarch 0 ;\n"
"__alpha_sysarch: ;\n"
" ldiq $0, 165 ;\n" /* v0 = SYS_sysarch */
" call_pal 0x0083 ;\n" /* PAL_OSF1_callsys */
" ret $31,($26),1 ;\n"
".end __alpha_sysarch");
static void __attribute__((__constructor__))
__alpha_set_fast_math(void)
{
struct alpha_fp_c_args args;
args.fp_c = IEEE_MAP_DMZ|IEEE_MAP_UMZ;
__alpha_sysarch(ALPHA_SET_FP_C, &args);
}