NetBSD/lib/libm/arch/m68k/s_ceil.S

68 lines
2.6 KiB
ArmAsm

/* $NetBSD: s_ceil.S,v 1.6 1999/11/10 16:45:33 thorpej Exp $ */
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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 the University of
* California, Berkeley and its contributors.
* 4. 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 <machine/asm.h>
;_sccsid:
;.asciz "from: @(#)floor.s 5.1 (Berkeley) 5/17/90"
RCSID("$NetBSD: s_ceil.S,v 1.6 1999/11/10 16:45:33 thorpej Exp $")
| ceil(x)
| -floor(-x), for all real x
ENTRY(ceil)
fmovel %fpcr,%d0 | save old FPCR
fmoved %sp@(4),%fp0 | get argument
fbun Lret | if NaN, return NaN
fbolt Lrtz | <0, round to zero
fmovel #0x30,%fpcr | >=0, round to inf
jra Ldoit
Lrtz:
fmovel #0x10,%fpcr
Ldoit:
fintd %sp@(4),%fp0 | truncate
fmovel %d0,%fpcr | restore old FPCR
Lret:
#ifndef __SVR4_ABI__
fmoved %fp0,%sp@-
movel %sp@+,%d0
movel %sp@+,%d1
#endif
rts