/*-
 * Copyright (c) 1990, 1993
 *	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.
 *
 *	@(#)floor.s	8.1 (Berkeley) 6/4/93
 */

	.text
	.globl	_floor,_ceil,_rint

| floor(x)
| the largest integer no larger than x
_floor:
	fmovel	fpcr,d0		| save old FPCR
	fmoved	sp@(4),fp0	| get argument
	fbun	Lret		| if NaN, return NaN
	fboge	Lrtz		| >=0, round to zero
	fmovel	#0x20,fpcr	| <0, round to -inf
	jra	Ldoit

| ceil(x)
| -floor(-x), for all real x
_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:
	fmoved	fp0,sp@-
	movel	sp@+,d0
	movel	sp@+,d1
	rts

| rint(x)
| delivers integer nearest x in direction of prevailing rounding mode
_rint:
	fintd	sp@(4),fp0	| use prevailing rounding mode
	jra	Lret