xref: /freebsd/lib/msun/i387/s_ceil.S (revision 1d386b48a555f61cb7325543adbbb5c3f3407a66)
1/*
2 * Copyright (c) 1993,94 Winning Strategies, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *      This product includes software developed by Winning Strategies, Inc.
16 * 4. The name of the author may not be used to endorse or promote products
17 *    derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31/*
32 * Written by:
33 *	J.T. Conklin (jtc@wimsey.com), Winning Strategies, Inc.
34 */
35
36#include <machine/asm.h>
37ENTRY(ceil)
38	pushl	%ebp
39	movl	%esp,%ebp
40	subl	$8,%esp
41
42	fstcw	-4(%ebp)		/* store fpu control word */
43	movw	-4(%ebp),%dx
44	orw	$0x0800,%dx		/* round towards +oo */
45	andw	$0xfbff,%dx
46	movw	%dx,-8(%ebp)
47	fldcw	-8(%ebp)		/* load modified control word */
48
49	fldl	8(%ebp);		/* round */
50	frndint
51
52	fldcw	-4(%ebp)		/* restore original control word */
53
54	leave
55	ret
56END(ceil)
57
58	.section .note.GNU-stack,"",%progbits
59