xref: /netbsd-src/lib/libc/arch/vax/gen/modf.S (revision 787e823fd1325737172861d30c613c7e6e7d2f3d)
1ce0bb6e8Sragge/*
2ce0bb6e8Sragge * Copyright (c) 1983, 1993
3ce0bb6e8Sragge *	The Regents of the University of California.  All rights reserved.
4ce0bb6e8Sragge *
5ce0bb6e8Sragge * Redistribution and use in source and binary forms, with or without
6ce0bb6e8Sragge * modification, are permitted provided that the following conditions
7ce0bb6e8Sragge * are met:
8ce0bb6e8Sragge * 1. Redistributions of source code must retain the above copyright
9ce0bb6e8Sragge *    notice, this list of conditions and the following disclaimer.
10ce0bb6e8Sragge * 2. Redistributions in binary form must reproduce the above copyright
11ce0bb6e8Sragge *    notice, this list of conditions and the following disclaimer in the
12ce0bb6e8Sragge *    documentation and/or other materials provided with the distribution.
13eb7c1594Sagc * 3. Neither the name of the University nor the names of its contributors
14ce0bb6e8Sragge *    may be used to endorse or promote products derived from this software
15ce0bb6e8Sragge *    without specific prior written permission.
16ce0bb6e8Sragge *
17ce0bb6e8Sragge * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18ce0bb6e8Sragge * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19ce0bb6e8Sragge * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20ce0bb6e8Sragge * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21ce0bb6e8Sragge * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22ce0bb6e8Sragge * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23ce0bb6e8Sragge * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24ce0bb6e8Sragge * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25ce0bb6e8Sragge * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26ce0bb6e8Sragge * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27ce0bb6e8Sragge * SUCH DAMAGE.
28ce0bb6e8Sragge */
29ce0bb6e8Sragge
30*787e823fSmatt#include "DEFS.h"
31*787e823fSmatt
32ce0bb6e8Sragge#if defined(LIBC_SCCS) && !defined(lint)
33ce0bb6e8Sragge	/* .asciz "@(#)modf.s	8.1 (Berkeley) 6/4/93" */
34*787e823fSmattRCSID("$NetBSD: modf.S,v 1.5 2011/01/25 02:38:15 matt Exp $")
35ce0bb6e8Sragge#endif /* LIBC_SCCS and not lint */
36ce0bb6e8Sragge
37ce0bb6e8Sragge/*
38ce0bb6e8Sragge * double modf (value, iptr)
39ce0bb6e8Sragge * double value, *iptr;
40ce0bb6e8Sragge *
41ce0bb6e8Sragge * Modf returns the fractional part of "value",
42ce0bb6e8Sragge * and stores the integer part indirectly through "iptr".
43ce0bb6e8Sragge */
44ce0bb6e8Sragge
45ce0bb6e8SraggeENTRY(modf, 0)
460ce5ca14Smatt	emodd	4(%ap),$0,$0f1.0,%r2,%r0
47ce0bb6e8Sragge	jvs	1f			# integer overflow
480ce5ca14Smatt	cvtld	%r2,*12(%ap)
49ce0bb6e8Sragge	ret
50ce0bb6e8Sragge1:
510ce5ca14Smatt	subd3	%r0,4(%ap),*12(%ap)
52ce0bb6e8Sragge	ret
53*787e823fSmattEND(modf)
54471cb493Smatt
55471cb493SmattENTRY(modff, 0)
56471cb493Smatt	emodf	4(%ap),$0,$0f1.0,%r2,%r0
57471cb493Smatt	jvs	1f			# integer overflow
58471cb493Smatt	cvtlf	%r2,*8(%ap)
59471cb493Smatt	ret
60471cb493Smatt1:
61471cb493Smatt	subf3	%r0,4(%ap),*8(%ap)
62471cb493Smatt	ret
63*787e823fSmattEND(modff)
64