xref: /original-bsd/lib/libc/quad/fixdfdi.c (revision ea3a8ee8)
1 /*-
2  * Copyright (c) 1992 The Regents of the University of California.
3  * All rights reserved.
4  *
5  * This software was developed by the Computer Systems Engineering group
6  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
7  * contributed to Berkeley.
8  *
9  * %sccs.include.redist.c%
10  */
11 
12 #if defined(LIBC_SCCS) && !defined(lint)
13 static char sccsid[] = "@(#)fixdfdi.c	5.4 (Berkeley) 06/25/92";
14 #endif /* LIBC_SCCS and not lint */
15 
16 #include "quad.h"
17 
18 /*
19  * Convert double to (signed) quad.
20  * We clamp anything that is out of range.
21  */
22 quad_t
23 __fixdfdi(x)
24 	double x;
25 {
26 	if (x < 0)
27 		if (x <= QUAD_MIN)
28 			return (QUAD_MIN);
29 		else
30 			return ((quad_t)-(u_quad_t)-x);
31 	else
32 		if (x >= QUAD_MAX)
33 			return (QUAD_MAX);
34 		else
35 			return ((quad_t)(u_quad_t)x);
36 }
37