2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
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.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * from: Header: fixunsdfsi.s,v 1.3 91/10/08 00:03:15 torek Exp
36 #include <machine/asm.h>
38 #if defined(LIBC_SCCS) && !defined(lint)
39 .asciz "@(#)fixunsdfsi.s 8.1 (Berkeley) 6/4/93"
41 RCSID("$NetBSD: fixunsdfsi.S,v 1.3 2000/07/25 04:26:12 mycroft Exp $")
43 #endif /* LIBC_SCCS and not lint */
44 __FBSDID("$FreeBSD$");
47 * Convert double to unsigned integer (for gcc).
49 * I have made the output for NaN agree with the Sun compiler, not
50 * that it really matters, by using `fbul,a'.
56 .word 0x43e00000 ! .double 2^63
57 .word 0 ! (who me, not trust the assembler?)
60 * Same as above but to unsigned long
63 PIC_PROLOGUE(%o4, %o5)
65 std %f2, [%sp + CCFSZ + SPOFF + 8]
68 fcmped %f0, %f2 ! d < 2^63, or NaN, or -Inf?
69 fbul,a 1f ! if so, use fdtox to convert to long
70 fdtox %f0, %f0 ! (this includes negatives!)
72 ! d does not fit in a long, so subtract 2^63, convert,
73 ! and add 2^63 again (sigh). Just hope the intermediate
74 ! fits (if not, the result is undefined anyway).
76 fsubd %f0, %f2, %f0 ! d -= 2^63
77 fdtox %f0, %f0 ! convert to long
78 std %f0, [%sp + CCFSZ + SPOFF] ! move into return reg
79 ldx [%sp + CCFSZ + SPOFF], %o0
80 sethi %hi(0x80000000), %o1
82 add %o0, %o1, %o0 ! add 2^63
83 ldd [%sp + CCFSZ + SPOFF + 8], %f2
88 std %f0, [%sp + CCFSZ + SPOFF] ! return result
89 ldx [%sp + CCFSZ + SPOFF], %o0
90 ldd [%sp + CCFSZ + SPOFF + 8], %f2