libm: Add .section .note.GNU-stack to all assembly files
[dragonfly.git] / lib / libm / arch / i386 / s_modf.S
CommitLineData
74dfd0cf
JM
1/* $NetBSD: s_modf.S,v 1.1 2006/03/22 20:45:58 drochner Exp $ */
2
3/*-
4 * Copyright (c) 1990 The Regents of the University of California.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Sean Eric Fagan.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * from: @(#)modf.s 5.5 (Berkeley) 3/18/91
35 */
36
37#include <machine/asm.h>
38
39/*
40 * modf(value, iptr): return fractional part of value, and stores the
41 * integral part into iptr (a pointer to double).
42 *
43 * Written by Sean Eric Fagan (sef@kithrup.COM)
44 * Sun Mar 11 20:27:30 PST 1990
45 */
46
47/* With CHOP mode on, frndint behaves as TRUNC does. Useful. */
48ENTRY(modf)
49#ifdef __x86_64__
50 pushq %rbp
51 movq %rsp,%rbp
52 subq $24,%rsp
53
54 /* Set chop mode. */
55 fnstcw -12(%rbp)
56 movw -12(%rbp),%dx
57 orw $3072,%dx
58 movw %dx,-16(%rbp)
59 fldcw -16(%rbp)
60
61 /* Get integral part. */
62 movsd %xmm0,-24(%rbp)
63 fldl -24(%rbp)
64 frndint
65 fstpl -8(%rbp)
66
67 /* Restore control word. */
68 fldcw -12(%rbp)
69
70 /* Store integral part. */
71 movsd -8(%rbp),%xmm0
72 movsd %xmm0,(%rdi)
73
74 /* Get fractional part and return it. */
75 fldl -24(%rbp)
76 fsubl -8(%rbp)
77 fstpl -24(%rbp)
78 movsd -24(%rbp),%xmm0
79#else
80 pushl %ebp
81 movl %esp,%ebp
82 subl $16,%esp
83 fnstcw -12(%ebp)
84 movw -12(%ebp),%dx
85 orw $3072,%dx
86 movw %dx,-16(%ebp)
87 fldcw -16(%ebp)
88 fldl 8(%ebp)
89 frndint
90 fstpl -8(%ebp)
91 fldcw -12(%ebp)
92 movl 16(%ebp),%eax
93 movl -8(%ebp),%edx
94 movl -4(%ebp),%ecx
95 movl %edx,(%eax)
96 movl %ecx,4(%eax)
97 fldl 8(%ebp)
98 fsubl -8(%ebp)
99 jmp L1
100L1:
101#endif
102 leave
103 ret
104END(modf)
70e34eb2
JM
105
106 .section .note.GNU-stack,"",%progbits