1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
/* $OpenBSD: s_copysignf.S,v 1.2 2005/08/02 11:17:31 espie Exp $ */
/*
* Written by J.T. Conklin <jtc@NetBSD.org>.
* Public domain.
*/
#include <machine/asm.h>
/*
* XXXfvdl split this file.
*/
#ifdef __x86_64__
.Lneg:
.long 0x7fffffff
.Lpos:
.long 0x80000000
#endif
ENTRY(copysignf)
#ifdef __i386__
movl 8(%esp),%edx
andl $0x80000000,%edx
movl 4(%esp),%eax
andl $0x7fffffff,%eax
orl %edx,%eax
movl %eax,4(%esp)
flds 4(%esp)
#else
#if 0
/*
* XXXfvdl gas doesn't grok this.
* but it's legal according to the p4 manual.
*/
movss .Lpos(%rip),%xmm2
movss .Lneg(%rip),%xmm3
pandq %xmm2,%xmm1
pandq %xmm3,%xmm0
porq %xmm1,%xmm0
#else
movss %xmm0,-4(%rsp)
movss %xmm1,-8(%rsp)
movl -8(%rsp),%edx
andl $0x80000000,%edx
movl -4(%rsp),%eax
andl $0x7fffffff,%eax
orl %edx,%eax
movl %eax,-4(%rsp)
movss -4(%rsp),%xmm0
#endif
#endif
ret
|
