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
53
|
/* $OpenBSD: fpsetsticky.S,v 1.4 2018/07/03 23:14:05 mortimer Exp $ */
/* $NetBSD: fpsetsticky.S,v 1.5 2004/03/09 17:16:13 drochner Exp $ */
/*
* Written by Frank van der Linden at Wasabi Systems for NetBSD
* Public domain.
*/
#include <machine/asm.h>
/*
* XXX set both the x87 status word and the SSE mxcsr register.
* Applications should only set exception and round flags
* via the fp*() interface, otherwise the status words
* will get our of sync.
*/
#ifdef WEAK_ALIAS
WEAK_ALIAS(fpsetsticky, _fpsetsticky)
ENTRY(_fpsetsticky)
#else
ENTRY(fpsetsticky)
#endif
RETGUARD_SETUP(fpsetsticky, r11)
fnstenv -28(%rsp)
stmxcsr -32(%rsp)
andl $63,%edi
movl -24(%rsp),%eax
movl %eax,%edx
andb $0xc0,%dl
orl %edi,%edx
movl %edx,-24(%rsp)
movl -32(%rsp),%edx
orl %edx,%eax
andl $63,%eax
andb $0xc0,%dl
orl %edi,%edx
movl %edx,-32(%rsp)
ldmxcsr -32(%rsp)
fldenv -28(%rsp)
RETGUARD_CHECK(fpsetsticky, r11)
ret
#ifdef WEAK_ALIAS
END(_fpsetsticky)
#else
END(fpsetsticky)
#endif
|
