blob: 1e7f2e1c5f844b111445903bef62243b967ec9c7 (
plain)
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
54
55
56
57
58
59
60
61
62
63
64
65
66
|
/*
* Written by J.T. Conklin <jtc@netbsd.org>.
* Public domain.
*/
#include <machine/asm.h>
RCSID("$NetBSD: s_log1pf.S,v 1.4 1995/05/09 00:13:05 jtc Exp $")
.section .rodata
.align ALIGNARG(4)
/* The fyl2xp1 can only be used for values in
-1 + sqrt(2) / 2 <= x <= 1 - sqrt(2) / 2
0.29 is a safe value.
*/
limit: .float 0.29
one: .float 1.0
/*
* Use the fyl2xp1 function when the argument is in the range -0.29 to 0.29,
* otherwise fyl2x with the needed extra computation.
*/
.text
ENTRY(__log1pf)
fldln2
flds 4(%esp)
#ifdef PIC
LOAD_PIC_REG (dx)
#endif
fxam
fnstsw
fld %st
sahf
jc 3f // in case x is NaN or ħInf
4: fabs
#ifdef PIC
fcomps limit@GOTOFF(%edx)
#else
fcomps limit
#endif
fnstsw
sahf
jc 2f
#ifdef PIC
fadds one@GOTOFF(%edx)
#else
fadds one
#endif
fyl2x
ret
2: fyl2xp1
ret
3: jp 4b // in case x is ħInf
fstp %st(1)
fstp %st(1)
ret
END (__log1pf)
weak_alias (__log1pf, log1pf)
|
