Last change
on this file since 577 was
444,
checked in by satin@…, 6 years ago
|
add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
|
File size:
1.6 KB
|
Line | |
---|
1 | /* wf_sqrt.c -- float version of w_sqrt.c. |
---|
2 | * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. |
---|
3 | */ |
---|
4 | |
---|
5 | /* |
---|
6 | * ==================================================== |
---|
7 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
---|
8 | * |
---|
9 | * Developed at SunPro, a Sun Microsystems, Inc. business. |
---|
10 | * Permission to use, copy, modify, and distribute this |
---|
11 | * software is freely granted, provided that this notice |
---|
12 | * is preserved. |
---|
13 | * ==================================================== |
---|
14 | */ |
---|
15 | |
---|
16 | /* |
---|
17 | * wrapper sqrtf(x) |
---|
18 | */ |
---|
19 | |
---|
20 | #include "fdlibm.h" |
---|
21 | #include <errno.h> |
---|
22 | |
---|
23 | #ifdef __STDC__ |
---|
24 | float sqrtf(float x) /* wrapper sqrtf */ |
---|
25 | #else |
---|
26 | float sqrtf(x) /* wrapper sqrtf */ |
---|
27 | float x; |
---|
28 | #endif |
---|
29 | { |
---|
30 | #ifdef _IEEE_LIBM |
---|
31 | return __ieee754_sqrtf(x); |
---|
32 | #else |
---|
33 | float z; |
---|
34 | struct exception exc; |
---|
35 | z = __ieee754_sqrtf(x); |
---|
36 | if(_LIB_VERSION == _IEEE_ || isnan(x)) return z; |
---|
37 | if(x<(float)0.0) { |
---|
38 | /* sqrtf(negative) */ |
---|
39 | exc.type = DOMAIN; |
---|
40 | exc.name = "sqrtf"; |
---|
41 | exc.err = 0; |
---|
42 | exc.arg1 = exc.arg2 = (double)x; |
---|
43 | if (_LIB_VERSION == _SVID_) |
---|
44 | exc.retval = 0.0; |
---|
45 | else |
---|
46 | exc.retval = 0.0/0.0; |
---|
47 | if (_LIB_VERSION == _POSIX_) |
---|
48 | errno = EDOM; |
---|
49 | else if (!matherr(&exc)) { |
---|
50 | errno = EDOM; |
---|
51 | } |
---|
52 | if (exc.err != 0) |
---|
53 | errno = exc.err; |
---|
54 | return (float)exc.retval; |
---|
55 | } else |
---|
56 | return z; |
---|
57 | #endif |
---|
58 | } |
---|
59 | |
---|
60 | #ifdef _DOUBLE_IS_32BITS |
---|
61 | |
---|
62 | #ifdef __STDC__ |
---|
63 | double sqrt(double x) |
---|
64 | #else |
---|
65 | double sqrt(x) |
---|
66 | double x; |
---|
67 | #endif |
---|
68 | { |
---|
69 | return (double) sqrtf((float) x); |
---|
70 | } |
---|
71 | |
---|
72 | #endif /* defined(_DOUBLE_IS_32BITS) */ |
---|
Note: See
TracBrowser
for help on using the repository browser.