Last change
on this file since 543 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
|
Rev | Line | |
---|
[444] | 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.