|
Last change
on this file since 620 was
444,
checked in by satin@…, 6 years ago
|
|
add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
|
|
File size:
842 bytes
|
| Line | |
|---|
| 1 | /* sf_c_isnan.c -- float version of s_c_isnan.c. |
|---|
| 2 | */ |
|---|
| 3 | |
|---|
| 4 | /* |
|---|
| 5 | * ==================================================== |
|---|
| 6 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
|---|
| 7 | * |
|---|
| 8 | * Developed at SunPro, a Sun Microsystems, Inc. business. |
|---|
| 9 | * Permission to use, copy, modify, and distribute this |
|---|
| 10 | * software is freely granted, provided that this notice |
|---|
| 11 | * is preserved. |
|---|
| 12 | * ==================================================== |
|---|
| 13 | */ |
|---|
| 14 | |
|---|
| 15 | /* |
|---|
| 16 | * isnanf(x) returns 1 is x is nan, else 0; |
|---|
| 17 | * |
|---|
| 18 | * isnanf is an extension declared in <math.h>. |
|---|
| 19 | */ |
|---|
| 20 | |
|---|
| 21 | #include "fdlibm.h" |
|---|
| 22 | #include <ieeefp.h> |
|---|
| 23 | |
|---|
| 24 | #undef isnanf |
|---|
| 25 | |
|---|
| 26 | int |
|---|
| 27 | isnanf (float x) |
|---|
| 28 | { |
|---|
| 29 | __int32_t ix; |
|---|
| 30 | GET_FLOAT_WORD(ix,x); |
|---|
| 31 | ix &= 0x7fffffff; |
|---|
| 32 | return FLT_UWORD_IS_NAN(ix); |
|---|
| 33 | } |
|---|
| 34 | |
|---|
| 35 | #ifdef _DOUBLE_IS_32BITS |
|---|
| 36 | |
|---|
| 37 | #undef isnan |
|---|
| 38 | |
|---|
| 39 | int |
|---|
| 40 | isnan (double x) |
|---|
| 41 | { |
|---|
| 42 | return isnanf((float) x); |
|---|
| 43 | } |
|---|
| 44 | |
|---|
| 45 | #endif /* defined(_DOUBLE_IS_32BITS) */ |
|---|
Note: See
TracBrowser
for help on using the repository browser.
