|
Last change
on this file was 469, checked in by alain, 8 years ago |
|
1) Introduce the libsemaphore library.
2) Introduce a small libmath library, required by the "fft" application..
3) Introduce the multithreaded "fft" application.
4) Fix a bad synchronisation bug in the Copy-On-Write mechanism.
|
|
File size:
753 bytes
|
| Line | |
|---|
| 1 | /*
|
|---|
| 2 | * ====================================================
|
|---|
| 3 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
|
|---|
| 4 | *
|
|---|
| 5 | * Developed at SunPro, a Sun Microsystems, Inc. business.
|
|---|
| 6 | * Permission to use, copy, modify, and distribute this
|
|---|
| 7 | * software is freely granted, provided that this notice
|
|---|
| 8 | * is preserved.
|
|---|
| 9 | * ====================================================
|
|---|
| 10 | */
|
|---|
| 11 |
|
|---|
| 12 | /*
|
|---|
| 13 | * Modified for ALMOS-MKH OS at UPMC, France, August 2018. (Alain Greiner)
|
|---|
| 14 | */
|
|---|
| 15 |
|
|---|
| 16 |
|
|---|
| 17 | /*
|
|---|
| 18 | * isnan(x) returns 1 is x is nan, else 0;
|
|---|
| 19 | * no branching!
|
|---|
| 20 | */
|
|---|
| 21 |
|
|---|
| 22 | #include "math.h"
|
|---|
| 23 | #include "math_private.h"
|
|---|
| 24 |
|
|---|
| 25 | int isnan(double x)
|
|---|
| 26 | {
|
|---|
| 27 | int32_t hx,lx;
|
|---|
| 28 | EXTRACT_WORDS(hx,lx,x);
|
|---|
| 29 | hx &= 0x7fffffff;
|
|---|
| 30 | hx |= (uint32_t)(lx|(-lx))>>31;
|
|---|
| 31 | hx = 0x7ff00000 - hx;
|
|---|
| 32 | return (int)(((uint32_t)hx)>>31);
|
|---|
| 33 | }
|
|---|
Note:
See
TracBrowser
for help on using the repository browser.
