|
Last change
on this file since 628 was
469,
checked in by alain, 6 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:
811 bytes
|
| Rev | Line | |
|---|
| [469] | 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 | * finite(x) returns 1 is x is finite, else 0; |
|---|
| 18 | * no branching! |
|---|
| 19 | */ |
|---|
| 20 | |
|---|
| 21 | #include "math.h" |
|---|
| 22 | #include "math_private.h" |
|---|
| 23 | |
|---|
| 24 | int isfinite(double x) |
|---|
| 25 | { |
|---|
| 26 | uint32_t hx; |
|---|
| 27 | |
|---|
| 28 | GET_HIGH_WORD(hx, x); |
|---|
| 29 | /* Finite numbers have at least one zero bit in exponent. */ |
|---|
| 30 | /* All other numbers will result in 0xffffffff after OR: */ |
|---|
| 31 | return (hx | 0x800fffff) != 0xffffffff; |
|---|
| 32 | } |
|---|
| 33 | |
|---|
Note: See
TracBrowser
for help on using the repository browser.
