Last change
on this file since 444 was
444,
checked in by satin@…, 6 years ago
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add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
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File size:
925 bytes
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1 | /* |
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2 | * infinity () returns the representation of infinity. |
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3 | * Added by Cygnus Support. |
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4 | */ |
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5 | |
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6 | /* |
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7 | FUNCTION |
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8 | <<infinity>>, <<infinityf>>---representation of infinity |
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9 | |
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10 | INDEX |
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11 | infinity |
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12 | INDEX |
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13 | infinityf |
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14 | |
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15 | SYNOPSIS |
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16 | #include <math.h> |
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17 | double infinity(void); |
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18 | float infinityf(void); |
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19 | |
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20 | DESCRIPTION |
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21 | <<infinity>> and <<infinityf>> return the special number IEEE |
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22 | infinity in double- and single-precision arithmetic |
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23 | respectively. |
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24 | |
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25 | PORTABILITY |
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26 | <<infinity>> and <<infinityf>> are neither standard C nor POSIX. C and |
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27 | POSIX require macros HUGE_VAL and HUGE_VALF to be defined in math.h, which |
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28 | Newlib defines to be infinities corresponding to these archaic infinity() |
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29 | and infinityf() functions in floating-point implementations which do have |
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30 | infinities. |
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31 | |
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32 | QUICKREF |
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33 | infinity - pure |
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34 | |
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35 | */ |
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36 | |
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37 | #include "fdlibm.h" |
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38 | |
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39 | #ifndef _DOUBLE_IS_32BITS |
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40 | |
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41 | double infinity() |
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42 | { |
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43 | double x; |
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44 | |
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45 | INSERT_WORDS(x,0x7ff00000,0); |
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46 | return x; |
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47 | } |
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48 | |
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49 | #endif /* _DOUBLE_IS_32BITS */ |
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