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| Rev | Author | Line No. | Line |
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| 4349 | Serge | 1 | /* |
| 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 | |||
| 6 | /* |
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| 7 | FUNCTION |
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| 8 | < |
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| 9 | |||
| 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 | |||
| 15 | ANSI_SYNOPSIS |
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| 16 | #include |
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| 17 | double infinity(void); |
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| 18 | float infinityf(void); |
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| 19 | |||
| 20 | DESCRIPTION |
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| 21 | < |
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| 22 | infinity in double- and single-precision arithmetic |
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| 23 | respectively. |
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| 24 | |||
| 25 | PORTABILITY |
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| 26 | < |
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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 | |||
| 32 | QUICKREF |
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| 33 | infinity - pure |
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| 34 | |||
| 35 | */ |
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| 36 | |||
| 37 | #include "fdlibm.h" |
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| 38 | |||
| 39 | #ifndef _DOUBLE_IS_32BITS |
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| 40 | |||
| 41 | double infinity() |
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| 42 | { |
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| 43 | double x; |
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| 44 | |||
| 45 | INSERT_WORDS(x,0x7ff00000,0); |
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| 46 | return x; |
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| 47 | } |
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| 48 | |||
| 49 | #endif /* _DOUBLE_IS_32BITS */ |