Last change
on this file since 466 was
444,
checked in by satin@…, 6 years ago
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add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
|
File size:
812 bytes
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Rev | Line | |
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[444] | 1 | |
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| 2 | /* @(#)z_fabsf.c 1.0 98/08/13 */ |
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| 3 | /****************************************************************** |
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| 4 | * Floating-Point Absolute Value |
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| 5 | * |
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| 6 | * Input: |
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| 7 | * x - floating-point number |
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| 8 | * |
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| 9 | * Output: |
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| 10 | * absolute value of x |
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| 11 | * |
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| 12 | * Description: |
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| 13 | * fabs computes the absolute value of a floating point number. |
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| 14 | * |
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| 15 | *****************************************************************/ |
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| 16 | |
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| 17 | #include "fdlibm.h" |
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| 18 | #include "zmath.h" |
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| 19 | |
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| 20 | float |
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| 21 | fabsf (float x) |
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| 22 | { |
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| 23 | switch (numtestf (x)) |
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| 24 | { |
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| 25 | case NAN: |
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| 26 | errno = EDOM; |
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| 27 | return (x); |
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| 28 | case INF: |
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| 29 | errno = ERANGE; |
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| 30 | return (x); |
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| 31 | case 0: |
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| 32 | return (0.0); |
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| 33 | default: |
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| 34 | return (x < 0.0 ? -x : x); |
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| 35 | } |
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| 36 | } |
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| 37 | |
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| 38 | #ifdef _DOUBLE_IS_32BITS |
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| 39 | double fabs (double x) |
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| 40 | { |
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| 41 | return (double) fabsf ((float) x); |
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| 42 | } |
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| 43 | |
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| 44 | #endif /* defined(_DOUBLE_IS_32BITS) */ |
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