| The Android Open Source Project | 1dc9e47 | 2009-03-03 19:28:35 -0800 | [diff] [blame] | 1 | .\" Copyright (c) 2004 David Schultz <das@FreeBSD.org> |
| 2 | .\" All rights reserved. |
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| 5 | .\" modification, are permitted provided that the following conditions |
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| 10 | .\" notice, this list of conditions and the following disclaimer in the |
| 11 | .\" documentation and/or other materials provided with the distribution. |
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| 13 | .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 14 | .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 15 | .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 25 | .\" $FreeBSD: src/lib/msun/man/fdim.3,v 1.1 2004/06/30 07:04:01 das Exp $ |
| 26 | .\" |
| 27 | .Dd June 29, 2004 |
| 28 | .Dt FDIM 3 |
| 29 | .Os |
| 30 | .Sh NAME |
| 31 | .Nm fdim , |
| 32 | .Nm fdimf , |
| 33 | .Nm fdiml |
| 34 | .Nd positive difference functions |
| 35 | .Sh LIBRARY |
| 36 | .Lb libm |
| 37 | .Sh SYNOPSIS |
| 38 | .In math.h |
| 39 | .Ft double |
| 40 | .Fn fdim "double x" "double y" |
| 41 | .Ft float |
| 42 | .Fn fdimf "float x" "float y" |
| 43 | .Ft long double |
| 44 | .Fn fdiml "long double x" "long double y" |
| 45 | .Sh DESCRIPTION |
| 46 | The |
| 47 | .Fn fdim , |
| 48 | .Fn fdimf , |
| 49 | and |
| 50 | .Fn fdiml |
| 51 | functions return the positive difference between |
| 52 | .Fa x |
| 53 | and |
| 54 | .Fa y . |
| 55 | That is, if |
| 56 | .Fa x\- Ns Fa y |
| 57 | is positive, then |
| 58 | .Fa x\- Ns Fa y |
| 59 | is returned. |
| 60 | If either |
| 61 | .Fa x |
| 62 | or |
| 63 | .Fa y |
| 64 | is an \*(Na, then an \*(Na is returned. |
| 65 | Otherwise, the result is |
| 66 | .Li +0.0 . |
| 67 | .Pp |
| 68 | Overflow or underflow may occur iff the exact result is not |
| 69 | representable in the return type. |
| 70 | No other exceptions are raised. |
| 71 | .Sh SEE ALSO |
| 72 | .Xr fabs 3 , |
| 73 | .Xr fmax 3 , |
| 74 | .Xr fmin 3 , |
| 75 | .Xr math 3 |
| 76 | .Sh STANDARDS |
| 77 | The |
| 78 | .Fn fdim , |
| 79 | .Fn fdimf , |
| 80 | and |
| 81 | .Fn fdiml |
| 82 | functions conform to |
| 83 | .St -isoC-99 . |
| 84 | .Sh HISTORY |
| 85 | These routines first appeared in |
| 86 | .Fx 5.3 . |