| The Android Open Source Project | 1dc9e47 | 2009-03-03 19:28:35 -0800 | [diff] [blame^] | 1 | .\" Copyright (c) 2004 David Schultz <das@FreeBSD.org> |
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| 13 | .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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| 25 | .\" $FreeBSD: src/lib/msun/man/fegetround.3,v 1.2 2005/01/14 09:12:05 ru Exp $ |
| 26 | .\" |
| 27 | .Dd May 8, 2004 |
| 28 | .Dt FEGETROUND 3 |
| 29 | .Os |
| 30 | .Sh NAME |
| 31 | .Nm fegetround , |
| 32 | .Nm fesetround |
| 33 | .Nd floating-point rounding control |
| 34 | .Sh LIBRARY |
| 35 | .Lb libm |
| 36 | .Sh SYNOPSIS |
| 37 | .In fenv.h |
| 38 | .Fd "#pragma STDC FENV_ACCESS ON" |
| 39 | .Ft int |
| 40 | .Fn fegetround void |
| 41 | .Ft int |
| 42 | .Fn fesetround "int round" |
| 43 | .Sh DESCRIPTION |
| 44 | The |
| 45 | .Fn fegetround |
| 46 | function determines the current floating-point rounding mode, |
| 47 | and the |
| 48 | .Fn fesetround |
| 49 | function sets the current rounding mode to |
| 50 | .Fa round . |
| 51 | The rounding mode is one of |
| 52 | .Dv FE_TONEAREST , FE_DOWNWARD , FE_UPWARD , |
| 53 | or |
| 54 | .Dv FE_TOWARDZERO , |
| 55 | as described in |
| 56 | .Xr fenv 3 . |
| 57 | .Sh RETURN VALUES |
| 58 | The |
| 59 | .Fn fegetround |
| 60 | routine returns the current rounding mode. |
| 61 | The |
| 62 | .Fn fesetround |
| 63 | function returns 0 on success and non-zero otherwise; |
| 64 | however, the present implementation always succeeds. |
| 65 | .Sh SEE ALSO |
| 66 | .Xr fenv 3 , |
| 67 | .Xr fpgetround 3 , |
| 68 | .Xr fpsetround 3 |
| 69 | .Sh STANDARDS |
| 70 | The |
| 71 | .Fn fegetround |
| 72 | and |
| 73 | .Fn fesetround |
| 74 | functions conform to |
| 75 | .St -isoC-99 . |
| 76 | .Sh HISTORY |
| 77 | These routines first appeared in |
| 78 | .Fx 5.3 . |
| 79 | They supersede the non-standard |
| 80 | .Xr fpgetround 3 |
| 81 | and |
| 82 | .Xr fpsetround 3 |
| 83 | functions. |