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81a7c8c37f
makedoc defines a command as 'all upper case, and alone on a line'. A few QUICKREF lines currently violate this by having some additional text after the QUICKREF. So, currently, these lines are treated as an unknown command. This is benign as QUICKREF currently does nothing but produce some ignored output on stderr. I'm not sure what the intent of QUICKREF is. 2015-11-06 Jon Turney <jon.turney@dronecode.org.uk> * libm/mathfp/s_acos.c: Fix QUICKREF. * libm/mathfp/e_acosh.c: Ditto. * libm/math/w_asin.c: Ditto. * libm/mathfp/e_acosh.c: Ditto. * libm/mathfp/s_acos.c: Ditto. Signed-off-by: Jon Turney <jon.turney@dronecode.org.uk>
95 lines
1.8 KiB
C
95 lines
1.8 KiB
C
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/* @(#)z_acos.c 1.0 98/08/13 */
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/*
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FUNCTION
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<<acos>>, <<acosf>>---arc cosine
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INDEX
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acos
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INDEX
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acosf
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ANSI_SYNOPSIS
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#include <math.h>
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double acos(double <[x]>);
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float acosf(float <[x]>);
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TRAD_SYNOPSIS
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#include <math.h>
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double acos(<[x]>)
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double <[x]>;
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float acosf(<[x]>)
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float <[x]>;
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DESCRIPTION
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<<acos>> computes the inverse cosine (arc cosine) of the input value.
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Arguments to <<acos>> must be in the range @minus{}1 to 1.
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<<acosf>> is identical to <<acos>>, except that it performs
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its calculations on <<floats>>.
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RETURNS
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@ifnottex
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<<acos>> and <<acosf>> return values in radians, in the range of 0 to pi
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.
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@end ifnottex
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@tex
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<<acos>> and <<acosf>> return values in radians, in the range of <<0>> t
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o $\pi$.
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@end tex
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If <[x]> is not between @minus{}1 and 1, the returned value is NaN
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(not a number) the global variable <<errno>> is set to <<EDOM>>, and a
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<<DOMAIN error>> message is sent as standard error output.
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You can modify error handling for these functions using <<matherr>>.
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QUICKREF
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ansi svid posix rentrant
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acos y,y,y,m
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acosf n,n,n,m
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MATHREF
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acos, [-1,1], acos(arg),,,
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acos, NAN, arg,DOMAIN,EDOM
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MATHREF
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acosf, [-1,1], acosf(arg),,,
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acosf, NAN, argf,DOMAIN,EDOM
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*/
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/*****************************************************************
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* Arccosine
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*
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* Input:
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* x - floating point value
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*
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* Output:
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* arccosine of x
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*
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* Description:
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* This routine returns the arccosine of x.
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*
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*****************************************************************/
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#include "fdlibm.h"
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#include "zmath.h"
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#ifndef _DOUBLE_IS_32BITS
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double
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_DEFUN (acos, (double),
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double x)
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{
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return (asine (x, 1));
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}
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#endif /* _DOUBLE_IS_32BITS */
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