From 7ce331c01ce6eb7b3f5c715a38a24359da9c6ee2 Mon Sep 17 00:00:00 2001 From: Eric Andersen Date: Thu, 22 Nov 2001 14:04:29 +0000 Subject: Totally rework the math library, this time based on the MacOs X math library (which is itself based on the math lib from FreeBSD). -Erik --- libm/float/asinhf.c | 88 ----------------------------------------------------- 1 file changed, 88 deletions(-) delete mode 100644 libm/float/asinhf.c (limited to 'libm/float/asinhf.c') diff --git a/libm/float/asinhf.c b/libm/float/asinhf.c deleted file mode 100644 index d3fbe10a7..000000000 --- a/libm/float/asinhf.c +++ /dev/null @@ -1,88 +0,0 @@ -/* asinhf.c - * - * Inverse hyperbolic sine - * - * - * - * SYNOPSIS: - * - * float x, y, asinhf(); - * - * y = asinhf( x ); - * - * - * - * DESCRIPTION: - * - * Returns inverse hyperbolic sine of argument. - * - * If |x| < 0.5, the function is approximated by a rational - * form x + x**3 P(x)/Q(x). Otherwise, - * - * asinh(x) = log( x + sqrt(1 + x*x) ). - * - * - * - * ACCURACY: - * - * Relative error: - * arithmetic domain # trials peak rms - * IEEE -3,3 100000 2.4e-7 4.1e-8 - * - */ - -/* asinh.c */ - -/* -Cephes Math Library Release 2.2: June, 1992 -Copyright 1984, 1987, 1988, 1992 by Stephen L. Moshier -Direct inquiries to 30 Frost Street, Cambridge, MA 02140 -*/ - -/* Single precision inverse hyperbolic sine - * test interval: [-0.5, +0.5] - * trials: 10000 - * peak relative error: 8.8e-8 - * rms relative error: 3.2e-8 - */ -#include -extern float LOGE2F; - -float logf( float ); -float sqrtf( float ); - -float asinhf( float xx ) -{ -float x, z; - -if( xx < 0 ) - x = -xx; -else - x = xx; - -if( x > 1500.0 ) - { - z = logf(x) + LOGE2F; - goto done; - } -z = x * x; -if( x < 0.5 ) - { - z = - ((( 2.0122003309E-2 * z - - 4.2699340972E-2) * z - + 7.4847586088E-2) * z - - 1.6666288134E-1) * z * x - + x; - } -else - { - z = sqrtf( z + 1.0 ); - z = logf( x + z ); - } -done: -if( xx < 0 ) - z = -z; -return( z ); -} - -- cgit v1.2.3