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

1 files changed, 0 insertions, 88 deletions

diff --git a/libm/float/tanhf.c b/libm/float/tanhf.c
deleted file mode 100644
index 4636192c2..000000000
--- a/libm/float/tanhf.c
+++ /dev/null
@@ -1,88 +0,0 @@
-/*							tanhf.c
- *
- *	Hyperbolic tangent
- *
- *
- *
- * SYNOPSIS:
- *
- * float x, y, tanhf();
- *
- * y = tanhf( x );
- *
- *
- *
- * DESCRIPTION:
- *
- * Returns hyperbolic tangent of argument in the range MINLOG to
- * MAXLOG.
- *
- * A polynomial approximation is used for |x| < 0.625.
- * Otherwise,
- *
- *    tanh(x) = sinh(x)/cosh(x) = 1  -  2/(exp(2x) + 1).
- *
- *
- *
- * ACCURACY:
- *
- *                      Relative error:
- * arithmetic   domain     # trials      peak         rms
- *    IEEE      -2,2        100000      1.3e-7      2.6e-8
- *
- */
-
-/*
-Cephes Math Library Release 2.2:  June, 1992
-Copyright 1984, 1987, 1989, 1992 by Stephen L. Moshier
-Direct inquiries to 30 Frost Street, Cambridge, MA 02140
-*/
-
-/* Single precision hyperbolic tangent
- * test interval: [-0.625, +0.625]
- * trials: 10000
- * peak relative error: 7.2e-8
- * rms relative error: 2.6e-8
- */
-#include <math.h>
-
-extern float MAXLOGF;
-
-float expf( float );
-
-float tanhf( float xx )
-{
-float x, z;
-
-if( xx < 0 )
-	x = -xx;
-else
-	x = xx;
-
-if( x > 0.5 * MAXLOGF )
-	{
-	if( xx > 0 )
-		return( 1.0 );
-	else
-		return( -1.0 );
-	}
-if( x >= 0.625 )
-	{
-	x = expf(x+x);
-	z =  1.0  - 2.0/(x + 1.0);
-	if( xx < 0 )
-		z = -z;
-	}
-else
-	{
-	z = x * x;
-	z =
-	(((( -5.70498872745E-3 * z
-	  + 2.06390887954E-2) * z
-	  - 5.37397155531E-2) * z
-	  + 1.33314422036E-1) * z
-	  - 3.33332819422E-1) * z * xx
-	  + xx;
-	}
-return( z );
-}