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, 128 deletions

diff --git a/libm/float/logf.c b/libm/float/logf.c
deleted file mode 100644
index 750138564..000000000
--- a/libm/float/logf.c
+++ /dev/null
@@ -1,128 +0,0 @@
-/*							logf.c
- *
- *	Natural logarithm
- *
- *
- *
- * SYNOPSIS:
- *
- * float x, y, logf();
- *
- * y = logf( x );
- *
- *
- *
- * DESCRIPTION:
- *
- * Returns the base e (2.718...) logarithm of x.
- *
- * The argument is separated into its exponent and fractional
- * parts.  If the exponent is between -1 and +1, the logarithm
- * of the fraction is approximated by
- *
- *     log(1+x) = x - 0.5 x**2 + x**3 P(x)
- *
- *
- *
- * ACCURACY:
- *
- *                      Relative error:
- * arithmetic   domain     # trials      peak         rms
- *    IEEE      0.5, 2.0    100000       7.6e-8     2.7e-8
- *    IEEE      1, MAXNUMF  100000                  2.6e-8
- *
- * In the tests over the interval [1, MAXNUM], the logarithms
- * of the random arguments were uniformly distributed over
- * [0, MAXLOGF].
- *
- * ERROR MESSAGES:
- *
- * logf singularity:  x = 0; returns MINLOG
- * logf domain:       x < 0; returns MINLOG
- */
-
-/*
-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 natural logarithm
- * test interval: [sqrt(2)/2, sqrt(2)]
- * trials: 10000
- * peak relative error: 7.1e-8
- * rms relative error: 2.7e-8
- */
-
-#include <math.h>
-extern float MINLOGF, SQRTHF;
-
-
-float frexpf( float, int * );
-
-float logf( float xx )
-{
-register float y;
-float x, z, fe;
-int e;
-
-x = xx;
-fe = 0.0;
-/* Test for domain */
-if( x <= 0.0 )
-	{
-	if( x == 0.0 )
-		mtherr( "logf", SING );
-	else
-		mtherr( "logf", DOMAIN );
-	return( MINLOGF );
-	}
-
-x = frexpf( x, &e );
-if( x < SQRTHF )
-	{
-	e -= 1;
-	x = x + x - 1.0; /*  2x - 1  */
-	}	
-else
-	{
-	x = x - 1.0;
-	}
-z = x * x;
-/* 3.4e-9 */
-/*
-p = logfcof;
-y = *p++ * x;
-for( i=0; i<8; i++ )
-	{
-	y += *p++;
-	y *= x;
-	}
-y *= z;
-*/
-
-y =
-(((((((( 7.0376836292E-2 * x
-- 1.1514610310E-1) * x
-+ 1.1676998740E-1) * x
-- 1.2420140846E-1) * x
-+ 1.4249322787E-1) * x
-- 1.6668057665E-1) * x
-+ 2.0000714765E-1) * x
-- 2.4999993993E-1) * x
-+ 3.3333331174E-1) * x * z;
-
-if( e )
-	{
-	fe = e;
-	y += -2.12194440e-4 * fe;
-	}
-
-y +=  -0.5 * z;  /* y - 0.5 x^2 */
-z = x + y;   /* ... + x  */
-
-if( e )
-	z += 0.693359375 * fe;
-
-return( z );
-}