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, 143 deletions

diff --git a/libm/ldouble/cbrtl.c b/libm/ldouble/cbrtl.c
deleted file mode 100644
index 89ed11a06..000000000
--- a/libm/ldouble/cbrtl.c
+++ /dev/null
@@ -1,143 +0,0 @@
-/*							cbrtl.c
- *
- *	Cube root, long double precision
- *
- *
- *
- * SYNOPSIS:
- *
- * long double x, y, cbrtl();
- *
- * y = cbrtl( x );
- *
- *
- *
- * DESCRIPTION:
- *
- * Returns the cube root of the argument, which may be negative.
- *
- * Range reduction involves determining the power of 2 of
- * the argument.  A polynomial of degree 2 applied to the
- * mantissa, and multiplication by the cube root of 1, 2, or 4
- * approximates the root to within about 0.1%.  Then Newton's
- * iteration is used three times to converge to an accurate
- * result.
- *
- *
- *
- * ACCURACY:
- *
- *                      Relative error:
- * arithmetic   domain     # trials      peak         rms
- *    IEEE     .125,8        80000      7.0e-20     2.2e-20
- *    IEEE    exp(+-707)    100000      7.0e-20     2.4e-20
- *
- */
-
-
-/*
-Cephes Math Library Release 2.2: January, 1991
-Copyright 1984, 1991 by Stephen L. Moshier
-Direct inquiries to 30 Frost Street, Cambridge, MA 02140
-*/
-
-
-#include <math.h>
-
-static long double CBRT2  = 1.2599210498948731647672L;
-static long double CBRT4  = 1.5874010519681994747517L;
-static long double CBRT2I = 0.79370052598409973737585L;
-static long double CBRT4I = 0.62996052494743658238361L;
-
-#ifdef ANSIPROT
-extern long double frexpl ( long double, int * );
-extern long double ldexpl ( long double, int );
-extern int isnanl ( long double );
-#else
-long double frexpl(), ldexpl();
-extern int isnanl();
-#endif
-
-#ifdef INFINITIES
-extern long double INFINITYL;
-#endif
-
-long double cbrtl(x)
-long double x;
-{
-int e, rem, sign;
-long double z;
-
-
-#ifdef NANS
-if(isnanl(x))
-	return(x);
-#endif
-#ifdef INFINITIES
-if( x == INFINITYL)
-	return(x);
-if( x == -INFINITYL)
-	return(x);
-#endif
-if( x == 0 )
-	return( x );
-if( x > 0 )
-	sign = 1;
-else
-	{
-	sign = -1;
-	x = -x;
-	}
-
-z = x;
-/* extract power of 2, leaving
- * mantissa between 0.5 and 1
- */
-x = frexpl( x, &e );
-
-/* Approximate cube root of number between .5 and 1,
- * peak relative error = 1.2e-6
- */
-x = (((( 1.3584464340920900529734e-1L * x
-       - 6.3986917220457538402318e-1L) * x
-       + 1.2875551670318751538055e0L) * x
-       - 1.4897083391357284957891e0L) * x
-       + 1.3304961236013647092521e0L) * x
-       + 3.7568280825958912391243e-1L;
-
-/* exponent divided by 3 */
-if( e >= 0 )
-	{
-	rem = e;
-	e /= 3;
-	rem -= 3*e;
-	if( rem == 1 )
-		x *= CBRT2;
-	else if( rem == 2 )
-		x *= CBRT4;
-	}
-else
-	{ /* argument less than 1 */
-	e = -e;
-	rem = e;
-	e /= 3;
-	rem -= 3*e;
-	if( rem == 1 )
-		x *= CBRT2I;
-	else if( rem == 2 )
-		x *= CBRT4I;
-	e = -e;
-	}
-
-/* multiply by power of 2 */
-x = ldexpl( x, e );
-
-/* Newton iteration */
-
-x -= ( x - (z/(x*x)) )*0.3333333333333333333333L;
-x -= ( x - (z/(x*x)) )*0.3333333333333333333333L;
-
-if( sign < 0 )
-	x = -x;
-return(x);
-}