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Diffstat (limited to 'libm/float/ellpef.c')
-rw-r--r-- | libm/float/ellpef.c | 105 |
1 files changed, 0 insertions, 105 deletions
diff --git a/libm/float/ellpef.c b/libm/float/ellpef.c deleted file mode 100644 index 645bc55ba..000000000 --- a/libm/float/ellpef.c +++ /dev/null @@ -1,105 +0,0 @@ -/* ellpef.c - * - * Complete elliptic integral of the second kind - * - * - * - * SYNOPSIS: - * - * float m1, y, ellpef(); - * - * y = ellpef( m1 ); - * - * - * - * DESCRIPTION: - * - * Approximates the integral - * - * - * pi/2 - * - - * | | 2 - * E(m) = | sqrt( 1 - m sin t ) dt - * | | - * - - * 0 - * - * Where m = 1 - m1, using the approximation - * - * P(x) - x log x Q(x). - * - * Though there are no singularities, the argument m1 is used - * rather than m for compatibility with ellpk(). - * - * E(1) = 1; E(0) = pi/2. - * - * - * ACCURACY: - * - * Relative error: - * arithmetic domain # trials peak rms - * IEEE 0, 1 30000 1.1e-7 3.9e-8 - * - * - * ERROR MESSAGES: - * - * message condition value returned - * ellpef domain x<0, x>1 0.0 - * - */ - -/* ellpe.c */ - -/* Elliptic integral of second kind */ - -/* -Cephes Math Library, Release 2.1: February, 1989 -Copyright 1984, 1987, 1989 by Stephen L. Moshier -Direct inquiries to 30 Frost Street, Cambridge, MA 02140 -*/ - -#include <math.h> - - -static float P[] = { - 1.53552577301013293365E-4, - 2.50888492163602060990E-3, - 8.68786816565889628429E-3, - 1.07350949056076193403E-2, - 7.77395492516787092951E-3, - 7.58395289413514708519E-3, - 1.15688436810574127319E-2, - 2.18317996015557253103E-2, - 5.68051945617860553470E-2, - 4.43147180560990850618E-1, - 1.00000000000000000299E0 -}; -static float Q[] = { - 3.27954898576485872656E-5, - 1.00962792679356715133E-3, - 6.50609489976927491433E-3, - 1.68862163993311317300E-2, - 2.61769742454493659583E-2, - 3.34833904888224918614E-2, - 4.27180926518931511717E-2, - 5.85936634471101055642E-2, - 9.37499997197644278445E-2, - 2.49999999999888314361E-1 -}; - -float polevlf(float, float *, int), logf(float); -float ellpef( float xx) -{ -float x; - -x = xx; -if( (x <= 0.0) || (x > 1.0) ) - { - if( x == 0.0 ) - return( 1.0 ); - mtherr( "ellpef", DOMAIN ); - return( 0.0 ); - } -return( polevlf(x,P,10) - logf(x) * (x * polevlf(x,Q,9)) ); -} |