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Annotation of coherent/d/lib/libm/tanh.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Hyperbolic tangent.
        !             3:  */
        !             4: #include <math.h>
        !             5: 
        !             6: #if    EMU87
        !             7: #include "emumath.h"
        !             8: #endif
        !             9: 
        !            10: double
        !            11: tanh(x)
        !            12: double x;
        !            13: {
        !            14:        double r;
        !            15:        register int s;
        !            16: 
        !            17:        s = 0;
        !            18:        if (x < 0.0) {
        !            19:                x = -x;
        !            20:                s = 1;
        !            21:        }
        !            22:        r = exp(-2.0*x);
        !            23:        r = (1.0-r) / (1.0+r);
        !            24:        return (s?-r:r);
        !            25: }

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