[Bug math/5781] Slow dbl-64 sin/cos/sincos for special values

["grugh at centrum dot cz" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=5781

--- Comment #16 from Petr Cervenka <grugh at centrum dot cz> ---
Simple workaround to use fast computation is to use functions from spec. header
similar to following:

#ifndef FAST_MATH_H
#define    FAST_MATH_H

#include <cmath>

inline double fast_sin(long double x) {
    return sinl(x);
}

inline double fast_cos(long double x) {
    return cosl(x);
}

inline double fast_tan(long double x) {
    return tanl(x);
}

inline double fast_asin(long double x) {
    return asinl(x);
}

inline double fast_acos(long double x) {
    return acosl(x);
}

inline double fast_atan(long double x) {
    return atanl(x);
}

inline double fast_atan2(long double x, long double y) {
    return atan2l(x, y);
}

inline double fast_sinh(long double x) {
    return sinhl(x);
}

inline double fast_cosh(long double x) {
    return coshl(x);
}

inline double fast_asinh(long double x) {
    return asinhl(x);
}

inline double fast_acosh(long double x) {
    return acoshl(x);
}

inline double fast_pow(long double x, long double y) {
    return powl(x, y);
}

inline double fast_sqrt(long double x) {
    return sqrtl(x);
}

inline double fast_exp(long double x) {
    return expl(x);
}

inline double fast_log(long double x) {
    return logl(x);
}

inline double fast_log10(long double x) {
    return log10l(x);
}

#endif    /* FAST_MATH_H */

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