44 lines
859 B
C
44 lines
859 B
C
#include "libc/math/libm.h"
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#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
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long double sinhl(long double x)
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{
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return sinh(x);
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}
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#elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384
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long double sinhl(long double x)
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{
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union ldshape u = {x};
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unsigned ex = u.i.se & 0x7fff;
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long double h, t, absx;
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h = 0.5;
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if (u.i.se & 0x8000)
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h = -h;
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/* |x| */
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u.i.se = ex;
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absx = u.f;
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/* |x| < log(LDBL_MAX) */
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if (ex < 0x3fff+13 || (ex == 0x3fff+13 && u.i.m>>32 < 0xb17217f7)) {
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t = expm1l(absx);
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if (ex < 0x3fff) {
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if (ex < 0x3fff-32)
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return x;
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return h*(2*t - t*t/(1+t));
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}
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return h*(t + t/(t+1));
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}
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/* |x| > log(LDBL_MAX) or nan */
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t = expl(0.5*absx);
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return h*t*t;
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}
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#elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384
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// TODO: broken implementation to make things compile
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long double sinhl(long double x)
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{
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return sinh(x);
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}
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#endif
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