1#include "libm.h"
 2
 3float sinhf(float x)
 4{
 5	union {float f; uint32_t i;} u = {.f = x};
 6	uint32_t w;
 7	float t, h, absx;
 8
 9	h = 0.5;
10	if (u.i >> 31)
11		h = -h;
12	/* |x| */
13	u.i &= 0x7fffffff;
14	absx = u.f;
15	w = u.i;
16
17	/* |x| < log(FLT_MAX) */
18	if (w < 0x42b17217) {
19		t = expm1f(absx);
20		if (w < 0x3f800000) {
21			if (w < 0x3f800000 - (12<<23))
22				return x;
23			return h*(2*t - t*t/(t+1));
24		}
25		return h*(t + t/(t+1));
26	}
27
28	/* |x| > logf(FLT_MAX) or nan */
29#ifdef __wasilibc_unmodified_upstream // Wasm doesn't have alternate rounding modes
30	t = __expo2f(absx, 2*h);
31#else
32	t = 2*h*__expo2f(absx);
33#endif
34	return t;
35}