1#include "libm.h"
 2
 3#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
 4long double sinl(long double x)
 5{
 6	return sin(x);
 7}
 8#elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384
 9long double sinl(long double x)
10{
11	union ldshape u = {x};
12	unsigned n;
13	long double y[2], hi, lo;
14
15	u.i.se &= 0x7fff;
16	if (u.i.se == 0x7fff)
17		return x - x;
18	if (u.f < M_PI_4) {
19		if (u.i.se < 0x3fff - LDBL_MANT_DIG/2) {
20			/* raise inexact if x!=0 and underflow if subnormal */
21			FORCE_EVAL(u.i.se == 0 ? x*0x1p-120f : x+0x1p120f);
22			return x;
23		}
24		return __sinl(x, 0.0, 0);
25	}
26	n = __rem_pio2l(x, y);
27	hi = y[0];
28	lo = y[1];
29	switch (n & 3) {
30	case 0:
31		return __sinl(hi, lo, 1);
32	case 1:
33		return __cosl(hi, lo);
34	case 2:
35		return -__sinl(hi, lo, 1);
36	case 3:
37	default:
38		return -__cosl(hi, lo);
39	}
40}
41#endif