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| | #define _GNU_SOURCE
#include "libm.h"
#ifdef LONG_DOUBLE_IS_BINARY64
void sincosl(long double x, long double *sin, long double *cos)
{
double sind, cosd;
sincos(x, &sind, &cosd);
*sin = sind;
*cos = cosd;
}
#elif defined(LONG_DOUBLE_IS_X87_EXTENDED) || defined(LONG_DOUBLE_IS_BINARY128)
void sincosl(long double x, long double *sin, long double *cos)
{
union ldshape u = {x};
unsigned n;
long double y[2], s, c;
u.i.se &= 0x7fff;
if (u.i.se == 0x7fff) {
*sin = *cos = x - x;
return;
}
if (u.f < M_PI_4) {
if (u.i.se < 0x3fff - LDBL_MANT_DIG) {
/* raise underflow if subnormal */
if (u.i.se == 0) FORCE_EVAL(x*0x1p-120f);
*sin = x;
/* raise inexact if x!=0 */
*cos = 1.0 + x;
return;
}
*sin = __sinl(x, 0, 0);
*cos = __cosl(x, 0);
return;
}
n = __rem_pio2l(x, y);
s = __sinl(y[0], y[1], 1);
c = __cosl(y[0], y[1]);
switch (n & 3) {
case 0:
*sin = s;
*cos = c;
break;
case 1:
*sin = c;
*cos = -s;
break;
case 2:
*sin = -s;
*cos = -c;
break;
case 3:
default:
*sin = -c;
*cos = s;
break;
}
}
#endif
|