+#define _GNU_SOURCE
#include "libm.h"
#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
void sincosl(long double x, long double *sin, long double *cos)
{
- double s, c;
- sincos(x, &s, &c);
- *sin = s;
- *cos = c;
+ double sind, cosd;
+ sincos(x, &sind, &cosd);
+ *sin = sind;
+ *cos = cosd;
}
#elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384
void sincosl(long double x, long double *sin, long double *cos)
{
- union IEEEl2bits u;
- int n;
+ union ldshape u = {x};
+ unsigned n;
long double y[2], s, c;
- u.e = x;
- u.bits.sign = 0;
-
- /* x = +-0 or subnormal */
- if (!u.bits.exp) {
- *sin = x;
- *cos = 1.0;
- return;
- }
-
- /* x = nan or inf */
- if (u.bits.exp == 0x7fff) {
+ u.i.se &= 0x7fff;
+ if (u.i.se == 0x7fff) {
*sin = *cos = x - x;
return;
}
-
- /* |x| < pi/4 */
- if (u.e < M_PI_4) {
+ 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]);