static double R(double z)
{
- double p, q;
+ double_t p, q;
p = z*(pS0+z*(pS1+z*(pS2+z*(pS3+z*(pS4+z*pS5)))));
q = 1.0+z*(qS1+z*(qS2+z*(qS3+z*qS4)));
return p/q;
GET_LOW_WORD(lx, x);
if ((ix-0x3ff00000 | lx) == 0)
/* asin(1) = +-pi/2 with inexact */
- return x*pio2_hi + 0x1p-1000;
+ return x*pio2_hi + 0x1p-120f;
return 0/(x-x);
}
/* |x| < 0.5 */
if (ix < 0x3fe00000) {
- if (ix < 0x3e500000) {
- /* |x|<0x1p-26, return x with inexact if x!=0*/
- FORCE_EVAL(x + 0x1p1000);
+ /* if 0x1p-1022 <= |x| < 0x1p-26, avoid raising underflow */
+ if (ix < 0x3e500000 && ix >= 0x00100000)
return x;
- }
return x + x*R(x*x);
}
/* 1 > |x| >= 0.5 */