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| | #include "libm.h"
#ifdef LONG_DOUBLE_IS_BINARY64
long double scalbnl(long double x, int n)
{
return scalbn(x, n);
}
#elif defined(LONG_DOUBLE_IS_X87_EXTENDED) || defined(LONG_DOUBLE_IS_BINARY128)
long double scalbnl(long double x, int n)
{
union ldshape u;
if (n > 16383) {
x *= 0x1p16383L;
n -= 16383;
if (n > 16383) {
x *= 0x1p16383L;
n -= 16383;
if (n > 16383)
n = 16383;
}
} else if (n < -16382) {
x *= 0x1p-16382L;
n += 16382;
if (n < -16382) {
x *= 0x1p-16382L;
n += 16382;
if (n < -16382)
n = -16382;
}
}
u.f = 1.0;
u.i.se = 0x3fff + n;
return x * u.f;
}
#endif
|