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#include "libm.h"
float modff(float x, float *iptr)
{
union {float x; uint32_t n;} u = {x};
uint32_t mask;
int e;
e = (int)(u.n>>23 & 0xff) - 0x7f;
/* no fractional part */
if (e >= 23) {
*iptr = x;
if (e == 0x80 && u.n<<9 != 0) { /* nan */
return x;
}
u.n &= 0x80000000;
return u.x;
}
/* no integral part */
if (e < 0) {
u.n &= 0x80000000;
*iptr = u.x;
return x;
}
mask = 0x007fffff>>e;
if ((u.n & mask) == 0) {
*iptr = x;
u.n &= 0x80000000;
return u.x;
}
u.n &= ~mask;
*iptr = u.x;
STRICT_ASSIGN(float, x, x - *iptr);
return x;
}
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