float nexttowardf(float x, long double y)
{
- union fshape ux;
+ union {float f; uint32_t i;} ux = {x};
uint32_t e;
if (isnan(x) || isnan(y))
return x + y;
if (x == y)
return y;
- ux.value = x;
if (x == 0) {
- ux.bits = 1;
+ ux.i = 1;
if (signbit(y))
- ux.bits |= 0x80000000;
+ ux.i |= 0x80000000;
} else if (x < y) {
if (signbit(x))
- ux.bits--;
+ ux.i--;
else
- ux.bits++;
+ ux.i++;
} else {
if (signbit(x))
- ux.bits++;
+ ux.i++;
else
- ux.bits--;
+ ux.i--;
}
- e = ux.bits & 0x7f800000;
- /* raise overflow if ux.value is infinite and x is finite */
+ e = ux.i & 0x7f800000;
+ /* raise overflow if ux.f is infinite and x is finite */
if (e == 0x7f800000)
FORCE_EVAL(x+x);
- /* raise underflow if ux.value is subnormal or zero */
+ /* raise underflow if ux.f is subnormal or zero */
if (e == 0)
- FORCE_EVAL(x*x + ux.value*ux.value);
- return ux.value;
+ FORCE_EVAL(x*x + ux.f*ux.f);
+ return ux.f;
}