zircon/third_party/ulib/musl/src/math/truncf.c

#include "libm.h"

float truncf(float x) {
  union {
    float f;
    uint32_t i;
  } u = {x};
  int e = (int)(u.i >> 23 & 0xff) - 0x7f + 9;
  uint32_t m;

  if (e >= 23 + 9)
    return x;
  if (e < 9)
    e = 1;
  m = -1U >> e;
  if ((u.i & m) == 0)
    return x;
  FORCE_EVAL(x + 0x1p120f);
  u.i &= ~m;
  return u.f;
}