--- /dev/null
+#include <math.h>
+#include <stdint.h>
+
+float frexpf(float x, int *e)
+{
+ union { float f; uint32_t i; } y = { x };
+ int ee = y.i>>23 & 0xff;
+
+ if (!ee) {
+ if (x) {
+ x = frexpf(x*0x1p64, e);
+ *e -= 64;
+ } else *e = 0;
+ return x;
+ } else if (ee == 0xff) {
+ return x;
+ }
+
+ *e = ee - 0x7e;
+ y.i &= 0x807ffffful;
+ y.i |= 0x3f000000ul;
+ return y.f;
+}