HEADS-UP: gcc-4.2 import appears to miscompile libm.

mobile:kargl[234] cat a.c
#include <stdio.h>
#include <math.h>

int main (void) {
   int n;
   float a;
   a = 1.f;
   printf("%f\n", frexpf(a,&n));
   return 0;
}
mobile:kargl[235] cc -o z a.c -lm
mobile:kargl[236] ./z
1.000000
mobile:kargl[237] cc --version
cc (GCC) 4.2.0 20070514 [FreeBSD]
Copyright (C) 2007 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

frexpf() should return a value in [1/2,1).

-- 
Steve