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  1. /*
  2.  * Written by J.T. Conklin <jtc@netbsd.org>.
  3.  * Changes for long double by Ulrich Drepper <drepper@cygnus.com>
  4.  * Public domain.
  5.  */
  6.  
  7. #include <math.h>
  8.  
  9. float
  10. logbf (float x)
  11. {
  12.   float res;
  13.   asm ("fxtract\n\t"
  14.        "fstp    %%st" : "=t" (res) : "0" (x));
  15.   return res;
  16. }
  17.