sdk/lib/crt/math/i386/atan2.c

   1
   2 #include <math.h>
   3
   4 double atan2 (double __y, double __x);
   5
   6 /*
   7  * @implemented
   8  */
   9 double atan2 (double __y, double __x)
  10 {
  11   register double __val;
  12 #ifdef __GNUC__
  13   __asm __volatile__
  14     ("fpatan\n\t"
  15      "fld %%st(0)"
  16      : "=t" (__val) : "0" (__x), "u" (__y));
  17 #else
  18   __asm
  19   {
  20     fld __y
  21     fld __x
  22     fpatan
  23     fstp __val
  24   }
  25 #endif /*__GNUC__*/
  26   return __val;
  27 }