sysdeps/libm-i387/e_acosl.S

   1 /*
   2  * Written by J.T. Conklin <jtc@netbsd.org>.
   3  * Public domain.
   4  *
   5  * Adapted for `long double' by Ulrich Drepper <drepper@cygnus.com>.
   6  */
   7
   8 #include <machine/asm.h>
   9
  10
  11 /* acosl = atanl (sqrtl(1 - x^2) / x) */
  12 ENTRY(__ieee754_acosl)
  13         fldt    4(%esp)                 /* x */
  14         fst     %st(1)
  15         fmul    %st(0)                  /* x^2 */
  16         fld1
  17         fsubp                           /* 1 - x^2 */
  18         fsqrt                           /* sqrtl (1 - x^2) */
  19         fxch    %st(1)
  20         fpatan
  21         ret
  22 PSEUDO_END (__ieee754_acosl)