sysdeps/libm-i387/s_tan.S

   1 /*
   2  * Written by J.T. Conklin <jtc@netbsd.org>.
   3  * Public domain.
   4  */
   5
   6 #include <machine/asm.h>
   7
   8 RCSID("$NetBSD: s_tan.S,v 1.5 1995/05/09 00:30:00 jtc Exp $")
   9
  10 ENTRY(__tan)
  11         fldl    4(%esp)
  12         fptan
  13         fnstsw  %ax
  14         andw    $0x400,%ax
  15         jnz     1f
  16         fstp    %st(0)
  17         ret
  18 1:      fldpi
  19         fadd    %st(0)
  20         fxch    %st(1)
  21 2:      fprem1
  22         fstsw   %ax
  23         andw    $0x400,%ax
  24         jnz     2b
  25         fstp    %st(1)
  26         fptan
  27         fstp    %st(0)
  28         ret
  29 PSEUDO_END (__tan)
  30 weak_alias (__tan, tan)