lib/libm/i386/s_ceill.S

   1 /*
   2  * Based on code written by J.T. Conklin <jtc@NetBSD.org>.
   3  * Public domain.
   4  *
   5  * $FreeBSD: head/lib/msun/i387/s_ceill.S 217108 2011-01-07 16:13:12Z kib $
   6  */
   7
   8 #include <machine/asm.h>
   9
  10 ENTRY(ceill)
  11         pushl   %ebp
  12         movl    %esp,%ebp
  13         subl    $8,%esp
  14
  15         fstcw   -4(%ebp)                /* store fpu control word */
  16         movw    -4(%ebp),%dx
  17         orw     $0x0800,%dx             /* round towards +oo */
  18         andw    $0xfbff,%dx
  19         movw    %dx,-8(%ebp)
  20         fldcw   -8(%ebp)                /* load modfied control word */
  21
  22         fldt    8(%ebp)                 /* round */
  23         frndint
  24
  25         fldcw   -4(%ebp)                /* restore original control word */
  26
  27         leave
  28         ret
  29 END(ceill)
  30
  31         .section .note.GNU-stack,"",%progbits