lib/sdk/crt/math/i386/ceilf.S

   1 /**
   2  * This file has no copyright assigned and is placed in the Public Domain.
   3  * This file is part of the w64 mingw-runtime package.
   4  * No warranty is given; refer to the file DISCLAIMER.PD within this package.
   5  */
   6
   7 #include <reactos/asm.h>
   8
   9 .code
  10 .align 4
  11
  12 PUBLIC _ceilf
  13 _ceilf:
  14
  15         fld dword ptr [esp + 4]
  16         sub esp, 8
  17
  18         fstcw [esp + 4]                 /* store fpu control word */
  19
  20         /* We use here %edx although only the low 1 bits are defined.
  21            But none of the operations should care and they are faster
  22            than the 16 bit operations.  */
  23         mov edx, [esp + 4]
  24         or edx,  HEX(0800)              /* round towards +oo */
  25         and edx, HEX(fbff)
  26         mov [esp], edx
  27         fldcw [esp]                     /* load modified control word */
  28
  29         frndint                         /* round */
  30
  31         fldcw [esp + 4]                 /* restore original control word */
  32
  33         add esp, 8
  34         ret
  35
  36 END