workbench/libs/mathffp/spceil.c

   1 /*
   2     Copyright © 1995-2004, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #include "mathffp_intern.h"
   7
   8 /*****************************************************************************
   9
  10     NAME */
  11
  12         AROS_LH1(float, SPCeil,
  13
  14 /*  SYNOPSIS */
  15         AROS_LHA(float, y, D0),
  16
  17 /*  LOCATION */
  18         struct LibHeader *, MathBase, 16, Mathffp)
  19
  20 /*  FUNCTION
  21         Calculate the least integer ffp-number
  22         greater than or equal to fnum1
  23
  24     INPUTS
  25
  26     RESULT
  27         Flags:
  28           zero     : result is zero
  29           negative : result is negative
  30           overflow : 0
  31
  32     BUGS
  33
  34     INTERNALS
  35         ALGORITHM:
  36         Ceil(y) = - Floor(-y)
  37
  38 *****************************************************************************/
  39 {
  40     AROS_LIBFUNC_INIT
  41
  42     /* Ceil(y) = -Floor(-y) */
  43     y = SPFloor(y ^ FFPSign_Mask);
  44     return (y ^ FFPSign_Mask);
  45
  46     AROS_LIBFUNC_EXIT
  47 }