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Annotation of src/lib/libm/arch/i387/s_ceil.S, Revision 1.3

1.1       jtc         1: /*
1.3     ! jtc         2:  * Written by J.T. Conklin <jtc@netbsd.org>.
        !             3:  * Public domain.
1.1       jtc         4:  */
                      5:
                      6: #include <machine/asm.h>
                      7:
1.3     ! jtc         8: RCSID("$Id: s_ceil.S,v 1.2 1994/03/12 01:30:35 jtc Exp $")
1.2       jtc         9:
1.1       jtc        10: ENTRY(ceil)
                     11:        pushl   %ebp
                     12:        movl    %esp,%ebp
                     13:        subl    $8,%esp
                     14:
                     15:        fstcw   -12(%ebp)               /* store fpu control word */
                     16:        movw    -12(%ebp),%dx
                     17:        orw     $0x0800,%dx             /* round towards +oo */
                     18:        andw    $0xfbff,%dx
                     19:        movw    %dx,-16(%ebp)
                     20:        fldcw   -16(%ebp)               /* load modfied control word */
                     21:
                     22:        fldl    8(%ebp);                /* round */
                     23:        frndint
                     24:
                     25:        fldcw   -12(%ebp)               /* restore original control word */
                     26:
                     27:        leave
                     28:        ret