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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.17.0/] [newlib/] [libm/] [machine/] [i386/] [f_frexpf.S] - Rev 158

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/*
 * ====================================================
 * Copyright (C) 1998, 2002 by Red Hat Inc. All rights reserved.
 *
 * Permission to use, copy, modify, and distribute this
 * software is freely granted, provided that this notice
 * is preserved.
 * ====================================================
 */

#if !defined(_SOFT_FLOAT)

/*
Fast version of frexpf using Intel float instructions.

   float _f_frexpf (float x, int *exp);

Function splits x into y * 2 ** z.  It then
returns the value of y and updates *exp with z.
There is no error checking or setting of errno.
*/

        #include "i386mach.h"

        .global SYM (_f_frexpf)
       SOTYPE_FUNCTION(_f_frexpf)

SYM (_f_frexpf):
        pushl ebp
        movl esp,ebp
        flds 8(ebp)
        movl 12(ebp),eax

        fxtract
        fld1
        fchs
        fxch
        fscale
        fstp st1
        fxch
        fld1
        faddp
        fistpl 0(eax)

        leave
        ret

#endif

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