newlib-cygwin/newlib/libc/machine/i386/f_frexpf.S

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2000-02-18 03:39:52 +08:00
/*
* ====================================================
* Copyright (C) 1998 by Cygnus Solutions. 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)
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/*
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)
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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