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/* s_frexpl.c -- long double version of s_frexp.c.

 * Conversion to IEEE quad long double by Jakub Jelinek, jj@ultra.linux.cz.

 */

/*

 * ====================================================

 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.

 *

 * Developed at SunPro, a Sun Microsystems, Inc. business.

 * Permission to use, copy, modify, and distribute this

 * software is freely granted, provided that this notice

 * is preserved.

 * ====================================================

 */

/*

 * for non-zero x

 *      x = frexpq(arg,&exp);

 * return a __float128 fp quantity x such that 0.5 <= |x| <1.0

 * and the corresponding binary exponent "exp". That is

 *      arg = x*2^exp.

 * If arg is inf, 0.0, or NaN, then frexpq(arg,&exp) returns arg

 * with *exp=0.

 */

#include "quadmath-imp.h"

static const __float128

two114 = 2.0769187434139310514121985316880384E+34Q; /* 0x4071000000000000, 0 */

__float128

frexpq (__float128 x, int *eptr)

{

  uint64_t hx, lx, ix;

  GET_FLT128_WORDS64(hx,lx,x);

  ix = 0x7fffffffffffffffULL&hx;

  *eptr = 0;

  if(ix>=0x7fff000000000000ULL||((ix|lx)==0)) return x;  /* 0,inf,nan */

  if (ix<0x0001000000000000ULL) {               /* subnormal */

    x *= two114;

    GET_FLT128_MSW64(hx,x);

    ix = hx&0x7fffffffffffffffULL;

    *eptr = -114;

  }

  *eptr += (ix>>48)-16382;

  hx = (hx&0x8000ffffffffffffULL) | 0x3ffe000000000000ULL;

  SET_FLT128_MSW64(x,hx);

  return x;

}