1  /* mpz_ui_pow_ui -- ulong raised to ulong.
       2  
       3  Copyright 2001, 2002 Free Software Foundation, Inc.
       4  
       5  This file is part of the GNU MP Library.
       6  
       7  The GNU MP Library is free software; you can redistribute it and/or modify
       8  it under the terms of either:
       9  
      10    * the GNU Lesser General Public License as published by the Free
      11      Software Foundation; either version 3 of the License, or (at your
      12      option) any later version.
      13  
      14  or
      15  
      16    * the GNU General Public License as published by the Free Software
      17      Foundation; either version 2 of the License, or (at your option) any
      18      later version.
      19  
      20  or both in parallel, as here.
      21  
      22  The GNU MP Library is distributed in the hope that it will be useful, but
      23  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
      24  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      25  for more details.
      26  
      27  You should have received copies of the GNU General Public License and the
      28  GNU Lesser General Public License along with the GNU MP Library.  If not,
      29  see https://www.gnu.org/licenses/.  */
      30  
      31  #include "gmp-impl.h"
      32  
      33  
      34  void
      35  mpz_ui_pow_ui (mpz_ptr r, unsigned long b, unsigned long e)
      36  {
      37  #if GMP_NAIL_BITS != 0
      38    if (b > GMP_NUMB_MAX)
      39      {
      40        mp_limb_t bb[2];
      41        bb[0] = b & GMP_NUMB_MASK;
      42        bb[1] = b >> GMP_NUMB_BITS;
      43        mpz_n_pow_ui (r, bb, (mp_size_t) 2, e);
      44      }
      45    else
      46  #endif
      47      {
      48  #ifdef _LONG_LONG_LIMB
      49        /* i386 gcc 2.95.3 doesn't recognise blimb can be eliminated when
      50  	 mp_limb_t is an unsigned long, so only use a separate blimb when
      51  	 necessary.  */
      52        mp_limb_t  blimb = b;
      53        mpz_n_pow_ui (r, &blimb, (mp_size_t) (b != 0), e);
      54  #else
      55        mpz_n_pow_ui (r, &b,     (mp_size_t) (b != 0), e);
      56  #endif
      57      }
      58  }