gcc/gmp/mpz/ui_pow_ui.c

/* mpz_ui_pow_ui -- ulong raised to ulong.

Copyright 2001, 2002 Free Software Foundation, Inc.

This file is part of the GNU MP Library.

The GNU MP Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 3 of the License, or (at your
option) any later version.

The GNU MP Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
License for more details.

You should have received a copy of the GNU Lesser General Public License
along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.  */

#include "gmp.h"
#include "gmp-impl.h"


void
mpz_ui_pow_ui (mpz_ptr r, unsigned long b, unsigned long e)
{
#if GMP_NAIL_BITS != 0
  if (b > GMP_NUMB_MAX)
    {
      mp_limb_t bb[2];
      bb[0] = b & GMP_NUMB_MASK;
      bb[1] = b >> GMP_NUMB_BITS;
      mpz_n_pow_ui (r, bb, (mp_size_t) 2, e);
    }
  else
#endif
    {
#ifdef _LONG_LONG_LIMB
      /* i386 gcc 2.95.3 doesn't recognise blimb can be eliminated when
	 mp_limb_t is an unsigned long, so only use a separate blimb when
	 necessary.  */
      mp_limb_t  blimb = b;
      mpz_n_pow_ui (r, &blimb, (mp_size_t) (b != 0), e);
#else
      mpz_n_pow_ui (r, &b,     (mp_size_t) (b != 0), e);
#endif
    }
}