=================================================================== RCS file: /home/cvs/OpenXM_contrib/gmp/mpz/Attic/pow_ui.c,v retrieving revision 1.1.1.2 retrieving revision 1.1.1.3 diff -u -p -r1.1.1.2 -r1.1.1.3 --- OpenXM_contrib/gmp/mpz/Attic/pow_ui.c 2000/09/09 14:12:56 1.1.1.2 +++ OpenXM_contrib/gmp/mpz/Attic/pow_ui.c 2003/08/25 16:06:33 1.1.1.3 @@ -1,6 +1,6 @@ -/* mpz_pow_ui(res, base, exp) -- Set RES to BASE**EXP. +/* mpz_pow_ui -- mpz raised to ulong. -Copyright (C) 1991, 1993, 1994, 1996, 1997 Free Software Foundation, Inc. +Copyright 2001 Free Software Foundation, Inc. This file is part of the GNU MP Library. @@ -19,111 +19,11 @@ along with the GNU MP Library; see the file COPYING.LI the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ -#ifdef BERKELEY_MP -#include "mp.h" -#endif #include "gmp.h" #include "gmp-impl.h" -#include "longlong.h" -#ifndef BERKELEY_MP void -#if __STDC__ mpz_pow_ui (mpz_ptr r, mpz_srcptr b, unsigned long int e) -#else -mpz_pow_ui (r, b, e) - mpz_ptr r; - mpz_srcptr b; - unsigned long int e; -#endif -#else /* BERKELEY_MP */ -void -#if __STDC__ -rpow (const MINT *b, signed short int e, MINT *r) -#else -rpow (b, e, r) - const MINT *b; - signed short int e; - MINT *r; -#endif -#endif /* BERKELEY_MP */ { - mp_ptr rp, bp, tp, xp; - mp_size_t ralloc, rsize, bsize; - int cnt, i; - mp_limb_t blimb; - TMP_DECL (marker); - - bsize = ABS (b->_mp_size); - - /* Single out cases that give result == 0 or 1. These tests are here - to simplify the general code below, not to optimize. */ - if (e == 0) - { - r->_mp_d[0] = 1; - r->_mp_size = 1; - return; - } - if (bsize == 0 -#ifdef BERKELEY_MP - || e < 0 -#endif - ) - { - r->_mp_size = 0; - return; - } - - bp = b->_mp_d; - - blimb = bp[bsize - 1]; - if (bsize == 1 && blimb < 0x100) - { - /* Estimate space requirements accurately. Using the code from the - `else' path would over-estimate space requirements wildly. */ - float lb = __mp_bases[blimb].chars_per_bit_exactly; - ralloc = 3 + ((mp_size_t) (e / lb) / BITS_PER_MP_LIMB); - } - else - { - /* Over-estimate space requirements somewhat. */ - count_leading_zeros (cnt, blimb); - ralloc = bsize * e - cnt * e / BITS_PER_MP_LIMB + 2; - } - - TMP_MARK (marker); - - /* The two areas are used to alternatingly hold the input and recieve the - product for mpn_mul. (This scheme is used to fulfill the requirements - of mpn_mul; that the product space may not be the same as any of the - input operands.) */ - rp = (mp_ptr) TMP_ALLOC (ralloc * BYTES_PER_MP_LIMB); - tp = (mp_ptr) TMP_ALLOC (ralloc * BYTES_PER_MP_LIMB); - - MPN_COPY (rp, bp, bsize); - rsize = bsize; - count_leading_zeros (cnt, e); - - for (i = BITS_PER_MP_LIMB - cnt - 2; i >= 0; i--) - { - mpn_mul_n (tp, rp, rp, rsize); - rsize = 2 * rsize; - rsize -= tp[rsize - 1] == 0; - xp = tp; tp = rp; rp = xp; - - if ((e & ((mp_limb_t) 1 << i)) != 0) - { - rsize = rsize + bsize - (mpn_mul (tp, rp, rsize, bp, bsize) == 0); - xp = tp; tp = rp; rp = xp; - } - } - - /* Now then we know the exact space requirements, reallocate if - necessary. */ - if (r->_mp_alloc < rsize) - _mpz_realloc (r, rsize); - - MPN_COPY (r->_mp_d, rp, rsize); - r->_mp_size = (e & 1) == 0 || b->_mp_size >= 0 ? rsize : -rsize; - TMP_FREE (marker); + mpz_n_pow_ui (r, PTR(b), (mp_size_t) SIZ(b), e); }