version 1.1.1.1, 2000/01/10 15:35:27 |
version 1.1.1.2, 2000/09/09 14:12:56 |
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/* mpz_pow_ui(res, base, exp) -- Set RES to BASE**EXP. |
/* mpz_pow_ui(res, base, exp) -- Set RES to BASE**EXP. |
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Copyright (C) 1991, 1993, 1994, 1996 Free Software Foundation, Inc. |
Copyright (C) 1991, 1993, 1994, 1996, 1997 Free Software Foundation, Inc. |
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This file is part of the GNU MP Library. |
This file is part of the GNU MP Library. |
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The GNU MP Library is free software; you can redistribute it and/or modify |
The GNU MP Library is free software; you can redistribute it and/or modify |
it under the terms of the GNU Library General Public License as published by |
it under the terms of the GNU Lesser General Public License as published by |
the Free Software Foundation; either version 2 of the License, or (at your |
the Free Software Foundation; either version 2.1 of the License, or (at your |
option) any later version. |
option) any later version. |
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The GNU MP Library is distributed in the hope that it will be useful, but |
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 |
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public |
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
License for more details. |
License for more details. |
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You should have received a copy of the GNU Library General Public License |
You should have received a copy of the GNU Lesser General Public License |
along with the GNU MP Library; see the file COPYING.LIB. If not, write to |
along with the GNU MP Library; see the file COPYING.LIB. If not, write to |
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
MA 02111-1307, USA. */ |
MA 02111-1307, USA. */ |
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#endif /* BERKELEY_MP */ |
#endif /* BERKELEY_MP */ |
{ |
{ |
mp_ptr rp, bp, tp, xp; |
mp_ptr rp, bp, tp, xp; |
mp_size_t rsize, bsize; |
mp_size_t ralloc, rsize, bsize; |
int cnt, i; |
int cnt, i; |
mp_limb_t blimb; |
mp_limb_t blimb; |
TMP_DECL (marker); |
TMP_DECL (marker); |
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/* Estimate space requirements accurately. Using the code from the |
/* Estimate space requirements accurately. Using the code from the |
`else' path would over-estimate space requirements wildly. */ |
`else' path would over-estimate space requirements wildly. */ |
float lb = __mp_bases[blimb].chars_per_bit_exactly; |
float lb = __mp_bases[blimb].chars_per_bit_exactly; |
rsize = 2 + ((mp_size_t) (e / lb) / BITS_PER_MP_LIMB); |
ralloc = 3 + ((mp_size_t) (e / lb) / BITS_PER_MP_LIMB); |
} |
} |
else |
else |
{ |
{ |
/* Over-estimate space requirements somewhat. */ |
/* Over-estimate space requirements somewhat. */ |
count_leading_zeros (cnt, blimb); |
count_leading_zeros (cnt, blimb); |
rsize = bsize * e - cnt * e / BITS_PER_MP_LIMB + 1; |
ralloc = bsize * e - cnt * e / BITS_PER_MP_LIMB + 2; |
} |
} |
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TMP_MARK (marker); |
TMP_MARK (marker); |
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product for mpn_mul. (This scheme is used to fulfill the requirements |
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 |
of mpn_mul; that the product space may not be the same as any of the |
input operands.) */ |
input operands.) */ |
rp = (mp_ptr) TMP_ALLOC (rsize * BYTES_PER_MP_LIMB); |
rp = (mp_ptr) TMP_ALLOC (ralloc * BYTES_PER_MP_LIMB); |
tp = (mp_ptr) TMP_ALLOC (rsize * BYTES_PER_MP_LIMB); |
tp = (mp_ptr) TMP_ALLOC (ralloc * BYTES_PER_MP_LIMB); |
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MPN_COPY (rp, bp, bsize); |
MPN_COPY (rp, bp, bsize); |
rsize = bsize; |
rsize = bsize; |