ui_pow_ui.c
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上传日期:2022-08-06
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- /* 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
- }
- }