diff options
Diffstat (limited to 'vendor/gmp-6.3.0/mpz/aors_ui.h')
| -rw-r--r-- | vendor/gmp-6.3.0/mpz/aors_ui.h | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/vendor/gmp-6.3.0/mpz/aors_ui.h b/vendor/gmp-6.3.0/mpz/aors_ui.h new file mode 100644 index 0000000..cbc467b --- /dev/null +++ b/vendor/gmp-6.3.0/mpz/aors_ui.h @@ -0,0 +1,125 @@ +/* mpz_add_ui, mpz_sub_ui -- Add or subtract an mpz_t and an unsigned + one-word integer. + +Copyright 1991, 1993, 1994, 1996, 1999-2002, 2004, 2012, 2013, 2015, +2020 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 either: + + * 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. + +or + + * the GNU General Public License as published by the Free Software + Foundation; either version 2 of the License, or (at your option) any + later version. + +or both in parallel, as here. + +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 General Public License +for more details. + +You should have received copies of the GNU General Public License and the +GNU Lesser General Public License along with the GNU MP Library. If not, +see https://www.gnu.org/licenses/. */ + +#include "gmp-impl.h" + + +#ifdef OPERATION_add_ui +#define FUNCTION mpz_add_ui +#define FUNCTION2 mpz_add +#define VARIATION_CMP >= +#define VARIATION_NEG +#define VARIATION_UNNEG - +#endif + +#ifdef OPERATION_sub_ui +#define FUNCTION mpz_sub_ui +#define FUNCTION2 mpz_sub +#define VARIATION_CMP < +#define VARIATION_NEG - +#define VARIATION_UNNEG +#endif + +#ifndef FUNCTION +Error, need OPERATION_add_ui or OPERATION_sub_ui +#endif + + +void +FUNCTION (mpz_ptr w, mpz_srcptr u, unsigned long int vval) +{ + mp_srcptr up; + mp_ptr wp; + mp_size_t usize, wsize; + mp_size_t abs_usize; + +#if BITS_PER_ULONG > GMP_NUMB_BITS /* avoid warnings about shift amount */ + if (vval > GMP_NUMB_MAX) + { + mpz_t v; + mp_limb_t vl[2]; + PTR(v) = vl; + vl[0] = vval & GMP_NUMB_MASK; + vl[1] = vval >> GMP_NUMB_BITS; + SIZ(v) = 2; + FUNCTION2 (w, u, v); + return; + } +#endif + + usize = SIZ (u); + if (usize == 0) + { + MPZ_NEWALLOC (w, 1)[0] = vval; + SIZ (w) = VARIATION_NEG (vval != 0); + return; + } + + abs_usize = ABS (usize); + + if (usize VARIATION_CMP 0) + { + mp_limb_t cy; + + /* If not space for W (and possible carry), increase space. */ + wp = MPZ_REALLOC (w, abs_usize + 1); + /* These must be after realloc (U may be the same as W). */ + up = PTR (u); + + cy = mpn_add_1 (wp, up, abs_usize, (mp_limb_t) vval); + wp[abs_usize] = cy; + wsize = VARIATION_NEG (abs_usize + cy); + } + else + { + /* If not space for W, increase space. */ + wp = MPZ_REALLOC (w, abs_usize); + /* These must be after realloc (U may be the same as W). */ + up = PTR (u); + + /* The signs are different. Need exact comparison to determine + which operand to subtract from which. */ + if (abs_usize == 1 && up[0] < vval) + { + wp[0] = vval - up[0]; + wsize = VARIATION_NEG 1; + } + else + { + mpn_sub_1 (wp, up, abs_usize, (mp_limb_t) vval); + /* Size can decrease with at most one limb. */ + wsize = VARIATION_UNNEG (abs_usize - (wp[abs_usize - 1] == 0)); + } + } + + SIZ (w) = wsize; +} |