diff options
Diffstat (limited to 'gmp/mpz/cmp_si.c')
-rw-r--r-- | gmp/mpz/cmp_si.c | 72 |
1 files changed, 34 insertions, 38 deletions
diff --git a/gmp/mpz/cmp_si.c b/gmp/mpz/cmp_si.c index 86251f436a..f53932e139 100644 --- a/gmp/mpz/cmp_si.c +++ b/gmp/mpz/cmp_si.c @@ -1,40 +1,34 @@ /* mpz_cmp_si(u,v) -- Compare an integer U with a single-word int V. Return positive, zero, or negative based on if U > V, U == V, or U < V. -Copyright 1991, 1993-1996, 2000-2002, 2012, 2013 Free Software Foundation, Inc. +Copyright 1991, 1993, 1994, 1995, 1996, 2000, 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 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. +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 General Public License -for more details. +or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser 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/. */ +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" int -_mpz_cmp_si (mpz_srcptr u, signed long int v_digit) __GMP_NOTHROW +_mpz_cmp_si (mpz_srcptr u, signed long int v_digit) { + mp_size_t usize = u->_mp_size; + mp_size_t vsize; + mp_limb_t u_digit; + #if GMP_NAIL_BITS != 0 /* FIXME. This isn't very pretty. */ mpz_t tmp; @@ -43,28 +37,30 @@ _mpz_cmp_si (mpz_srcptr u, signed long int v_digit) __GMP_NOTHROW ALLOC(tmp) = 2; mpz_set_si (tmp, v_digit); return mpz_cmp (u, tmp); -#else - - mp_size_t vsize, usize; +#endif - usize = SIZ (u); - vsize = (v_digit > 0) - (v_digit < 0); + vsize = 0; + if (v_digit > 0) + vsize = 1; + else if (v_digit < 0) + { + vsize = -1; + v_digit = -v_digit; + } - if ((usize == 0) | (usize != vsize)) + if (usize != vsize) return usize - vsize; - else { - mp_limb_t u_digit, absv_digit; - u_digit = PTR (u)[0]; - absv_digit = ABS_CAST (unsigned long, v_digit); + if (usize == 0) + return 0; - if (u_digit == absv_digit) - return 0; + u_digit = u->_mp_d[0]; - if (u_digit > absv_digit) - return usize; - else - return -usize; - } -#endif + if (u_digit == (mp_limb_t) (unsigned long) v_digit) + return 0; + + if (u_digit > (mp_limb_t) (unsigned long) v_digit) + return usize; + else + return -usize; } |