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f133d007f9
Old version was from 2012-05-06, 6.1.2 is from 2016-12-16 A lot of support for newer processors and speedups since then See gmp/NEWS for details
71 lines
1.8 KiB
C
71 lines
1.8 KiB
C
/* mpz_cmp_si(u,v) -- Compare an integer U with a single-word int V.
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Return positive, zero, or negative based on if U > V, U == V, or U < V.
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Copyright 1991, 1993-1996, 2000-2002, 2012, 2013 Free Software Foundation, Inc.
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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
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it under the terms of either:
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at your
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option) any later version.
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or
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* the GNU General Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at your option) any
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later version.
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or both in parallel, as here.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received copies of the GNU General Public License and the
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GNU Lesser General Public License along with the GNU MP Library. If not,
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see https://www.gnu.org/licenses/. */
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#include "gmp.h"
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#include "gmp-impl.h"
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int
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_mpz_cmp_si (mpz_srcptr u, signed long int v_digit) __GMP_NOTHROW
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{
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#if GMP_NAIL_BITS != 0
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/* FIXME. This isn't very pretty. */
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mpz_t tmp;
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mp_limb_t tt[2];
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PTR(tmp) = tt;
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ALLOC(tmp) = 2;
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mpz_set_si (tmp, v_digit);
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return mpz_cmp (u, tmp);
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#else
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mp_size_t vsize, usize;
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usize = SIZ (u);
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vsize = (v_digit > 0) - (v_digit < 0);
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if ((usize == 0) | (usize != vsize))
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return usize - vsize;
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else {
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mp_limb_t u_digit, absv_digit;
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u_digit = PTR (u)[0];
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absv_digit = ABS_CAST (unsigned long, v_digit);
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if (u_digit == absv_digit)
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return 0;
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if (u_digit > absv_digit)
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return usize;
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else
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return -usize;
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}
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#endif
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}
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