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authorAkira Kakuto <kakuto@fuk.kindai.ac.jp>2015-12-28 12:26:00 +0000
committerAkira Kakuto <kakuto@fuk.kindai.ac.jp>2015-12-28 12:26:00 +0000
commitcf483bef74e67ba3d39108df4864121c887f95e6 (patch)
tree40af58d96b6c98f2c5a5c02ccfef80b1ff7b3305 /Build/source/libs/gmp/gmp-src/mpz/fdiv_r_ui.c
parent1fff76f0c267ade1406b5a8a9a8c48c7cab1ad4f (diff)
gmp-6.1.0
git-svn-id: svn://tug.org/texlive/trunk@39212 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/libs/gmp/gmp-src/mpz/fdiv_r_ui.c')
-rw-r--r--Build/source/libs/gmp/gmp-src/mpz/fdiv_r_ui.c108
1 files changed, 108 insertions, 0 deletions
diff --git a/Build/source/libs/gmp/gmp-src/mpz/fdiv_r_ui.c b/Build/source/libs/gmp/gmp-src/mpz/fdiv_r_ui.c
new file mode 100644
index 00000000000..98dd56c6f22
--- /dev/null
+++ b/Build/source/libs/gmp/gmp-src/mpz/fdiv_r_ui.c
@@ -0,0 +1,108 @@
+/* mpz_fdiv_r_ui -- Division rounding the quotient towards -infinity.
+ The remainder gets the same sign as the denominator.
+
+Copyright 1994-1996, 2001, 2002, 2004, 2005, 2012 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.h"
+#include "gmp-impl.h"
+
+unsigned long int
+mpz_fdiv_r_ui (mpz_ptr rem, mpz_srcptr dividend, unsigned long int divisor)
+{
+ mp_size_t ns, nn;
+ mp_ptr np;
+ mp_limb_t rl;
+
+ if (UNLIKELY (divisor == 0))
+ DIVIDE_BY_ZERO;
+
+ ns = SIZ(dividend);
+ if (ns == 0)
+ {
+ SIZ(rem) = 0;
+ return 0;
+ }
+
+ nn = ABS(ns);
+ np = PTR(dividend);
+#if BITS_PER_ULONG > GMP_NUMB_BITS /* avoid warnings about shift amount */
+ if (divisor > GMP_NUMB_MAX)
+ {
+ mp_limb_t dp[2];
+ mp_ptr rp, qp;
+ mp_size_t rn;
+ TMP_DECL;
+
+ rp = MPZ_REALLOC (rem, 2);
+
+ if (nn == 1) /* tdiv_qr requirements; tested above for 0 */
+ {
+ rl = np[0];
+ rp[0] = rl;
+ }
+ else
+ {
+ TMP_MARK;
+ dp[0] = divisor & GMP_NUMB_MASK;
+ dp[1] = divisor >> GMP_NUMB_BITS;
+ qp = TMP_ALLOC_LIMBS (nn - 2 + 1);
+ mpn_tdiv_qr (qp, rp, (mp_size_t) 0, np, nn, dp, (mp_size_t) 2);
+ TMP_FREE;
+ rl = rp[0] + (rp[1] << GMP_NUMB_BITS);
+ }
+
+ if (rl != 0 && ns < 0)
+ {
+ rl = divisor - rl;
+ rp[0] = rl & GMP_NUMB_MASK;
+ rp[1] = rl >> GMP_NUMB_BITS;
+ }
+
+ rn = 1 + (rl > GMP_NUMB_MAX); rn -= (rp[rn - 1] == 0);
+ SIZ(rem) = rn;
+ }
+ else
+#endif
+ {
+ rl = mpn_mod_1 (np, nn, (mp_limb_t) divisor);
+ if (rl == 0)
+ SIZ(rem) = 0;
+ else
+ {
+ if (ns < 0)
+ rl = divisor - rl;
+
+ PTR(rem)[0] = rl;
+ SIZ(rem) = 1;
+ }
+ }
+
+ return rl;
+}