summaryrefslogtreecommitdiff
path: root/Build/source/libs/gmp/gmp-6.0.0/mpn/generic/nussbaumer_mul.c
diff options
context:
space:
mode:
Diffstat (limited to 'Build/source/libs/gmp/gmp-6.0.0/mpn/generic/nussbaumer_mul.c')
-rw-r--r--Build/source/libs/gmp/gmp-6.0.0/mpn/generic/nussbaumer_mul.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/Build/source/libs/gmp/gmp-6.0.0/mpn/generic/nussbaumer_mul.c b/Build/source/libs/gmp/gmp-6.0.0/mpn/generic/nussbaumer_mul.c
new file mode 100644
index 00000000000..d2bf19ad56a
--- /dev/null
+++ b/Build/source/libs/gmp/gmp-6.0.0/mpn/generic/nussbaumer_mul.c
@@ -0,0 +1,71 @@
+/* mpn_nussbaumer_mul -- Multiply {ap,an} and {bp,bn} using
+ Nussbaumer's negacyclic convolution.
+
+ Contributed to the GNU project by Marco Bodrato.
+
+ THE FUNCTION IN THIS FILE IS INTERNAL WITH A MUTABLE INTERFACE. IT IS ONLY
+ SAFE TO REACH IT THROUGH DOCUMENTED INTERFACES. IN FACT, IT IS ALMOST
+ GUARANTEED THAT IT WILL CHANGE OR DISAPPEAR IN A FUTURE GNU MP RELEASE.
+
+Copyright 2009 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"
+
+/* Multiply {ap,an} by {bp,bn}, and put the result in {pp, an+bn} */
+void
+mpn_nussbaumer_mul (mp_ptr pp,
+ mp_srcptr ap, mp_size_t an,
+ mp_srcptr bp, mp_size_t bn)
+{
+ mp_size_t rn;
+ mp_ptr tp;
+ TMP_DECL;
+
+ ASSERT (an >= bn);
+ ASSERT (bn > 0);
+
+ TMP_MARK;
+
+ if ((ap == bp) && (an == bn))
+ {
+ rn = mpn_sqrmod_bnm1_next_size (2*an);
+ tp = TMP_ALLOC_LIMBS (mpn_sqrmod_bnm1_itch (rn, an));
+ mpn_sqrmod_bnm1 (pp, rn, ap, an, tp);
+ }
+ else
+ {
+ rn = mpn_mulmod_bnm1_next_size (an + bn);
+ tp = TMP_ALLOC_LIMBS (mpn_mulmod_bnm1_itch (rn, an, bn));
+ mpn_mulmod_bnm1 (pp, rn, ap, an, bp, bn, tp);
+ }
+
+ TMP_FREE;
+}