From 11da511c784eca003deb90c23570f0873954e0de Mon Sep 17 00:00:00 2001
From: Duncan Wilkie <antigravityd@gmail.com>
Date: Sat, 18 Nov 2023 06:11:09 -0600
Subject: Initial commit.

---
 gmp-6.3.0/mpz/lcm.c | 87 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 gmp-6.3.0/mpz/lcm.c

(limited to 'gmp-6.3.0/mpz/lcm.c')

diff --git a/gmp-6.3.0/mpz/lcm.c b/gmp-6.3.0/mpz/lcm.c
new file mode 100644
index 0000000..2807ef7
--- /dev/null
+++ b/gmp-6.3.0/mpz/lcm.c
@@ -0,0 +1,87 @@
+/* mpz_lcm -- mpz/mpz least common multiple.
+
+Copyright 1996, 2000, 2001, 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-impl.h"
+
+void
+mpz_lcm (mpz_ptr r, mpz_srcptr u, mpz_srcptr v)
+{
+  mpz_t g;
+  mp_size_t usize, vsize;
+  TMP_DECL;
+
+  usize = SIZ (u);
+  vsize = SIZ (v);
+  if (usize == 0 || vsize == 0)
+    {
+      SIZ (r) = 0;
+      return;
+    }
+  usize = ABS (usize);
+  vsize = ABS (vsize);
+
+  if (vsize == 1 || usize == 1)
+    {
+      mp_limb_t  vl, gl, c;
+      mp_srcptr  up;
+      mp_ptr     rp;
+
+      if (usize == 1)
+	{
+	  usize = vsize;
+	  MPZ_SRCPTR_SWAP (u, v);
+	}
+
+      MPZ_REALLOC (r, usize+1);
+
+      up = PTR(u);
+      vl = PTR(v)[0];
+      gl = mpn_gcd_1 (up, usize, vl);
+      vl /= gl;
+
+      rp = PTR(r);
+      c = mpn_mul_1 (rp, up, usize, vl);
+      rp[usize] = c;
+      usize += (c != 0);
+      SIZ(r) = usize;
+      return;
+    }
+
+  TMP_MARK;
+  MPZ_TMP_INIT (g, usize); /* v != 0 implies |gcd(u,v)| <= |u| */
+
+  mpz_gcd (g, u, v);
+  mpz_divexact (g, u, g);
+  mpz_mul (r, g, v);
+
+  SIZ (r) = ABS (SIZ (r));	/* result always positive */
+
+  TMP_FREE;
+}
-- 
cgit v1.2.3