Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/gmp-source/mpz/kronzu.c

@@ -0,0 +1,88 @@
+/* mpz_kronecker_ui -- mpz+ulong Kronecker/Jacobi symbol.
+
+Copyright 1999-2002 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.
+
+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"
+#include "longlong.h"
+
+
+int
+mpz_kronecker_ui (mpz_srcptr a, unsigned long b)
+{
+  mp_srcptr  a_ptr;
+  mp_size_t  a_size;
+  mp_limb_t  a_rem;
+  int        result_bit1;
+
+  a_size = SIZ(a);
+  if (a_size == 0)
+    return JACOBI_0U (b);
+
+  if (b > GMP_NUMB_MAX)
+    {
+      mp_limb_t  blimbs[2];
+      mpz_t      bz;
+      ALLOC(bz) = numberof (blimbs);
+      PTR(bz) = blimbs;
+      mpz_set_ui (bz, b);
+      return mpz_kronecker (a, bz);
+    }
+
+  a_ptr = PTR(a);
+  if ((b & 1) != 0)
+    {
+      result_bit1 = JACOBI_ASGN_SU_BIT1 (a_size, b);
+    }
+  else
+    {
+      mp_limb_t  a_low = a_ptr[0];
+      int        twos;
+
+      if (b == 0)
+	return JACOBI_LS0 (a_low, a_size);   /* (a/0) */
+
+      if (! (a_low & 1))
+	return 0;  /* (even/even)=0 */
+
+      /* (a/2)=(2/a) for a odd */
+      count_trailing_zeros (twos, b);
+      b >>= twos;
+      result_bit1 = (JACOBI_TWOS_U_BIT1 (twos, a_low)
+		     ^ JACOBI_ASGN_SU_BIT1 (a_size, b));
+    }
+
+  if (b == 1)
+    return JACOBI_BIT1_TO_PN (result_bit1);  /* (a/1)=1 for any a */
+
+  a_size = ABS(a_size);
+
+  /* (a/b) = (a mod b / b) */
+  JACOBI_MOD_OR_MODEXACT_1_ODD (result_bit1, a_rem, a_ptr, a_size, b);
+  return mpn_jacobi_base (a_rem, (mp_limb_t) b, result_bit1);
+}