crypto: lib - Move mpi into lib/crypto

[linux-2.6-microblaze.git] / lib / mpi / mpi-sub-ui.c

diff --git a/lib/mpi/mpi-sub-ui.c b/lib/mpi/mpi-sub-ui.c
deleted file mode 100644 (file)
index b41b082..0000000
--- a/lib/mpi/mpi-sub-ui.c
+++ /dev/null
@@ -1,78 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/* mpi-sub-ui.c - Subtract an unsigned integer from an MPI.
- *
- * Copyright 1991, 1993, 1994, 1996, 1999-2002, 2004, 2012, 2013, 2015
- * Free Software Foundation, Inc.
- *
- * This file was based on the GNU MP Library source file:
- * https://gmplib.org/repo/gmp-6.2/file/510b83519d1c/mpz/aors_ui.h
- *
- * 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 "mpi-internal.h"
-
-int mpi_sub_ui(MPI w, MPI u, unsigned long vval)
-{
-       if (u->nlimbs == 0) {
-               if (mpi_resize(w, 1) < 0)
-                       return -ENOMEM;
-               w->d[0] = vval;
-               w->nlimbs = (vval != 0);
-               w->sign = (vval != 0);
-               return 0;
-       }
-
-       /* If not space for W (and possible carry), increase space. */
-       if (mpi_resize(w, u->nlimbs + 1))
-               return -ENOMEM;
-
-       if (u->sign) {
-               mpi_limb_t cy;
-
-               cy = mpihelp_add_1(w->d, u->d, u->nlimbs, (mpi_limb_t) vval);
-               w->d[u->nlimbs] = cy;
-               w->nlimbs = u->nlimbs + cy;
-               w->sign = 1;
-       } else {
-               /* The signs are different.  Need exact comparison to determine
-                * which operand to subtract from which.
-                */
-               if (u->nlimbs == 1 && u->d[0] < vval) {
-                       w->d[0] = vval - u->d[0];
-                       w->nlimbs = 1;
-                       w->sign = 1;
-               } else {
-                       mpihelp_sub_1(w->d, u->d, u->nlimbs, (mpi_limb_t) vval);
-                       /* Size can decrease with at most one limb. */
-                       w->nlimbs = (u->nlimbs - (w->d[u->nlimbs - 1] == 0));
-                       w->sign = 0;
-               }
-       }
-
-       mpi_normalize(w);
-       return 0;
-}
-EXPORT_SYMBOL_GPL(mpi_sub_ui);