--- /dev/null
+/* mpz_set_f (dest_integer, src_float) -- Assign DEST_INTEGER from SRC_FLOAT.
+
+Copyright 1996, 2001 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 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.
+
+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 Lesser General Public
+License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
+
+#include "gmp.h"
+#include "gmp-impl.h"
+
+
+void
+mpz_set_f (mpz_ptr w, mpf_srcptr u)
+{
+ mp_ptr wp, up;
+ mp_size_t size;
+ mp_exp_t exp;
+
+ /* abs(u)<1 truncates to zero */
+ exp = EXP (u);
+ if (exp <= 0)
+ {
+ SIZ(w) = 0;
+ return;
+ }
+
+ MPZ_REALLOC (w, exp);
+ wp = PTR(w);
+ up = PTR(u);
+
+ size = SIZ (u);
+ SIZ(w) = (size >= 0 ? exp : -exp);
+ size = ABS (size);
+
+ if (exp > size)
+ {
+ /* pad with low zeros to get a total "exp" many limbs */
+ mp_size_t zeros = exp - size;
+ MPN_ZERO (wp, zeros);
+ wp += zeros;
+ }
+ else
+ {
+ /* exp<=size, trucate to the high "exp" many limbs */
+ up += (size - exp);
+ size = exp;
+ }
+
+ MPN_COPY (wp, up, size);
+}