1 files changed, 91 insertions, 0 deletions
diff --git a/Build/source/libs/mpfr/mpfr-src/src/set_ui_2exp.c b/Build/source/libs/mpfr/mpfr-src/src/set_ui_2exp.c
new file mode 100644
index 00000000000..fa72613abb5
--- /dev/null
+++ b/Build/source/libs/mpfr/mpfr-src/src/set_ui_2exp.c
@@ -0,0 +1,91 @@
+/* mpfr_set_ui_2exp -- set a MPFR number from a machine unsigned integer with
+   a shift
+
+Copyright 2004, 2006-2020 Free Software Foundation, Inc.
+Contributed by the AriC and Caramba projects, INRIA.
+
+This file is part of the GNU MPFR Library.
+
+The GNU MPFR 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 MPFR 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 MPFR Library; see the file COPYING.LESSER.  If not, see
+https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
+51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+#define MPFR_NEED_LONGLONG_H
+#include "mpfr-impl.h"
+
+MPFR_HOT_FUNCTION_ATTR int
+mpfr_set_ui_2exp (mpfr_ptr x, unsigned long i, mpfr_exp_t e, mpfr_rnd_t rnd_mode)
+{
+  MPFR_SET_POS (x);
+
+  if (MPFR_UNLIKELY (i == 0))
+    {
+      MPFR_SET_ZERO (x);
+      MPFR_RET (0);
+    }
+  else
+    {
+#ifdef MPFR_LONG_WITHIN_LIMB
+      mp_size_t xn;
+      int cnt, nbits;
+      mp_limb_t *xp;
+      int inex = 0;
+
+      /* Early underflow/overflow checking is necessary to avoid
+         integer overflow or errors due to special exponent values. */
+      if (MPFR_UNLIKELY (e < __gmpfr_emin - (mpfr_exp_t)
+                         (sizeof (unsigned long) * CHAR_BIT + 1)))
+        return mpfr_underflow (x, rnd_mode == MPFR_RNDN ?
+                               MPFR_RNDZ : rnd_mode, i < 0 ? -1 : 1);
+      if (MPFR_UNLIKELY (e >= __gmpfr_emax))
+        return mpfr_overflow (x, rnd_mode, i < 0 ? -1 : 1);
+
+      MPFR_ASSERTD (i == (mp_limb_t) i);
+
+      /* Position of the highest limb */
+      xn = (MPFR_PREC (x) - 1) / GMP_NUMB_BITS;
+      count_leading_zeros (cnt, (mp_limb_t) i);
+      MPFR_ASSERTD (cnt < GMP_NUMB_BITS);  /* OK since i != 0 */
+
+      xp = MPFR_MANT(x);
+      xp[xn] = ((mp_limb_t) i) << cnt;
+      /* Zero the xn lower limbs. */
+      MPN_ZERO(xp, xn);
+
+      nbits = GMP_NUMB_BITS - cnt;
+      e += nbits;  /* exponent _before_ the rounding */
+
+      /* round if MPFR_PREC(x) smaller than length of i */
+      if (MPFR_UNLIKELY (MPFR_PREC (x) < nbits) &&
+          MPFR_UNLIKELY (mpfr_round_raw (xp + xn, xp + xn, nbits, 0,
+                                         MPFR_PREC (x), rnd_mode, &inex)))
+        {
+          e++;
+          xp[xn] = MPFR_LIMB_HIGHBIT;
+        }
+
+      MPFR_EXP (x) = e;
+      return mpfr_check_range (x, inex, rnd_mode);
+#else
+      /* if a long does not fit into a limb, we use mpfr_set_z_2exp */
+      mpz_t z;
+      int inex;
+
+      mpz_init_set_ui (z, i);
+      inex = mpfr_set_z_2exp (x, z, e, rnd_mode);
+      mpz_clear (z);
+      return inex;
+#endif
+    }
+}