1 files changed, 112 insertions, 0 deletions
diff --git a/Build/source/libs/mpfr/mpfr-3.1.2/src/sqr.c b/Build/source/libs/mpfr/mpfr-3.1.2/src/sqr.c
new file mode 100644
index 00000000000..a3748b56127
--- /dev/null
+++ b/Build/source/libs/mpfr/mpfr-3.1.2/src/sqr.c
@@ -0,0 +1,112 @@
+/* mpfr_sqr -- Floating square
+
+Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
+Contributed by the AriC and Caramel 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
+http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
+51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+#include "mpfr-impl.h"
+
+int
+mpfr_sqr (mpfr_ptr a, mpfr_srcptr b, mpfr_rnd_t rnd_mode)
+{
+  int cc, inexact;
+  mpfr_exp_t ax;
+  mp_limb_t *tmp;
+  mp_limb_t b1;
+  mpfr_prec_t bq;
+  mp_size_t bn, tn;
+  MPFR_TMP_DECL(marker);
+
+  MPFR_LOG_FUNC
+    (("x[%Pu]=%.*Rg rnd=%d", mpfr_get_prec (b), mpfr_log_prec, b, rnd_mode),
+     ("y[%Pu]=%.*Rg inexact=%d",
+      mpfr_get_prec (a), mpfr_log_prec, a, inexact));
+
+  /* deal with special cases */
+  if (MPFR_UNLIKELY(MPFR_IS_SINGULAR(b)))
+    {
+      if (MPFR_IS_NAN(b))
+        {
+          MPFR_SET_NAN(a);
+          MPFR_RET_NAN;
+        }
+      MPFR_SET_POS (a);
+      if (MPFR_IS_INF(b))
+        MPFR_SET_INF(a);
+      else
+        ( MPFR_ASSERTD(MPFR_IS_ZERO(b)), MPFR_SET_ZERO(a) );
+      MPFR_RET(0);
+    }
+  ax = 2 * MPFR_GET_EXP (b);
+  bq = MPFR_PREC(b);
+
+  MPFR_ASSERTN (2 * (mpfr_uprec_t) bq <= MPFR_PREC_MAX);
+
+  bn = MPFR_LIMB_SIZE (b); /* number of limbs of b */
+  tn = MPFR_PREC2LIMBS (2 * bq); /* number of limbs of square,
+                                    2*bn or 2*bn-1 */
+
+  if (MPFR_UNLIKELY(bn > MPFR_SQR_THRESHOLD))
+    return mpfr_mul (a, b, b, rnd_mode);
+
+  MPFR_TMP_MARK(marker);
+  tmp = MPFR_TMP_LIMBS_ALLOC (2 * bn);
+
+  /* Multiplies the mantissa in temporary allocated space */
+  mpn_sqr_n (tmp, MPFR_MANT(b), bn);
+  b1 = tmp[2 * bn - 1];
+
+  /* now tmp[0]..tmp[2*bn-1] contains the product of both mantissa,
+     with tmp[2*bn-1]>=2^(GMP_NUMB_BITS-2) */
+  b1 >>= GMP_NUMB_BITS - 1; /* msb from the product */
+
+  /* if the mantissas of b and c are uniformly distributed in ]1/2, 1],
+     then their product is in ]1/4, 1/2] with probability 2*ln(2)-1 ~ 0.386
+     and in [1/2, 1] with probability 2-2*ln(2) ~ 0.614 */
+  tmp += 2 * bn - tn; /* +0 or +1 */
+  if (MPFR_UNLIKELY(b1 == 0))
+    mpn_lshift (tmp, tmp, tn, 1); /* tn <= k, so no stack corruption */
+
+  cc = mpfr_round_raw (MPFR_MANT (a), tmp, 2 * bq, 0,
+                       MPFR_PREC (a), rnd_mode, &inexact);
+  /* cc = 1 ==> result is a power of two */
+  if (MPFR_UNLIKELY(cc))
+    MPFR_MANT(a)[MPFR_LIMB_SIZE(a)-1] = MPFR_LIMB_HIGHBIT;
+
+  MPFR_TMP_FREE(marker);
+  {
+    mpfr_exp_t ax2 = ax + (mpfr_exp_t) (b1 - 1 + cc);
+    if (MPFR_UNLIKELY( ax2 > __gmpfr_emax))
+      return mpfr_overflow (a, rnd_mode, MPFR_SIGN_POS);
+    if (MPFR_UNLIKELY( ax2 < __gmpfr_emin))
+      {
+        /* In the rounding to the nearest mode, if the exponent of the exact
+           result (i.e. before rounding, i.e. without taking cc into account)
+           is < __gmpfr_emin - 1 or the exact result is a power of 2 (i.e. if
+           both arguments are powers of 2), then round to zero. */
+        if (rnd_mode == MPFR_RNDN &&
+            (ax + (mpfr_exp_t) b1 < __gmpfr_emin || mpfr_powerof2_raw (b)))
+          rnd_mode = MPFR_RNDZ;
+        return mpfr_underflow (a, rnd_mode, MPFR_SIGN_POS);
+      }
+    MPFR_SET_EXP (a, ax2);
+    MPFR_SET_POS (a);
+  }
+  MPFR_RET (inexact);
+}