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-rw-r--r--Build/source/libs/mpfr/mpfr-3.1.2/src/cmp_ui.c101
1 files changed, 101 insertions, 0 deletions
diff --git a/Build/source/libs/mpfr/mpfr-3.1.2/src/cmp_ui.c b/Build/source/libs/mpfr/mpfr-3.1.2/src/cmp_ui.c
new file mode 100644
index 00000000000..1e094abbf66
--- /dev/null
+++ b/Build/source/libs/mpfr/mpfr-3.1.2/src/cmp_ui.c
@@ -0,0 +1,101 @@
+/* mpfr_cmp_ui_2exp -- compare a floating-point number with an unsigned
+machine integer multiplied by a power of 2
+
+Copyright 1999, 2001, 2002, 2003, 2004, 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. */
+
+#define MPFR_NEED_LONGLONG_H
+#include "mpfr-impl.h"
+
+/* returns a positive value if b > i*2^f,
+ a negative value if b < i*2^f,
+ zero if b = i*2^f.
+ b must not be NaN
+*/
+
+int
+mpfr_cmp_ui_2exp (mpfr_srcptr b, unsigned long int i, mpfr_exp_t f)
+{
+ if (MPFR_UNLIKELY( MPFR_IS_SINGULAR(b) ))
+ {
+ if (MPFR_IS_NAN (b))
+ {
+ MPFR_SET_ERANGE ();
+ return 0;
+ }
+ else if (MPFR_IS_INF(b))
+ return MPFR_INT_SIGN (b);
+ else /* since b cannot be NaN, b=0 here */
+ return i != 0 ? -1 : 0;
+ }
+
+ if (MPFR_IS_NEG (b))
+ return -1;
+ /* now b > 0 */
+ else if (MPFR_UNLIKELY(i == 0))
+ return 1;
+ else /* b > 0, i > 0 */
+ {
+ mpfr_exp_t e;
+ int k;
+ mp_size_t bn;
+ mp_limb_t c, *bp;
+
+ /* i must be representable in a mp_limb_t */
+ MPFR_ASSERTN(i == (mp_limb_t) i);
+
+ e = MPFR_GET_EXP (b); /* 2^(e-1) <= b < 2^e */
+ if (e <= f)
+ return -1;
+ if (f < MPFR_EMAX_MAX - GMP_NUMB_BITS &&
+ e > f + GMP_NUMB_BITS)
+ return 1;
+
+ /* now f < e <= f + GMP_NUMB_BITS */
+ c = (mp_limb_t) i;
+ count_leading_zeros(k, c);
+ if ((int) (e - f) > GMP_NUMB_BITS - k)
+ return 1;
+ if ((int) (e - f) < GMP_NUMB_BITS - k)
+ return -1;
+
+ /* now b and i*2^f have the same exponent */
+ c <<= k;
+ bn = (MPFR_PREC(b) - 1) / GMP_NUMB_BITS;
+ bp = MPFR_MANT(b);
+ if (bp[bn] > c)
+ return 1;
+ if (bp[bn] < c)
+ return -1;
+
+ /* most significant limbs agree, check remaining limbs from b */
+ while (bn > 0)
+ if (bp[--bn] != 0)
+ return 1;
+ return 0;
+ }
+}
+
+#undef mpfr_cmp_ui
+int
+mpfr_cmp_ui (mpfr_srcptr b, unsigned long int i)
+{
+ return mpfr_cmp_ui_2exp (b, i, 0);
+}