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Diffstat (limited to 'Build/source/libs/mpfr/mpfr-3.1.2/src/cmp.c')
-rw-r--r--Build/source/libs/mpfr/mpfr-3.1.2/src/cmp.c104
1 files changed, 104 insertions, 0 deletions
diff --git a/Build/source/libs/mpfr/mpfr-3.1.2/src/cmp.c b/Build/source/libs/mpfr/mpfr-3.1.2/src/cmp.c
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index 00000000000..d6a426827f1
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+++ b/Build/source/libs/mpfr/mpfr-3.1.2/src/cmp.c
@@ -0,0 +1,104 @@
+/* mpfr_cmp -- compare two floating-point numbers
+
+Copyright 1999, 2001, 2003, 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"
+
+/* returns 0 iff b = sign(s) * c
+ a positive value iff b > sign(s) * c
+ a negative value iff b < sign(s) * c
+ returns 0 and sets erange flag if b and/or c is NaN.
+*/
+
+int
+mpfr_cmp3 (mpfr_srcptr b, mpfr_srcptr c, int s)
+{
+ mpfr_exp_t be, ce;
+ mp_size_t bn, cn;
+ mp_limb_t *bp, *cp;
+
+ s = MPFR_MULT_SIGN( s , MPFR_SIGN(c) );
+
+ if (MPFR_ARE_SINGULAR(b, c))
+ {
+ if (MPFR_IS_NAN (b) || MPFR_IS_NAN (c))
+ {
+ MPFR_SET_ERANGE ();
+ return 0;
+ }
+ else if (MPFR_IS_INF(b))
+ {
+ if (MPFR_IS_INF(c) && s == MPFR_SIGN(b) )
+ return 0;
+ else
+ return MPFR_SIGN(b);
+ }
+ else if (MPFR_IS_INF(c))
+ return -s;
+ else if (MPFR_IS_ZERO(b))
+ return MPFR_IS_ZERO(c) ? 0 : -s;
+ else /* necessarily c=0 */
+ return MPFR_SIGN(b);
+ }
+ /* b and c are real numbers */
+ if (s != MPFR_SIGN(b))
+ return MPFR_SIGN(b);
+
+ /* now signs are equal */
+
+ be = MPFR_GET_EXP (b);
+ ce = MPFR_GET_EXP (c);
+ if (be > ce)
+ return s;
+ if (be < ce)
+ return -s;
+
+ /* both signs and exponents are equal */
+
+ bn = (MPFR_PREC(b)-1)/GMP_NUMB_BITS;
+ cn = (MPFR_PREC(c)-1)/GMP_NUMB_BITS;
+
+ bp = MPFR_MANT(b);
+ cp = MPFR_MANT(c);
+
+ for ( ; bn >= 0 && cn >= 0; bn--, cn--)
+ {
+ if (bp[bn] > cp[cn])
+ return s;
+ if (bp[bn] < cp[cn])
+ return -s;
+ }
+ for ( ; bn >= 0; bn--)
+ if (bp[bn])
+ return s;
+ for ( ; cn >= 0; cn--)
+ if (cp[cn])
+ return -s;
+
+ return 0;
+}
+
+#undef mpfr_cmp
+int
+mpfr_cmp (mpfr_srcptr b, mpfr_srcptr c)
+{
+ return mpfr_cmp3 (b, c, 1);
+}