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-rw-r--r--Build/source/libs/mpfr/mpfr-3.1.2/src/ui_sub.c68
1 files changed, 68 insertions, 0 deletions
diff --git a/Build/source/libs/mpfr/mpfr-3.1.2/src/ui_sub.c b/Build/source/libs/mpfr/mpfr-3.1.2/src/ui_sub.c
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index 00000000000..0b3911b05a1
--- /dev/null
+++ b/Build/source/libs/mpfr/mpfr-3.1.2/src/ui_sub.c
@@ -0,0 +1,68 @@
+/* mpfr_ui_sub -- subtract a floating-point number from an integer
+
+Copyright 2000, 2001, 2002, 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. */
+
+#define MPFR_NEED_LONGLONG_H
+#include "mpfr-impl.h"
+
+int
+mpfr_ui_sub (mpfr_ptr y, unsigned long int u, mpfr_srcptr x, mpfr_rnd_t rnd_mode)
+{
+ mpfr_t uu;
+ mp_limb_t up[1];
+ unsigned long cnt;
+
+ MPFR_LOG_FUNC
+ (("u=%lu x[%Pu]=%.*Rg rnd=%d",
+ u, mpfr_get_prec(x), mpfr_log_prec, x, rnd_mode),
+ ("y[%Pu]=%.*Rg", mpfr_get_prec(y), mpfr_log_prec, y));
+
+ if (MPFR_UNLIKELY (u == 0))
+ return mpfr_neg (y, x, rnd_mode);
+
+ if (MPFR_UNLIKELY(MPFR_IS_SINGULAR(x)))
+ {
+ if (MPFR_IS_NAN(x))
+ {
+ MPFR_SET_NAN(y);
+ MPFR_RET_NAN;
+ }
+ else if (MPFR_IS_INF(x))
+ {
+ /* u - Inf = -Inf and u - -Inf = +Inf */
+ MPFR_SET_INF(y);
+ MPFR_SET_OPPOSITE_SIGN(y,x);
+ MPFR_RET(0); /* +/-infinity is exact */
+ }
+ else /* x is zero */
+ /* u - 0 = u */
+ return mpfr_set_ui(y, u, rnd_mode);
+ }
+ else
+ {
+ MPFR_TMP_INIT1 (up, uu, GMP_NUMB_BITS);
+ MPFR_ASSERTN(u == (mp_limb_t) u);
+ count_leading_zeros (cnt, (mp_limb_t) u);
+ *up = (mp_limb_t) u << cnt;
+ MPFR_SET_EXP (uu, GMP_NUMB_BITS - cnt);
+ return mpfr_sub (y, uu, x, rnd_mode);
+ }
+}