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Diffstat (limited to 'Build/source/libs/mpfr/mpfr-3.1.3/src/add.c')
-rw-r--r--Build/source/libs/mpfr/mpfr-3.1.3/src/add.c111
1 files changed, 111 insertions, 0 deletions
diff --git a/Build/source/libs/mpfr/mpfr-3.1.3/src/add.c b/Build/source/libs/mpfr/mpfr-3.1.3/src/add.c
new file mode 100644
index 00000000000..c70981d9dfd
--- /dev/null
+++ b/Build/source/libs/mpfr/mpfr-3.1.3/src/add.c
@@ -0,0 +1,111 @@
+/* mpfr_add -- add two floating-point numbers
+
+Copyright 1999-2004, 2006-2015 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_add (mpfr_ptr a, mpfr_srcptr b, mpfr_srcptr c, mpfr_rnd_t rnd_mode)
+{
+ MPFR_LOG_FUNC
+ (("b[%Pu]=%.*Rg c[%Pu]=%.*Rg rnd=%d",
+ mpfr_get_prec (b), mpfr_log_prec, b,
+ mpfr_get_prec (c), mpfr_log_prec, c, rnd_mode),
+ ("a[%Pu]=%.*Rg", mpfr_get_prec (a), mpfr_log_prec, a));
+
+ if (MPFR_ARE_SINGULAR(b,c))
+ {
+ if (MPFR_IS_NAN(b) || MPFR_IS_NAN(c))
+ {
+ MPFR_SET_NAN(a);
+ MPFR_RET_NAN;
+ }
+ /* neither b nor c is NaN here */
+ else if (MPFR_IS_INF(b))
+ {
+ if (!MPFR_IS_INF(c) || MPFR_SIGN(b) == MPFR_SIGN(c))
+ {
+ MPFR_SET_INF(a);
+ MPFR_SET_SAME_SIGN(a, b);
+ MPFR_RET(0); /* exact */
+ }
+ else
+ {
+ MPFR_SET_NAN(a);
+ MPFR_RET_NAN;
+ }
+ }
+ else if (MPFR_IS_INF(c))
+ {
+ MPFR_SET_INF(a);
+ MPFR_SET_SAME_SIGN(a, c);
+ MPFR_RET(0); /* exact */
+ }
+ /* now either b or c is zero */
+ else if (MPFR_IS_ZERO(b))
+ {
+ if (MPFR_IS_ZERO(c))
+ {
+ /* for round away, we take the same convention for 0 + 0
+ as for round to zero or to nearest: it always gives +0,
+ except (-0) + (-0) = -0. */
+ MPFR_SET_SIGN(a,
+ (rnd_mode != MPFR_RNDD ?
+ ((MPFR_IS_NEG(b) && MPFR_IS_NEG(c)) ? -1 : 1) :
+ ((MPFR_IS_POS(b) && MPFR_IS_POS(c)) ? 1 : -1)));
+ MPFR_SET_ZERO(a);
+ MPFR_RET(0); /* 0 + 0 is exact */
+ }
+ return mpfr_set (a, c, rnd_mode);
+ }
+ else
+ {
+ MPFR_ASSERTD(MPFR_IS_ZERO(c));
+ return mpfr_set (a, b, rnd_mode);
+ }
+ }
+
+ MPFR_ASSERTD (MPFR_IS_PURE_FP (b));
+ MPFR_ASSERTD (MPFR_IS_PURE_FP (c));
+
+ if (MPFR_UNLIKELY(MPFR_SIGN(b) != MPFR_SIGN(c)))
+ { /* signs differ, it is a subtraction */
+ if (MPFR_LIKELY(MPFR_PREC(a) == MPFR_PREC(b)
+ && MPFR_PREC(b) == MPFR_PREC(c)))
+ return mpfr_sub1sp(a, b, c, rnd_mode);
+ else
+ return mpfr_sub1(a, b, c, rnd_mode);
+ }
+ else
+ { /* signs are equal, it's an addition */
+ if (MPFR_LIKELY(MPFR_PREC(a) == MPFR_PREC(b)
+ && MPFR_PREC(b) == MPFR_PREC(c)))
+ if (MPFR_GET_EXP(b) < MPFR_GET_EXP(c))
+ return mpfr_add1sp(a, c, b, rnd_mode);
+ else
+ return mpfr_add1sp(a, b, c, rnd_mode);
+ else
+ if (MPFR_GET_EXP(b) < MPFR_GET_EXP(c))
+ return mpfr_add1(a, c, b, rnd_mode);
+ else
+ return mpfr_add1(a, b, c, rnd_mode);
+ }
+}