summaryrefslogtreecommitdiffstats
path: root/contrib/libgmp/mpf/div_ui.c
diff options
context:
space:
mode:
Diffstat (limited to 'contrib/libgmp/mpf/div_ui.c')
-rw-r--r--contrib/libgmp/mpf/div_ui.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/contrib/libgmp/mpf/div_ui.c b/contrib/libgmp/mpf/div_ui.c
new file mode 100644
index 0000000..050a6f0
--- /dev/null
+++ b/contrib/libgmp/mpf/div_ui.c
@@ -0,0 +1,91 @@
+/* mpf_div_ui -- Divide a float with an unsigned integer.
+
+Copyright (C) 1993, 1994, 1996 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library.
+
+The GNU MP Library is free software; you can redistribute it and/or modify
+it under the terms of the GNU Library General Public License as published by
+the Free Software Foundation; either version 2 of the License, or (at your
+option) any later version.
+
+The GNU MP 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 Library General Public
+License for more details.
+
+You should have received a copy of the GNU Library General Public License
+along with the GNU MP Library; see the file COPYING.LIB. If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+MA 02111-1307, USA. */
+
+#include "gmp.h"
+#include "gmp-impl.h"
+#include "longlong.h"
+
+void
+#if __STDC__
+mpf_div_ui (mpf_ptr r, mpf_srcptr u, unsigned long int v)
+#else
+mpf_div_ui (r, u, v)
+ mpf_ptr r;
+ mpf_srcptr u;
+ unsigned long int v;
+#endif
+{
+ mp_srcptr up;
+ mp_ptr rp, tp, rtp;
+ mp_size_t usize;
+ mp_size_t rsize, tsize;
+ mp_size_t sign_quotient;
+ mp_size_t prec;
+ mp_limb_t q_limb;
+ mp_exp_t rexp;
+ TMP_DECL (marker);
+
+ usize = u->_mp_size;
+ sign_quotient = usize;
+ usize = ABS (usize);
+ prec = r->_mp_prec;
+
+ if (v == 0)
+ v = 1 / v; /* divide by zero as directed */
+ if (usize == 0)
+ {
+ r->_mp_size = 0;
+ r->_mp_exp = 0;
+ return;
+ }
+
+ TMP_MARK (marker);
+
+ rp = r->_mp_d;
+ up = u->_mp_d;
+
+ tsize = 1 + prec;
+ tp = (mp_ptr) TMP_ALLOC ((tsize + 1) * BYTES_PER_MP_LIMB);
+
+ if (usize > tsize)
+ {
+ up += usize - tsize;
+ usize = tsize;
+ rtp = tp;
+ }
+ else
+ {
+ MPN_ZERO (tp, tsize - usize);
+ rtp = tp + (tsize - usize);
+ }
+
+ /* Move the dividend to the remainder. */
+ MPN_COPY (rtp, up, usize);
+
+ mpn_divmod_1 (rp, tp, tsize, (mp_limb_t) v);
+ q_limb = rp[tsize - 1];
+
+ rsize = tsize - (q_limb == 0);
+ rexp = u->_mp_exp - (q_limb == 0);
+ r->_mp_size = sign_quotient >= 0 ? rsize : -rsize;
+ r->_mp_exp = rexp;
+ TMP_FREE (marker);
+}
OpenPOWER on IntegriCloud