[project @ 1998-06-05 14:37:59 by simonm]

[ghc-hetmet.git] / ghc / rts / gmp / mpz / cdiv_r_ui.c

diff --git a/ghc/rts/gmp/mpz/cdiv_r_ui.c b/ghc/rts/gmp/mpz/cdiv_r_ui.c
new file mode 100644 (file)
index 0000000..757a3f5
--- /dev/null
+++ b/ghc/rts/gmp/mpz/cdiv_r_ui.c
@@ -0,0 +1,54 @@
+/* mpz_cdiv_r_ui -- Division rounding the quotient towards +infinity.  The
+   remainder gets the opposite sign as the denominator.  In order to make it
+   always fit into the return type, the negative of the true remainder is
+   returned.
+
+Copyright (C) 1994, 1995, 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"
+
+unsigned long int
+#if __STDC__
+mpz_cdiv_r_ui (mpz_ptr rem, mpz_srcptr dividend, unsigned long int divisor)
+#else
+mpz_cdiv_r_ui (rem, dividend, divisor)
+     mpz_ptr rem;
+     mpz_srcptr dividend;
+     unsigned long int divisor;
+#endif
+{
+  mp_size_t dividend_size;
+  mp_size_t size;
+  mp_limb_t remainder_limb;
+
+  dividend_size = dividend->_mp_size;
+  size = ABS (dividend_size);
+
+  remainder_limb = mpn_mod_1 (dividend->_mp_d, size, (mp_limb_t) divisor);
+
+  if (remainder_limb != 0 && dividend_size >= 0)
+    remainder_limb = divisor - remainder_limb;
+
+  rem->_mp_d[0] = remainder_limb;
+  rem->_mp_size = -(remainder_limb != 0);
+
+  return remainder_limb;
+}