Reorganisation of the source tree

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

diff --git a/rts/gmp/mpz/fdiv_r_ui.c b/rts/gmp/mpz/fdiv_r_ui.c
new file mode 100644 (file)
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+++ b/rts/gmp/mpz/fdiv_r_ui.c
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+/* mpz_fdiv_r_ui -- Division rounding the quotient towards -infinity.
+   The remainder gets the same sign as the denominator.
+
+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 Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 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 Lesser General Public
+License for more details.
+
+You should have received a copy of the GNU Lesser 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_fdiv_r_ui (mpz_ptr rem, mpz_srcptr dividend, unsigned long int divisor)
+#else
+mpz_fdiv_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;
+
+  if (divisor == 0)
+    DIVIDE_BY_ZERO;
+
+  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;
+}