[project @ 2004-08-31 12:45:35 by simonmar]

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

diff --git a/ghc/rts/gmp/mpz/tdiv_r.c b/ghc/rts/gmp/mpz/tdiv_r.c
index 813a0d4..9eb87df 100644 (file)
--- a/ghc/rts/gmp/mpz/tdiv_r.c
+++ b/ghc/rts/gmp/mpz/tdiv_r.c
@@ -1,20 +1,20 @@
 /* mpz_tdiv_r(rem, dividend, divisor) -- Set REM to DIVIDEND mod DIVISOR.
 
-Copyright (C) 1991, 1993, 1994 Free Software Foundation, Inc.
+Copyright (C) 1991, 1993, 1994, 2000 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
+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 Library General Public
+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 Library General Public License
+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. */
@@ -32,6 +32,67 @@ mpz_tdiv_r (rem, num, den)
      mpz_srcptr num;
      mpz_srcptr den;
 #endif
+{
+  mp_size_t ql;
+  mp_size_t ns, ds, nl, dl;
+  mp_ptr np, dp, qp, rp;
+  TMP_DECL (marker);
 
-#undef COMPUTE_QUOTIENT
-#include "dmincl.c"
+  ns = SIZ (num);
+  ds = SIZ (den);
+  nl = ABS (ns);
+  dl = ABS (ds);
+  ql = nl - dl + 1;
+
+  if (dl == 0)
+    DIVIDE_BY_ZERO;
+
+  MPZ_REALLOC (rem, dl);
+
+  if (ql <= 0)
+    {
+      if (num != rem)
+       {
+         mp_ptr np, rp;
+         np = PTR (num);
+         rp = PTR (rem);
+         MPN_COPY (rp, np, nl);
+         SIZ (rem) = SIZ (num);
+       }
+      return;
+    }
+
+  TMP_MARK (marker);
+  qp = (mp_ptr) TMP_ALLOC (ql * BYTES_PER_MP_LIMB);
+  rp = PTR (rem);
+  np = PTR (num);
+  dp = PTR (den);
+
+  /* FIXME: We should think about how to handle the temporary allocation.
+     Perhaps mpn_tdiv_qr should handle it, since it anyway often needs to
+     allocate temp space.  */
+
+  /* Copy denominator to temporary space if it overlaps with the remainder.  */
+  if (dp == rp)
+    {
+      mp_ptr tp;
+      tp = (mp_ptr) TMP_ALLOC (dl * BYTES_PER_MP_LIMB);
+      MPN_COPY (tp, dp, dl);
+      dp = tp;
+    }
+  /* Copy numerator to temporary space if it overlaps with the remainder.  */
+  if (np == rp)
+    {
+      mp_ptr tp;
+      tp = (mp_ptr) TMP_ALLOC (nl * BYTES_PER_MP_LIMB);
+      MPN_COPY (tp, np, nl);
+      np = tp;
+    }
+
+  mpn_tdiv_qr (qp, rp, 0L, np, nl, dp, dl);
+
+  MPN_NORMALIZE (rp, dl);
+
+  SIZ (rem) = ns >= 0 ? dl : -dl;
+  TMP_FREE (marker);
+}