Update the in-tree GMP; fixes trac #832

[ghc-hetmet.git] / rts / gmp / mpz / fdiv_q_2exp.c

diff --git a/rts/gmp/mpz/fdiv_q_2exp.c b/rts/gmp/mpz/fdiv_q_2exp.c
deleted file mode 100644 (file)
index 8e02180..0000000
--- a/rts/gmp/mpz/fdiv_q_2exp.c
+++ /dev/null
@@ -1,104 +0,0 @@
-/* mpz_fdiv_q_2exp -- Divide an integer by 2**CNT.  Round the quotient
-   towards -infinity.
-
-Copyright (C) 1991, 1993, 1994, 1996, 1998, 1999 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"
-
-void
-#if __STDC__
-mpz_fdiv_q_2exp (mpz_ptr w, mpz_srcptr u, unsigned long int cnt)
-#else
-mpz_fdiv_q_2exp (w, u, cnt)
-     mpz_ptr w;
-     mpz_srcptr u;
-     unsigned long int cnt;
-#endif
-{
-  mp_size_t usize = u->_mp_size;
-  mp_size_t wsize;
-  mp_size_t abs_usize = ABS (usize);
-  mp_size_t limb_cnt;
-  mp_ptr wp;
-  mp_limb_t round = 0;
-
-  limb_cnt = cnt / BITS_PER_MP_LIMB;
-  wsize = abs_usize - limb_cnt;
-  if (wsize <= 0)
-    {
-      wp = w->_mp_d;
-      wsize = 0;
-      /* Set ROUND since we know we skip some non-zero words in this case.
-        Well, if U is zero, we don't, but then this will be taken care of
-        below, since rounding only really takes place for negative U.  */
-      round = 1;
-      wp[0] = 1;
-      w->_mp_size = -(usize < 0);
-      return;
-    }
-  else
-    {
-      mp_size_t i;
-      mp_ptr up;
-
-      /* Make sure there is enough space.  We make an extra limb
-        here to account for possible rounding at the end.  */
-      if (w->_mp_alloc < wsize + 1)
-       _mpz_realloc (w, wsize + 1);
-
-      wp = w->_mp_d;
-      up = u->_mp_d;
-
-      /* Set ROUND if we are about skip some non-zero limbs.  */
-      for (i = 0; i < limb_cnt && round == 0; i++)
-       round = up[i];
-
-      cnt %= BITS_PER_MP_LIMB;
-      if (cnt != 0)
-       {
-         round |= mpn_rshift (wp, up + limb_cnt, wsize, cnt);
-         wsize -= wp[wsize - 1] == 0;
-       }
-      else
-       {
-         MPN_COPY_INCR (wp, up + limb_cnt, wsize);
-       }
-    }
-
-  if (usize < 0 && round != 0)
-    {
-      mp_limb_t cy;
-      if (wsize != 0)
-       {
-         cy = mpn_add_1 (wp, wp, wsize, (mp_limb_t) 1);
-         wp[wsize] = cy;
-         wsize += cy;
-       }
-      else
-       {
-         /* We shifted something negative to zero.  The result is -1.  */
-         wp[0] = 1;
-         wsize = 1;
-       }
-    }
-  w->_mp_size = usize >= 0 ? wsize : -wsize;
-}