1 files changed, 358 insertions, 358 deletions
diff --git a/libgcrypt-1.4.6/mpi/mpi-div.c b/libgcrypt-1.4.6/mpi/mpi-div.c
index 0d8a2d1..e94e531 100644
--- a/libgcrypt-1.4.6/mpi/mpi-div.c
+++ b/libgcrypt-1.4.6/mpi/mpi-div.c
@@ -1,358 +1,358 @@
-/* mpi-div.c  -  MPI functions
- * Copyright (C) 1994, 1996, 1998, 2001, 2002,
- *               2003 Free Software Foundation, Inc.
- *
- * This file is part of Libgcrypt.
- *
- * Libgcrypt 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.
- *
- * Libgcrypt 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 this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
- *
- * Note: This code is heavily based on the GNU MP Library.
- *	 Actually it's the same code with only minor changes in the
- *	 way the data is stored; this is to support the abstraction
- *	 of an optional secure memory allocation which may be used
- *	 to avoid revealing of sensitive data due to paging etc.
- */
-
-#include <config.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include "mpi-internal.h"
-#include "longlong.h"
-#include "g10lib.h"
-
-
-void
-_gcry_mpi_fdiv_r( gcry_mpi_t rem, gcry_mpi_t dividend, gcry_mpi_t divisor )
-{
-    int divisor_sign = divisor->sign;
-    gcry_mpi_t temp_divisor = NULL;
-
-    /* We need the original value of the divisor after the remainder has been
-     * preliminary calculated.	We have to copy it to temporary space if it's
-     * the same variable as REM.  */
-    if( rem == divisor ) {
-	temp_divisor = mpi_copy( divisor );
-	divisor = temp_divisor;
-    }
-
-    _gcry_mpi_tdiv_r( rem, dividend, divisor );
-
-    if( ((divisor_sign?1:0) ^ (dividend->sign?1:0)) && rem->nlimbs )
-	gcry_mpi_add( rem, rem, divisor);
-
-    if( temp_divisor )
-	mpi_free(temp_divisor);
-}
-
-
-
-/****************
- * Division rounding the quotient towards -infinity.
- * The remainder gets the same sign as the denominator.
- * rem is optional
- */
-
-ulong
-_gcry_mpi_fdiv_r_ui( gcry_mpi_t rem, gcry_mpi_t dividend, ulong divisor )
-{
-    mpi_limb_t rlimb;
-
-    rlimb = _gcry_mpih_mod_1( dividend->d, dividend->nlimbs, divisor );
-    if( rlimb && dividend->sign )
-	rlimb = divisor - rlimb;
-
-    if( rem ) {
-	rem->d[0] = rlimb;
-	rem->nlimbs = rlimb? 1:0;
-    }
-    return rlimb;
-}
-
-
-void
-_gcry_mpi_fdiv_q( gcry_mpi_t quot, gcry_mpi_t dividend, gcry_mpi_t divisor )
-{
-    gcry_mpi_t tmp = mpi_alloc( mpi_get_nlimbs(quot) );
-    _gcry_mpi_fdiv_qr( quot, tmp, dividend, divisor);
-    mpi_free(tmp);
-}
-
-void
-_gcry_mpi_fdiv_qr( gcry_mpi_t quot, gcry_mpi_t rem, gcry_mpi_t dividend, gcry_mpi_t divisor )
-{
-    int divisor_sign = divisor->sign;
-    gcry_mpi_t temp_divisor = NULL;
-
-    if( quot == divisor || rem == divisor ) {
-	temp_divisor = mpi_copy( divisor );
-	divisor = temp_divisor;
-    }
-
-    _gcry_mpi_tdiv_qr( quot, rem, dividend, divisor );
-
-    if( (divisor_sign ^ dividend->sign) && rem->nlimbs ) {
-	gcry_mpi_sub_ui( quot, quot, 1 );
-	gcry_mpi_add( rem, rem, divisor);
-    }
-
-    if( temp_divisor )
-	mpi_free(temp_divisor);
-}
-
-
-/* If den == quot, den needs temporary storage.
- * If den == rem, den needs temporary storage.
- * If num == quot, num needs temporary storage.
- * If den has temporary storage, it can be normalized while being copied,
- *   i.e no extra storage should be allocated.
- */
-
-void
-_gcry_mpi_tdiv_r( gcry_mpi_t rem, gcry_mpi_t num, gcry_mpi_t den)
-{
-    _gcry_mpi_tdiv_qr(NULL, rem, num, den );
-}
-
-void
-_gcry_mpi_tdiv_qr( gcry_mpi_t quot, gcry_mpi_t rem, gcry_mpi_t num, gcry_mpi_t den)
-{
-    mpi_ptr_t np, dp;
-    mpi_ptr_t qp, rp;
-    mpi_size_t nsize = num->nlimbs;
-    mpi_size_t dsize = den->nlimbs;
-    mpi_size_t qsize, rsize;
-    mpi_size_t sign_remainder = num->sign;
-    mpi_size_t sign_quotient = num->sign ^ den->sign;
-    unsigned normalization_steps;
-    mpi_limb_t q_limb;
-    mpi_ptr_t marker[5];
-    unsigned int marker_nlimbs[5];
-    int markidx=0;
-
-    /* Ensure space is enough for quotient and remainder.
-     * We need space for an extra limb in the remainder, because it's
-     * up-shifted (normalized) below.  */
-    rsize = nsize + 1;
-    mpi_resize( rem, rsize);
-
-    qsize = rsize - dsize;	  /* qsize cannot be bigger than this.	*/
-    if( qsize <= 0 ) {
-	if( num != rem ) {
-	    rem->nlimbs = num->nlimbs;
-	    rem->sign = num->sign;
-	    MPN_COPY(rem->d, num->d, nsize);
-	}
-	if( quot ) {
-	    /* This needs to follow the assignment to rem, in case the
-	     * numerator and quotient are the same.  */
-	    quot->nlimbs = 0;
-	    quot->sign = 0;
-	}
-	return;
-    }
-
-    if( quot )
-	mpi_resize( quot, qsize);
-
-    /* Read pointers here, when reallocation is finished.  */
-    np = num->d;
-    dp = den->d;
-    rp = rem->d;
-
-    /* Optimize division by a single-limb divisor.  */
-    if( dsize == 1 ) {
-	mpi_limb_t rlimb;
-	if( quot ) {
-	    qp = quot->d;
-	    rlimb = _gcry_mpih_divmod_1( qp, np, nsize, dp[0] );
-	    qsize -= qp[qsize - 1] == 0;
-	    quot->nlimbs = qsize;
-	    quot->sign = sign_quotient;
-	}
-	else
-	    rlimb = _gcry_mpih_mod_1( np, nsize, dp[0] );
-	rp[0] = rlimb;
-	rsize = rlimb != 0?1:0;
-	rem->nlimbs = rsize;
-	rem->sign = sign_remainder;
-	return;
-    }
-
-
-    if( quot ) {
-	qp = quot->d;
-	/* Make sure QP and NP point to different objects.  Otherwise the
-	 * numerator would be gradually overwritten by the quotient limbs.  */
-	if(qp == np) { /* Copy NP object to temporary space.  */
-            marker_nlimbs[markidx] = nsize;
-	    np = marker[markidx++] = mpi_alloc_limb_space(nsize,
-							  mpi_is_secure(quot));
-	    MPN_COPY(np, qp, nsize);
-	}
-    }
-    else /* Put quotient at top of remainder. */
-	qp = rp + dsize;
-
-    count_leading_zeros( normalization_steps, dp[dsize - 1] );
-
-    /* Normalize the denominator, i.e. make its most significant bit set by
-     * shifting it NORMALIZATION_STEPS bits to the left.  Also shift the
-     * numerator the same number of steps (to keep the quotient the same!).
-     */
-    if( normalization_steps ) {
-	mpi_ptr_t tp;
-	mpi_limb_t nlimb;
-
-	/* Shift up the denominator setting the most significant bit of
-	 * the most significant word.  Use temporary storage not to clobber
-	 * the original contents of the denominator.  */
-        marker_nlimbs[markidx] = dsize;
-	tp = marker[markidx++] = mpi_alloc_limb_space(dsize,mpi_is_secure(den));
-	_gcry_mpih_lshift( tp, dp, dsize, normalization_steps );
-	dp = tp;
-
-	/* Shift up the numerator, possibly introducing a new most
-	 * significant word.  Move the shifted numerator in the remainder
-	 * meanwhile.  */
-	nlimb = _gcry_mpih_lshift(rp, np, nsize, normalization_steps);
-	if( nlimb ) {
-	    rp[nsize] = nlimb;
-	    rsize = nsize + 1;
-	}
-	else
-	    rsize = nsize;
-    }
-    else {
-	/* The denominator is already normalized, as required.	Copy it to
-	 * temporary space if it overlaps with the quotient or remainder.  */
-	if( dp == rp || (quot && (dp == qp))) {
-	    mpi_ptr_t tp;
-
-            marker_nlimbs[markidx] = dsize;
-	    tp = marker[markidx++] = mpi_alloc_limb_space(dsize,
-                                                          mpi_is_secure(den));
-	    MPN_COPY( tp, dp, dsize );
-	    dp = tp;
-	}
-
-	/* Move the numerator to the remainder.  */
-	if( rp != np )
-	    MPN_COPY(rp, np, nsize);
-
-	rsize = nsize;
-    }
-
-    q_limb = _gcry_mpih_divrem( qp, 0, rp, rsize, dp, dsize );
-
-    if( quot ) {
-	qsize = rsize - dsize;
-	if(q_limb) {
-	    qp[qsize] = q_limb;
-	    qsize += 1;
-	}
-
-	quot->nlimbs = qsize;
-	quot->sign = sign_quotient;
-    }
-
-    rsize = dsize;
-    MPN_NORMALIZE (rp, rsize);
-
-    if( normalization_steps && rsize ) {
-	_gcry_mpih_rshift(rp, rp, rsize, normalization_steps);
-	rsize -= rp[rsize - 1] == 0?1:0;
-    }
-
-    rem->nlimbs = rsize;
-    rem->sign	= sign_remainder;
-    while( markidx )
-      {
-        markidx--;
-	_gcry_mpi_free_limb_space (marker[markidx], marker_nlimbs[markidx]);
-      }
-}
-
-void
-_gcry_mpi_tdiv_q_2exp( gcry_mpi_t w, gcry_mpi_t u, unsigned int count )
-{
-    mpi_size_t usize, wsize;
-    mpi_size_t limb_cnt;
-
-    usize = u->nlimbs;
-    limb_cnt = count / BITS_PER_MPI_LIMB;
-    wsize = usize - limb_cnt;
-    if( limb_cnt >= usize )
-	w->nlimbs = 0;
-    else {
-	mpi_ptr_t wp;
-	mpi_ptr_t up;
-
-	RESIZE_IF_NEEDED( w, wsize );
-	wp = w->d;
-	up = u->d;
-
-	count %= BITS_PER_MPI_LIMB;
-	if( count ) {
-	    _gcry_mpih_rshift( wp, up + limb_cnt, wsize, count );
-	    wsize -= !wp[wsize - 1];
-	}
-	else {
-	    MPN_COPY_INCR( wp, up + limb_cnt, wsize);
-	}
-
-	w->nlimbs = wsize;
-    }
-}
-
-/****************
- * Check whether dividend is divisible by divisor
- * (note: divisor must fit into a limb)
- */
-int
-_gcry_mpi_divisible_ui(gcry_mpi_t dividend, ulong divisor )
-{
-    return !_gcry_mpih_mod_1( dividend->d, dividend->nlimbs, divisor );
-}
-
-
-void
-gcry_mpi_div (gcry_mpi_t quot, gcry_mpi_t rem, gcry_mpi_t dividend, gcry_mpi_t divisor, int round)
-{
-  if (!round)
-    {
-      if (!rem)
-        {
-          gcry_mpi_t tmp = mpi_alloc (mpi_get_nlimbs(quot));
-          _gcry_mpi_tdiv_qr (quot, tmp, dividend, divisor);
-          mpi_free (tmp);
-        }
-      else
-        _gcry_mpi_tdiv_qr (quot, rem, dividend, divisor);
-    }
-  else if (round < 0)
-    {
-      if (!rem)
-        _gcry_mpi_fdiv_q (quot, dividend, divisor);
-      else if (!quot)
-        _gcry_mpi_fdiv_r (rem, dividend, divisor);
-      else
-        _gcry_mpi_fdiv_qr (quot, rem, dividend, divisor);
-    }
-  else
-    log_bug ("mpi rounding to ceiling not yet implemented\n");
-}
-
-
-
+/* mpi-div.c  -  MPI functions
+ * Copyright (C) 1994, 1996, 1998, 2001, 2002,
+ *               2003 Free Software Foundation, Inc.
+ *
+ * This file is part of Libgcrypt.
+ *
+ * Libgcrypt 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.
+ *
+ * Libgcrypt 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ *
+ * Note: This code is heavily based on the GNU MP Library.
+ *	 Actually it's the same code with only minor changes in the
+ *	 way the data is stored; this is to support the abstraction
+ *	 of an optional secure memory allocation which may be used
+ *	 to avoid revealing of sensitive data due to paging etc.
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "mpi-internal.h"
+#include "longlong.h"
+#include "g10lib.h"
+
+
+void
+_gcry_mpi_fdiv_r( gcry_mpi_t rem, gcry_mpi_t dividend, gcry_mpi_t divisor )
+{
+    int divisor_sign = divisor->sign;
+    gcry_mpi_t temp_divisor = NULL;
+
+    /* We need the original value of the divisor after the remainder has been
+     * preliminary calculated.	We have to copy it to temporary space if it's
+     * the same variable as REM.  */
+    if( rem == divisor ) {
+	temp_divisor = mpi_copy( divisor );
+	divisor = temp_divisor;
+    }
+
+    _gcry_mpi_tdiv_r( rem, dividend, divisor );
+
+    if( ((divisor_sign?1:0) ^ (dividend->sign?1:0)) && rem->nlimbs )
+	gcry_mpi_add( rem, rem, divisor);
+
+    if( temp_divisor )
+	mpi_free(temp_divisor);
+}
+
+
+
+/****************
+ * Division rounding the quotient towards -infinity.
+ * The remainder gets the same sign as the denominator.
+ * rem is optional
+ */
+
+ulong
+_gcry_mpi_fdiv_r_ui( gcry_mpi_t rem, gcry_mpi_t dividend, ulong divisor )
+{
+    mpi_limb_t rlimb;
+
+    rlimb = _gcry_mpih_mod_1( dividend->d, dividend->nlimbs, divisor );
+    if( rlimb && dividend->sign )
+	rlimb = divisor - rlimb;
+
+    if( rem ) {
+	rem->d[0] = rlimb;
+	rem->nlimbs = rlimb? 1:0;
+    }
+    return rlimb;
+}
+
+
+void
+_gcry_mpi_fdiv_q( gcry_mpi_t quot, gcry_mpi_t dividend, gcry_mpi_t divisor )
+{
+    gcry_mpi_t tmp = mpi_alloc( mpi_get_nlimbs(quot) );
+    _gcry_mpi_fdiv_qr( quot, tmp, dividend, divisor);
+    mpi_free(tmp);
+}
+
+void
+_gcry_mpi_fdiv_qr( gcry_mpi_t quot, gcry_mpi_t rem, gcry_mpi_t dividend, gcry_mpi_t divisor )
+{
+    int divisor_sign = divisor->sign;
+    gcry_mpi_t temp_divisor = NULL;
+
+    if( quot == divisor || rem == divisor ) {
+	temp_divisor = mpi_copy( divisor );
+	divisor = temp_divisor;
+    }
+
+    _gcry_mpi_tdiv_qr( quot, rem, dividend, divisor );
+
+    if( (divisor_sign ^ dividend->sign) && rem->nlimbs ) {
+	gcry_mpi_sub_ui( quot, quot, 1 );
+	gcry_mpi_add( rem, rem, divisor);
+    }
+
+    if( temp_divisor )
+	mpi_free(temp_divisor);
+}
+
+
+/* If den == quot, den needs temporary storage.
+ * If den == rem, den needs temporary storage.
+ * If num == quot, num needs temporary storage.
+ * If den has temporary storage, it can be normalized while being copied,
+ *   i.e no extra storage should be allocated.
+ */
+
+void
+_gcry_mpi_tdiv_r( gcry_mpi_t rem, gcry_mpi_t num, gcry_mpi_t den)
+{
+    _gcry_mpi_tdiv_qr(NULL, rem, num, den );
+}
+
+void
+_gcry_mpi_tdiv_qr( gcry_mpi_t quot, gcry_mpi_t rem, gcry_mpi_t num, gcry_mpi_t den)
+{
+    mpi_ptr_t np, dp;
+    mpi_ptr_t qp, rp;
+    mpi_size_t nsize = num->nlimbs;
+    mpi_size_t dsize = den->nlimbs;
+    mpi_size_t qsize, rsize;
+    mpi_size_t sign_remainder = num->sign;
+    mpi_size_t sign_quotient = num->sign ^ den->sign;
+    unsigned normalization_steps;
+    mpi_limb_t q_limb;
+    mpi_ptr_t marker[5];
+    unsigned int marker_nlimbs[5];
+    int markidx=0;
+
+    /* Ensure space is enough for quotient and remainder.
+     * We need space for an extra limb in the remainder, because it's
+     * up-shifted (normalized) below.  */
+    rsize = nsize + 1;
+    mpi_resize( rem, rsize);
+
+    qsize = rsize - dsize;	  /* qsize cannot be bigger than this.	*/
+    if( qsize <= 0 ) {
+	if( num != rem ) {
+	    rem->nlimbs = num->nlimbs;
+	    rem->sign = num->sign;
+	    MPN_COPY(rem->d, num->d, nsize);
+	}
+	if( quot ) {
+	    /* This needs to follow the assignment to rem, in case the
+	     * numerator and quotient are the same.  */
+	    quot->nlimbs = 0;
+	    quot->sign = 0;
+	}
+	return;
+    }
+
+    if( quot )
+	mpi_resize( quot, qsize);
+
+    /* Read pointers here, when reallocation is finished.  */
+    np = num->d;
+    dp = den->d;
+    rp = rem->d;
+
+    /* Optimize division by a single-limb divisor.  */
+    if( dsize == 1 ) {
+	mpi_limb_t rlimb;
+	if( quot ) {
+	    qp = quot->d;
+	    rlimb = _gcry_mpih_divmod_1( qp, np, nsize, dp[0] );
+	    qsize -= qp[qsize - 1] == 0;
+	    quot->nlimbs = qsize;
+	    quot->sign = sign_quotient;
+	}
+	else
+	    rlimb = _gcry_mpih_mod_1( np, nsize, dp[0] );
+	rp[0] = rlimb;
+	rsize = rlimb != 0?1:0;
+	rem->nlimbs = rsize;
+	rem->sign = sign_remainder;
+	return;
+    }
+
+
+    if( quot ) {
+	qp = quot->d;
+	/* Make sure QP and NP point to different objects.  Otherwise the
+	 * numerator would be gradually overwritten by the quotient limbs.  */
+	if(qp == np) { /* Copy NP object to temporary space.  */
+            marker_nlimbs[markidx] = nsize;
+	    np = marker[markidx++] = mpi_alloc_limb_space(nsize,
+							  mpi_is_secure(quot));
+	    MPN_COPY(np, qp, nsize);
+	}
+    }
+    else /* Put quotient at top of remainder. */
+	qp = rp + dsize;
+
+    count_leading_zeros( normalization_steps, dp[dsize - 1] );
+
+    /* Normalize the denominator, i.e. make its most significant bit set by
+     * shifting it NORMALIZATION_STEPS bits to the left.  Also shift the
+     * numerator the same number of steps (to keep the quotient the same!).
+     */
+    if( normalization_steps ) {
+	mpi_ptr_t tp;
+	mpi_limb_t nlimb;
+
+	/* Shift up the denominator setting the most significant bit of
+	 * the most significant word.  Use temporary storage not to clobber
+	 * the original contents of the denominator.  */
+        marker_nlimbs[markidx] = dsize;
+	tp = marker[markidx++] = mpi_alloc_limb_space(dsize,mpi_is_secure(den));
+	_gcry_mpih_lshift( tp, dp, dsize, normalization_steps );
+	dp = tp;
+
+	/* Shift up the numerator, possibly introducing a new most
+	 * significant word.  Move the shifted numerator in the remainder
+	 * meanwhile.  */
+	nlimb = _gcry_mpih_lshift(rp, np, nsize, normalization_steps);
+	if( nlimb ) {
+	    rp[nsize] = nlimb;
+	    rsize = nsize + 1;
+	}
+	else
+	    rsize = nsize;
+    }
+    else {
+	/* The denominator is already normalized, as required.	Copy it to
+	 * temporary space if it overlaps with the quotient or remainder.  */
+	if( dp == rp || (quot && (dp == qp))) {
+	    mpi_ptr_t tp;
+
+            marker_nlimbs[markidx] = dsize;
+	    tp = marker[markidx++] = mpi_alloc_limb_space(dsize,
+                                                          mpi_is_secure(den));
+	    MPN_COPY( tp, dp, dsize );
+	    dp = tp;
+	}
+
+	/* Move the numerator to the remainder.  */
+	if( rp != np )
+	    MPN_COPY(rp, np, nsize);
+
+	rsize = nsize;
+    }
+
+    q_limb = _gcry_mpih_divrem( qp, 0, rp, rsize, dp, dsize );
+
+    if( quot ) {
+	qsize = rsize - dsize;
+	if(q_limb) {
+	    qp[qsize] = q_limb;
+	    qsize += 1;
+	}
+
+	quot->nlimbs = qsize;
+	quot->sign = sign_quotient;
+    }
+
+    rsize = dsize;
+    MPN_NORMALIZE (rp, rsize);
+
+    if( normalization_steps && rsize ) {
+	_gcry_mpih_rshift(rp, rp, rsize, normalization_steps);
+	rsize -= rp[rsize - 1] == 0?1:0;
+    }
+
+    rem->nlimbs = rsize;
+    rem->sign	= sign_remainder;
+    while( markidx )
+      {
+        markidx--;
+	_gcry_mpi_free_limb_space (marker[markidx], marker_nlimbs[markidx]);
+      }
+}
+
+void
+_gcry_mpi_tdiv_q_2exp( gcry_mpi_t w, gcry_mpi_t u, unsigned int count )
+{
+    mpi_size_t usize, wsize;
+    mpi_size_t limb_cnt;
+
+    usize = u->nlimbs;
+    limb_cnt = count / BITS_PER_MPI_LIMB;
+    wsize = usize - limb_cnt;
+    if( limb_cnt >= usize )
+	w->nlimbs = 0;
+    else {
+	mpi_ptr_t wp;
+	mpi_ptr_t up;
+
+	RESIZE_IF_NEEDED( w, wsize );
+	wp = w->d;
+	up = u->d;
+
+	count %= BITS_PER_MPI_LIMB;
+	if( count ) {
+	    _gcry_mpih_rshift( wp, up + limb_cnt, wsize, count );
+	    wsize -= !wp[wsize - 1];
+	}
+	else {
+	    MPN_COPY_INCR( wp, up + limb_cnt, wsize);
+	}
+
+	w->nlimbs = wsize;
+    }
+}
+
+/****************
+ * Check whether dividend is divisible by divisor
+ * (note: divisor must fit into a limb)
+ */
+int
+_gcry_mpi_divisible_ui(gcry_mpi_t dividend, ulong divisor )
+{
+    return !_gcry_mpih_mod_1( dividend->d, dividend->nlimbs, divisor );
+}
+
+
+void
+gcry_mpi_div (gcry_mpi_t quot, gcry_mpi_t rem, gcry_mpi_t dividend, gcry_mpi_t divisor, int round)
+{
+  if (!round)
+    {
+      if (!rem)
+        {
+          gcry_mpi_t tmp = mpi_alloc (mpi_get_nlimbs(quot));
+          _gcry_mpi_tdiv_qr (quot, tmp, dividend, divisor);
+          mpi_free (tmp);
+        }
+      else
+        _gcry_mpi_tdiv_qr (quot, rem, dividend, divisor);
+    }
+  else if (round < 0)
+    {
+      if (!rem)
+        _gcry_mpi_fdiv_q (quot, dividend, divisor);
+      else if (!quot)
+        _gcry_mpi_fdiv_r (rem, dividend, divisor);
+      else
+        _gcry_mpi_fdiv_qr (quot, rem, dividend, divisor);
+    }
+  else
+    log_bug ("mpi rounding to ceiling not yet implemented\n");
+}
+
+
+