crypto: lib - Move mpi into lib/crypto

As lib/mpi is mostly used by crypto code, move it under lib/crypto
so that patches touching it get directed to the right mailing list.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Reviewed-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 0 insertions, 234 deletions

diff --git a/lib/mpi/mpi-div.c b/lib/mpi/mpi-div.c
deleted file mode 100644
index 45beab8b9e9e..000000000000
--- a/lib/mpi/mpi-div.c
+++ /dev/null
@@ -1,234 +0,0 @@
-/* mpi-div.c  -  MPI functions
- * Copyright (C) 1994, 1996, 1998, 2001, 2002,
- *               2003 Free Software Foundation, Inc.
- *
- * This file is part of Libgcrypt.
- *
- * 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 "mpi-internal.h"
-#include "longlong.h"
-
-void mpi_tdiv_qr(MPI quot, MPI rem, MPI num, MPI den);
-void mpi_fdiv_qr(MPI quot, MPI rem, MPI dividend, MPI divisor);
-
-void mpi_fdiv_r(MPI rem, MPI dividend, MPI divisor)
-{
-	int divisor_sign = divisor->sign;
-	MPI 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;
-	}
-
-	mpi_tdiv_r(rem, dividend, divisor);
-
-	if (((divisor_sign?1:0) ^ (dividend->sign?1:0)) && rem->nlimbs)
-		mpi_add(rem, rem, divisor);
-
-	if (temp_divisor)
-		mpi_free(temp_divisor);
-}
-
-void mpi_fdiv_q(MPI quot, MPI dividend, MPI divisor)
-{
-	MPI tmp = mpi_alloc(mpi_get_nlimbs(quot));
-	mpi_fdiv_qr(quot, tmp, dividend, divisor);
-	mpi_free(tmp);
-}
-
-void mpi_fdiv_qr(MPI quot, MPI rem, MPI dividend, MPI divisor)
-{
-	int divisor_sign = divisor->sign;
-	MPI temp_divisor = NULL;
-
-	if (quot == divisor || rem == divisor) {
-		temp_divisor = mpi_copy(divisor);
-		divisor = temp_divisor;
-	}
-
-	mpi_tdiv_qr(quot, rem, dividend, divisor);
-
-	if ((divisor_sign ^ dividend->sign) && rem->nlimbs) {
-		mpi_sub_ui(quot, quot, 1);
-		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 mpi_tdiv_r(MPI rem, MPI num, MPI den)
-{
-	mpi_tdiv_qr(NULL, rem, num, den);
-}
-
-void mpi_tdiv_qr(MPI quot, MPI rem, MPI num, MPI 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 int normalization_steps;
-	mpi_limb_t q_limb;
-	mpi_ptr_t marker[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 = mpihelp_divmod_1(qp, np, nsize, dp[0]);
-			qsize -= qp[qsize - 1] == 0;
-			quot->nlimbs = qsize;
-			quot->sign = sign_quotient;
-		} else
-			rlimb = mpihelp_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.  */
-			np = marker[markidx++] = mpi_alloc_limb_space(nsize);
-			MPN_COPY(np, qp, nsize);
-		}
-	} else /* Put quotient at top of remainder. */
-		qp = rp + dsize;
-
-	normalization_steps = count_leading_zeros(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.
-		 */
-		tp = marker[markidx++] = mpi_alloc_limb_space(dsize);
-		mpihelp_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 = mpihelp_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;
-
-			tp = marker[markidx++] = mpi_alloc_limb_space(dsize);
-			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 = mpihelp_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) {
-		mpihelp_rshift(rp, rp, rsize, normalization_steps);
-		rsize -= rp[rsize - 1] == 0?1:0;
-	}
-
-	rem->nlimbs = rsize;
-	rem->sign	= sign_remainder;
-	while (markidx) {
-		markidx--;
-		mpi_free_limb_space(marker[markidx]);
-	}
-}