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Unified Diff: gcc/gmp/mpn/generic/sb_bdiv_q.c

Issue 3050029: [gcc] GCC 4.5.0=>4.5.1 (Closed) Base URL: ssh://git@gitrw.chromium.org:9222/nacl-toolchain.git
Patch Set: Created 10 years, 5 months ago
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Index: gcc/gmp/mpn/generic/sb_bdiv_q.c
diff --git a/gcc/gmp/mpn/generic/sb_bdiv_q.c b/gcc/gmp/mpn/generic/sb_bdiv_q.c
deleted file mode 100644
index 474c804d48a38ad5786a03bff2dbf9bfe4f1644a..0000000000000000000000000000000000000000
--- a/gcc/gmp/mpn/generic/sb_bdiv_q.c
+++ /dev/null
@@ -1,91 +0,0 @@
-/* mpn_sb_bdiv_q -- schoolbook Hensel division with precomputed inverse,
- returning quotient only.
-
- Contributed to the GNU project by Niels Möller.
-
- THE FUNCTIONS IN THIS FILE ARE INTERNAL FUNCTIONS WITH MUTABLE INTERFACES.
- IT IS ONLY SAFE TO REACH THEM THROUGH DOCUMENTED INTERFACES. IN FACT, IT IS
- ALMOST GUARANTEED THAT THEY'LL CHANGE OR DISAPPEAR IN A FUTURE GMP RELEASE.
-
-Copyright 2005, 2006 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 3 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. If not, see http://www.gnu.org/licenses/. */
-
-#include "gmp.h"
-#include "gmp-impl.h"
-
-
-/* Computes Q = N / D mod B^nn, destroys N.
- Clobbers N.
-
- D must be odd. dinv is (-D)^-1 mod B.
-
-
- The straightforward way to compute Q is to cancel one limb at a time, using
-
- qp[i] = D^{-1} * np[i] (mod B)
- N -= B^i * qp[i] * D
-
- But we prefer addition to subtraction, since mpn_addmul_1 is often faster
- than mpn_submul_1. Q = - N / D can be computed by iterating
-
- qp[i] = (-D)^{-1} * np[i] (mod B)
- N += B^i * qp[i] * D
-
- And then we flip the sign, -Q = (not Q) + 1.
-*/
-
-void
-mpn_sb_bdiv_q (mp_ptr qp,
- mp_ptr np, mp_size_t nn,
- mp_srcptr dp, mp_size_t dn,
- mp_limb_t dinv)
-{
- mp_size_t i;
- mp_limb_t qh;
-
- ASSERT (nn > 0);
- ASSERT (dn > 0);
- ASSERT (nn >= dn);
- ASSERT (dp[0] & 1);
-
- for (i = 0; i < nn - dn; i++)
- {
- mp_limb_t cy;
- mp_limb_t q;
-
- q = dinv * np[i];
- qp[i] = ~q;
- cy = mpn_addmul_1 (np + i, dp, dn, q);
- mpn_add_1 (np + i + dn, np + i + dn, nn - i - dn, cy);
- ASSERT (np[i] == 0);
- }
-
- for (; i < nn - 1; i++)
- {
- mp_limb_t q;
-
- q = dinv * np[i];
- qp[i] = ~q;
- mpn_addmul_1 (np + i, dp, nn - i, q);
-
- ASSERT (np[i] == 0);
- }
-
- /* Final limb */
- qp[nn - 1] = ~(dinv * np[nn - 1]);
- qh = mpn_add_1 (qp, qp, nn, 1); /* FIXME: can we get carry? */
-}
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