1 /* mpn_mulmid_n -- balanced middle product 2 3 Contributed by David Harvey. 4 5 THE FUNCTION IN THIS FILE IS INTERNAL WITH A MUTABLE INTERFACE. IT IS ONLY 6 SAFE TO REACH IT THROUGH DOCUMENTED INTERFACES. IN FACT, IT IS ALMOST 7 GUARANTEED THAT IT'LL CHANGE OR DISAPPEAR IN A FUTURE GNU MP RELEASE. 8 9 Copyright 2011 Free Software Foundation, Inc. 10 11 This file is part of the GNU MP Library. 12 13 The GNU MP Library is free software; you can redistribute it and/or modify 14 it under the terms of the GNU Lesser General Public License as published by 15 the Free Software Foundation; either version 3 of the License, or (at your 16 option) any later version. 17 18 The GNU MP Library is distributed in the hope that it will be useful, but 19 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 20 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 21 License for more details. 22 23 You should have received a copy of the GNU Lesser General Public License 24 along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */ 25 26 27 #include "gmp.h" 28 #include "gmp-impl.h" 29 30 31 void 32 mpn_mulmid_n (mp_ptr rp, mp_srcptr ap, mp_srcptr bp, mp_size_t n) 33 { 34 ASSERT (n >= 1); 35 ASSERT (! MPN_OVERLAP_P (rp, n + 2, ap, 2*n - 1)); 36 ASSERT (! MPN_OVERLAP_P (rp, n + 2, bp, n)); 37 38 if (n < MULMID_TOOM42_THRESHOLD) 39 { 40 mpn_mulmid_basecase (rp, ap, 2*n - 1, bp, n); 41 } 42 else 43 { 44 mp_ptr scratch; 45 TMP_DECL; 46 TMP_MARK; 47 scratch = TMP_ALLOC_LIMBS (mpn_toom42_mulmid_itch (n)); 48 mpn_toom42_mulmid (rp, ap, bp, n, scratch); 49 TMP_FREE; 50 } 51 } 52