99 lines
3.3 KiB
C
99 lines
3.3 KiB
C
/*=============================================================================
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This file is part of FLINT.
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FLINT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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FLINT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FLINT; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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=============================================================================*/
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/******************************************************************************
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Copyright (C) 2012 Sebastian Pancratz
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Copyright (C) 2013 Mike Hansen
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******************************************************************************/
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#ifdef T
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#include "templates.h"
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void
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_TEMPLATE(T, poly_mul_classical) (TEMPLATE(T, struct) * rop,
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const TEMPLATE(T, struct) * op1, slong len1,
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const TEMPLATE(T, struct) * op2, slong len2,
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const TEMPLATE(T, ctx_t) ctx)
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{
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if (len1 == 1 && len2 == 1)
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{
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TEMPLATE(T, mul) (rop, op1, op2, ctx);
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}
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else
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{
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slong i;
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/* Set res[i] = poly1[i]*poly2[0] */
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_TEMPLATE(T, TEMPLATE(poly_scalar_mul, T)) (rop, op1, len1, op2, ctx);
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/* Set res[i+len1-1] = in1[len1-1]*in2[i] */
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_TEMPLATE(T, TEMPLATE(poly_scalar_mul, T)) (rop + len1, op2 + 1,
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len2 - 1, op1 + len1 - 1,
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ctx);
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/* out[i+j] += in1[i]*in2[j] */
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for (i = 0; i < len1 - 1; i++)
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_TEMPLATE(T, TEMPLATE(poly_scalar_addmul, T)) (rop + i + 1,
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op2 + 1, len2 - 1,
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op1 + i, ctx);
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}
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}
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void
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TEMPLATE(T, poly_mul_classical) (TEMPLATE(T, poly_t) rop,
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const TEMPLATE(T, poly_t) op1,
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const TEMPLATE(T, poly_t) op2,
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const TEMPLATE(T, ctx_t) ctx)
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{
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const slong len = op1->length + op2->length - 1;
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if (op1->length == 0 || op2->length == 0)
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{
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TEMPLATE(T, poly_zero) (rop, ctx);
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return;
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}
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if (rop == op1 || rop == op2)
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{
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TEMPLATE(T, poly_t) t;
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TEMPLATE(T, poly_init2) (t, len, ctx);
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_TEMPLATE(T, poly_mul_classical) (t->coeffs, op1->coeffs, op1->length,
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op2->coeffs, op2->length, ctx);
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TEMPLATE(T, poly_swap) (rop, t, ctx);
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TEMPLATE(T, poly_clear) (t, ctx);
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}
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else
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{
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TEMPLATE(T, poly_fit_length) (rop, len, ctx);
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_TEMPLATE(T, poly_mul_classical) (rop->coeffs, op1->coeffs,
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op1->length, op2->coeffs,
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op2->length, ctx);
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}
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_TEMPLATE(T, poly_set_length) (rop, len, ctx);
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}
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#endif
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