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/*
Copyright (C) 2012 Thomas M. DuBuisson
Copyright (C) 2012 Sebastian Pancratz
This file is part of FLINT.
FLINT is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 3 of the License, or
(at your option) any later version. See <https://www.gnu.org/licenses/>.
*/
#include "gmpcompat.h"
#include "fmpz.h"
void fmpz_and(fmpz_t f, const fmpz_t g, const fmpz_t h)
{
fmpz c1,c2;
c1 = *g;
c2 = *h;
if(!COEFF_IS_MPZ(c1))
{
if(!COEFF_IS_MPZ(c2)) /* both inputs are small */
{
fmpz_set_si(f, c1 & c2);
} else /* g is small, h is large */
{
mpz_t tmp;
mpz_ptr mpz3 = _fmpz_promote(f);
flint_mpz_init_set_si(tmp, c1);
mpz_and(mpz3, COEFF_TO_PTR(c2), tmp);
_fmpz_demote_val(f);
mpz_clear(tmp);
}
} else
{
if(!COEFF_IS_MPZ(c2)) /* g is large, h is small */
{
mpz_t tmp;
mpz_ptr mpz3 = _fmpz_promote(f);
flint_mpz_init_set_si(tmp, c2);
mpz_and(mpz3, COEFF_TO_PTR(c1), tmp);
_fmpz_demote_val(f);
mpz_clear(tmp);
} else /* g and h are large */
{
mpz_ptr mpz3 = _fmpz_promote(f);
mpz_ptr mpz1 = COEFF_TO_PTR(c1);
mpz_ptr mpz2 = COEFF_TO_PTR(c2);
mpz_and(mpz3, mpz1, mpz2);
_fmpz_demote_val(f);
}
}
}
void fmpz_complement(fmpz_t r, const fmpz_t f)
{
if (!COEFF_IS_MPZ(*f)) /* f is small */
{
slong res = ~(*f);
fmpz_set_si(r, res);
} else /* f is big */
{
if(r != f) { /* not aliased */
mpz_ptr ptr, ptr2;
ptr = _fmpz_promote(r);
ptr2 = COEFF_TO_PTR(*f);
mpz_com(ptr, ptr2);
_fmpz_demote_val(r);
} else { /* alaised */
fmpz_t tmp;
mpz_ptr ptr, ptr2;
fmpz_init(tmp);
ptr = _fmpz_promote(tmp);
ptr2 = COEFF_TO_PTR(*f);
mpz_com(ptr, ptr2);
_fmpz_demote_val(tmp);
fmpz_set(r,tmp);
fmpz_clear(tmp);
}
}
}
void fmpz_or(fmpz_t f, const fmpz_t g, const fmpz_t h)
{
fmpz c1,c2;
c1 = *g;
c2 = *h;
if(!COEFF_IS_MPZ(c1))
{
if(!COEFF_IS_MPZ(c2)) /* both inputs are small */
{
fmpz_set_si(f, c1 | c2);
} else /* g is small, h is large */
{
mpz_t tmp;
mpz_ptr mpz3 = _fmpz_promote(f);
flint_mpz_init_set_si(tmp,c1);
mpz_ior(mpz3, COEFF_TO_PTR(c2), tmp);
_fmpz_demote_val(f);
mpz_clear(tmp);
}
} else
{
if(!COEFF_IS_MPZ(c2)) /* g is large, h is small */
{
mpz_t tmp;
mpz_ptr mpz3 = _fmpz_promote(f);
flint_mpz_init_set_si(tmp,c2);
mpz_ior(mpz3, COEFF_TO_PTR(c1), tmp);
_fmpz_demote_val(f);
mpz_clear(tmp);
} else /* g and h are large */
{
mpz_ptr mpz3 = _fmpz_promote(f);
mpz_ptr mpz1 = COEFF_TO_PTR(c1);
mpz_ptr mpz2 = COEFF_TO_PTR(c2);
mpz_ior(mpz3, mpz1, mpz2);
_fmpz_demote_val(f);
}
}
}
void fmpz_xor(fmpz_t f, const fmpz_t g, const fmpz_t h)
{
fmpz c1,c2;
c1 = *g;
c2 = *h;
if(!COEFF_IS_MPZ(c1))
{
if(!COEFF_IS_MPZ(c2)) /* both inputs are small */
{
fmpz_set_si(f, c1 ^ c2);
} else /* g is small, h is large */
{
mpz_t tmp;
mpz_ptr mpz3 = _fmpz_promote(f);
flint_mpz_init_set_si(tmp, c1);
mpz_xor(mpz3, COEFF_TO_PTR(c2), tmp);
_fmpz_demote_val(f);
mpz_clear(tmp);
}
} else
{
if(!COEFF_IS_MPZ(c2)) /* g is large, h is small */
{
mpz_t tmp;
mpz_ptr mpz3 = _fmpz_promote(f);
flint_mpz_init_set_si(tmp, c2);
mpz_xor(mpz3, COEFF_TO_PTR(c1), tmp);
_fmpz_demote_val(f);
mpz_clear(tmp);
} else /* g and h are large */
{
mpz_ptr mpz3 = _fmpz_promote(f);
mpz_ptr mpz1 = COEFF_TO_PTR(c1);
mpz_ptr mpz2 = COEFF_TO_PTR(c2);
mpz_xor(mpz3, mpz1, mpz2);
_fmpz_demote_val(f);
}
}
}
void fmpz_clrbit(fmpz_t f, ulong i)
{
if (!COEFF_IS_MPZ(*f))
{
if (i < SMALL_FMPZ_BITCOUNT_MAX)
{
*f &= ~(WORD(1) << i);
}
/* i >= FLINT_BITS --> nop */
}
else
{
mpz_ptr ptr = COEFF_TO_PTR(*f);
mpz_clrbit(ptr, i);
_fmpz_demote_val(f);
}
}
void fmpz_combit(fmpz_t f, ulong i)
{
if (!COEFF_IS_MPZ(*f))
{
if (i < SMALL_FMPZ_BITCOUNT_MAX)
{
*f ^= (WORD(1) << i);
}
else /* i >= FLINT_BITS */
{
mpz_ptr ptr = _fmpz_promote_val(f);
mpz_combit(ptr, i);
_fmpz_demote_val(f);
}
}
else
{
mpz_ptr ptr = COEFF_TO_PTR(*f);
mpz_combit(ptr, i);
_fmpz_demote_val(f);
}
}
flint_bitcnt_t fmpz_popcnt(const fmpz_t c)
{
ulong d;
fmpz c1 = *c;
if (!COEFF_IS_MPZ(c1))
{
if (c1 < 0)
return 0;
d = c1;
return mpn_popcount(&d, 1);
}
else
{
mpz_ptr t = COEFF_TO_PTR(c1);
if (mpz_sgn(t) < 0)
return 0;
else
return mpz_popcount(t);
}
}