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fix bug in hoist module, tune num2bits for large bit-vectors

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-02-08 14:40:06 -08:00
parent d2a3b53d92
commit b17c946acb
3 changed files with 55 additions and 18 deletions
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18
src/ast/rewriter/bit_blaster/bit_blaster_tpl_def.h
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@ -75,9 +75,23 @@ bool bit_blaster_tpl<Cfg>::is_minus_one(unsigned sz, expr * const * bits) const
static void _num2bits(ast_manager & m, rational const & v, unsigned sz, expr_ref_vector & out_bits) {
SASSERT(v.is_nonneg());
rational aux = v;
rational two(2);
rational two(2), base32(1ull << 32ull, rational::ui64());
for (unsigned i = 0; i < sz; i++) {
if ((aux % two).is_zero())
if (i + 32 < sz) {
unsigned u = (aux % base32).get_unsigned();
for (unsigned j = 0; j < 32; ++j) {
if (0 != (u & (1 << j))) {
out_bits.push_back(m.mk_true());
}
else {
out_bits.push_back(m.mk_false());
}
}
aux = div(aux, base32);
i += 31;
continue;
}
else if ((aux % two).is_zero())
out_bits.push_back(m.mk_false());
else
out_bits.push_back(m.mk_true());