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FPA: bugfix for QFPA -> QBV conversion.

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Signed-off-by: Christoph M. Wintersteiger <cwinter@microsoft.com>
This commit is contained in:
Christoph M. Wintersteiger 2013-05-07 18:27:47 +01:00
parent 2751d97027
commit 787a65be29
1 changed files with 18 additions and 18 deletions
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36
src/tactic/fpa/fpa2bv_rewriter.h
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@ -30,7 +30,8 @@ struct fpa2bv_rewriter_cfg : public default_rewriter_cfg {
expr_ref_vector m_out;
fpa2bv_converter & m_conv;
sort_ref_vector m_bindings;
expr_ref_vector m_mappings;
expr_ref_vector m_mappings;
unsigned long long m_max_memory;
unsigned m_max_steps;
@ -227,25 +228,24 @@ struct fpa2bv_rewriter_cfg : public default_rewriter_cfg {
if (t->get_idx() >= m_bindings.size())
return false;
unsigned inx = m_bindings.size() - t->get_idx() - 1;
if (m_mappings[inx] == 0)
expr_ref new_exp(m());
sort * s = t->get_sort();
if (m_conv.is_float(s))
{
expr_ref new_exp(m());
sort * s = t->get_sort();
if (m_conv.is_float(s))
{
expr_ref new_var(m());
unsigned ebits = m_conv.fu().get_ebits(s);
unsigned sbits = m_conv.fu().get_sbits(s);
new_var = m().mk_var(t->get_idx(), m_conv.bu().mk_sort(sbits+ebits));
m_conv.mk_triple(m_conv.bu().mk_extract(sbits+ebits-1, sbits+ebits-1, new_var),
m_conv.bu().mk_extract(sbits+ebits-2, ebits, new_var),
m_conv.bu().mk_extract(ebits-1, 0, new_var),
new_exp);
}
else
new_exp = m().mk_var(t->get_idx(), s);
m_mappings[inx] = new_exp;
expr_ref new_var(m());
unsigned ebits = m_conv.fu().get_ebits(s);
unsigned sbits = m_conv.fu().get_sbits(s);
new_var = m().mk_var(t->get_idx(), m_conv.bu().mk_sort(sbits+ebits));
m_conv.mk_triple(m_conv.bu().mk_extract(sbits+ebits-1, sbits+ebits-1, new_var),
m_conv.bu().mk_extract(sbits+ebits-2, ebits, new_var),
m_conv.bu().mk_extract(ebits-1, 0, new_var),
new_exp);
}
else
new_exp = m().mk_var(t->get_idx(), s);
m_mappings[inx] = new_exp;
result = m_mappings[inx].get();
result_pr = 0;
TRACE("fpa2bv", tout << "reduce_var: " << mk_ismt2_pp(t, m()) << " -> " << mk_ismt2_pp(result, m()) << std::endl;);