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Fix for partially interpreted floating-point functions. Relates to #2596, #2631.

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Christoph M. Wintersteiger 2019-10-25 15:59:19 +01:00
parent 1d4f8c0168
commit 2308d8af09
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GPG key ID: BCF6360F86294467
7 changed files with 118 additions and 86 deletions
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46
src/ast/fpa_decl_plugin.cpp
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@ -19,6 +19,7 @@ Revision History:
#include "ast/fpa_decl_plugin.h"
#include "ast/arith_decl_plugin.h"
#include "ast/bv_decl_plugin.h"
#include "ast/ast_smt2_pp.h"
fpa_decl_plugin::fpa_decl_plugin():
m_values(m_fm),
@ -68,6 +69,10 @@ void fpa_decl_plugin::recycled_id(unsigned id) {
m_fm.del(m_values[id]);
}
bool fpa_decl_plugin::is_considered_uninterpreted(func_decl * f) {
return false;
}
func_decl * fpa_decl_plugin::mk_numeral_decl(mpf const & v) {
sort * s = mk_float_sort(v.get_ebits(), v.get_sbits());
func_decl * r = nullptr;
@ -1044,3 +1049,44 @@ bool fpa_util::contains_floats(ast * a) {
return false;
}
bool fpa_util::is_considered_uninterpreted(func_decl * f, unsigned n, expr* const* args) {
TRACE("fpa_util", expr_ref t(m().mk_app(f, n, args), m()); tout << mk_ismt2_pp(t, m()) << std::endl; );
family_id ffid = plugin().get_family_id();
if (f->get_family_id() != ffid)
return false;
if (is_decl_of(f, ffid, OP_FPA_TO_IEEE_BV)) {
SASSERT(n == 1);
expr* x = args[0];
return is_nan(x);
}
else if (is_decl_of(f, ffid, OP_FPA_TO_SBV) ||
is_decl_of(f, ffid, OP_FPA_TO_UBV)) {
SASSERT(n == 2);
SASSERT(f->get_num_parameters() == 1);
bool is_signed = f->get_decl_kind() == OP_FPA_TO_SBV;
expr* rm = args[0];
expr* x = args[1];
unsigned bv_sz = f->get_parameter(0).get_int();
mpf_rounding_mode rmv;
mpf v;
if (!is_rm_numeral(rm, rmv) || !is_numeral(x, v)) return false;
if (is_nan(x) || is_inf(x)) return true;
unsynch_mpq_manager& mpqm = plugin().fm().mpq_manager();
scoped_mpq r(mpqm);
plugin().fm().to_sbv_mpq(rmv, v, r);
if (is_signed)
return mpqm.bitsize(r) >= bv_sz;
else
return mpqm.is_neg(r) || mpqm.bitsize(r) > bv_sz;
}
else if (is_decl_of(f, ffid, OP_FPA_TO_REAL)) {
SASSERT(n == 1);
expr* x = args[0];
return is_nan(x) || is_inf(x);
}
return plugin().is_considered_uninterpreted(f);
}