mirror of
https://github.com/Z3Prover/z3
synced 2025-04-28 19:35:50 +00:00
fpa2bv refactoring
Signed-off-by: Christoph M. Wintersteiger <cwinter@microsoft.com>
This commit is contained in:
Christoph M. Wintersteiger
parent
d5fef38c00
commit
a1b4ef9e1b
5 changed files with 169 additions and 81 deletions
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@ -163,10 +163,10 @@ decl_plugin * float_decl_plugin::mk_fresh() {
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}
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sort * float_decl_plugin::mk_float_sort(unsigned ebits, unsigned sbits) {
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if (ebits > sbits)
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m_manager->raise_exception("floating point sorts with ebits > sbits are currently not supported");
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if (ebits <= 2)
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m_manager->raise_exception("floating point sorts with ebits <= 2 are currently not supported");
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if (sbits < 2)
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m_manager->raise_exception("minimum number of significand bits is 1");
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if (ebits < 2)
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m_manager->raise_exception("minimum number of exponent bits is 2");
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parameter p1(ebits), p2(sbits);
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parameter ps[2] = { p1, p2 };
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@ -182,13 +182,8 @@ sort * float_decl_plugin::mk_rm_sort() {
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sort * float_decl_plugin::mk_sort(decl_kind k, unsigned num_parameters, parameter const * parameters) {
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switch (k) {
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case FLOAT_SORT:
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if (!(num_parameters == 2 && parameters[0].is_int() && parameters[1].is_int())) {
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m_manager->raise_exception("expecting two integer parameters to floating point sort");
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}
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if (parameters[0].get_int() <= 1 || parameters[1].get_int() <= 1)
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m_manager->raise_exception("floating point sorts need parameters > 1");
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if (parameters[0].get_int() > parameters[1].get_int())
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m_manager->raise_exception("floating point sorts with ebits > sbits are currently not supported");
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if (!(num_parameters == 2 && parameters[0].is_int() && parameters[1].is_int()))
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m_manager->raise_exception("expecting two integer parameters to floating point sort (ebits, sbits)");
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return mk_float_sort(parameters[0].get_int(), parameters[1].get_int());
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case ROUNDING_MODE_SORT:
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return mk_rm_sort();
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@ -279,8 +274,8 @@ func_decl * float_decl_plugin::mk_bin_rel_decl(decl_kind k, unsigned num_paramet
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case OP_FLOAT_EQ: name = "fp.eq"; break;
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case OP_FLOAT_LT: name = "fp.lt"; break;
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case OP_FLOAT_GT: name = "fp.gt"; break;
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case OP_FLOAT_LE: name = "fp.lte"; break;
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case OP_FLOAT_GE: name = "fp.gte"; break;
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case OP_FLOAT_LE: name = "fp.leq"; break;
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case OP_FLOAT_GE: name = "fp.geq"; break;
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default:
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UNREACHABLE();
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break;
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@ -408,9 +403,12 @@ func_decl * float_decl_plugin::mk_to_fp(decl_kind k, unsigned num_parameters, pa
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is_sort_of(domain[1], m_bv_fid, BV_SORT) &&
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is_sort_of(domain[2], m_bv_fid, BV_SORT)) {
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// 3 BVs -> 1 FP
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sort * fp = mk_float_sort(domain[2]->get_parameter(0).get_int(), domain[1]->get_parameter(0).get_int()+1);
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symbol name("fp");
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return m_manager->mk_func_decl(name, arity, domain, fp, func_decl_info(m_family_id, k, num_parameters, parameters));
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unsigned ebits = domain[1]->get_parameter(0).get_int();
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unsigned sbits = domain[2]->get_parameter(0).get_int() + 1;
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parameter ps[] = { parameter(ebits), parameter(sbits) };
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sort * fp = mk_float_sort(ebits, sbits);
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symbol name("to_fp");
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return m_manager->mk_func_decl(name, arity, domain, fp, func_decl_info(m_family_id, k, 2, ps));
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}
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else if (m_bv_plugin && arity == 1 && is_sort_of(domain[0], m_bv_fid, BV_SORT)) {
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// 1 BV -> 1 FP
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@ -423,7 +421,7 @@ func_decl * float_decl_plugin::mk_to_fp(decl_kind k, unsigned num_parameters, pa
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int sbits = parameters[1].get_int();
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if (domain[0]->get_parameter(0).get_int() != (ebits + sbits))
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m_manager->raise_exception("sort mismtach; invalid bit-vector size, expected bitvector of size (ebits+sbits)");
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m_manager->raise_exception("sort mismatch; invalid bit-vector size, expected bitvector of size (ebits+sbits)");
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sort * fp = mk_float_sort(ebits, sbits);
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symbol name("to_fp");
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@ -613,6 +611,39 @@ func_decl * float_decl_plugin::mk_float_to_ieee_bv(decl_kind k, unsigned num_par
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return m_manager->mk_func_decl(name, 1, domain, bv_srt, func_decl_info(m_family_id, k, num_parameters, parameters));
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}
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func_decl * float_decl_plugin::mk_internal_bv_wrap(decl_kind k, unsigned num_parameters, parameter const * parameters,
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unsigned arity, sort * const * domain, sort * range) {
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if (arity != 1)
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m_manager->raise_exception("invalid number of arguments to internal_bv_wrap");
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if (!is_float_sort(domain[0]) && !is_rm_sort(domain[0]))
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m_manager->raise_exception("sort mismatch, expected argument of FloatingPoint or RoundingMode sort");
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if (is_float_sort(domain[0]))
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{
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unsigned float_sz = domain[0]->get_parameter(0).get_int() + domain[0]->get_parameter(1).get_int();
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parameter ps[] = { parameter(float_sz) };
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sort * bv_srt = m_bv_plugin->mk_sort(m_bv_fid, 1, ps);
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return m_manager->mk_func_decl(symbol("bv_wrap"), 1, domain, bv_srt, func_decl_info(m_family_id, k, num_parameters, parameters));
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}
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else {
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parameter ps[] = { parameter(3) };
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sort * bv_srt = m_bv_plugin->mk_sort(m_bv_fid, 1, ps);
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return m_manager->mk_func_decl(symbol("bv_wrap"), 1, domain, bv_srt, func_decl_info(m_family_id, k, num_parameters, parameters));
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}
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}
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func_decl * float_decl_plugin::mk_internal_bv_unwrap(decl_kind k, unsigned num_parameters, parameter const * parameters,
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unsigned arity, sort * const * domain, sort * range) {
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if (arity != 1)
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m_manager->raise_exception("invalid number of arguments to internal_bv_unwrap");
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if (!is_sort_of(domain[0], m_bv_fid, BV_SORT))
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m_manager->raise_exception("sort mismatch, expected argument of bitvector sort");
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if (!is_float_sort(range) && !is_rm_sort(range))
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m_manager->raise_exception("sort mismatch, expected range of FloatingPoint sort");
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return m_manager->mk_func_decl(symbol("bv_unwrap"), 1, domain, range, func_decl_info(m_family_id, k, num_parameters, parameters));
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}
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func_decl * float_decl_plugin::mk_func_decl(decl_kind k, unsigned num_parameters, parameter const * parameters,
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unsigned arity, sort * const * domain, sort * range) {
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@ -680,6 +711,10 @@ func_decl * float_decl_plugin::mk_func_decl(decl_kind k, unsigned num_parameters
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return mk_to_fp_unsigned(k, num_parameters, parameters, arity, domain, range);
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case OP_FLOAT_TO_IEEE_BV:
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return mk_float_to_ieee_bv(k, num_parameters, parameters, arity, domain, range);
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case OP_FLOAT_INTERNAL_BVWRAP:
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return mk_internal_bv_wrap(k, num_parameters, parameters, arity, domain, range);
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case OP_FLOAT_INTERNAL_BVUNWRAP:
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return mk_internal_bv_unwrap(k, num_parameters, parameters, arity, domain, range);
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default:
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m_manager->raise_exception("unsupported floating point operator");
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return 0;
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@ -86,6 +86,10 @@ enum float_op_kind {
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/* Extensions */
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OP_FLOAT_TO_IEEE_BV,
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/* Internal use only */
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OP_FLOAT_INTERNAL_BVWRAP,
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OP_FLOAT_INTERNAL_BVUNWRAP,
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LAST_FLOAT_OP
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};
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@ -150,6 +154,11 @@ class float_decl_plugin : public decl_plugin {
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func_decl * mk_float_to_ieee_bv(decl_kind k, unsigned num_parameters, parameter const * parameters,
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unsigned arity, sort * const * domain, sort * range);
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func_decl * mk_internal_bv_wrap(decl_kind k, unsigned num_parameters, parameter const * parameters,
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unsigned arity, sort * const * domain, sort * range);
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func_decl * mk_internal_bv_unwrap(decl_kind k, unsigned num_parameters, parameter const * parameters,
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unsigned arity, sort * const * domain, sort * range);
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virtual void set_manager(ast_manager * m, family_id id);
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unsigned mk_id(mpf const & v);
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void recycled_id(unsigned id);
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@ -32,7 +32,7 @@ fpa2bv_converter::fpa2bv_converter(ast_manager & m) :
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m_arith_util(m),
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m_mpf_manager(m_util.fm()),
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m_mpz_manager(m_mpf_manager.mpz_manager()),
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extra_assertions(m) {
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m_extra_assertions(m) {
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m_plugin = static_cast<float_decl_plugin*>(m.get_plugin(m.mk_family_id("float")));
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}
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@ -76,10 +76,15 @@ void fpa2bv_converter::mk_ite(expr * c, expr * t, expr * f, expr_ref & result) {
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SASSERT(is_app_of(t, m_plugin->get_family_id(), OP_FLOAT_TO_FP));
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SASSERT(is_app_of(f, m_plugin->get_family_id(), OP_FLOAT_TO_FP));
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expr *t_sgn, *t_sig, *t_exp;
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expr *f_sgn, *f_sig, *f_exp;
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split_triple(t, t_sgn, t_sig, t_exp);
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split_triple(f, f_sgn, f_sig, f_exp);
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expr_ref sgn(m), s(m), e(m);
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m_simp.mk_ite(c, to_app(t)->get_arg(0), to_app(f)->get_arg(0), sgn);
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m_simp.mk_ite(c, to_app(t)->get_arg(1), to_app(f)->get_arg(1), s);
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m_simp.mk_ite(c, to_app(t)->get_arg(2), to_app(f)->get_arg(2), e);
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m_simp.mk_ite(c, t_sgn, f_sgn, sgn);
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m_simp.mk_ite(c, t_sig, f_sig, s);
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m_simp.mk_ite(c, t_exp, f_exp, e);
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mk_triple(sgn, s, e, result);
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}
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@ -122,6 +127,10 @@ void fpa2bv_converter::mk_value(func_decl * f, unsigned num, expr * const * args
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}
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}
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app * fpa2bv_converter::mk_fresh_const(char const * prefix, unsigned sz) {
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return m.mk_fresh_const(prefix, m_bv_util.mk_sort(sz));
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}
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void fpa2bv_converter::mk_const(func_decl * f, expr_ref & result) {
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SASSERT(f->get_family_id() == null_family_id);
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SASSERT(f->get_arity() == 0);
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@ -134,25 +143,21 @@ void fpa2bv_converter::mk_const(func_decl * f, expr_ref & result) {
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SASSERT(is_float(srt));
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unsigned ebits = m_util.get_ebits(srt);
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unsigned sbits = m_util.get_sbits(srt);
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expr_ref sgn(m), s(m), e(m);
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app_ref sgn(m), s(m), e(m);
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#ifdef Z3DEBUG
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sort_ref s_sgn(m), s_sig(m), s_exp(m);
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s_sgn = m_bv_util.mk_sort(1);
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s_sig = m_bv_util.mk_sort(sbits - 1);
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s_exp = m_bv_util.mk_sort(ebits);
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std::string p("fpa2bv");
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std::string name = f->get_name().str();
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sgn = m.mk_fresh_const((p + "_sgn_" + name).c_str(), s_sgn);
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s = m.mk_fresh_const((p + "_sig_" + name).c_str(), s_sig);
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e = m.mk_fresh_const((p + "_exp_" + name).c_str(), s_exp);
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sgn = mk_fresh_const((p + "_sgn_" + name).c_str(), 1);
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s = mk_fresh_const((p + "_sig_" + name).c_str(), sbits - 1);
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e = mk_fresh_const((p + "_exp_" + name).c_str(), ebits);
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#else
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expr_ref bv(m);
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app_ref bv(m);
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unsigned bv_sz = 1 + ebits + (sbits - 1);
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bv = m.mk_fresh_const(0, m_bv_util.mk_sort(bv_sz));
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bv = mk_fresh_const(0, bv_sz);
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m_fresh_bv_variables.insert(bv);
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sgn = m_bv_util.mk_extract(bv_sz - 1, bv_sz - 1, bv);
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e = m_bv_util.mk_extract(bv_sz - 2, sbits - 1, bv);
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@ -196,7 +201,7 @@ void fpa2bv_converter::mk_uninterpreted_function(func_decl * f, unsigned num, ex
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if (is_float(args[i]))
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{
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expr * sgn, * sig, * exp;
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split(args[i], sgn, sig, exp);
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split_triple(args[i], sgn, sig, exp);
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new_args.push_back(sgn);
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new_args.push_back(sig);
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new_args.push_back(exp);
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@ -294,7 +299,7 @@ void fpa2bv_converter::mk_rm_const(func_decl * f, expr_ref & result) {
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expr_ref rcc(m);
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rcc = bu().mk_ule(result, bu().mk_numeral(4, 3));
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extra_assertions.push_back(rcc);
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m_extra_assertions.push_back(rcc);
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}
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}
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@ -612,7 +617,7 @@ void fpa2bv_converter::mk_sub(func_decl * f, unsigned num, expr * const * args,
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void fpa2bv_converter::mk_neg(func_decl * f, unsigned num, expr * const * args, expr_ref & result) {
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SASSERT(num == 1);
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expr * sgn, * s, * e;
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split(args[0], sgn, s, e);
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split_triple(args[0], sgn, s, e);
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expr_ref c(m), nsgn(m);
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mk_is_nan(args[0], c);
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nsgn = m_bv_util.mk_bv_not(sgn);
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@ -695,8 +700,7 @@ void fpa2bv_converter::mk_mul(func_decl * f, unsigned num, expr * const * args,
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// else comes the actual multiplication.
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unsigned ebits = m_util.get_ebits(f->get_range());
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unsigned sbits = m_util.get_sbits(f->get_range());
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SASSERT(ebits <= sbits);
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unsigned sbits = m_util.get_sbits(f->get_range());
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expr_ref a_sgn(m), a_sig(m), a_exp(m), a_lz(m), b_sgn(m), b_sig(m), b_exp(m), b_lz(m);
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unpack(x, a_sgn, a_sig, a_exp, a_lz, true);
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@ -1033,7 +1037,7 @@ void fpa2bv_converter::mk_rem(func_decl * f, unsigned num, expr * const * args,
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void fpa2bv_converter::mk_abs(func_decl * f, unsigned num, expr * const * args, expr_ref & result) {
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SASSERT(num == 1);
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expr * sgn, * s, * e;
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split(args[0], sgn, s, e);
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split_triple(args[0], sgn, s, e);
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mk_triple(m_bv_util.mk_numeral(0, 1), s, e, result);
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}
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@ -1044,8 +1048,8 @@ void fpa2bv_converter::mk_min(func_decl * f, unsigned num, expr * const * args,
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expr * x_sgn, * x_sig, * x_exp;
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expr * y_sgn, * y_sig, * y_exp;
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split(x, x_sgn, x_sig, x_exp);
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split(y, y_sgn, y_sig, y_exp);
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split_triple(x, x_sgn, x_sig, x_exp);
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split_triple(y, y_sgn, y_sig, y_exp);
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expr_ref c1(m), c2(m), x_is_nan(m), y_is_nan(m), x_is_zero(m), y_is_zero(m), c1_and(m);
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mk_is_zero(x, x_is_zero);
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@ -1087,8 +1091,8 @@ void fpa2bv_converter::mk_max(func_decl * f, unsigned num, expr * const * args,
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expr * x_sgn, * x_sig, * x_exp;
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expr * y_sgn, * y_sig, * y_exp;
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split(x, x_sgn, x_sig, x_exp);
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split(y, y_sgn, y_sig, y_exp);
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split_triple(x, x_sgn, x_sig, x_exp);
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split_triple(y, y_sgn, y_sig, y_exp);
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expr_ref c1(m), c2(m), x_is_nan(m), y_is_nan(m), y_is_zero(m), x_is_zero(m), c1_and(m);
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mk_is_zero(y, y_is_zero);
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@ -1225,11 +1229,9 @@ void fpa2bv_converter::mk_fma(func_decl * f, unsigned num, expr * const * args,
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m_simp.mk_and(z_is_zero, m.mk_not(rm_is_to_neg), ite_c);
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mk_ite(ite_c, pzero, z, v7);
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// else comes the fused multiplication.
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unsigned ebits = m_util.get_ebits(f->get_range());
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unsigned sbits = m_util.get_sbits(f->get_range());
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SASSERT(ebits <= sbits);
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expr_ref a_sgn(m), a_sig(m), a_exp(m), a_lz(m);
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expr_ref b_sgn(m), b_sig(m), b_exp(m), b_lz(m);
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@ -1482,7 +1484,6 @@ void fpa2bv_converter::mk_sqrt(func_decl * f, unsigned num, expr * const * args,
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// else comes the actual square root.
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unsigned ebits = m_util.get_ebits(f->get_range());
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unsigned sbits = m_util.get_sbits(f->get_range());
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SASSERT(ebits <= sbits);
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expr_ref a_sgn(m), a_sig(m), a_exp(m), a_lz(m);
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unpack(x, a_sgn, a_sig, a_exp, a_lz, true);
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@ -1698,8 +1699,8 @@ void fpa2bv_converter::mk_float_eq(func_decl * f, unsigned num, expr * const * a
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expr * x_sgn, * x_sig, * x_exp;
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expr * y_sgn, * y_sig, * y_exp;
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split(x, x_sgn, x_sig, x_exp);
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split(y, y_sgn, y_sig, y_exp);
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split_triple(x, x_sgn, x_sig, x_exp);
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split_triple(y, y_sgn, y_sig, y_exp);
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expr_ref x_eq_y_sgn(m), x_eq_y_exp(m), x_eq_y_sig(m);
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m_simp.mk_eq(x_sgn, y_sgn, x_eq_y_sgn);
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@ -1734,8 +1735,8 @@ void fpa2bv_converter::mk_float_lt(func_decl * f, unsigned num, expr * const * a
|
|||
|
||||
expr * x_sgn, * x_sig, * x_exp;
|
||||
expr * y_sgn, * y_sig, * y_exp;
|
||||
split(x, x_sgn, x_sig, x_exp);
|
||||
split(y, y_sgn, y_sig, y_exp);
|
||||
split_triple(x, x_sgn, x_sig, x_exp);
|
||||
split_triple(y, y_sgn, y_sig, y_exp);
|
||||
|
||||
expr_ref c3(m), t3(m), t4(m), one_1(m), nil_1(m);
|
||||
one_1 = m_bv_util.mk_numeral(1, 1);
|
||||
|
|
@ -1865,10 +1866,11 @@ void fpa2bv_converter::mk_to_fp(func_decl * f, unsigned num, expr * const * args
|
|||
if (num == 3 &&
|
||||
m_bv_util.is_bv(args[0]) &&
|
||||
m_bv_util.is_bv(args[1]) &&
|
||||
m_bv_util.is_bv(args[2])) {
|
||||
// Theoretically, the user could have thrown in it's own triple of bit-vectors.
|
||||
// Just keep it here, as there will be something else that uses it.
|
||||
mk_triple(args[0], args[1], args[2], result);
|
||||
m_bv_util.is_bv(args[2])) {
|
||||
SASSERT(m_bv_util.get_bv_size(args[0]) == 1);
|
||||
SASSERT(m_util.get_ebits(f->get_range()) == m_bv_util.get_bv_size(args[1]));
|
||||
SASSERT(m_util.get_sbits(f->get_range()) == m_bv_util.get_bv_size(args[2])+1);
|
||||
mk_triple(args[0], args[2], args[1], result);
|
||||
}
|
||||
else if (num == 2 &&
|
||||
m_bv_util.is_bv(args[0]) &&
|
||||
|
|
@ -2148,7 +2150,7 @@ void fpa2bv_converter::mk_to_fp(func_decl * f, unsigned num, expr * const * args
|
|||
else
|
||||
UNREACHABLE();
|
||||
|
||||
SASSERT(is_well_sorted(m, result));
|
||||
SASSERT(is_well_sorted(m, result));
|
||||
}
|
||||
|
||||
void fpa2bv_converter::mk_to_fp_signed(func_decl * f, unsigned num, expr * const * args, expr_ref & result) {
|
||||
|
|
@ -2306,13 +2308,40 @@ void fpa2bv_converter::mk_to_fp_unsigned(func_decl * f, unsigned num, expr * con
|
|||
void fpa2bv_converter::mk_to_ieee_bv(func_decl * f, unsigned num, expr * const * args, expr_ref & result) {
|
||||
SASSERT(num == 1);
|
||||
expr * sgn, * s, * e;
|
||||
split(args[0], sgn, s, e);
|
||||
split_triple(args[0], sgn, s, e);
|
||||
result = m_bv_util.mk_concat(m_bv_util.mk_concat(sgn, e), s);
|
||||
}
|
||||
void fpa2bv_converter::mk_internal_bvwrap(func_decl * f, unsigned num, expr * const * args, expr_ref & result) {
|
||||
TRACE("fpa2bv_internal", tout << "wrap ";
|
||||
for (unsigned i = 0; i < num; i++)
|
||||
tout << " " << mk_ismt2_pp(args[i], m);
|
||||
tout << std::endl;);
|
||||
SASSERT(num == 1);
|
||||
result = m.mk_app(f, num, args);
|
||||
}
|
||||
|
||||
void fpa2bv_converter::mk_internal_bvunwrap(func_decl * f, unsigned num, expr * const * args, expr_ref & result) {
|
||||
TRACE("fpa2bv_internal", tout << "unwrap ";
|
||||
for (unsigned i = 0; i < num; i++)
|
||||
tout << " " << mk_ismt2_pp(args[i], m);
|
||||
tout << std::endl;);
|
||||
SASSERT(num == 1);
|
||||
app * a0 = to_app(args[0]);
|
||||
SASSERT(a0->get_kind() == AST_APP);
|
||||
SASSERT(is_float_family(a0->get_decl()));
|
||||
decl_kind k = a0->get_decl_kind();
|
||||
SASSERT(k == OP_FLOAT_INTERNAL_BVWRAP);
|
||||
SASSERT(a0->get_num_args() == 1);
|
||||
result = a0->get_arg(0);
|
||||
}
|
||||
|
||||
void fpa2bv_converter::mk_fp(func_decl * f, unsigned num, expr * const * args, expr_ref & result) {
|
||||
SASSERT(num == 3);
|
||||
SASSERT(m_bv_util.get_bv_size(args[0]) == 1);
|
||||
SASSERT(m_util.get_sbits(f->get_range()) == m_bv_util.get_bv_size(args[2])+1);
|
||||
SASSERT(m_util.get_ebits(f->get_range()) == m_bv_util.get_bv_size(args[1]));
|
||||
mk_triple(args[0], args[2], args[1], result);
|
||||
TRACE("fpa2bv_mk_fp", tout << "mk_fp result = " << mk_ismt2_pp(result, m) << std::endl;);
|
||||
}
|
||||
|
||||
void fpa2bv_converter::mk_to_ubv(func_decl * f, unsigned num, expr * const * args, expr_ref & result) {
|
||||
|
|
@ -2328,7 +2357,7 @@ void fpa2bv_converter::mk_to_ubv(func_decl * f, unsigned num, expr * const * arg
|
|||
//expr * x = args[1];
|
||||
|
||||
//expr * sgn, *s, *e;
|
||||
//split(x, sgn, s, e);
|
||||
//split_triple(x, sgn, s, e);
|
||||
|
||||
NOT_IMPLEMENTED_YET();
|
||||
}
|
||||
|
|
@ -2346,7 +2375,7 @@ void fpa2bv_converter::mk_to_sbv(func_decl * f, unsigned num, expr * const * arg
|
|||
//expr * x = args[1];
|
||||
|
||||
//expr * sgn, *s, *e;
|
||||
//split(x, sgn, s, e);
|
||||
//split_triple(x, sgn, s, e);
|
||||
|
||||
NOT_IMPLEMENTED_YET();
|
||||
}
|
||||
|
|
@ -2440,18 +2469,28 @@ void fpa2bv_converter::mk_to_real(func_decl * f, unsigned num, expr * const * ar
|
|||
SASSERT(is_well_sorted(m, result));
|
||||
}
|
||||
|
||||
void fpa2bv_converter::split(expr * e, expr * & sgn, expr * & sig, expr * & exp) const {
|
||||
void fpa2bv_converter::split_triple(expr * e, expr * & sgn, expr * & sig, expr * & exp) const {
|
||||
SASSERT(is_app_of(e, m_plugin->get_family_id(), OP_FLOAT_TO_FP));
|
||||
SASSERT(to_app(e)->get_num_args() == 3);
|
||||
|
||||
sgn = to_app(e)->get_arg(0);
|
||||
sig = to_app(e)->get_arg(1);
|
||||
exp = to_app(e)->get_arg(2);
|
||||
sig = to_app(e)->get_arg(2);
|
||||
exp = to_app(e)->get_arg(1);
|
||||
}
|
||||
|
||||
void fpa2bv_converter::split_triple(expr * e, expr_ref & sgn, expr_ref & sig, expr_ref & exp) const {
|
||||
SASSERT(is_app_of(e, m_plugin->get_family_id(), OP_FLOAT_TO_FP));
|
||||
SASSERT(to_app(e)->get_num_args() == 3);
|
||||
expr *e_sgn, *e_sig, *e_exp;
|
||||
split_triple(e, e_sgn, e_sig, e_exp);
|
||||
sgn = e_sgn;
|
||||
sig = e_sig;
|
||||
exp = e_exp;
|
||||
}
|
||||
|
||||
void fpa2bv_converter::mk_is_nan(expr * e, expr_ref & result) {
|
||||
expr * sgn, * sig, * exp;
|
||||
split(e, sgn, sig, exp);
|
||||
split_triple(e, sgn, sig, exp);
|
||||
|
||||
// exp == 1^n , sig != 0
|
||||
expr_ref sig_is_zero(m), sig_is_not_zero(m), exp_is_top(m), top_exp(m), zero(m);
|
||||
|
|
@ -2466,7 +2505,7 @@ void fpa2bv_converter::mk_is_nan(expr * e, expr_ref & result) {
|
|||
|
||||
void fpa2bv_converter::mk_is_inf(expr * e, expr_ref & result) {
|
||||
expr * sgn, * sig, * exp;
|
||||
split(e, sgn, sig, exp);
|
||||
split_triple(e, sgn, sig, exp);
|
||||
expr_ref eq1(m), eq2(m), top_exp(m), zero(m);
|
||||
mk_top_exp(m_bv_util.get_bv_size(exp), top_exp);
|
||||
zero = m_bv_util.mk_numeral(0, m_bv_util.get_bv_size(sig));
|
||||
|
|
@ -2509,7 +2548,7 @@ void fpa2bv_converter::mk_is_neg(expr * e, expr_ref & result) {
|
|||
|
||||
void fpa2bv_converter::mk_is_zero(expr * e, expr_ref & result) {
|
||||
expr * sgn, * sig, * exp;
|
||||
split(e, sgn, sig, exp);
|
||||
split_triple(e, sgn, sig, exp);
|
||||
expr_ref eq1(m), eq2(m), bot_exp(m), zero(m);
|
||||
mk_bot_exp(m_bv_util.get_bv_size(exp), bot_exp);
|
||||
zero = m_bv_util.mk_numeral(0, m_bv_util.get_bv_size(sig));
|
||||
|
|
@ -2520,7 +2559,7 @@ void fpa2bv_converter::mk_is_zero(expr * e, expr_ref & result) {
|
|||
|
||||
void fpa2bv_converter::mk_is_nzero(expr * e, expr_ref & result) {
|
||||
expr * sgn, * sig, * exp;
|
||||
split(e, sgn, sig, exp);
|
||||
split_triple(e, sgn, sig, exp);
|
||||
expr_ref e_is_zero(m), eq(m), one_1(m);
|
||||
mk_is_zero(e, e_is_zero);
|
||||
one_1 = m_bv_util.mk_numeral(1, 1);
|
||||
|
|
@ -2530,7 +2569,7 @@ void fpa2bv_converter::mk_is_nzero(expr * e, expr_ref & result) {
|
|||
|
||||
void fpa2bv_converter::mk_is_pzero(expr * e, expr_ref & result) {
|
||||
expr * sgn, * sig, * exp;
|
||||
split(e, sgn, sig, exp);
|
||||
split_triple(e, sgn, sig, exp);
|
||||
expr_ref e_is_zero(m), eq(m), nil_1(m);
|
||||
mk_is_zero(e, e_is_zero);
|
||||
nil_1 = m_bv_util.mk_numeral(0, 1);
|
||||
|
|
@ -2540,7 +2579,7 @@ void fpa2bv_converter::mk_is_pzero(expr * e, expr_ref & result) {
|
|||
|
||||
void fpa2bv_converter::mk_is_denormal(expr * e, expr_ref & result) {
|
||||
expr * sgn, * sig, * exp;
|
||||
split(e, sgn, sig, exp);
|
||||
split_triple(e, sgn, sig, exp);
|
||||
expr_ref zero(m);
|
||||
zero = m_bv_util.mk_numeral(0, m_bv_util.get_bv_size(exp));
|
||||
m_simp.mk_eq(exp, zero, result);
|
||||
|
|
@ -2548,7 +2587,7 @@ void fpa2bv_converter::mk_is_denormal(expr * e, expr_ref & result) {
|
|||
|
||||
void fpa2bv_converter::mk_is_normal(expr * e, expr_ref & result) {
|
||||
expr * sgn, * sig, * exp;
|
||||
split(e, sgn, sig, exp);
|
||||
split_triple(e, sgn, sig, exp);
|
||||
|
||||
expr_ref is_special(m), is_denormal(m), p(m);
|
||||
mk_is_denormal(e, is_denormal);
|
||||
|
|
@ -2670,9 +2709,7 @@ void fpa2bv_converter::unpack(expr * e, expr_ref & sgn, expr_ref & sig, expr_ref
|
|||
unsigned sbits = m_util.get_sbits(srt);
|
||||
unsigned ebits = m_util.get_ebits(srt);
|
||||
|
||||
sgn = to_app(e)->get_arg(0);
|
||||
sig = to_app(e)->get_arg(1);
|
||||
exp = to_app(e)->get_arg(2);
|
||||
split_triple(e, sgn, sig, exp);
|
||||
|
||||
expr_ref is_normal(m);
|
||||
mk_is_normal(e, is_normal);
|
||||
|
|
@ -2684,7 +2721,7 @@ void fpa2bv_converter::unpack(expr * e, expr_ref & sgn, expr_ref & sig, expr_ref
|
|||
|
||||
expr_ref denormal_sig(m), denormal_exp(m);
|
||||
denormal_sig = m_bv_util.mk_zero_extend(1, sig);
|
||||
SASSERT(ebits >= 3); // Note: when ebits=2 there is no 1-exponent, so mk_unbias will produce a 0.
|
||||
// SASSERT(ebits >= 3); // Note: when ebits=2 there is no 1-exponent, so mk_unbias will produce a 0.
|
||||
denormal_exp = m_bv_util.mk_numeral(1, ebits);
|
||||
mk_unbias(denormal_exp, denormal_exp);
|
||||
dbg_decouple("fpa2bv_unpack_denormal_exp", denormal_exp);
|
||||
|
|
@ -2772,7 +2809,7 @@ void fpa2bv_converter::dbg_decouple(const char * prefix, expr_ref & e) {
|
|||
// CMW: This works only for quantifier-free formulas.
|
||||
expr_ref new_e(m);
|
||||
new_e = m.mk_fresh_const(prefix, m.get_sort(e));
|
||||
extra_assertions.push_back(m.mk_eq(new_e, e));
|
||||
m_extra_assertions.push_back(m.mk_eq(new_e, e));
|
||||
e = new_e;
|
||||
#endif
|
||||
}
|
||||
|
|
@ -2802,7 +2839,6 @@ void fpa2bv_converter::round(sort * s, expr_ref & rm, expr_ref & sgn, expr_ref &
|
|||
// i.e., it has 2 + (sbits-1) + 3 = sbits + 4 bits, where the first one is in sgn.
|
||||
// Furthermore, note that sig is an unsigned bit-vector, while exp is signed.
|
||||
|
||||
SASSERT(ebits <= sbits);
|
||||
SASSERT(m_bv_util.is_bv(rm) && m_bv_util.get_bv_size(rm) == 3);
|
||||
SASSERT(m_bv_util.is_bv(sgn) && m_bv_util.get_bv_size(sgn) == 1);
|
||||
SASSERT(m_bv_util.is_bv(sig) && m_bv_util.get_bv_size(sig) >= 5);
|
||||
|
|
|
|||
|
|
@ -42,6 +42,7 @@ struct func_decl_triple {
|
|||
};
|
||||
|
||||
class fpa2bv_converter {
|
||||
protected:
|
||||
ast_manager & m;
|
||||
basic_simplifier_plugin m_simp;
|
||||
float_util m_util;
|
||||
|
|
@ -73,16 +74,19 @@ public:
|
|||
SASSERT(m_bv_util.is_bv(sign) && m_bv_util.get_bv_size(sign) == 1);
|
||||
SASSERT(m_bv_util.is_bv(significand));
|
||||
SASSERT(m_bv_util.is_bv(exponent));
|
||||
result = m.mk_app(m_util.get_family_id(), OP_FLOAT_TO_FP, sign, significand, exponent);
|
||||
result = m.mk_app(m_util.get_family_id(), OP_FLOAT_TO_FP, sign, exponent, significand);
|
||||
}
|
||||
|
||||
void split_triple(expr * e, expr * & sgn, expr * & sig, expr * & exp) const;
|
||||
void split_triple(expr * e, expr_ref & sgn, expr_ref & sig, expr_ref & exp) const;
|
||||
|
||||
void mk_eq(expr * a, expr * b, expr_ref & result);
|
||||
void mk_ite(expr * c, expr * t, expr * f, expr_ref & result);
|
||||
|
||||
void mk_rounding_mode(func_decl * f, expr_ref & result);
|
||||
void mk_value(func_decl * f, unsigned num, expr * const * args, expr_ref & result);
|
||||
void mk_const(func_decl * f, expr_ref & result);
|
||||
void mk_rm_const(func_decl * f, expr_ref & result);
|
||||
virtual void mk_const(func_decl * f, expr_ref & result);
|
||||
virtual void mk_rm_const(func_decl * f, expr_ref & result);
|
||||
void mk_uninterpreted_function(func_decl * f, unsigned num, expr * const * args, expr_ref & result);
|
||||
void mk_var(unsigned base_inx, sort * srt, expr_ref & result);
|
||||
|
||||
|
|
@ -138,11 +142,11 @@ public:
|
|||
obj_map<func_decl, func_decl_triple> const & uf23bvuf() const { return m_uf23bvuf; }
|
||||
|
||||
void dbg_decouple(const char * prefix, expr_ref & e);
|
||||
expr_ref_vector extra_assertions;
|
||||
expr_ref_vector m_extra_assertions;
|
||||
|
||||
void mk_internal_bvwrap(func_decl * f, unsigned num, expr * const * args, expr_ref & result);
|
||||
void mk_internal_bvunwrap(func_decl * f, unsigned num, expr * const * args, expr_ref & result);
|
||||
protected:
|
||||
void split(expr * e, expr * & sgn, expr * & sig, expr * & exp) const;
|
||||
|
||||
void mk_is_nan(expr * e, expr_ref & result);
|
||||
void mk_is_inf(expr * e, expr_ref & result);
|
||||
void mk_is_pinf(expr * e, expr_ref & result);
|
||||
|
|
@ -173,6 +177,8 @@ protected:
|
|||
void add_core(unsigned sbits, unsigned ebits, expr_ref & rm,
|
||||
expr_ref & c_sgn, expr_ref & c_sig, expr_ref & c_exp, expr_ref & d_sgn, expr_ref & d_sig, expr_ref & d_exp,
|
||||
expr_ref & res_sgn, expr_ref & res_sig, expr_ref & res_exp);
|
||||
|
||||
app * mk_fresh_const(char const * prefix, unsigned sz);
|
||||
};
|
||||
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -150,6 +150,8 @@ struct fpa2bv_rewriter_cfg : public default_rewriter_cfg {
|
|||
case OP_FLOAT_TO_SBV: m_conv.mk_to_sbv(f, num, args, result); return BR_DONE;
|
||||
case OP_FLOAT_TO_REAL: m_conv.mk_to_real(f, num, args, result); return BR_DONE;
|
||||
case OP_FLOAT_TO_IEEE_BV: m_conv.mk_to_ieee_bv(f, num, args, result); return BR_DONE;
|
||||
case OP_FLOAT_INTERNAL_BVWRAP: m_conv.mk_internal_bvwrap(f, num, args, result); return BR_DONE;
|
||||
case OP_FLOAT_INTERNAL_BVUNWRAP: m_conv.mk_internal_bvunwrap(f, num, args, result); return BR_DONE;
|
||||
default:
|
||||
TRACE("fpa2bv", tout << "unsupported operator: " << f->get_name() << "\n";
|
||||
for (unsigned i = 0; i < num; i++) tout << mk_ismt2_pp(args[i], m()) << std::endl;);
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue