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FPA theory support for conversion functions

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Signed-off-by: Christoph M. Wintersteiger <cwinter@microsoft.com>
This commit is contained in:
Christoph M. Wintersteiger 2014-12-28 19:28:48 +00:00
parent 621be0f47f
commit 05121e25d4
5 changed files with 107 additions and 19 deletions
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12
src/ast/fpa/fpa2bv_converter.cpp
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@ -2487,10 +2487,13 @@ void fpa2bv_converter::mk_to_ubv(func_decl * f, unsigned num, expr * const * arg
mk_is_neg(x, x_is_neg);
mk_is_nzero(x, x_is_nzero);
expr_ref undef(m);
undef = m_util.mk_internal_to_ubv_unspecified(bv_sz);
// NaN, Inf, or negative (except -0) -> undefined
expr_ref c1(m), v1(m);
c1 = m.mk_or(x_is_nan, x_is_inf, m.mk_and(x_is_neg, m.mk_not(x_is_nzero)));
v1 = mk_fresh_const(0, bv_sz);
v1 = undef;
dbg_decouple("fpa2bv_to_ubv_c1", c1);
// +-Zero -> 0
@ -2546,9 +2549,10 @@ void fpa2bv_converter::mk_to_ubv(func_decl * f, unsigned num, expr * const * arg
dbg_decouple("fpa2bv_to_ubv_shifted_sig", shifted_sig);
expr_ref rounded(m);
rounded = shifted_sig; // TODO.
// TODO: Rounding.
rounded = shifted_sig;
result = m.mk_ite(c_in_limits, rounded, mk_fresh_const(0, bv_sz));
result = m.mk_ite(c_in_limits, rounded, undef);
result = m.mk_ite(c2, v2, result);
result = m.mk_ite(c1, v1, result);
@ -2658,7 +2662,7 @@ void fpa2bv_converter::mk_to_real(func_decl * f, unsigned num, expr * const * ar
tout << "exp2 = " << mk_ismt2_pp(exp2, m) << std::endl;);
expr_ref undef(m);
undef = m.mk_fresh_const(0, rs);
undef = m_util.mk_internal_to_real_unspecified();
result = m.mk_ite(x_is_zero, zero, res);
result = m.mk_ite(x_is_inf, undef, result);

4
src/ast/fpa/fpa2bv_converter.h
View file

@ -149,6 +149,10 @@ public:
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);
void mk_internal_to_ubv_unspecified(func_decl * f, unsigned num, expr * const * args, expr_ref & result);
void mk_internal_to_sbv_unspecified(func_decl * f, unsigned num, expr * const * args, expr_ref & result);
void mk_internal_to_real_unspecified(func_decl * f, unsigned num, expr * const * args, expr_ref & result);
protected:
void mk_is_nan(expr * e, expr_ref & result);