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Added FP to_ieee_bv to fpa_rewriter to enable model evaluation.

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This commit is contained in:
Christoph M. Wintersteiger 2015-09-16 12:57:05 +01:00
parent 46e24e094c
commit 79d69cd5f0
8 changed files with 71 additions and 16 deletions
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47
src/ast/rewriter/fpa_rewriter.cpp
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@ -90,8 +90,8 @@ br_status fpa_rewriter::mk_app_core(func_decl * f, unsigned num_args, expr * con
case OP_FPA_TO_FP_UNSIGNED: SASSERT(num_args == 2); st = mk_to_fp_unsigned(f, args[0], args[1], result); break;
case OP_FPA_TO_UBV: SASSERT(num_args == 2); st = mk_to_ubv(f, args[0], args[1], result); break;
case OP_FPA_TO_SBV: SASSERT(num_args == 2); st = mk_to_sbv(f, args[0], args[1], result); break;
case OP_FPA_TO_REAL: SASSERT(num_args == 1); st = mk_to_real(args[0], result); break;
case OP_FPA_TO_IEEE_BV: SASSERT(num_args == 1); st = mk_to_ieee_bv(args[0], result); break;
case OP_FPA_TO_IEEE_BV: SASSERT(num_args == 1); st = mk_to_ieee_bv(f, args[0], result); break;
case OP_FPA_TO_REAL: SASSERT(num_args == 1); st = mk_to_real(args[0], result); break;
case OP_FPA_INTERNAL_TO_UBV_UNSPECIFIED:
SASSERT(num_args == 0); st = mk_to_ubv_unspecified(f, result); break;
@ -121,7 +121,7 @@ br_status fpa_rewriter::mk_to_ubv_unspecified(func_decl * f, expr_ref & result)
// The "hardware interpretation" is 0.
result = bu.mk_numeral(0, bv_sz);
else
result = m_util.mk_internal_to_real_unspecified();
result = m_util.mk_internal_to_ubv_unspecified(bv_sz);
return BR_DONE;
}
@ -136,7 +136,22 @@ br_status fpa_rewriter::mk_to_sbv_unspecified(func_decl * f, expr_ref & result)
// The "hardware interpretation" is 0.
result = bu.mk_numeral(0, bv_sz);
else
result = m_util.mk_internal_to_real_unspecified();
result = m_util.mk_internal_to_sbv_unspecified(bv_sz);
return BR_DONE;
}
br_status fpa_rewriter::mk_to_ieee_bv_unspecified(func_decl * f, expr_ref & result) {
SASSERT(f->get_num_parameters() == 1);
SASSERT(f->get_parameter(0).is_int());
unsigned bv_sz = f->get_parameter(0).get_int();
bv_util bu(m());
if (m_hi_fp_unspecified)
// The "hardware interpretation" is 0.
result = bu.mk_numeral(0, bv_sz);
else
result = m_util.mk_internal_to_ieee_bv_unspecified(bv_sz);
return BR_DONE;
}
@ -698,10 +713,6 @@ br_status fpa_rewriter::mk_eq_core(expr * arg1, expr * arg2, expr_ref & result)
return BR_FAILED;
}
br_status fpa_rewriter::mk_to_ieee_bv(expr * arg1, expr_ref & result) {
return BR_FAILED;
}
br_status fpa_rewriter::mk_fp(expr * arg1, expr * arg2, expr * arg3, expr_ref & result) {
unsynch_mpz_manager & mpzm = m_fm.mpz_manager();
bv_util bu(m());
@ -794,6 +805,26 @@ br_status fpa_rewriter::mk_to_sbv(func_decl * f, expr * arg1, expr * arg2, expr_
return BR_FAILED;
}
br_status fpa_rewriter::mk_to_ieee_bv(func_decl * f, expr * arg, expr_ref & result) {
scoped_mpf v(m_fm);
if (m_util.is_numeral(arg, v)) {
if (m_fm.is_nan(v) || m_fm.is_inf(v)) {
mk_to_ieee_bv_unspecified(f, result);
return BR_REWRITE_FULL;
}
bv_util bu(m());
scoped_mpz rz(m_fm.mpq_manager());
m_fm.to_ieee_bv_mpz(v, rz);
result = bu.mk_numeral(rational(rz), v.get().get_ebits() + v.get().get_sbits());
return BR_DONE;
}
return BR_FAILED;
}
br_status fpa_rewriter::mk_to_real(expr * arg, expr_ref & result) {
scoped_mpf v(m_fm);