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Partial refactoring of fpa2bv conversion to support proofs.

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This commit is contained in:
Christoph M. Wintersteiger 2015-10-20 18:32:31 +01:00
parent 099775947e
commit ca496f20cb
9 changed files with 152 additions and 84 deletions
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23
src/ast/rewriter/fpa_rewriter.cpp
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@ -99,6 +99,8 @@ br_status fpa_rewriter::mk_app_core(func_decl * f, unsigned num_args, expr * con
case OP_FPA_INTERNAL_MAX_UNSPECIFIED:
SASSERT(num_args == 2); st = BR_FAILED; break;
case OP_FPA_INTERNAL_RM:
SASSERT(num_args == 1); st = mk_rm(args[0], result); break;
case OP_FPA_INTERNAL_TO_UBV_UNSPECIFIED:
SASSERT(num_args == 0); st = mk_to_ubv_unspecified(f, result); break;
case OP_FPA_INTERNAL_TO_SBV_UNSPECIFIED:
@ -719,6 +721,27 @@ br_status fpa_rewriter::mk_eq_core(expr * arg1, expr * arg2, expr_ref & result)
return BR_FAILED;
}
br_status fpa_rewriter::mk_rm(expr * arg, expr_ref & result) {
bv_util bu(m());
rational bv_val;
unsigned sz = 0;
if (bu.is_numeral(arg, bv_val, sz)) {
SASSERT(bv_val.is_uint64());
switch (bv_val.get_uint64()) {
case BV_RM_TIES_TO_AWAY: result = m_util.mk_round_nearest_ties_to_away(); break;
case BV_RM_TIES_TO_EVEN: result = m_util.mk_round_nearest_ties_to_even(); break;
case BV_RM_TO_NEGATIVE: result = m_util.mk_round_toward_negative(); break;
case BV_RM_TO_POSITIVE: result = m_util.mk_round_toward_positive(); break;
case BV_RM_TO_ZERO:
default: result = m_util.mk_round_toward_zero();
}
return BR_DONE;
}
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());