diff --git a/src/tactic/fpa/fpa2bv_converter.cpp b/src/tactic/fpa/fpa2bv_converter.cpp index 2d1d6705f..533988689 100644 --- a/src/tactic/fpa/fpa2bv_converter.cpp +++ b/src/tactic/fpa/fpa2bv_converter.cpp @@ -872,8 +872,19 @@ void fpa2bv_converter::mk_div(func_decl * f, unsigned num, expr * const * args, sticky = m.mk_app(m_bv_util.get_fid(), OP_BREDOR, m_bv_util.mk_extract(extra_bits-2, 0, quotient)); res_sig = m_bv_util.mk_concat(m_bv_util.mk_extract(extra_bits+sbits+1, extra_bits-1, quotient), sticky); - SASSERT(m_bv_util.get_bv_size(res_sig) == (sbits + 4)); + SASSERT(m_bv_util.get_bv_size(res_sig) == (sbits + 4)); + expr_ref res_sig_lz(m); + mk_leading_zeros(res_sig, sbits + 4, res_sig_lz); + dbg_decouple("fpa2bv_div_res_sig_lz", res_sig_lz); + expr_ref res_sig_shift_amount(m); + res_sig_shift_amount = m_bv_util.mk_bv_sub(res_sig_lz, m_bv_util.mk_numeral(1, sbits + 4)); + dbg_decouple("fpa2bv_div_res_sig_shift_amount", res_sig_shift_amount); + expr_ref shift_cond(m); + shift_cond = m_bv_util.mk_ule(res_sig_lz, m_bv_util.mk_numeral(1, sbits + 4)); + m_simp.mk_ite(shift_cond, res_sig, m_bv_util.mk_bv_shl(res_sig, res_sig_shift_amount), res_sig); + m_simp.mk_ite(shift_cond, res_exp, m_bv_util.mk_bv_sub(res_exp, m_bv_util.mk_extract(ebits+1, 0, res_sig_shift_amount)), res_exp); + round(f->get_range(), rm, res_sgn, res_sig, res_exp, v8); // And finally, we tie them together.