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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
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Leonardo de Moura 2012-10-02 11:35:25 -07:00
parent 3f9edad676
commit e9eab22e5c
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/*++
Copyright (c) 2011 Microsoft Corporation
Module Name:
bv_rewriter.h
Abstract:
Basic rewriting rules for bit-vectors
Author:
Leonardo (leonardo) 2011-04-14
Notes:
--*/
#ifndef _BV_REWRITER_H_
#define _BV_REWRITER_H_
#include"poly_rewriter.h"
#include"bv_decl_plugin.h"
#include"arith_decl_plugin.h"
class mk_extract_proc {
bv_util & m_util;
unsigned m_high;
unsigned m_low;
sort * m_domain;
func_decl * m_f_cached;
public:
mk_extract_proc(bv_util & u);
~mk_extract_proc();
app * operator()(unsigned high, unsigned low, expr * arg);
};
class bv_rewriter_core {
protected:
typedef rational numeral;
bv_util m_util;
ast_manager & m() const { return m_util.get_manager(); }
family_id get_fid() const { return m_util.get_family_id(); }
bool is_numeral(expr * n) const { return m_util.is_numeral(n); }
bool is_numeral(expr * n, numeral & r) const { unsigned sz; return m_util.is_numeral(n, r, sz); }
bool is_zero(expr * n) const { return m_util.is_zero(n); }
bool is_minus_one(expr * n) const { return m_util.is_allone(n); }
void normalize(numeral & c, sort * s) { unsigned bv_size = m_util.get_bv_size(s); c = m_util.norm(c, bv_size); }
app * mk_numeral(numeral const & r, sort * s) { return m_util.mk_numeral(r, s); }
decl_kind add_decl_kind() const { return OP_BADD; }
decl_kind mul_decl_kind() const { return OP_BMUL; }
bool use_power() const { return false; }
decl_kind power_decl_kind() const { UNREACHABLE(); return static_cast<decl_kind>(UINT_MAX); }
public:
bv_rewriter_core(ast_manager & m):m_util(m) {}
};
class bv_rewriter : public poly_rewriter<bv_rewriter_core> {
mk_extract_proc m_mk_extract;
arith_util m_autil;
bool m_hi_div0;
bool m_elim_sign_ext;
bool m_mul2concat;
bool m_bit2bool;
bool m_blast_eq_value;
bool m_mkbv2num;
bool m_split_concat_eq;
bool m_udiv2mul;
bool is_zero_bit(expr * x, unsigned idx);
br_status mk_ule(expr * a, expr * b, expr_ref & result);
br_status mk_uge(expr * a, expr * b, expr_ref & result);
br_status mk_ult(expr * a, expr * b, expr_ref & result);
br_status mk_sle(expr * a, expr * b, expr_ref & result);
br_status mk_sge(expr * a, expr * b, expr_ref & result);
br_status mk_slt(expr * a, expr * b, expr_ref & result);
br_status mk_leq_core(bool is_signed, expr * a, expr * b, expr_ref & result);
br_status mk_concat(unsigned num_args, expr * const * args, expr_ref & result);
br_status mk_extract(unsigned high, unsigned low, expr * arg, expr_ref & result);
br_status mk_repeat(unsigned n, expr * arg, expr_ref & result);
br_status mk_zero_extend(unsigned n, expr * arg, expr_ref & result);
br_status mk_sign_extend(unsigned n, expr * arg, expr_ref & result);
br_status mk_bv_not(expr * arg, expr_ref & result);
br_status mk_bv_or(unsigned num, expr * const * args, expr_ref & result);
br_status mk_bv_xor(unsigned num, expr * const * args, expr_ref & result);
br_status mk_bv_and(unsigned num, expr * const * args, expr_ref & result);
br_status mk_bv_nand(unsigned num, expr * const * args, expr_ref & result);
br_status mk_bv_nor(unsigned num, expr * const * args, expr_ref & result);
br_status mk_bv_xnor(unsigned num_args, expr * const * args, expr_ref & result);
br_status mk_bv_rotate_left(unsigned n, expr * arg, expr_ref & result);
br_status mk_bv_rotate_right(unsigned n, expr * arg, expr_ref & result);
br_status mk_bv_ext_rotate_left(expr * arg1, expr * arg2, expr_ref & result);
br_status mk_bv_ext_rotate_right(expr * arg1, expr * arg2, expr_ref & result);
br_status mk_bv_add(unsigned num_args, expr * const * args, expr_ref & result);
br_status mk_bv_add(expr * arg1, expr * arg2, expr_ref & result) {
expr * args[2] = { arg1, arg2 };
return mk_bv_add(2, args, result);
}
br_status mk_bv_mul(unsigned num_args, expr * const * args, expr_ref & result);
br_status mk_bv_shl(expr * arg1, expr * arg2, expr_ref & result);
br_status mk_bv_lshr(expr * arg1, expr * arg2, expr_ref & result);
br_status mk_bv_ashr(expr * arg1, expr * arg2, expr_ref & result);
bool is_minus_one_core(expr * arg) const;
bool is_x_minus_one(expr * arg, expr * & x);
br_status mk_bv_sdiv_core(expr * arg1, expr * arg2, bool hi_div0, expr_ref & result);
br_status mk_bv_udiv_core(expr * arg1, expr * arg2, bool hi_div0, expr_ref & result);
br_status mk_bv_srem_core(expr * arg1, expr * arg2, bool hi_div0, expr_ref & result);
br_status mk_bv_urem_core(expr * arg1, expr * arg2, bool hi_div0, expr_ref & result);
br_status mk_bv_smod_core(expr * arg1, expr * arg2, bool hi_div0, expr_ref & result);
br_status mk_bv_sdiv(expr * arg1, expr * arg2, expr_ref & result) { return mk_bv_sdiv_core(arg1, arg2, m_hi_div0, result); }
br_status mk_bv_udiv(expr * arg1, expr * arg2, expr_ref & result) { return mk_bv_udiv_core(arg1, arg2, m_hi_div0, result); }
br_status mk_bv_srem(expr * arg1, expr * arg2, expr_ref & result) { return mk_bv_srem_core(arg1, arg2, m_hi_div0, result); }
br_status mk_bv_urem(expr * arg1, expr * arg2, expr_ref & result) { return mk_bv_urem_core(arg1, arg2, m_hi_div0, result); }
br_status mk_bv_smod(expr * arg1, expr * arg2, expr_ref & result) { return mk_bv_smod_core(arg1, arg2, m_hi_div0, result); }
br_status mk_bv_sdiv_i(expr * arg1, expr * arg2, expr_ref & result) { return mk_bv_sdiv_core(arg1, arg2, true, result); }
br_status mk_bv_udiv_i(expr * arg1, expr * arg2, expr_ref & result) { return mk_bv_udiv_core(arg1, arg2, true, result); }
br_status mk_bv_srem_i(expr * arg1, expr * arg2, expr_ref & result) { return mk_bv_srem_core(arg1, arg2, true, result); }
br_status mk_bv_urem_i(expr * arg1, expr * arg2, expr_ref & result) { return mk_bv_urem_core(arg1, arg2, true, result); }
br_status mk_bv_smod_i(expr * arg1, expr * arg2, expr_ref & result) { return mk_bv_smod_core(arg1, arg2, true, result); }
br_status mk_int2bv(unsigned bv_size, expr * arg, expr_ref & result);
br_status mk_bv2int(expr * arg, expr_ref & result);
br_status mk_bv_redor(expr * arg, expr_ref & result);
br_status mk_bv_redand(expr * arg, expr_ref & result);
br_status mk_bv_comp(expr * arg1, expr * arg2, expr_ref & result);
br_status mk_bit2bool(expr * lhs, expr * rhs, expr_ref & result);
br_status mk_blast_eq_value(expr * lhs, expr * rhs, expr_ref & result);
br_status mk_eq_concat(expr * lhs, expr * rhs, expr_ref & result);
br_status mk_mkbv(unsigned num, expr * const * args, expr_ref & result);
bool is_minus_one_times_t(expr * arg);
void mk_t1_add_t2_eq_c(expr * t1, expr * t2, expr * c, expr_ref & result);
bool is_concat_split_target(expr * t) const;
br_status mk_mul_eq(expr * lhs, expr * rhs, expr_ref & result);
void updt_local_params(params_ref const & p);
public:
bv_rewriter(ast_manager & m, params_ref const & p = params_ref()):
poly_rewriter<bv_rewriter_core>(m, p),
m_mk_extract(m_util),
m_autil(m) {
updt_local_params(p);
}
void updt_params(params_ref const & p);
static void get_param_descrs(param_descrs & r);
void set_mkbv2num(bool f) { m_mkbv2num = f; }
unsigned get_bv_size(expr * t) const {return m_util.get_bv_size(t); }
bool is_numeral(expr * t) const { return m_util.is_numeral(t); }
bool is_numeral(expr * t, numeral & r, unsigned & sz) const { return m_util.is_numeral(t, r, sz); }
bool is_bv(expr * t) const { return m_util.is_bv(t); }
expr * mk_numeral(numeral const & v, unsigned sz) { return m_util.mk_numeral(v, sz); }
expr * mk_numeral(unsigned v, unsigned sz) { return m_util.mk_numeral(numeral(v), sz); }
br_status mk_app_core(func_decl * f, unsigned num_args, expr * const * args, expr_ref & result);
void mk_app(func_decl * f, unsigned num_args, expr * const * args, expr_ref & result) {
if (mk_app_core(f, num_args, args, result) == BR_FAILED)
result = m().mk_app(f, num_args, args);
}
br_status mk_eq_core(expr * lhs, expr * rhs, expr_ref & result);
};
#endif