mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2025-04-28 19:35:50 +00:00
Code Activity

include nyis

Browse source
This commit is contained in:
Nikolaj Bjorner 2023-12-12 18:00:43 -08:00
parent 34229eaa8e
commit c6a8ae1e8c
4 changed files with 50 additions and 27 deletions
Download patch file Download diff file Expand all files Collapse all files

56
src/sat/smt/intblast_solver.cpp
View file

@ -574,14 +574,16 @@ namespace intblast {
r = a.mk_int(val);
break;
}
case OP_BUREM:
case OP_BUREM_I: {
expr* x = arg(0), * y = arg(1);
r = m.mk_ite(m.mk_eq(y, a.mk_int(0)), a.mk_int(0), a.mk_mod(x, y));
r = m.mk_ite(m.mk_eq(y, a.mk_int(0)), x, a.mk_mod(x, y));
break;
}
case OP_BUDIV:
case OP_BUDIV_I: {
expr* x = arg(0), * y = arg(1);
r = m.mk_ite(m.mk_eq(y, a.mk_int(0)), a.mk_int(0), a.mk_idiv(x, umod(bv_expr, 1)));
r = m.mk_ite(m.mk_eq(y, a.mk_int(0)), a.mk_int(1), a.mk_idiv(x, umod(bv_expr, 1)));
break;
}
case OP_BUMUL_NO_OVFL: {
@ -634,24 +636,6 @@ namespace intblast {
r = bnot(r);
break;
}
case OP_BUDIV: {
bv_rewriter_params p(ctx.s().params());
expr* x = arg(0), * y = umod(e, 1);
if (p.hi_div0())
r = m.mk_ite(m.mk_eq(y, a.mk_int(0)), a.mk_int(0), a.mk_idiv(x, y));
else
r = a.mk_idiv(x, y);
break;
}
case OP_BUREM: {
bv_rewriter_params p(ctx.s().params());
expr* x = arg(0), * y = umod(e, 1);
if (p.hi_div0())
r = m.mk_ite(m.mk_eq(y, a.mk_int(0)), a.mk_int(0), y);
else
r = a.mk_mod(x, y);
break;
}
case OP_BASHR: {
//
// ashr(x, y)
@ -702,6 +686,36 @@ namespace intblast {
bv_expr = e->get_arg(0);
r = m.mk_ite(m.mk_eq(umod(bv_expr, 0), umod(bv_expr, 1)), a.mk_int(1), a.mk_int(0));
break;
case OP_BSMOD: {
bv_expr = e;
expr* x = umod(bv_expr, 0), *y = umod(bv_expr, 0);
rational N = rational::power_of_two(bv.get_bv_size(bv_expr));
expr* signx = a.mk_ge(x, a.mk_int(N/2));
expr* signy = a.mk_ge(y, a.mk_int(N/2));
expr* u = a.mk_mod(x, y);
// x < 0, y < 0 -> r = -u
// x < 0, y >= 0 -> r = y - u
// x >= 0, y < 0 -> r = y + u
// x >= 0, y >= 0 -> r = u
// u = 0 -> r = 0
// y = 0 -> r = x
r = a.mk_uminus(u);
r = m.mk_ite(m.mk_and(m.mk_not(signx), signy), a.mk_add(u, y), r);
r = m.mk_ite(m.mk_and(signx, m.mk_not(signy)), a.mk_sub(y, u), r);
r = m.mk_ite(m.mk_and(m.mk_not(signx), m.mk_not(signy)), u, r);
r = m.mk_ite(m.mk_eq(u, a.mk_int(0)), a.mk_int(0), r);
r = m.mk_ite(m.mk_eq(y, a.mk_int(0)), x, r);
break;
}
case OP_BSDIV: {
// y = 0, x > 0 -> 1
// y = 0, x <= 0 -> -1
// y != 0 -> machine_div(x, y)
#if 0
#endif
}
case OP_ROTATE_LEFT:
case OP_ROTATE_RIGHT:
case OP_EXT_ROTATE_LEFT:
@ -709,9 +723,7 @@ namespace intblast {
case OP_REPEAT:
case OP_BREDOR:
case OP_BREDAND:
case OP_BSDIV:
case OP_BSREM:
case OP_BSMOD:
verbose_stream() << mk_pp(e, m) << "\n";
NOT_IMPLEMENTED_YET();
break;