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Eliminated the remaining operator kinds for partially unspecified FP operators.

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This commit is contained in:
Christoph M. Wintersteiger 2017-09-20 20:16:09 +01:00
parent cb15473d5b
commit cc9f67267d
10 changed files with 125 additions and 340 deletions
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76
src/ast/rewriter/fpa_rewriter.cpp
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@ -94,12 +94,6 @@ br_status fpa_rewriter::mk_app_core(func_decl * f, unsigned num_args, expr * con
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_MIN_I:SASSERT(num_args == 2); st = mk_min_i(f, args[0], args[1], result); break;
case OP_FPA_MAX_I: SASSERT(num_args == 2); st = mk_max_i(f, args[0], args[1], result); break;
case OP_FPA_MIN_UNSPECIFIED:
case OP_FPA_MAX_UNSPECIFIED:
SASSERT(num_args == 2); st = BR_FAILED; break;
case OP_FPA_BVWRAP: SASSERT(num_args == 1); st = mk_bvwrap(args[0], result); break;
case OP_FPA_BV2RM: SASSERT(num_args == 1); st = mk_bv2rm(args[0], result); break;
@ -385,38 +379,13 @@ br_status fpa_rewriter::mk_min(expr * arg1, expr * arg2, expr_ref & result) {
}
scoped_mpf v1(m_fm), v2(m_fm);
if (m_util.is_numeral(arg1, v1) && m_util.is_numeral(arg2, v2)) {
if (m_fm.is_zero(v1) && m_fm.is_zero(v2) && m_fm.sgn(v1) != m_fm.sgn(v2)) {
result = m().mk_app(get_fid(), OP_FPA_MIN_UNSPECIFIED, arg1, arg2);
return BR_REWRITE1;
}
else {
scoped_mpf r(m_fm);
m_fm.minimum(v1, v2, r);
result = m_util.mk_value(r);
return BR_DONE;
}
}
else {
expr_ref c(m()), v(m());
c = m().mk_and(m().mk_and(m_util.mk_is_zero(arg1), m_util.mk_is_zero(arg2)),
m().mk_or(m().mk_and(m_util.mk_is_positive(arg1), m_util.mk_is_negative(arg2)),
m().mk_and(m_util.mk_is_negative(arg1), m_util.mk_is_positive(arg2))));
v = m().mk_app(get_fid(), OP_FPA_MIN_UNSPECIFIED, arg1, arg2);
result = m().mk_ite(c, v, m().mk_app(get_fid(), OP_FPA_MIN_I, arg1, arg2));
return BR_REWRITE_FULL;
}
}
br_status fpa_rewriter::mk_min_i(func_decl * f, expr * arg1, expr * arg2, expr_ref & result) {
scoped_mpf v1(m_fm), v2(m_fm);
if (m_util.is_numeral(arg1, v1) && m_util.is_numeral(arg2, v2)) {
if (m_fm.is_zero(v1) && m_fm.is_zero(v2) && m_fm.sgn(v1) != m_fm.sgn(v2))
result = m().mk_app(get_fid(), OP_FPA_MIN_UNSPECIFIED, arg1, arg2);
else
result = m_util.mk_min(arg1, arg2);
return BR_FAILED;
scoped_mpf r(m_fm);
m_fm.minimum(v1, v2, r);
result = m_util.mk_value(r);
return BR_DONE;
}
@ -434,38 +403,13 @@ br_status fpa_rewriter::mk_max(expr * arg1, expr * arg2, expr_ref & result) {
}
scoped_mpf v1(m_fm), v2(m_fm);
if (m_util.is_numeral(arg1, v1) && m_util.is_numeral(arg2, v2)) {
if (m_fm.is_zero(v1) && m_fm.is_zero(v2) && m_fm.sgn(v1) != m_fm.sgn(v2)) {
result = m().mk_app(get_fid(), OP_FPA_MAX_UNSPECIFIED, arg1, arg2);
return BR_REWRITE1;
}
else {
scoped_mpf r(m_fm);
m_fm.maximum(v1, v2, r);
result = m_util.mk_value(r);
return BR_DONE;
}
}
else {
expr_ref c(m()), v(m());
c = m().mk_and(m().mk_and(m_util.mk_is_zero(arg1), m_util.mk_is_zero(arg2)),
m().mk_or(m().mk_and(m_util.mk_is_positive(arg1), m_util.mk_is_negative(arg2)),
m().mk_and(m_util.mk_is_negative(arg1), m_util.mk_is_positive(arg2))));
v = m().mk_app(get_fid(), OP_FPA_MAX_UNSPECIFIED, arg1, arg2);
result = m().mk_ite(c, v, m().mk_app(get_fid(), OP_FPA_MAX_I, arg1, arg2));
return BR_REWRITE_FULL;
}
}
br_status fpa_rewriter::mk_max_i(func_decl * f, expr * arg1, expr * arg2, expr_ref & result) {
scoped_mpf v1(m_fm), v2(m_fm);
if (m_util.is_numeral(arg1, v1) && m_util.is_numeral(arg2, v2)) {
if (m_fm.is_zero(v1) && m_fm.is_zero(v2) && m_fm.sgn(v1) != m_fm.sgn(v2))
result = m().mk_app(get_fid(), OP_FPA_MIN_UNSPECIFIED, arg1, arg2);
else
result = m_util.mk_max(arg1, arg2);
return BR_FAILED;
scoped_mpf r(m_fm);
m_fm.maximum(v1, v2, r);
result = m_util.mk_value(r);
return BR_DONE;
}