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alumacc: merge independent of sign

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This commit is contained in:
Adrian Parvin Ouano 2023-10-08 00:09:27 +08:00
parent 74d38db3b5
commit 535ecf84ac
1 changed files with 39 additions and 21 deletions
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60
passes/techmap/alumacc.cc
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@ -40,34 +40,51 @@ struct AlumaccWorker
{
std::vector<RTLIL::Cell*> cells;
RTLIL::SigSpec a, b, c, y;
std::vector<tuple<bool, bool, bool, bool, RTLIL::SigSpec>> cmp;
std::vector<tuple<bool, bool, bool, bool, bool, RTLIL::SigSpec>> cmp;
bool is_signed, invert_b;
RTLIL::Cell *alu_cell;
RTLIL::SigSpec cached_lt, cached_gt, cached_eq, cached_ne;
RTLIL::SigSpec cached_lt, cached_slt, cached_gt, cached_sgt, cached_eq, cached_ne;
RTLIL::SigSpec cached_cf, cached_of, cached_sf;
RTLIL::SigSpec get_lt() {
if (GetSize(cached_lt) == 0) {
if (is_signed) {
RTLIL::SigSpec get_lt(bool is_signed) {
if (is_signed) {
if (GetSize(cached_slt) == 0) {
get_of();
get_sf();
cached_lt = alu_cell->module->Xor(NEW_ID, cached_of, cached_sf);
cached_slt = alu_cell->module->Xor(NEW_ID, cached_of, cached_sf);
}
else
return cached_slt;
} else {
if (GetSize(cached_lt) == 0) {
cached_lt = get_cf();
}
return cached_lt;
}
return cached_lt;
}
RTLIL::SigSpec get_gt() {
if (GetSize(cached_gt) == 0) {
get_lt();
get_eq();
SigSpec Or = alu_cell->module->Or(NEW_ID, cached_lt, cached_eq);
cached_gt = alu_cell->module->Not(NEW_ID, Or, false, alu_cell->get_src_attribute());
RTLIL::SigSpec get_gt(bool is_signed) {
if (is_signed) {
if (GetSize(cached_sgt) == 0) {
get_lt(is_signed);
get_eq();
SigSpec Or = alu_cell->module->Or(NEW_ID, cached_slt, cached_eq);
cached_sgt = alu_cell->module->Not(NEW_ID, Or, false, alu_cell->get_src_attribute());
}
return cached_sgt;
} else {
if (GetSize(cached_gt) == 0) {
get_lt(is_signed);
get_eq();
SigSpec Or = alu_cell->module->Or(NEW_ID, cached_lt, cached_eq);
cached_gt = alu_cell->module->Not(NEW_ID, Or, false, alu_cell->get_src_attribute());
}
return cached_gt;
}
return cached_gt;
}
RTLIL::SigSpec get_eq() {
@ -413,7 +430,7 @@ struct AlumaccWorker
alunode_t *n = nullptr;
for (auto node : sig_alu[RTLIL::SigSig(A, B)])
if (node->is_signed == is_signed && node->invert_b && node->c == State::S1) {
if (node->invert_b && node->c == State::S1) {
n = node;
break;
}
@ -433,7 +450,7 @@ struct AlumaccWorker
}
n->cells.push_back(cell);
n->cmp.push_back(std::make_tuple(cmp_less, !cmp_less, cmp_equal, false, Y));
n->cmp.push_back(std::make_tuple(cmp_less, !cmp_less, cmp_equal, false, is_signed, Y));
}
for (auto cell : eq_cells)
@ -459,7 +476,7 @@ struct AlumaccWorker
if (n != nullptr) {
log(" creating $alu model for %s (%s): merged with %s.\n", log_id(cell), log_id(cell->type), log_id(n->cells.front()));
n->cells.push_back(cell);
n->cmp.push_back(std::make_tuple(false, false, cmp_equal, !cmp_equal, Y));
n->cmp.push_back(std::make_tuple(false, false, cmp_equal, !cmp_equal, false, Y));
}
}
}
@ -508,11 +525,12 @@ struct AlumaccWorker
bool cmp_gt = std::get<1>(it);
bool cmp_eq = std::get<2>(it);
bool cmp_ne = std::get<3>(it);
RTLIL::SigSpec cmp_y = std::get<4>(it);
bool is_signed = std::get<4>(it);
RTLIL::SigSpec cmp_y = std::get<5>(it);
RTLIL::SigSpec sig;
if (cmp_lt) sig.append(n->get_lt());
if (cmp_gt) sig.append(n->get_gt());
if (cmp_lt) sig.append(n->get_lt(is_signed));
if (cmp_gt) sig.append(n->get_gt(is_signed));
if (cmp_eq) sig.append(n->get_eq());
if (cmp_ne) sig.append(n->get_ne());