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comparison src/share/vm/opto/superword.cpp @ 6823:859c45fb8cea

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7201026: add vector for shift count Summary: Add generation of vectors for scalar shift count. Reviewed-by: roland, twisti, dlong
author kvn
date Tue, 02 Oct 2012 12:25:13 -0700
parents e626685e9f6c
children f6badecb7ea7
comparison
equal deleted inserted replaced
6822:f6b0eb4e44cf 6823:859c45fb8cea
1434 if (opd->is_Vector() || opd->is_LoadVector()) { 1434 if (opd->is_Vector() || opd->is_LoadVector()) {
1435 assert(((opd_idx != 2) || !VectorNode::is_shift(p0)), "shift's count can't be vector"); 1435 assert(((opd_idx != 2) || !VectorNode::is_shift(p0)), "shift's count can't be vector");
1436 return opd; // input is matching vector 1436 return opd; // input is matching vector
1437 } 1437 }
1438 if ((opd_idx == 2) && VectorNode::is_shift(p0)) { 1438 if ((opd_idx == 2) && VectorNode::is_shift(p0)) {
1439 // No vector is needed for shift count.
1440 // Vector instructions do not mask shift count, do it here.
1441 Compile* C = _phase->C; 1439 Compile* C = _phase->C;
1442 Node* cnt = opd; 1440 Node* cnt = opd;
1441 // Vector instructions do not mask shift count, do it here.
1443 juint mask = (p0->bottom_type() == TypeInt::INT) ? (BitsPerInt - 1) : (BitsPerLong - 1); 1442 juint mask = (p0->bottom_type() == TypeInt::INT) ? (BitsPerInt - 1) : (BitsPerLong - 1);
1444 const TypeInt* t = opd->find_int_type(); 1443 const TypeInt* t = opd->find_int_type();
1445 if (t != NULL && t->is_con()) { 1444 if (t != NULL && t->is_con()) {
1446 juint shift = t->get_con(); 1445 juint shift = t->get_con();
1447 if (shift > mask) { // Unsigned cmp 1446 if (shift > mask) { // Unsigned cmp
1454 cnt = new (C) AndINode(opd, cnt); 1453 cnt = new (C) AndINode(opd, cnt);
1455 _igvn.register_new_node_with_optimizer(cnt); 1454 _igvn.register_new_node_with_optimizer(cnt);
1456 _phase->set_ctrl(cnt, _phase->get_ctrl(opd)); 1455 _phase->set_ctrl(cnt, _phase->get_ctrl(opd));
1457 } 1456 }
1458 assert(opd->bottom_type()->isa_int(), "int type only"); 1457 assert(opd->bottom_type()->isa_int(), "int type only");
1459 // Move non constant shift count into XMM register. 1458 // Move non constant shift count into vector register.
1460 cnt = new (C) MoveI2FNode(cnt); 1459 cnt = VectorNode::shift_count(C, p0, cnt, vlen, velt_basic_type(p0));
1461 } 1460 }
1462 if (cnt != opd) { 1461 if (cnt != opd) {
1463 _igvn.register_new_node_with_optimizer(cnt); 1462 _igvn.register_new_node_with_optimizer(cnt);
1464 _phase->set_ctrl(cnt, _phase->get_ctrl(opd)); 1463 _phase->set_ctrl(cnt, _phase->get_ctrl(opd));
1465 } 1464 }