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comparison src/share/vm/adlc/output_h.cpp @ 3851:95134e034042

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7063629: use cbcond in C2 generated code on T4 Summary: Use new short branch instruction in C2 generated code. Reviewed-by: never
author kvn
date Thu, 11 Aug 2011 12:08:11 -0700
parents c7b60b601eb4
children 11211f7cb5a0
comparison
equal deleted inserted replaced
3850:6987871cfb9b 3851:95134e034042
1534 // virtual functions for attributes 1534 // virtual functions for attributes
1535 // 1535 //
1536 // Each instruction attribute results in a virtual call of same name. 1536 // Each instruction attribute results in a virtual call of same name.
1537 // The ins_cost is not handled here. 1537 // The ins_cost is not handled here.
1538 Attribute *attr = instr->_attribs; 1538 Attribute *attr = instr->_attribs;
1539 bool avoid_back_to_back = false;
1539 while (attr != NULL) { 1540 while (attr != NULL) {
1540 if (strcmp(attr->_ident,"ins_cost") && 1541 if (strcmp(attr->_ident,"ins_cost") &&
1541 strcmp(attr->_ident,"ins_short_branch")) { 1542 strcmp(attr->_ident,"ins_short_branch")) {
1542 fprintf(fp," int %s() const { return %s; }\n", 1543 fprintf(fp," int %s() const { return %s; }\n",
1543 attr->_ident, attr->_val); 1544 attr->_ident, attr->_val);
1544 } 1545 }
1546 // Check value for ins_avoid_back_to_back, and if it is true (1), set the flag
1547 if (!strcmp(attr->_ident,"ins_avoid_back_to_back") && attr->int_val(*this) != 0)
1548 avoid_back_to_back = true;
1545 attr = (Attribute *)attr->_next; 1549 attr = (Attribute *)attr->_next;
1546 } 1550 }
1547 1551
1548 // virtual functions for encode and format 1552 // virtual functions for encode and format
1549 1553
1698 if ( instr->has_short_branch_form() ) { 1702 if ( instr->has_short_branch_form() ) {
1699 if ( node_flags_set ) { 1703 if ( node_flags_set ) {
1700 fprintf(fp," | Flag_may_be_short_branch"); 1704 fprintf(fp," | Flag_may_be_short_branch");
1701 } else { 1705 } else {
1702 fprintf(fp,"init_flags(Flag_may_be_short_branch"); 1706 fprintf(fp,"init_flags(Flag_may_be_short_branch");
1707 node_flags_set = true;
1708 }
1709 }
1710
1711 // flag: if this instruction should not be generated back to back.
1712 if ( avoid_back_to_back ) {
1713 if ( node_flags_set ) {
1714 fprintf(fp," | Flag_avoid_back_to_back");
1715 } else {
1716 fprintf(fp,"init_flags(Flag_avoid_back_to_back");
1703 node_flags_set = true; 1717 node_flags_set = true;
1704 } 1718 }
1705 } 1719 }
1706 1720
1707 // Check if machine instructions that USE memory, but do not DEF memory, 1721 // Check if machine instructions that USE memory, but do not DEF memory,