aoqi@1: /*
aoqi@1:  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
aoqi@1:  * Copyright (c) 2015, 2016, Loongson Technology. All rights reserved.
aoqi@1:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@1:  *
aoqi@1:  * This code is free software; you can redistribute it and/or modify it
aoqi@1:  * under the terms of the GNU General Public License version 2 only, as
aoqi@1:  * published by the Free Software Foundation.
aoqi@1:  *
aoqi@1:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@1:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@1:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@1:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@1:  * accompanied this code).
aoqi@1:  *
aoqi@1:  * You should have received a copy of the GNU General Public License version
aoqi@1:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@1:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@1:  *
aoqi@1:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@1:  * or visit www.oracle.com if you need additional information or have any
aoqi@1:  * questions.
aoqi@1:  *
aoqi@1:  */
aoqi@1: 
aoqi@1: inline bool LinearScan::is_processed_reg_num(int reg_num) {
aoqi@1: 	return reg_num < 26 || reg_num > 30;
aoqi@1: }
aoqi@1: 
aoqi@1: inline int LinearScan::num_physical_regs(BasicType type) {
aoqi@1: 	if (type == T_LONG || type== T_DOUBLE || type == T_FLOAT) {
aoqi@1: 		return 2;
aoqi@1: 	}
aoqi@1: 	return 1;
aoqi@1: }
aoqi@1: 
aoqi@1: 
aoqi@1: inline bool LinearScan::requires_adjacent_regs(BasicType type) {
aoqi@1: 	return type == T_FLOAT || type == T_DOUBLE;
aoqi@1: }
aoqi@1: 
aoqi@1: inline bool LinearScan::is_caller_save(int assigned_reg) {
aoqi@1: 	assert(assigned_reg >= 0 && assigned_reg < nof_regs, "should call this only for registers");
aoqi@1: 	// return true; // no callee-saved registers on Intel
aoqi@1: 	//FIXME, here, MIPS indeed got callee-saved registers
aoqi@1: 	return true;
aoqi@1: }
aoqi@1: 
aoqi@1: 
aoqi@1: inline void LinearScan::pd_add_temps(LIR_Op* op) {
aoqi@1: }
aoqi@1: 
aoqi@1: 
aoqi@1: // Implementation of LinearScanWalker
aoqi@1: 
aoqi@1: inline bool LinearScanWalker::pd_init_regs_for_alloc(Interval* cur) {
aoqi@1: 	if (allocator()->gen()->is_vreg_flag_set(cur->reg_num(), LIRGenerator::callee_saved)) {
aoqi@1: 		assert(cur->type() != T_FLOAT && cur->type() != T_DOUBLE, "cpu regs only");
aoqi@1: 		_first_reg = pd_first_callee_saved_reg;
aoqi@1: //		_first_reg = 8;
aoqi@1: 		_last_reg = pd_last_callee_saved_reg;
aoqi@1: 		return true;
aoqi@1: 	} else if (cur->type() == T_INT || cur->type() == T_LONG || cur->type() == T_OBJECT) {
aoqi@1: //		_first_reg = pd_first_cpu_reg;
aoqi@1: #ifdef _LP64
aoqi@1: 		_first_reg = 12;	/* From T0 */
aoqi@1: #else
aoqi@1: 		_first_reg = 8;		/* From T0 */
aoqi@1: #endif
aoqi@1: 		_last_reg = pd_last_allocatable_cpu_reg;
aoqi@1: 		return true;
aoqi@1: 	}
aoqi@1: 	return false;
aoqi@1: }