jdk8-mips64-public/hotspot: src/cpu/mips/vm/c1_LinearScan

     1 /*

     2  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.

     3  * Copyright (c) 2015, 2016, Loongson Technology. All rights reserved.

     4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     5  *

     6  * This code is free software; you can redistribute it and/or modify it

     7  * under the terms of the GNU General Public License version 2 only, as

     8  * published by the Free Software Foundation.

     9  *

    10  * This code is distributed in the hope that it will be useful, but WITHOUT

    11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    13  * version 2 for more details (a copy is included in the LICENSE file that

    14  * accompanied this code).

    15  *

    16  * You should have received a copy of the GNU General Public License version

    17  * 2 along with this work; if not, write to the Free Software Foundation,

    18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    19  *

    20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    21  * or visit www.oracle.com if you need additional information or have any

    22  * questions.

    23  *

    24  */

    26 inline bool LinearScan::is_processed_reg_num(int reg_num) {

    27 	return reg_num < 26 || reg_num > 30;

    28 }

    30 inline int LinearScan::num_physical_regs(BasicType type) {

    31 	if (type == T_LONG || type== T_DOUBLE || type == T_FLOAT) {

    32 		return 2;

    33 	}

    34 	return 1;

    35 }

    38 inline bool LinearScan::requires_adjacent_regs(BasicType type) {

    39 	return type == T_FLOAT || type == T_DOUBLE;

    40 }

    42 inline bool LinearScan::is_caller_save(int assigned_reg) {

    43 	assert(assigned_reg >= 0 && assigned_reg < nof_regs, "should call this only for registers");

    44 	// return true; // no callee-saved registers on Intel

    45 	//FIXME, here, MIPS indeed got callee-saved registers

    46 	return true;

    47 }

    50 inline void LinearScan::pd_add_temps(LIR_Op* op) {

    51 }

    54 // Implementation of LinearScanWalker

    56 inline bool LinearScanWalker::pd_init_regs_for_alloc(Interval* cur) {

    57 	if (allocator()->gen()->is_vreg_flag_set(cur->reg_num(), LIRGenerator::callee_saved)) {

    58 		assert(cur->type() != T_FLOAT && cur->type() != T_DOUBLE, "cpu regs only");

    59 		_first_reg = pd_first_callee_saved_reg;

    60 //		_first_reg = 8;

    61 		_last_reg = pd_last_callee_saved_reg;

    62 		return true;

    63 	} else if (cur->type() == T_INT || cur->type() == T_LONG || cur->type() == T_OBJECT) {

    64 //		_first_reg = pd_first_cpu_reg;

    65 #ifdef _LP64

    66 		_first_reg = 12;	/* From T0 */

    67 #else

    68 		_first_reg = 8;		/* From T0 */

    69 #endif

    70 		_last_reg = pd_last_allocatable_cpu_reg;

    71 		return true;

    72 	}

    73 	return false;

    74 }

src/cpu/mips/vm/c1_LinearScan_mips.hpp@d885f8d65c58