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

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    24  */

    26 #ifndef CPU_MIPS_VM_C1_LINEARSCAN_MIPS_HPP

    27 #define CPU_MIPS_VM_C1_LINEARSCAN_MIPS_HPP

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

    30   return reg_num < 26 || reg_num > 30;

    31 }

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

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

    35     return 2;

    36   }

    37   return 1;

    38 }

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

    42   return type == T_FLOAT || type == T_DOUBLE;

    43 }

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

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

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

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

    49   return true;

    50 }

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

    54 }

    57 // Implementation of LinearScanWalker

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

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

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

    62     _first_reg = pd_first_callee_saved_reg;

    63     _last_reg = pd_last_callee_saved_reg;

    64     return true;

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

    66 #ifdef _LP64

    67     _first_reg = 12;  /* From T0 */

    68 #else

    69     _first_reg = 8;    /* From T0 */

    70 #endif

    71     _last_reg = pd_last_allocatable_cpu_reg;

    72     return true;

    73   }

    74   return false;

    75 }

    77 #endif // CPU_MIPS_VM_C1_LINEARSCAN_MIPS_HPP

src/cpu/mips/vm/c1_LinearScan_mips.hpp@ffcdff41a92f