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

     1 /*

     2  * Copyright 2005-2006 Sun Microsystems, Inc.  All Rights Reserved.

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

     4  *

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

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

     7  * published by the Free Software Foundation.

     8  *

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

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

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

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

    13  * accompanied this code).

    14  *

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

    16  * 2 along with this work; if not, write to the Free Software Foundation,

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

    18  *

    19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

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

    26   return reg_num < 26 || reg_num > 31;

    27 }

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

    30   // Sparc requires two cpu registers for long

    31   // and two cpu registers for double

    32 #ifdef _LP64

    33   if (type == T_DOUBLE) {

    34 #else

    35   if (type == T_DOUBLE || type == T_LONG) {

    36 #endif

    37     return 2;

    38   }

    39   return 1;

    40 }

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

    44 #ifdef _LP64

    45   return type == T_DOUBLE;

    46 #else

    47   return type == T_DOUBLE || type == T_LONG;

    48 #endif

    49 }

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

    52   return assigned_reg > pd_last_callee_saved_reg && assigned_reg <= pd_last_fpu_reg;

    53 }

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

    57   // No special case behaviours yet

    58 }

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

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

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

    64     _first_reg = pd_first_callee_saved_reg;

    65     _last_reg = pd_last_callee_saved_reg;

    66     return true;

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

    68     _first_reg = pd_first_cpu_reg;

    69     _last_reg = pd_last_allocatable_cpu_reg;

    70     return true;

    71   }

    72   return false;

    73 }

src/cpu/sparc/vm/c1_LinearScan_sparc.hpp@9c2ecc2ffb12