c1_LinearScan_sparc.hpp revision 1472:c18cbe5936b8 
1/*
2 * Copyright (c) 2005, 2006, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
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23 */
24
25inline bool LinearScan::is_processed_reg_num(int reg_num) {
26  return reg_num < 26 || reg_num > 31;
27}
28
29inline 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}
41
42
43inline 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}
50
51inline bool LinearScan::is_caller_save(int assigned_reg) {
52  return assigned_reg > pd_last_callee_saved_reg && assigned_reg <= pd_last_fpu_reg;
53}
54
55
56inline void LinearScan::pd_add_temps(LIR_Op* op) {
57  // No special case behaviours yet
58}
59
60
61inline 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}
74