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comparison src/cpu/sparc/vm/c1_LinearScan_sparc.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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-1:000000000000 0:a61af66fc99e
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 */
24
25 inline bool LinearScan::is_processed_reg_num(int reg_num) {
26 return reg_num < 26 || reg_num > 31;
27 }
28
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 }
41
42
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 }
50
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 }
54
55
56 inline void LinearScan::pd_add_temps(LIR_Op* op) {
57 // No special case behaviours yet
58 }
59
60
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 }