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1 /*
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2 * Copyright 2005-2006 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 inline bool LinearScan::is_processed_reg_num(int reg_num) {
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26 return reg_num < 26 || reg_num > 31;
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27 }
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28
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29 inline int LinearScan::num_physical_regs(BasicType type) {
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30 // Sparc requires two cpu registers for long
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31 // and two cpu registers for double
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32 #ifdef _LP64
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33 if (type == T_DOUBLE) {
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34 #else
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35 if (type == T_DOUBLE || type == T_LONG) {
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36 #endif
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37 return 2;
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38 }
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39 return 1;
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40 }
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41
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42
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43 inline bool LinearScan::requires_adjacent_regs(BasicType type) {
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44 #ifdef _LP64
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45 return type == T_DOUBLE;
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46 #else
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47 return type == T_DOUBLE || type == T_LONG;
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48 #endif
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49 }
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50
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51 inline bool LinearScan::is_caller_save(int assigned_reg) {
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52 return assigned_reg > pd_last_callee_saved_reg && assigned_reg <= pd_last_fpu_reg;
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53 }
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54
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55
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56 inline void LinearScan::pd_add_temps(LIR_Op* op) {
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57 // No special case behaviours yet
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58 }
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59
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60
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61 inline bool LinearScanWalker::pd_init_regs_for_alloc(Interval* cur) {
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62 if (allocator()->gen()->is_vreg_flag_set(cur->reg_num(), LIRGenerator::callee_saved)) {
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63 assert(cur->type() != T_FLOAT && cur->type() != T_DOUBLE, "cpu regs only");
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64 _first_reg = pd_first_callee_saved_reg;
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65 _last_reg = pd_last_callee_saved_reg;
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66 return true;
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67 } else if (cur->type() == T_INT || cur->type() == T_LONG || cur->type() == T_OBJECT) {
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68 _first_reg = pd_first_cpu_reg;
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69 _last_reg = pd_last_allocatable_cpu_reg;
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70 return true;
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71 }
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72 return false;
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73 }
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