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 21 * 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 || cur->type() == T_ADDRESS) { 68 _first_reg = pd_first_cpu_reg; 69 _last_reg = pd_last_allocatable_cpu_reg; 70 return true; 71 } 72 return false; 73 }