1 /* 2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2016 SAP SE. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #ifndef CPU_S390_VM_C1_LINEARSCAN_S390_HPP 27 #define CPU_S390_VM_C1_LINEARSCAN_S390_HPP 28 29 inline bool LinearScan::is_processed_reg_num(int reg_num) { 30 // unallocated: Z_thread, Z_fp, Z_SP, Z_R0_scratch, Z_R1_scratch, Z_R14 31 assert(FrameMap::Z_R14_opr->cpu_regnr() == 10, "wrong assumption below"); 32 assert(FrameMap::Z_R0_opr->cpu_regnr() == 11, "wrong assumption below"); 33 assert(FrameMap::Z_R1_opr->cpu_regnr() == 12, "wrong assumption below"); 34 assert(FrameMap::Z_R8_opr->cpu_regnr() == 13, "wrong assumption below"); 35 assert(FrameMap::Z_R9_opr->cpu_regnr() == 14, "wrong assumption below"); 36 assert(FrameMap::Z_R15_opr->cpu_regnr() == 15, "wrong assumption below"); 37 assert(reg_num >= 0, "invalid reg_num"); 38 return reg_num <= FrameMap::last_cpu_reg() || reg_num >= pd_nof_cpu_regs_frame_map; 39 } 40 41 inline int LinearScan::num_physical_regs(BasicType type) { 42 // IBM Z requires one cpu registers for long, 43 // and one fpu register for double. 44 return 1; 45 } 46 47 inline bool LinearScan::requires_adjacent_regs(BasicType type) { 48 return false; 49 } 50 51 inline bool LinearScan::is_caller_save(int assigned_reg) { 52 assert(assigned_reg >= 0 && assigned_reg < nof_regs, "should call this only for registers"); 53 return true; // No callee-saved registers on IBM Z. 54 } 55 56 inline void LinearScan::pd_add_temps(LIR_Op* op) { 57 // No special case behaviours. 58 } 59 60 inline bool LinearScanWalker::pd_init_regs_for_alloc(Interval* cur) { 61 return false; // No special case behaviours. 62 } 63 64 #endif // CPU_S390_VM_C1_LINEARSCAN_S390_HPP