1 /* 2 * Copyright (c) 2016, 2018, 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 #include "precompiled.hpp" 27 #include "asm/assembler.inline.hpp" 28 #include "compiler/disassembler.hpp" 29 #include "gc/shared/collectedHeap.inline.hpp" 30 #include "interpreter/interpreter.hpp" 31 #include "gc/shared/cardTableBarrierSet.hpp" 32 #include "memory/resourceArea.hpp" 33 #include "prims/methodHandles.hpp" 34 #include "runtime/biasedLocking.hpp" 35 #include "runtime/interfaceSupport.inline.hpp" 36 #include "runtime/objectMonitor.hpp" 37 #include "runtime/os.hpp" 38 #include "runtime/sharedRuntime.hpp" 39 #include "runtime/stubRoutines.hpp" 40 #include "utilities/macros.hpp" 41 42 // Convention: Use Z_R0 and Z_R1 instead of Z_scratch_* in all 43 // assembler_s390.* files. 44 45 // Convert the raw encoding form into the form expected by the 46 // constructor for Address. This is called by adlc generated code. 47 Address Address::make_raw(int base, int index, int scale, int disp, relocInfo::relocType disp_reloc) { 48 assert(scale == 0, "Scale should not be used on z/Architecture. The call to make_raw is " 49 "generated by adlc and this must mirror all features of Operands from machnode.hpp."); 50 assert(disp_reloc == relocInfo::none, "not implemented on z/Architecture."); 51 52 Address madr(as_Register(base), as_Register(index), in_ByteSize(disp)); 53 return madr; 54 } 55 56 int AbstractAssembler::code_fill_byte() { 57 return 0x00; // Illegal instruction 0x00000000. 58 } 59 60 // Condition code masks. Details see enum branch_condition. 61 // Although this method is meant for INT CCs, the Overflow/Ordered 62 // bit in the masks has to be considered. The CC might have been set 63 // by a float operation, but is evaluated while calculating an integer 64 // result. See elementary test TestFloat.isNotEqual(FF)Z for example. 65 Assembler::branch_condition Assembler::inverse_condition(Assembler::branch_condition cc) { 66 Assembler::branch_condition unordered_bit = (Assembler::branch_condition)(cc & bcondNotOrdered); 67 Assembler::branch_condition inverse_cc; 68 69 // Some are commented out to avoid duplicate labels. 70 switch (cc) { 71 case bcondNever : inverse_cc = bcondAlways; break; // 0 -> 15 72 case bcondAlways : inverse_cc = bcondNever; break; // 15 -> 0 73 74 case bcondOverflow : inverse_cc = bcondNotOverflow; break; // 1 -> 14 75 case bcondNotOverflow : inverse_cc = bcondOverflow; break; // 14 -> 1 76 77 default : 78 switch ((Assembler::branch_condition)(cc & bcondOrdered)) { 79 case bcondEqual : inverse_cc = bcondNotEqual; break; // 8 -> 6 80 // case bcondZero : 81 // case bcondAllZero : 82 83 case bcondNotEqual : inverse_cc = bcondEqual; break; // 6 -> 8 84 // case bcondNotZero : 85 // case bcondMixed : 86 87 case bcondLow : inverse_cc = bcondNotLow; break; // 4 -> 10 88 // case bcondNegative : 89 90 case bcondNotLow : inverse_cc = bcondLow; break; // 10 -> 4 91 // case bcondNotNegative : 92 93 case bcondHigh : inverse_cc = bcondNotHigh; break; // 2 -> 12 94 // case bcondPositive : 95 96 case bcondNotHigh : inverse_cc = bcondHigh; break; // 12 -> 2 97 // case bcondNotPositive : 98 99 default : 100 fprintf(stderr, "inverse_condition(%d)\n", (int)cc); 101 fflush(stderr); 102 ShouldNotReachHere(); 103 return bcondNever; 104 } 105 // If cc is even, inverse_cc must be odd. 106 if (!unordered_bit) { 107 inverse_cc = (Assembler::branch_condition)(inverse_cc | bcondNotOrdered); 108 } 109 break; 110 } 111 return inverse_cc; 112 } 113 114 Assembler::branch_condition Assembler::inverse_float_condition(Assembler::branch_condition cc) { 115 Assembler::branch_condition inverse_cc; 116 117 switch (cc) { 118 case bcondNever : inverse_cc = bcondAlways; break; // 0 119 case bcondAlways : inverse_cc = bcondNever; break; // 15 120 121 case bcondNotOrdered : inverse_cc = bcondOrdered; break; // 14 122 case bcondOrdered : inverse_cc = bcondNotOrdered; break; // 1 123 124 case bcondEqual : inverse_cc = (branch_condition)(bcondNotEqual + bcondNotOrdered); break; // 8 125 case bcondNotEqual + bcondNotOrdered : inverse_cc = bcondEqual; break; // 7 126 127 case bcondLow + bcondNotOrdered : inverse_cc = (branch_condition)(bcondHigh + bcondEqual); break; // 5 128 case bcondNotLow : inverse_cc = (branch_condition)(bcondLow + bcondNotOrdered); break; // 10 129 130 case bcondHigh : inverse_cc = (branch_condition)(bcondLow + bcondNotOrdered + bcondEqual); break; // 2 131 case bcondNotHigh + bcondNotOrdered : inverse_cc = bcondHigh; break; // 13 132 133 default : 134 fprintf(stderr, "inverse_float_condition(%d)\n", (int)cc); 135 fflush(stderr); 136 ShouldNotReachHere(); 137 return bcondNever; 138 } 139 return inverse_cc; 140 } 141 142 #ifdef ASSERT 143 void Assembler::print_dbg_msg(outputStream* out, unsigned long inst, const char* msg, int ilen) { 144 out->flush(); 145 switch (ilen) { 146 case 2: out->print_cr("inst = %4.4x, %s", (unsigned short)inst, msg); break; 147 case 4: out->print_cr("inst = %8.8x, %s\n", (unsigned int)inst, msg); break; 148 case 6: out->print_cr("inst = %12.12lx, %s\n", inst, msg); break; 149 default: out->print_cr("inst = %16.16lx, %s\n", inst, msg); break; 150 } 151 out->flush(); 152 } 153 154 void Assembler::dump_code_range(outputStream* out, address pc, const unsigned int range, const char* msg) { 155 out->cr(); 156 out->print_cr("-------------------------------"); 157 out->print_cr("-- %s", msg); 158 out->print_cr("-------------------------------"); 159 out->print_cr("Hex dump of +/-%d bytes around %p, interval [%p,%p)", range, pc, pc-range, pc+range); 160 os::print_hex_dump(out, pc-range, pc+range, 2); 161 162 out->cr(); 163 out->print_cr("Disassembly of +/-%d bytes around %p, interval [%p,%p)", range, pc, pc-range, pc+range); 164 Disassembler::decode(pc, pc + range, out); 165 } 166 #endif