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/cardTableModRefBS.hpp"
32 #include "memory/resourceArea.hpp"
33 #include "prims/methodHandles.hpp"
34 #include "runtime/biasedLocking.hpp"
35 #include "runtime/interfaceSupport.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 #if INCLUDE_ALL_GCS
42 #include "gc/g1/g1BarrierSet.hpp"
43 #include "gc/g1/g1CollectedHeap.inline.hpp"
44 #include "gc/g1/heapRegion.hpp"
45 #endif
46
47 // Convention: Use Z_R0 and Z_R1 instead of Z_scratch_* in all
48 // assembler_s390.* files.
49
50 // Convert the raw encoding form into the form expected by the
51 // constructor for Address. This is called by adlc generated code.
52 Address Address::make_raw(int base, int index, int scale, int disp, relocInfo::relocType disp_reloc) {
53 assert(scale == 0, "Scale should not be used on z/Architecture. The call to make_raw is "
54 "generated by adlc and this must mirror all features of Operands from machnode.hpp.");
55 assert(disp_reloc == relocInfo::none, "not implemented on z/Architecture.");
56
57 Address madr(as_Register(base), as_Register(index), in_ByteSize(disp));
58 return madr;
59 }
60
61 int AbstractAssembler::code_fill_byte() {
62 return 0x00; // Illegal instruction 0x00000000.
63 }
64
65 // Condition code masks. Details see enum branch_condition.
66 // Although this method is meant for INT CCs, the Overflow/Ordered
67 // bit in the masks has to be considered. The CC might have been set
68 // by a float operation, but is evaluated while calculating an integer
69 // result. See elementary test TestFloat.isNotEqual(FF)Z for example.
70 Assembler::branch_condition Assembler::inverse_condition(Assembler::branch_condition cc) {
71 Assembler::branch_condition unordered_bit = (Assembler::branch_condition)(cc & bcondNotOrdered);
72 Assembler::branch_condition inverse_cc;
73
74 // Some are commented out to avoid duplicate labels.
75 switch (cc) {
76 case bcondNever : inverse_cc = bcondAlways; break; // 0 -> 15
77 case bcondAlways : inverse_cc = bcondNever; break; // 15 -> 0
78
79 case bcondOverflow : inverse_cc = bcondNotOverflow; break; // 1 -> 14
80 case bcondNotOverflow : inverse_cc = bcondOverflow; break; // 14 -> 1
81
82 default :
83 switch ((Assembler::branch_condition)(cc & bcondOrdered)) {
84 case bcondEqual : inverse_cc = bcondNotEqual; break; // 8 -> 6
85 // case bcondZero :
86 // case bcondAllZero :
87
88 case bcondNotEqual : inverse_cc = bcondEqual; break; // 6 -> 8
89 // case bcondNotZero :
90 // case bcondMixed :
91
92 case bcondLow : inverse_cc = bcondNotLow; break; // 4 -> 10
93 // case bcondNegative :
94
95 case bcondNotLow : inverse_cc = bcondLow; break; // 10 -> 4
96 // case bcondNotNegative :
97
98 case bcondHigh : inverse_cc = bcondNotHigh; break; // 2 -> 12
99 // case bcondPositive :
100
101 case bcondNotHigh : inverse_cc = bcondHigh; break; // 12 -> 2
102 // case bcondNotPositive :
103
104 default :
105 fprintf(stderr, "inverse_condition(%d)\n", (int)cc);
106 fflush(stderr);
107 ShouldNotReachHere();
108 return bcondNever;
109 }
110 // If cc is even, inverse_cc must be odd.
111 if (!unordered_bit) {
112 inverse_cc = (Assembler::branch_condition)(inverse_cc | bcondNotOrdered);
113 }
114 break;
115 }
116 return inverse_cc;
117 }
118
119 Assembler::branch_condition Assembler::inverse_float_condition(Assembler::branch_condition cc) {
120 Assembler::branch_condition inverse_cc;
121
122 switch (cc) {
123 case bcondNever : inverse_cc = bcondAlways; break; // 0
124 case bcondAlways : inverse_cc = bcondNever; break; // 15
125
126 case bcondNotOrdered : inverse_cc = bcondOrdered; break; // 14
127 case bcondOrdered : inverse_cc = bcondNotOrdered; break; // 1
128
129 case bcondEqual : inverse_cc = (branch_condition)(bcondNotEqual + bcondNotOrdered); break; // 8
130 case bcondNotEqual + bcondNotOrdered : inverse_cc = bcondEqual; break; // 7
131
132 case bcondLow + bcondNotOrdered : inverse_cc = (branch_condition)(bcondHigh + bcondEqual); break; // 5
133 case bcondNotLow : inverse_cc = (branch_condition)(bcondLow + bcondNotOrdered); break; // 10
134
135 case bcondHigh : inverse_cc = (branch_condition)(bcondLow + bcondNotOrdered + bcondEqual); break; // 2
136 case bcondNotHigh + bcondNotOrdered : inverse_cc = bcondHigh; break; // 13
137
138 default :
139 fprintf(stderr, "inverse_float_condition(%d)\n", (int)cc);
140 fflush(stderr);
141 ShouldNotReachHere();
142 return bcondNever;
143 }
144 return inverse_cc;
145 }
146
147 #ifdef ASSERT
148 void Assembler::print_dbg_msg(outputStream* out, unsigned long inst, const char* msg, int ilen) {
149 out->flush();
150 switch (ilen) {
151 case 2: out->print_cr("inst = %4.4x, %s", (unsigned short)inst, msg); break;
152 case 4: out->print_cr("inst = %8.8x, %s\n", (unsigned int)inst, msg); break;
153 case 6: out->print_cr("inst = %12.12lx, %s\n", inst, msg); break;
154 default: out->print_cr("inst = %16.16lx, %s\n", inst, msg); break;
155 }
156 out->flush();
157 }
158
159 void Assembler::dump_code_range(outputStream* out, address pc, const unsigned int range, const char* msg) {
160 out->cr();
161 out->print_cr("-------------------------------");
162 out->print_cr("-- %s", msg);
163 out->print_cr("-------------------------------");
164 out->print_cr("Hex dump of +/-%d bytes around %p, interval [%p,%p)", range, pc, pc-range, pc+range);
165 os::print_hex_dump(out, pc-range, pc+range, 2);
166
167 out->cr();
168 out->print_cr("Disassembly of +/-%d bytes around %p, interval [%p,%p)", range, pc, pc-range, pc+range);
169 Disassembler::decode(pc, pc + range, out);
170 }
171 #endif