1 /*
2 * Copyright (c) 2013, 2018, 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 package org.graalvm.compiler.lir.aarch64;
26
27 import static jdk.vm.ci.code.ValueUtil.asStackSlot;
28 import static jdk.vm.ci.code.ValueUtil.isStackSlot;
29 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.STACK;
30
31 import java.util.Arrays;
32
33 import jdk.internal.vm.compiler.collections.EconomicSet;
34 import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler;
35 import org.graalvm.compiler.lir.LIRInstructionClass;
36 import org.graalvm.compiler.lir.LIRValueUtil;
37 import org.graalvm.compiler.lir.Opcode;
38 import org.graalvm.compiler.lir.StandardOp.SaveRegistersOp;
39 import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
40 import org.graalvm.compiler.lir.framemap.FrameMap;
41
42 import jdk.vm.ci.code.Register;
43 import jdk.vm.ci.code.RegisterSaveLayout;
44 import jdk.vm.ci.code.StackSlot;
45 import jdk.vm.ci.meta.AllocatableValue;
46
47 /**
48 * Saves registers to stack slots.
49 */
50 @Opcode("SAVE_REGISTER")
51 public class AArch64SaveRegistersOp extends AArch64LIRInstruction implements SaveRegistersOp {
52 public static final LIRInstructionClass<AArch64SaveRegistersOp> TYPE = LIRInstructionClass.create(AArch64SaveRegistersOp.class);
53
54 /**
55 * The registers (potentially) saved by this operation.
56 */
57 protected final Register[] savedRegisters;
58
59 /**
60 * The slots to which the registers are saved.
61 */
62 @Def(STACK) protected final AllocatableValue[] slots;
63
64 /**
65 * Specifies if {@link #remove(EconomicSet)} should have an effect.
66 */
67 protected final boolean supportsRemove;
68
69 /**
70 *
71 * @param savedRegisters the registers saved by this operation which may be subject to
72 * {@linkplain #remove(EconomicSet) pruning}
73 * @param savedRegisterLocations the slots to which the registers are saved
74 * @param supportsRemove determines if registers can be {@linkplain #remove(EconomicSet) pruned}
75 */
76 public AArch64SaveRegistersOp(Register[] savedRegisters, AllocatableValue[] savedRegisterLocations, boolean supportsRemove) {
77 this(TYPE, savedRegisters, savedRegisterLocations, supportsRemove);
78 }
79
80 public AArch64SaveRegistersOp(LIRInstructionClass<? extends AArch64SaveRegistersOp> c, Register[] savedRegisters, AllocatableValue[] savedRegisterLocations, boolean supportsRemove) {
81 super(c);
82 assert Arrays.asList(savedRegisterLocations).stream().allMatch(LIRValueUtil::isVirtualStackSlot);
83 this.savedRegisters = savedRegisters;
84 this.slots = savedRegisterLocations;
85 this.supportsRemove = supportsRemove;
86 }
87
88 protected void saveRegister(CompilationResultBuilder crb, AArch64MacroAssembler masm, StackSlot result, Register input) {
89 AArch64Move.reg2stack(crb, masm, result, input.asValue());
90 }
91
92 @Override
93 public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) {
94 for (int i = 0; i < savedRegisters.length; i++) {
95 if (savedRegisters[i] != null) {
96 assert isStackSlot(slots[i]) : "not a StackSlot: " + slots[i];
97 saveRegister(crb, masm, asStackSlot(slots[i]), savedRegisters[i]);
98 }
99 }
100 }
101
102 public AllocatableValue[] getSlots() {
103 return slots;
104 }
105
106 @Override
107 public boolean supportsRemove() {
108 return supportsRemove;
109 }
110
111 @Override
112 public int remove(EconomicSet<Register> doNotSave) {
113 if (!supportsRemove) {
114 throw new UnsupportedOperationException();
115 }
116 return prune(doNotSave, savedRegisters);
117 }
118
119 static int prune(EconomicSet<Register> toRemove, Register[] registers) {
120 int pruned = 0;
121 for (int i = 0; i < registers.length; i++) {
122 if (registers[i] != null) {
123 if (toRemove.contains(registers[i])) {
124 registers[i] = null;
125 pruned++;
126 }
127 }
128 }
129 return pruned;
130 }
131
132 @Override
133 public RegisterSaveLayout getMap(FrameMap frameMap) {
134 int total = 0;
135 for (int i = 0; i < savedRegisters.length; i++) {
136 if (savedRegisters[i] != null) {
137 total++;
138 }
139 }
140 Register[] keys = new Register[total];
141 int[] values = new int[total];
142 if (total != 0) {
143 int mapIndex = 0;
144 for (int i = 0; i < savedRegisters.length; i++) {
145 if (savedRegisters[i] != null) {
146 keys[mapIndex] = savedRegisters[i];
147 assert isStackSlot(slots[i]) : "not a StackSlot: " + slots[i];
148 StackSlot slot = asStackSlot(slots[i]);
149 values[mapIndex] = indexForStackSlot(frameMap, slot);
150 mapIndex++;
151 }
152 }
153 assert mapIndex == total;
154 }
155 return new RegisterSaveLayout(keys, values);
156 }
157
158 /**
159 * Computes the index of a stack slot relative to slot 0. This is also the bit index of stack
160 * slots in the reference map.
161 *
162 * @param slot a stack slot
163 * @return the index of the stack slot
164 */
165 private static int indexForStackSlot(FrameMap frameMap, StackSlot slot) {
166 assert frameMap.offsetForStackSlot(slot) % frameMap.getTarget().wordSize == 0;
167 int value = frameMap.offsetForStackSlot(slot) / frameMap.getTarget().wordSize;
168 return value;
169 }
170 }
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1 /*
2 * Copyright (c) 2013, 2019, 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 package org.graalvm.compiler.lir.aarch64;
26
27 import static jdk.vm.ci.code.ValueUtil.asStackSlot;
28 import static jdk.vm.ci.code.ValueUtil.isStackSlot;
29
30 import jdk.internal.vm.compiler.collections.EconomicSet;
31 import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler;
32 import org.graalvm.compiler.lir.LIRInstructionClass;
33 import org.graalvm.compiler.lir.Opcode;
34 import org.graalvm.compiler.lir.StandardOp.SaveRegistersOp;
35 import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
36
37 import jdk.vm.ci.code.Register;
38 import jdk.vm.ci.code.StackSlot;
39 import jdk.vm.ci.meta.AllocatableValue;
40
41 /**
42 * Saves registers to stack slots.
43 */
44 @Opcode("SAVE_REGISTER")
45 public class AArch64SaveRegistersOp extends SaveRegistersOp {
46 public static final LIRInstructionClass<AArch64SaveRegistersOp> TYPE = LIRInstructionClass.create(AArch64SaveRegistersOp.class);
47
48 /**
49 *
50 * @param savedRegisters the registers saved by this operation which may be subject to
51 * {@linkplain #remove(EconomicSet) pruning}
52 * @param savedRegisterLocations the slots to which the registers are saved
53 */
54 public AArch64SaveRegistersOp(Register[] savedRegisters, AllocatableValue[] savedRegisterLocations) {
55 super(TYPE, savedRegisters, savedRegisterLocations);
56 }
57
58 protected void saveRegister(CompilationResultBuilder crb, AArch64MacroAssembler masm, StackSlot result, Register input) {
59 AArch64Move.reg2stack(crb, masm, result, input.asValue());
60 }
61
62 @Override
63 public void emitCode(CompilationResultBuilder crb) {
64 AArch64MacroAssembler masm = (AArch64MacroAssembler) crb.asm;
65 for (int i = 0; i < savedRegisters.length; i++) {
66 if (savedRegisters[i] != null) {
67 assert isStackSlot(slots[i]) : "not a StackSlot: " + slots[i];
68 saveRegister(crb, masm, asStackSlot(slots[i]), savedRegisters[i]);
69 }
70 }
71 }
72 }
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