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 package org.graalvm.compiler.lir.amd64;
24
25 import static org.graalvm.compiler.lir.amd64.AMD64SaveRegistersOp.prune;
26
27 import java.util.Set;
28
29 import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler;
30 import org.graalvm.compiler.lir.LIRInstructionClass;
31 import org.graalvm.compiler.lir.Opcode;
32 import org.graalvm.compiler.lir.StandardOp.SaveRegistersOp;
33 import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
34 import org.graalvm.compiler.lir.framemap.FrameMap;
35
36 import jdk.vm.ci.code.Register;
37 import jdk.vm.ci.code.RegisterSaveLayout;
38 import jdk.vm.ci.meta.JavaConstant;
39
40 /**
41 * Writes well known garbage values to registers.
42 */
43 @Opcode("ZAP_REGISTER")
44 public final class AMD64ZapRegistersOp extends AMD64LIRInstruction implements SaveRegistersOp {
45 public static final LIRInstructionClass<AMD64ZapRegistersOp> TYPE = LIRInstructionClass.create(AMD64ZapRegistersOp.class);
46
47 /**
48 * The registers that are zapped.
49 */
50 protected final Register[] zappedRegisters;
51
52 /**
53 * The garbage values that are written to the registers.
54 */
59 this.zappedRegisters = zappedRegisters;
60 this.zapValues = zapValues;
61 }
62
63 @Override
64 public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) {
65 for (int i = 0; i < zappedRegisters.length; i++) {
66 Register reg = zappedRegisters[i];
67 if (reg != null) {
68 AMD64Move.const2reg(crb, masm, reg, zapValues[i]);
69 }
70 }
71 }
72
73 @Override
74 public boolean supportsRemove() {
75 return true;
76 }
77
78 @Override
79 public int remove(Set<Register> doNotSave) {
80 return prune(doNotSave, zappedRegisters);
81 }
82
83 @Override
84 public RegisterSaveLayout getMap(FrameMap frameMap) {
85 return new RegisterSaveLayout(new Register[0], new int[0]);
86 }
87 }
|
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 package org.graalvm.compiler.lir.amd64;
24
25 import static org.graalvm.compiler.lir.amd64.AMD64SaveRegistersOp.prune;
26
27 import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler;
28 import org.graalvm.compiler.lir.LIRInstructionClass;
29 import org.graalvm.compiler.lir.Opcode;
30 import org.graalvm.compiler.lir.StandardOp.SaveRegistersOp;
31 import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
32 import org.graalvm.compiler.lir.framemap.FrameMap;
33 import org.graalvm.util.EconomicSet;
34
35 import jdk.vm.ci.code.Register;
36 import jdk.vm.ci.code.RegisterSaveLayout;
37 import jdk.vm.ci.meta.JavaConstant;
38
39 /**
40 * Writes well known garbage values to registers.
41 */
42 @Opcode("ZAP_REGISTER")
43 public final class AMD64ZapRegistersOp extends AMD64LIRInstruction implements SaveRegistersOp {
44 public static final LIRInstructionClass<AMD64ZapRegistersOp> TYPE = LIRInstructionClass.create(AMD64ZapRegistersOp.class);
45
46 /**
47 * The registers that are zapped.
48 */
49 protected final Register[] zappedRegisters;
50
51 /**
52 * The garbage values that are written to the registers.
53 */
58 this.zappedRegisters = zappedRegisters;
59 this.zapValues = zapValues;
60 }
61
62 @Override
63 public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) {
64 for (int i = 0; i < zappedRegisters.length; i++) {
65 Register reg = zappedRegisters[i];
66 if (reg != null) {
67 AMD64Move.const2reg(crb, masm, reg, zapValues[i]);
68 }
69 }
70 }
71
72 @Override
73 public boolean supportsRemove() {
74 return true;
75 }
76
77 @Override
78 public int remove(EconomicSet<Register> doNotSave) {
79 return prune(doNotSave, zappedRegisters);
80 }
81
82 @Override
83 public RegisterSaveLayout getMap(FrameMap frameMap) {
84 return new RegisterSaveLayout(new Register[0], new int[0]);
85 }
86 }
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