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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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package org.graalvm.compiler.hotspot.sparc;
import static org.graalvm.compiler.asm.sparc.SPARCAssembler.isSimm13;
import static org.graalvm.compiler.lir.LIRValueUtil.asJavaConstant;
import static org.graalvm.compiler.lir.LIRValueUtil.isJavaConstant;
import static jdk.vm.ci.code.ValueUtil.asRegister;
import org.graalvm.compiler.asm.Assembler;
import org.graalvm.compiler.asm.sparc.SPARCAddress;
import org.graalvm.compiler.asm.sparc.SPARCAssembler;
import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler;
import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler.ScratchRegister;
import org.graalvm.compiler.hotspot.HotSpotCounterOp;
import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
import org.graalvm.compiler.hotspot.meta.HotSpotRegistersProvider;
import org.graalvm.compiler.lir.LIRInstructionClass;
import org.graalvm.compiler.lir.Opcode;
import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
import jdk.vm.ci.code.Register;
import jdk.vm.ci.code.TargetDescription;
import jdk.vm.ci.meta.Value;
@Opcode("BenchMarkCounter")
public class SPARCHotSpotCounterOp extends HotSpotCounterOp {
public static final LIRInstructionClass<SPARCHotSpotCounterOp> TYPE = LIRInstructionClass.create(SPARCHotSpotCounterOp.class);
private int[] counterPatchOffsets;
public SPARCHotSpotCounterOp(String name, String group, Value increment, HotSpotRegistersProvider registers, GraalHotSpotVMConfig config) {
super(TYPE, name, group, increment, registers, config);
this.counterPatchOffsets = new int[1];
}
public SPARCHotSpotCounterOp(String[] names, String[] groups, Value[] increments, HotSpotRegistersProvider registers, GraalHotSpotVMConfig config) {
super(TYPE, names, groups, increments, registers, config);
this.counterPatchOffsets = new int[names.length];
}
@Override
public void emitCode(CompilationResultBuilder crb) {
SPARCMacroAssembler masm = (SPARCMacroAssembler) crb.asm;
TargetDescription target = crb.target;
// address for counters array
SPARCAddress countersArrayAddr = new SPARCAddress(thread, config.jvmciCountersThreadOffset);
try (ScratchRegister scratch = masm.getScratchRegister()) {
Register countersArrayReg = scratch.getRegister();
// load counters array
masm.ldx(countersArrayAddr, countersArrayReg);
IncrementEmitter emitter = new IncrementEmitter(countersArrayReg, masm);
forEachCounter(emitter, target);
}
}
private void emitIncrement(int counterIndex, SPARCMacroAssembler masm, SPARCAddress counterAddr, Value increment) {
try (ScratchRegister scratch = masm.getScratchRegister()) {
Register counterReg = scratch.getRegister();
// load counter value
masm.ldx(counterAddr, counterReg);
counterPatchOffsets[counterIndex] = masm.position();
// increment counter
if (isJavaConstant(increment)) {
masm.add(counterReg, asInt(asJavaConstant(increment)), counterReg);
} else {
masm.add(counterReg, asRegister(increment), counterReg);
}
// store counter value
masm.stx(counterReg, counterAddr);
}
}
/**
* Patches the increment value in the instruction emitted by the
* {@link #emitIncrement(int, SPARCMacroAssembler, SPARCAddress, Value)} method. This method is
* used if patching is needed after assembly.
*
* @param asm
* @param increment
*/
@Override
public void patchCounterIncrement(Assembler asm, int[] increment) {
for (int i = 0; i < increment.length; i++) {
int inst = counterPatchOffsets[i];
((SPARCAssembler) asm).patchAddImmediate(inst, increment[i]);
}
}
public int[] getCounterPatchOffsets() {
return counterPatchOffsets;
}
private class IncrementEmitter implements CounterProcedure {
private int lastDisplacement = 0;
private final Register countersArrayReg;
private final SPARCMacroAssembler masm;
IncrementEmitter(Register countersArrayReg, SPARCMacroAssembler masm) {
super();
this.countersArrayReg = countersArrayReg;
this.masm = masm;
}
@Override
public void apply(int counterIndex, Value increment, int displacement) {
SPARCAddress counterAddr;
int relativeDisplacement = displacement - lastDisplacement;
if (isSimm13(relativeDisplacement)) { // Displacement fits into ld instruction
counterAddr = new SPARCAddress(countersArrayReg, relativeDisplacement);
} else {
try (ScratchRegister scratch = masm.getScratchRegister()) {
Register tempOffsetRegister = scratch.getRegister();
masm.setx(relativeDisplacement, tempOffsetRegister, false);
masm.add(countersArrayReg, tempOffsetRegister, countersArrayReg);
}
lastDisplacement = displacement;
counterAddr = new SPARCAddress(countersArrayReg, 0);
}
emitIncrement(counterIndex, masm, counterAddr, increment);
}
}
}