src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.lir.sparc/src/org/graalvm/compiler/lir/sparc/SPARCSaveRegistersOp.java
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package org.graalvm.compiler.lir.sparc;
import static jdk.vm.ci.code.ValueUtil.asStackSlot;
import static jdk.vm.ci.code.ValueUtil.isStackSlot;
import static org.graalvm.compiler.lir.sparc.SPARCDelayedControlTransfer.DUMMY;
import jdk.internal.vm.compiler.collections.EconomicSet;
import org.graalvm.compiler.asm.sparc.SPARCAddress;
import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler;
import org.graalvm.compiler.lir.LIRInstructionClass;
import org.graalvm.compiler.lir.Opcode;
import org.graalvm.compiler.lir.StandardOp.SaveRegistersOp;
import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
import jdk.vm.ci.code.Register;
import jdk.vm.ci.code.RegisterValue;
import jdk.vm.ci.code.StackSlot;
import jdk.vm.ci.meta.AllocatableValue;
import jdk.vm.ci.sparc.SPARC;
/**
* Saves registers to stack slots.
*/
@Opcode("SAVE_REGISTER")
public class SPARCSaveRegistersOp extends SaveRegistersOp implements SPARCLIRInstructionMixin {
public static final LIRInstructionClass<SPARCSaveRegistersOp> TYPE = LIRInstructionClass.create(SPARCSaveRegistersOp.class);
public static final Register RETURN_REGISTER_STORAGE = SPARC.d62;
public static final SizeEstimate SIZE = SizeEstimate.create(32);
private final SPARCLIRInstructionMixinStore store;
/**
*
* @param savedRegisters the registers saved by this operation which may be subject to
* {@linkplain #remove(EconomicSet) pruning}
* @param savedRegisterLocations the slots to which the registers are saved
*/
public SPARCSaveRegistersOp(Register[] savedRegisters, AllocatableValue[] savedRegisterLocations) {
super(TYPE, savedRegisters, savedRegisterLocations);
this.store = new SPARCLIRInstructionMixinStore(SIZE);
}
@Override
public void emitCode(CompilationResultBuilder crb) {
SPARCMacroAssembler masm = (SPARCMacroAssembler) crb.asm;
// Can be used with VIS3
// new Movxtod(SPARC.i0, RETURN_REGISTER_STORAGE).emit(masm);
// We abuse the first stackslot for transferring i0 to return_register_storage
// assert slots.length >= 1;
SPARCAddress slot0Address = (SPARCAddress) crb.asAddress(slots[0]);
masm.stx(SPARC.i0, slot0Address);
masm.lddf(slot0Address, RETURN_REGISTER_STORAGE);
// Now save the registers
for (int i = 0; i < savedRegisters.length; i++) {
if (savedRegisters[i] != null) {
assert isStackSlot(slots[i]) : "not a StackSlot: " + slots[i];
Register savedRegister = savedRegisters[i];
StackSlot slot = asStackSlot(slots[i]);
SPARCAddress slotAddress = (SPARCAddress) crb.asAddress(slot);
RegisterValue input = savedRegister.asValue(slot.getValueKind());
SPARCMove.emitStore(input, slotAddress, slot.getPlatformKind(), DUMMY, null, crb, masm);
}
}
}
@Override
public SPARCLIRInstructionMixinStore getSPARCLIRInstructionStore() {
return store;
}
}