--- /dev/null 2016-05-31 09:42:47.975716356 -0700 +++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.lir.sparc/src/org/graalvm/compiler/lir/sparc/SPARCSaveRegistersOp.java 2016-12-09 00:53:55.298037638 -0800 @@ -0,0 +1,178 @@ +/* + * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * 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. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ +package org.graalvm.compiler.lir.sparc; + +import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.STACK; +import static org.graalvm.compiler.lir.sparc.SPARCDelayedControlTransfer.DUMMY; +import static jdk.vm.ci.code.ValueUtil.asStackSlot; +import static jdk.vm.ci.code.ValueUtil.isStackSlot; + +import java.util.Arrays; +import java.util.Set; + +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.LIRValueUtil; +import org.graalvm.compiler.lir.Opcode; +import org.graalvm.compiler.lir.StandardOp.SaveRegistersOp; +import org.graalvm.compiler.lir.asm.CompilationResultBuilder; +import org.graalvm.compiler.lir.framemap.FrameMap; + +import jdk.vm.ci.code.Register; +import jdk.vm.ci.code.RegisterSaveLayout; +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 SPARCLIRInstruction implements SaveRegistersOp { + public static final LIRInstructionClass TYPE = LIRInstructionClass.create(SPARCSaveRegistersOp.class); + public static final Register RETURN_REGISTER_STORAGE = SPARC.d62; + public static final SizeEstimate SIZE = SizeEstimate.create(32); + /** + * The registers (potentially) saved by this operation. + */ + protected final Register[] savedRegisters; + + /** + * The slots to which the registers are saved. + */ + @Def(STACK) protected final AllocatableValue[] slots; + + /** + * Specifies if {@link #remove(Set)} should have an effect. + */ + protected final boolean supportsRemove; + + /** + * + * @param savedRegisters the registers saved by this operation which may be subject to + * {@linkplain #remove(Set) pruning} + * @param savedRegisterLocations the slots to which the registers are saved + * @param supportsRemove determines if registers can be {@linkplain #remove(Set) pruned} + */ + public SPARCSaveRegistersOp(Register[] savedRegisters, AllocatableValue[] savedRegisterLocations, boolean supportsRemove) { + super(TYPE, SIZE); + assert Arrays.asList(savedRegisterLocations).stream().allMatch(LIRValueUtil::isVirtualStackSlot); + this.savedRegisters = savedRegisters; + this.slots = savedRegisterLocations; + this.supportsRemove = supportsRemove; + } + + @Override + public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) { + // 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); + } + } + } + + public AllocatableValue[] getSlots() { + return slots; + } + + @Override + public boolean supportsRemove() { + return supportsRemove; + } + + @Override + public int remove(Set doNotSave) { + if (!supportsRemove) { + throw new UnsupportedOperationException(); + } + return prune(doNotSave, savedRegisters); + } + + static int prune(Set toRemove, Register[] registers) { + int pruned = 0; + for (int i = 0; i < registers.length; i++) { + if (registers[i] != null) { + if (toRemove.contains(registers[i])) { + registers[i] = null; + pruned++; + } + } + } + return pruned; + } + + @Override + public RegisterSaveLayout getMap(FrameMap frameMap) { + int total = 0; + for (int i = 0; i < savedRegisters.length; i++) { + if (savedRegisters[i] != null) { + total++; + } + } + Register[] keys = new Register[total]; + int[] values = new int[total]; + if (total != 0) { + int mapIndex = 0; + for (int i = 0; i < savedRegisters.length; i++) { + if (savedRegisters[i] != null) { + keys[mapIndex] = savedRegisters[i]; + assert isStackSlot(slots[i]) : "not a StackSlot: " + slots[i]; + StackSlot slot = asStackSlot(slots[i]); + values[mapIndex] = indexForStackSlot(frameMap, slot); + mapIndex++; + } + } + assert mapIndex == total; + } + return new RegisterSaveLayout(keys, values); + } + + /** + * Computes the index of a stack slot relative to slot 0. This is also the bit index of stack + * slots in the reference map. + * + * @param slot a stack slot + * @return the index of the stack slot + */ + private static int indexForStackSlot(FrameMap frameMap, StackSlot slot) { + assert frameMap.offsetForStackSlot(slot) % frameMap.getTarget().wordSize == 0; + int value = frameMap.offsetForStackSlot(slot) / frameMap.getTarget().wordSize; + return value; + } +}