Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.lir.sparc/src/com/oracle/graal/lir/sparc/SPARCControlFlow.java @ 16322:f96d9c455da5
Fixing dcmp
author | Stefan Anzinger <stefan.anzinger@gmail.com> |
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date | Thu, 05 Jun 2014 15:28:25 +0200 |
parents | 151fe6b1e511 |
children | f22e4fd06a7e |
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/* * Copyright (c) 2013, 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 com.oracle.graal.lir.sparc; import static com.oracle.graal.api.code.ValueUtil.*; import static com.oracle.graal.lir.LIRInstruction.OperandFlag.*; import com.oracle.graal.api.code.CompilationResult.JumpTable; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.asm.*; import com.oracle.graal.asm.sparc.*; import com.oracle.graal.asm.sparc.SPARCAssembler.Bpe; import com.oracle.graal.asm.sparc.SPARCAssembler.Bpg; import com.oracle.graal.asm.sparc.SPARCAssembler.Bpge; import com.oracle.graal.asm.sparc.SPARCAssembler.Bpgu; import com.oracle.graal.asm.sparc.SPARCAssembler.Bpl; import com.oracle.graal.asm.sparc.SPARCAssembler.Bple; import com.oracle.graal.asm.sparc.SPARCAssembler.Bpleu; import com.oracle.graal.asm.sparc.SPARCAssembler.Bpne; import com.oracle.graal.asm.sparc.SPARCAssembler.CC; import com.oracle.graal.asm.sparc.SPARCAssembler.ConditionFlag; import com.oracle.graal.asm.sparc.SPARCAssembler.FCond; import com.oracle.graal.asm.sparc.SPARCAssembler.Fbfcc; import com.oracle.graal.asm.sparc.SPARCAssembler.Movcc; import com.oracle.graal.asm.sparc.SPARCAssembler.Sub; import com.oracle.graal.asm.sparc.SPARCMacroAssembler.Bpgeu; import com.oracle.graal.asm.sparc.SPARCMacroAssembler.Bplu; import com.oracle.graal.asm.sparc.SPARCMacroAssembler.Cmp; import com.oracle.graal.asm.sparc.SPARCMacroAssembler.Jmp; import com.oracle.graal.asm.sparc.SPARCMacroAssembler.Nop; import com.oracle.graal.asm.sparc.SPARCMacroAssembler.Ret; import com.oracle.graal.compiler.common.*; import com.oracle.graal.compiler.common.calc.*; import com.oracle.graal.lir.*; import com.oracle.graal.lir.StandardOp.BlockEndOp; import com.oracle.graal.lir.SwitchStrategy.BaseSwitchClosure; import com.oracle.graal.lir.asm.*; public class SPARCControlFlow { public static class ReturnOp extends SPARCLIRInstruction implements BlockEndOp { @Use({REG, ILLEGAL}) protected Value x; public ReturnOp(Value x) { this.x = x; } @Override public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) { emitCodeHelper(crb, masm); } public static void emitCodeHelper(CompilationResultBuilder crb, SPARCMacroAssembler masm) { new Ret().emit(masm); // On SPARC we always leave the frame (in the delay slot). crb.frameContext.leave(crb); } } public static class BranchOp extends SPARCLIRInstruction implements StandardOp.BranchOp { protected final Condition condition; protected final LabelRef trueDestination; protected final LabelRef falseDestination; protected final Kind kind; public BranchOp(Condition condition, LabelRef trueDestination, LabelRef falseDestination, Kind kind) { this.condition = condition; this.trueDestination = trueDestination; this.falseDestination = falseDestination; this.kind = kind; } @Override public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) { Label actualTarget; Condition actualCondition; boolean needJump; if (crb.isSuccessorEdge(trueDestination)) { actualCondition = condition.negate(); actualTarget = falseDestination.label(); needJump = false; } else { actualCondition = condition; actualTarget = trueDestination.label(); needJump = !crb.isSuccessorEdge(falseDestination); } assert kind == Kind.Int || kind == Kind.Long || kind == Kind.Object; CC cc = kind == Kind.Int ? CC.Icc : CC.Xcc; emitCompare(masm, actualTarget, actualCondition, cc); new Nop().emit(masm); // delay slot if (needJump) { masm.jmp(falseDestination.label()); } } } private static void emitCompare(SPARCMacroAssembler masm, Label target, Condition actualCondition, CC cc) { switch (actualCondition) { case EQ: new Bpe(cc, target).emit(masm); break; case NE: new Bpne(cc, target).emit(masm); break; case BT: new Bplu(cc, target).emit(masm); break; case LT: new Bpl(cc, target).emit(masm); break; case BE: new Bpleu(cc, target).emit(masm); break; case LE: new Bple(cc, target).emit(masm); break; case GE: new Bpge(cc, target).emit(masm); break; case AE: new Bpgeu(cc, target).emit(masm); break; case GT: new Bpg(cc, target).emit(masm); break; case AT: new Bpgu(cc, target).emit(masm); break; default: throw GraalInternalError.shouldNotReachHere(); } } public static class StrategySwitchOp extends SPARCLIRInstruction implements BlockEndOp { @Use({CONST}) protected Constant[] keyConstants; private final LabelRef[] keyTargets; private LabelRef defaultTarget; @Alive({REG}) protected Value key; @Temp({REG, ILLEGAL}) protected Value scratch; private final SwitchStrategy strategy; public StrategySwitchOp(SwitchStrategy strategy, LabelRef[] keyTargets, LabelRef defaultTarget, Value key, Value scratch) { this.strategy = strategy; this.keyConstants = strategy.keyConstants; this.keyTargets = keyTargets; this.defaultTarget = defaultTarget; this.key = key; this.scratch = scratch; assert keyConstants.length == keyTargets.length; assert keyConstants.length == strategy.keyProbabilities.length; assert (scratch.getKind() == Kind.Illegal) == (key.getKind() == Kind.Int); } @Override public void emitCode(final CompilationResultBuilder crb, final SPARCMacroAssembler masm) { final Register keyRegister = asRegister(key); BaseSwitchClosure closure = new BaseSwitchClosure(crb, masm, keyTargets, defaultTarget) { @Override protected void conditionalJump(int index, Condition condition, Label target) { switch (key.getKind()) { case Int: if (crb.codeCache.needsDataPatch(keyConstants[index])) { crb.recordInlineDataInCode(keyConstants[index]); } long lc = keyConstants[index].asLong(); assert NumUtil.isInt(lc); new Cmp(keyRegister, (int) lc).emit(masm); emitCompare(masm, target, condition, CC.Icc); break; case Long: { Register temp = asLongReg(scratch); SPARCMove.move(crb, masm, temp.asValue(Kind.Long), keyConstants[index]); new Cmp(keyRegister, temp).emit(masm); emitCompare(masm, target, condition, CC.Xcc); break; } case Object: { Register temp = asObjectReg(scratch); SPARCMove.move(crb, masm, temp.asValue(Kind.Object), keyConstants[index]); new Cmp(keyRegister, temp).emit(masm); emitCompare(masm, target, condition, CC.Ptrcc); break; } default: throw new GraalInternalError("switch only supported for int, long and object"); } new Nop().emit(masm); // delay slot } }; strategy.run(closure); } } public static class TableSwitchOp extends SPARCLIRInstruction implements BlockEndOp { private final int lowKey; private final LabelRef defaultTarget; private final LabelRef[] targets; @Alive protected Value index; @Temp protected Value scratch; public TableSwitchOp(final int lowKey, final LabelRef defaultTarget, final LabelRef[] targets, Variable index, Variable scratch) { this.lowKey = lowKey; this.defaultTarget = defaultTarget; this.targets = targets; this.index = index; this.scratch = scratch; } @Override public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) { Register value = asIntReg(index); Register scratchReg = asLongReg(scratch); // Compare index against jump table bounds int highKey = lowKey + targets.length - 1; if (lowKey != 0) { // subtract the low value from the switch value new Sub(value, lowKey, value).emit(masm); // masm.setp_gt_s32(value, highKey - lowKey); } else { // masm.setp_gt_s32(value, highKey); } // Jump to default target if index is not within the jump table if (defaultTarget != null) { new Bpgu(CC.Icc, defaultTarget.label()).emit(masm); new Nop().emit(masm); // delay slot } // Load jump table entry into scratch and jump to it // masm.movslq(value, new AMD64Address(scratch, value, Scale.Times4, 0)); // masm.addq(scratch, value); new Jmp(new SPARCAddress(scratchReg, 0)).emit(masm); new Nop().emit(masm); // delay slot // address of jump table int tablePos = masm.position(); JumpTable jt = new JumpTable(tablePos, lowKey, highKey, 4); crb.compilationResult.addAnnotation(jt); // SPARC: unimp: tableswitch extract throw GraalInternalError.unimplemented(); } } @Opcode("CMOVE") public static class CondMoveOp extends SPARCLIRInstruction { private final Kind kind; @Def({REG, HINT}) protected Value result; @Alive({REG}) protected Value trueValue; @Use({REG, STACK, CONST}) protected Value falseValue; private final ConditionFlag condition; public CondMoveOp(Kind kind, Variable result, Condition condition, Variable trueValue, Value falseValue) { this.kind = kind; this.result = result; this.condition = intCond(condition); this.trueValue = trueValue; this.falseValue = falseValue; } @Override public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) { // check that we don't overwrite an input operand before it is used. assert !result.equals(trueValue); SPARCMove.move(crb, masm, result, falseValue); cmove(crb, masm, kind, result, condition, trueValue); } } @Opcode("CMOVE") public static class FloatCondMoveOp extends SPARCLIRInstruction { private final Kind kind; @Def({REG}) protected Value result; @Alive({REG}) protected Value trueValue; @Alive({REG}) protected Value falseValue; private final ConditionFlag condition; private final boolean unorderedIsTrue; public FloatCondMoveOp(Kind kind, Variable result, Condition condition, boolean unorderedIsTrue, Variable trueValue, Variable falseValue) { this.kind = kind; this.result = result; this.condition = floatCond(condition); this.unorderedIsTrue = unorderedIsTrue; this.trueValue = trueValue; this.falseValue = falseValue; } @Override public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) { // check that we don't overwrite an input operand before it is used. assert !result.equals(trueValue); SPARCMove.move(crb, masm, result, trueValue); cmove(crb, masm, kind, result, condition, falseValue); // TODO: This may be omitted, when doing the right check beforehand (There are // instructions which control the unordered behavior as well) if (!unorderedIsTrue) { cmove(crb, masm, kind, result, ConditionFlag.F_Unordered, falseValue); } } } private static void cmove(CompilationResultBuilder crb, SPARCMacroAssembler masm, Kind kind, Value result, ConditionFlag cond, Value other) { if (!isRegister(other)) { SPARCMove.move(crb, masm, result, other); throw GraalInternalError.shouldNotReachHere("result should be scratch"); } assert !asRegister(other).equals(asRegister(result)) : "other already overwritten by previous move"; switch (kind) { case Int: new Movcc(cond, CC.Icc, asRegister(other), asRegister(result)).emit(masm); break; case Long: case Object: new Movcc(cond, CC.Xcc, asRegister(other), asRegister(result)).emit(masm); break; case Double: FCond fc = null; switch (cond) { case Equal: fc = FCond.Fbne; break; case Greater: fc = FCond.Fble; break; case GreaterEqual: fc = FCond.Fbl; break; case Less: fc = FCond.Fbge; break; case LessEqual: fc = FCond.Fbg; break; case F_Ordered: fc = FCond.Fbo; break; case F_Unordered: fc = FCond.Fbu; break; } new Fbfcc(masm, fc, true, 2).equals(masm); SPARCMove.move(crb, masm, result, other); break; default: throw GraalInternalError.shouldNotReachHere(); } } private static ConditionFlag intCond(Condition cond) { switch (cond) { case EQ: return ConditionFlag.Equal; case NE: return ConditionFlag.NotEqual; case LT: return ConditionFlag.Less; case LE: return ConditionFlag.LessEqual; case GE: return ConditionFlag.GreaterEqual; case GT: return ConditionFlag.Greater; case BE: case AE: case AT: case BT: default: throw GraalInternalError.shouldNotReachHere(); } } private static ConditionFlag floatCond(Condition cond) { switch (cond) { case EQ: return ConditionFlag.Equal; case NE: return ConditionFlag.NotEqual; case LT: return ConditionFlag.Less; case LE: return ConditionFlag.LessEqual; case GE: return ConditionFlag.GreaterEqual; case GT: return ConditionFlag.Greater; default: throw GraalInternalError.shouldNotReachHere("Unimplemented for " + cond); } } }