use of org.jikesrvm.compilers.opt.ir.ppc.PhysicalRegisterSet in project JikesRVM by JikesRVM.
the class StackManager method saveVolatiles.
/**
* Insert code in the prologue to save the
* volatile registers.
*
* @param inst
*/
private void saveVolatiles(Instruction inst) {
PhysicalRegisterSet phys = ir.regpool.getPhysicalRegisterSet().asPPC();
// 1. save the volatile GPRs
Register FP = phys.getFP();
int i = 0;
for (Enumeration<Register> e = phys.enumerateVolatileGPRs(); e.hasMoreElements(); i++) {
Register r = e.nextElement();
int location = saveVolatileGPRLocation[i];
inst.insertBefore(MIR_Store.create(PPC_STAddr, A(r), A(FP), IC(location)));
}
// 2. save the volatile FPRs
i = 0;
for (Enumeration<Register> e = phys.enumerateVolatileFPRs(); e.hasMoreElements(); i++) {
Register r = e.nextElement();
int location = saveVolatileFPRLocation[i];
inst.insertBefore(MIR_Store.create(PPC_STFD, D(r), A(FP), IC(location)));
}
// 3. Save some special registers
Register temp = phys.getTemp();
inst.insertBefore(MIR_Move.create(PPC_MFSPR, I(temp), I(phys.getXER())));
inst.insertBefore(MIR_Store.create(PPC_STW, I(temp), A(FP), IC(saveXERLocation)));
inst.insertBefore(MIR_Move.create(PPC_MFSPR, A(temp), A(phys.getCTR())));
inst.insertBefore(MIR_Store.create(PPC_STAddr, A(temp), A(FP), IC(saveCTRLocation)));
}
use of org.jikesrvm.compilers.opt.ir.ppc.PhysicalRegisterSet in project JikesRVM by JikesRVM.
the class StackManager method restoreVolatileRegisters.
/**
* Insert code before a return instruction to restore the
* volatile registers.
*
* @param inst the return instruction
*/
private void restoreVolatileRegisters(Instruction inst) {
PhysicalRegisterSet phys = ir.regpool.getPhysicalRegisterSet().asPPC();
// 1. restore the volatile GPRs
Register FP = phys.getFP();
int i = 0;
for (Enumeration<Register> e = phys.enumerateVolatileGPRs(); e.hasMoreElements(); i++) {
Register r = e.nextElement();
int location = saveVolatileGPRLocation[i];
inst.insertBefore(MIR_Load.create(PPC_LAddr, A(r), A(FP), IC(location)));
}
// 2. restore the volatile FPRs
i = 0;
for (Enumeration<Register> e = phys.enumerateVolatileFPRs(); e.hasMoreElements(); i++) {
Register r = e.nextElement();
int location = saveVolatileFPRLocation[i];
inst.insertBefore(MIR_Load.create(PPC_LFD, D(r), A(FP), IC(location)));
}
// 3. Restore some special registers
Register temp = phys.getTemp();
inst.insertBefore(MIR_Load.create(PPC_LInt, I(temp), A(FP), IC(saveXERLocation)));
inst.insertBefore(MIR_Move.create(PPC_MTSPR, I(phys.getXER()), I(temp)));
inst.insertBefore(MIR_Load.create(PPC_LAddr, A(temp), A(FP), IC(saveCTRLocation)));
inst.insertBefore(MIR_Move.create(PPC_MTSPR, A(phys.getCTR()), A(temp)));
}
use of org.jikesrvm.compilers.opt.ir.ppc.PhysicalRegisterSet in project JikesRVM by JikesRVM.
the class StackManager method insertNormalPrologue.
/*
* Insert the prologue.
* The available scratch registers are normally: R0, S0, S1
* However, if this is the prologue for a 'save volatile' frame,
* then R0 is the only available scratch register.
* The "normal" prologue must perform the following tasks:
* stack overflow check
* set TSR for the yieldpoint if there is a prologue yieldpoint instruction
* save lr
* store cmid
* buy stack frame
* store any used non volatiles
* We schedule the prologue for this combination of operations,
* since it is currently the common case.
* When this changes, this code should be modifed accordingly.
* The desired sequence is:
* 1 mflr 00 # return addr
* 2 l S1 takeYieldpointOffset(PR) # setting TSR for yield point
* 3 stu FP -frameSize(FP) # buy frame, save caller's fp
* 4 l S0 stackLimitOffset(S0) # stack overflow check
* 5 <save used non volatiles>
* 6 cmpi TSR S1 0x0 # setting TSR for yield point (S1 is now free)
* 7 lil S1 CMID # cmid
* 8 st 00 STACKFRAME_RETURN_ADDRESS_OFFSET(FP) # return addr (00 is now free)
* 9 st S1 STACKFRAME_METHOD_ID_OFFSET(FP) # cmid
* 10 tgt S0, FP # stack overflow check (already bought frame)
*/
/**
* Schedule prologue for 'normal' case (see above)
*/
@Override
public void insertNormalPrologue() {
PhysicalRegisterSet phys = ir.regpool.getPhysicalRegisterSet().asPPC();
Register FP = phys.getFP();
Register TR = phys.getTR();
Register TSR = phys.getTSR();
Register R0 = phys.getTemp();
Register S0 = phys.getGPR(FIRST_SCRATCH_GPR);
Register S1 = phys.getGPR(LAST_SCRATCH_GPR);
boolean interruptible = ir.method.isInterruptible();
boolean stackOverflow = interruptible;
boolean yp = hasPrologueYieldpoint();
int frameFixedSize = getFrameFixedSize();
ir.compiledMethod.setFrameFixedSize(frameFixedSize);
if (frameFixedSize >= STACK_SIZE_GUARD || ir.compiledMethod.isSaveVolatile()) {
insertExceptionalPrologue();
return;
}
Instruction ptr = ir.firstInstructionInCodeOrder().nextInstructionInCodeOrder();
if (VM.VerifyAssertions)
VM._assert(ptr.getOpcode() == IR_PROLOGUE_opcode);
// 1
ptr.insertBefore(MIR_Move.create(PPC_MFSPR, A(R0), A(phys.getLR())));
if (yp) {
Offset offset = Entrypoints.takeYieldpointField.getOffset();
if (VM.VerifyAssertions)
VM._assert(fits(offset, 16));
// 2
ptr.insertBefore(MIR_Load.create(PPC_LInt, I(S1), A(TR), IC(PPCMaskLower16(offset))));
}
// 3
ptr.insertBefore(MIR_StoreUpdate.create(PPC_STAddrU, A(FP), A(FP), IC(-frameSize)));
if (stackOverflow) {
Offset offset = Entrypoints.stackLimitField.getOffset();
if (VM.VerifyAssertions)
VM._assert(fits(offset, 16));
// 4
ptr.insertBefore(MIR_Load.create(PPC_LAddr, A(S0), A(phys.getTR()), IC(PPCMaskLower16(offset))));
}
// Now add any instructions to save the volatiles and nonvolatiles (5)
saveNonVolatiles(ptr);
if (yp) {
// 6
ptr.insertBefore(MIR_Binary.create(PPC_CMPI, I(TSR), I(S1), IC(0)));
}
int cmid = ir.compiledMethod.getId();
if (cmid <= 0x7fff) {
// 7
ptr.insertBefore(MIR_Unary.create(PPC_LDI, I(S1), IC(cmid)));
} else {
// 7 (a)
ptr.insertBefore(MIR_Unary.create(PPC_LDIS, I(S1), IC(cmid >>> 16)));
// 7 (b)
ptr.insertBefore(MIR_Binary.create(PPC_ORI, I(S1), I(S1), IC(cmid & 0xffff)));
}
ptr.insertBefore(MIR_Store.create(PPC_STAddr, A(R0), A(FP), // 8
IC(frameSize + STACKFRAME_RETURN_ADDRESS_OFFSET.toInt())));
// 9
ptr.insertBefore(MIR_Store.create(PPC_STW, I(S1), A(FP), IC(STACKFRAME_METHOD_ID_OFFSET.toInt())));
if (stackOverflow) {
// Mutate the Prologue instruction into the trap
MIR_Trap.mutate(ptr, PPC_TAddr, PowerPCTrapOperand.GREATER(), A(S0), A(FP), // 10
TrapCodeOperand.StackOverflow());
} else {
// no stack overflow test, so we remove the IR_Prologue instruction
ptr.remove();
}
}
use of org.jikesrvm.compilers.opt.ir.ppc.PhysicalRegisterSet in project JikesRVM by JikesRVM.
the class StackManager method insertUnspillBefore.
/**
* Insert a load of a physical register from a spill location before
* instruction s.
*
* @param s the instruction before which the spill should occur
* @param r the register (should be physical) to spill
* @param type one of INT_VALUE, FLOAT_VALUE, DOUBLE_VALUE, or
* CONDITION_VALUE
* @param location the spill location
*/
@Override
public void insertUnspillBefore(Instruction s, Register r, Register type, int location) {
PhysicalRegisterSet phys = ir.regpool.getPhysicalRegisterSet().asPPC();
Register FP = phys.getFP();
if (type.isCondition()) {
Register temp = phys.getTemp();
s.insertBefore(MIR_Load.create(PPC_LWZ, I(temp), A(FP), IC(location + BYTES_IN_ADDRESS - BYTES_IN_INT)));
} else if (type.isDouble()) {
s.insertBefore(MIR_Load.create(PPC_LFD, D(r), A(FP), IC(location)));
} else if (type.isFloat()) {
s.insertBefore(MIR_Load.create(PPC_LFS, F(r), A(FP), IC(location + BYTES_IN_ADDRESS - BYTES_IN_FLOAT)));
} else if (type.isNatural()) {
// integer or half of long
s.insertBefore(MIR_Load.create(PPC_LAddr, A(r), A(FP), IC(location)));
} else {
throw new OptimizingCompilerException("insertUnspillBefore", "unknown type:" + type);
}
}
use of org.jikesrvm.compilers.opt.ir.ppc.PhysicalRegisterSet in project JikesRVM by JikesRVM.
the class StackManager method insertEpilogue.
/**
* Insert the epilogue before a particular return instruction.
*
* @param ret the return instruction.
*/
private void insertEpilogue(Instruction ret) {
// 1. Restore any saved registers
if (ir.compiledMethod.isSaveVolatile()) {
restoreVolatileRegisters(ret);
}
restoreNonVolatiles(ret);
// 2. Restore return address
PhysicalRegisterSet phys = ir.regpool.getPhysicalRegisterSet().asPPC();
Register temp = phys.getTemp();
Register FP = phys.getFP();
ret.insertBefore(MIR_Load.create(PPC_LAddr, A(temp), A(FP), IC(STACKFRAME_RETURN_ADDRESS_OFFSET.toInt() + frameSize)));
// 3. Load return address into LR
ret.insertBefore(MIR_Move.create(PPC_MTSPR, A(phys.getLR()), A(phys.getTemp())));
// 4. Restore old FP
ret.insertBefore(MIR_Binary.create(PPC_ADDI, A(FP), A(FP), IC(frameSize)));
}
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