MemOperand MoveEmitterARM64::toMemOperand(const MoveOperand& operand) const {
MOZ_ASSERT(operand.isMemory());
ARMRegister base(operand.base(), 64);
if (operand.base() == masm.getStackPointer()) {
return MemOperand(base,
operand.disp() + (masm.framePushed() - pushedAtStart_));
}
return MemOperand(base, operand.disp());
}
Address
MoveEmitterX86::toAddress(const MoveOperand& operand) const
{
if (operand.base() != StackPointer)
return Address(operand.base(), operand.disp());
MOZ_ASSERT(operand.disp() >= 0);
// Otherwise, the stack offset may need to be adjusted.
return Address(StackPointer, operand.disp() + (masm.framePushed() - pushedAtStart_));
}
Address
MoveEmitterARM::toAddress(const MoveOperand& operand) const
{
MOZ_ASSERT(operand.isMemoryOrEffectiveAddress());
if (operand.base() != StackPointer) {
MOZ_ASSERT(operand.disp() < 1024 && operand.disp() > -1024);
return Operand(operand.base(), operand.disp()).toAddress();
}
MOZ_ASSERT(operand.disp() >= 0);
// Otherwise, the stack offset may need to be adjusted.
return Address(StackPointer, operand.disp() + (masm.framePushed() - pushedAtStart_));
}
void
MoveEmitterARM::emitMove(const MoveOperand &from, const MoveOperand &to)
{
if (to.isGeneralReg() && to.reg() == spilledReg_) {
// If the destination is the spilled register, make sure we
// don't re-clobber its value.
spilledReg_ = InvalidReg;
}
if (from.isGeneralReg()) {
if (from.reg() == spilledReg_) {
// If the source is a register that has been spilled, make sure
// to load the source back into that register.
masm.ma_ldr(spillSlot(), spilledReg_);
spilledReg_ = InvalidReg;
}
switch (toOperand(to, false).getTag()) {
case Operand::OP2:
// secretly must be a register
masm.ma_mov(from.reg(), to.reg());
break;
case Operand::MEM:
masm.ma_str(from.reg(), toOperand(to, false));
break;
default:
MOZ_ASSUME_UNREACHABLE("strange move!");
}
} else if (to.isGeneralReg()) {
JS_ASSERT(from.isMemory() || from.isEffectiveAddress());
if (from.isMemory())
masm.ma_ldr(toOperand(from, false), to.reg());
else
masm.ma_add(from.base(), Imm32(from.disp()), to.reg());
} else {
// Memory to memory gpr move.
Register reg = tempReg();
JS_ASSERT(from.isMemory() || from.isEffectiveAddress());
if (from.isMemory())
masm.ma_ldr(toOperand(from, false), reg);
else
masm.ma_add(from.base(), Imm32(from.disp()), reg);
JS_ASSERT(to.base() != reg);
masm.ma_str(reg, toOperand(to, false));
}
}
// Warning, do not use the resulting operand with pop instructions, since they
// compute the effective destination address after altering the stack pointer.
// Use toPopOperand if an Operand is needed for a pop.
Operand
MoveEmitterX86::toOperand(const MoveOperand &operand) const
{
if (operand.isMemory() || operand.isEffectiveAddress() || operand.isFloatAddress()) {
if (operand.base() != StackPointer)
return Operand(operand.base(), operand.disp());
JS_ASSERT(operand.disp() >= 0);
// Otherwise, the stack offset may need to be adjusted.
return Operand(StackPointer, operand.disp() + (masm.framePushed() - pushedAtStart_));
}
if (operand.isGeneralReg())
return Operand(operand.reg());
JS_ASSERT(operand.isFloatReg());
return Operand(operand.floatReg());
}
int32_t
MoveEmitterMIPS::getAdjustedOffset(const MoveOperand &operand)
{
MOZ_ASSERT(operand.isMemoryOrEffectiveAddress());
if (operand.base() != StackPointer)
return operand.disp();
// Adjust offset if stack pointer has been moved.
return operand.disp() + masm.framePushed() - pushedAtStart_;
}
void
MoveEmitterARM::emitMove(const MoveOperand& from, const MoveOperand& to)
{
// Register pairs are used to store Double values during calls.
MOZ_ASSERT(!from.isGeneralRegPair());
MOZ_ASSERT(!to.isGeneralRegPair());
if (to.isGeneralReg() && to.reg() == spilledReg_) {
// If the destination is the spilled register, make sure we
// don't re-clobber its value.
spilledReg_ = InvalidReg;
}
if (from.isGeneralReg()) {
if (from.reg() == spilledReg_) {
// If the source is a register that has been spilled, make sure
// to load the source back into that register.
masm.ma_ldr(spillSlot(), spilledReg_);
spilledReg_ = InvalidReg;
}
if (to.isMemoryOrEffectiveAddress())
masm.ma_str(from.reg(), toAddress(to));
else
masm.ma_mov(from.reg(), to.reg());
} else if (to.isGeneralReg()) {
MOZ_ASSERT(from.isMemoryOrEffectiveAddress());
if (from.isMemory())
masm.ma_ldr(toAddress(from), to.reg());
else
masm.ma_add(from.base(), Imm32(from.disp()), to.reg());
} else {
// Memory to memory gpr move.
Register reg = tempReg();
MOZ_ASSERT(from.isMemoryOrEffectiveAddress());
if (from.isMemory())
masm.ma_ldr(toAddress(from), reg);
else
masm.ma_add(from.base(), Imm32(from.disp()), reg);
MOZ_ASSERT(to.base() != reg);
masm.ma_str(reg, toAddress(to));
}
}
// This is the same as toOperand except that it computes an Operand suitable for
// use in a pop.
Operand
MoveEmitterX86::toPopOperand(const MoveOperand& operand) const
{
if (operand.isMemory()) {
if (operand.base() != StackPointer)
return Operand(operand.base(), operand.disp());
MOZ_ASSERT(operand.disp() >= 0);
// Otherwise, the stack offset may need to be adjusted.
// Note the adjustment by the stack slot here, to offset for the fact that pop
// computes its effective address after incrementing the stack pointer.
return Operand(StackPointer,
operand.disp() + (masm.framePushed() - sizeof(void*) - pushedAtStart_));
}
if (operand.isGeneralReg())
return Operand(operand.reg());
MOZ_ASSERT(operand.isFloatReg());
return Operand(operand.floatReg());
}
void
MoveEmitterMIPS::emitDoubleMove(const MoveOperand& from, const MoveOperand& to)
{
// Ensure that we can use ScratchDoubleReg in memory move.
MOZ_ASSERT_IF(from.isFloatReg(), from.floatReg() != ScratchDoubleReg);
MOZ_ASSERT_IF(to.isFloatReg(), to.floatReg() != ScratchDoubleReg);
if (from.isFloatReg()) {
if (to.isFloatReg()) {
masm.moveDouble(from.floatReg(), to.floatReg());
} else if (to.isGeneralReg()) {
// Used for passing double parameter in a2,a3 register pair.
// Two moves are added for one double parameter by
// MacroAssemblerMIPSCompat::passABIArg
if(to.reg() == a2)
masm.moveFromDoubleLo(from.floatReg(), a2);
else if(to.reg() == a3)
masm.moveFromDoubleHi(from.floatReg(), a3);
else
MOZ_CRASH("Invalid emitDoubleMove arguments.");
} else {
MOZ_ASSERT(to.isMemory());
masm.storeDouble(from.floatReg(), getAdjustedAddress(to));
}
} else if (to.isFloatReg()) {
MOZ_ASSERT(from.isMemory());
masm.loadDouble(getAdjustedAddress(from), to.floatReg());
} else if (to.isGeneralReg()) {
// Used for passing double parameter in a2,a3 register pair.
// Two moves are added for one double parameter by
// MacroAssemblerMIPSCompat::passABIArg
if (from.isMemory()) {
if(to.reg() == a2)
masm.loadPtr(getAdjustedAddress(from), a2);
else if(to.reg() == a3)
masm.loadPtr(Address(from.base(), getAdjustedOffset(from) + sizeof(uint32_t)), a3);
else
MOZ_CRASH("Invalid emitDoubleMove arguments.");
} else {
// Used for moving a double parameter from the same source. See Bug 1123874.
if(to.reg() == a2 || to.reg() == a3)
masm.ma_move(to.reg(), from.reg());
else
MOZ_CRASH("Invalid emitDoubleMove arguments.");
}
} else {
MOZ_ASSERT(from.isMemory());
MOZ_ASSERT(to.isMemory());
masm.loadDouble(getAdjustedAddress(from), ScratchDoubleReg);
masm.storeDouble(ScratchDoubleReg, getAdjustedAddress(to));
}
}
void
MoveEmitterMIPS::emitMove(const MoveOperand &from, const MoveOperand &to)
{
if (to.isGeneralReg() && to.reg() == spilledReg_) {
// If the destination is the spilled register, make sure we
// don't re-clobber its value.
spilledReg_ = InvalidReg;
}
if (from.isGeneralReg()) {
if (from.reg() == spilledReg_) {
// If the source is a register that has been spilled, make sure
// to load the source back into that register.
masm.mov(spillSlot(), spilledReg_);
spilledReg_ = InvalidReg;
}
masm.mov(from.reg(), toOperand(to));
} else if (to.isGeneralReg()) {
JS_ASSERT(from.isMemory() || from.isEffectiveAddress());
if (from.isMemory())
masm.mov(toOperand(from), to.reg());
else
masm.lea(toOperand(from), to.reg());
} else {
// Memory to memory gpr move.
Register reg = tempReg();
// Reload its previous value from the stack.
if (reg == from.base())
masm.mov(spillSlot(), from.base());
JS_ASSERT(from.isMemory() || from.isEffectiveAddress());
if (from.isMemory())
masm.mov(toOperand(from), reg);
else
masm.lea(toOperand(from), reg);
JS_ASSERT(to.base() != reg);
masm.mov(reg, toOperand(to));
}
}
void
MoveEmitterMIPS::emitDoubleMove(const MoveOperand &from, const MoveOperand &to)
{
// Ensure that we can use ScratchFloatReg in memory move.
MOZ_ASSERT_IF(from.isFloatReg(), from.floatReg() != ScratchFloatReg);
MOZ_ASSERT_IF(to.isFloatReg(), to.floatReg() != ScratchFloatReg);
if (from.isFloatReg()) {
if (to.isFloatReg()) {
masm.moveDouble(from.floatReg(), to.floatReg());
} else if (to.isGeneralReg()) {
// Used for passing double parameter in a2,a3 register pair.
// Two moves are added for one double parameter by
// MacroAssemblerMIPSCompat::passABIArg
if(to.reg() == a2)
masm.as_mfc1(a2, from.floatReg());
else if(to.reg() == a3)
masm.as_mfc1_Odd(a3, from.floatReg());
else
MOZ_ASSUME_UNREACHABLE("Invalid emitDoubleMove arguments.");
} else {
MOZ_ASSERT(to.isMemory());
masm.storeDouble(from.floatReg(), getAdjustedAddress(to));
}
} else if (to.isFloatReg()) {
MOZ_ASSERT(from.isMemory());
masm.loadDouble(getAdjustedAddress(from), to.floatReg());
} else if (to.isGeneralReg()) {
MOZ_ASSERT(from.isMemory());
// Used for passing double parameter in a2,a3 register pair.
// Two moves are added for one double parameter by
// MacroAssemblerMIPSCompat::passABIArg
if(to.reg() == a2)
masm.loadPtr(getAdjustedAddress(from), a2);
else if(to.reg() == a3)
masm.loadPtr(Address(from.base(), getAdjustedOffset(from) + sizeof(uint32_t)), a3);
else
MOZ_ASSUME_UNREACHABLE("Invalid emitDoubleMove arguments.");
} else {
MOZ_ASSERT(from.isMemory());
MOZ_ASSERT(to.isMemory());
masm.loadDouble(getAdjustedAddress(from), ScratchFloatReg);
masm.storeDouble(ScratchFloatReg, getAdjustedAddress(to));
}
}
void
MoveEmitterX86::emitGeneralMove(const MoveOperand& from, const MoveOperand& to)
{
if (from.isGeneralReg()) {
masm.mov(from.reg(), toOperand(to));
} else if (to.isGeneralReg()) {
MOZ_ASSERT(from.isMemoryOrEffectiveAddress());
if (from.isMemory())
masm.loadPtr(toAddress(from), to.reg());
else
masm.lea(toOperand(from), to.reg());
} else if (from.isMemory()) {
// Memory to memory gpr move.
if (hasScratchRegister()) {
Register reg = scratchRegister();
masm.loadPtr(toAddress(from), reg);
masm.mov(reg, toOperand(to));
} else {
// No scratch register available; bounce it off the stack.
masm.Push(toOperand(from));
masm.Pop(toPopOperand(to));
}
} else {
// Effective address to memory move.
MOZ_ASSERT(from.isEffectiveAddress());
if (hasScratchRegister()) {
Register reg = scratchRegister();
masm.lea(toOperand(from), reg);
masm.mov(reg, toOperand(to));
} else {
// This is tricky without a scratch reg. We can't do an lea. Bounce the
// base register off the stack, then add the offset in place. Note that
// this clobbers FLAGS!
masm.Push(from.base());
masm.Pop(toPopOperand(to));
masm.addPtr(Imm32(from.disp()), toOperand(to));
}
}
}
void
MoveEmitterX86::emitGeneralMove(const MoveOperand &from, const MoveOperand &to)
{
if (from.isGeneralReg()) {
masm.mov(from.reg(), toOperand(to));
} else if (to.isGeneralReg()) {
JS_ASSERT(from.isMemoryOrEffectiveAddress());
if (from.isMemory())
masm.loadPtr(toAddress(from), to.reg());
else
masm.lea(toOperand(from), to.reg());
} else if (from.isMemory()) {
// Memory to memory gpr move.
#ifdef JS_CODEGEN_X64
// x64 has a ScratchReg. Use it.
masm.loadPtr(toAddress(from), ScratchReg);
masm.mov(ScratchReg, toOperand(to));
#else
// No ScratchReg; bounce it off the stack.
masm.Push(toOperand(from));
masm.Pop(toPopOperand(to));
#endif
} else {
// Effective address to memory move.
JS_ASSERT(from.isEffectiveAddress());
#ifdef JS_CODEGEN_X64
// x64 has a ScratchReg. Use it.
masm.lea(toOperand(from), ScratchReg);
masm.mov(ScratchReg, toOperand(to));
#else
// This is tricky without a ScratchReg. We can't do an lea. Bounce the
// base register off the stack, then add the offset in place. Note that
// this clobbers FLAGS!
masm.Push(from.base());
masm.Pop(toPopOperand(to));
masm.addPtr(Imm32(from.disp()), toOperand(to));
#endif
}
}
Address
MoveEmitterMIPS::getAdjustedAddress(const MoveOperand &operand)
{
return Address(operand.base(), getAdjustedOffset(operand));
}
