Support for MIPS in architecture independent files....

src/mips/virtual-frame-mips.cc

+// Copyright 2006-2008 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+
+#include "v8.h"
+
+#include "codegen-inl.h"
+#include "register-allocator-inl.h"
+#include "scopes.h"
+
+namespace v8 {
+namespace internal {
+
+// -------------------------------------------------------------------------
+// VirtualFrame implementation.
+
+#define __ ACCESS_MASM(masm())
+
+
+// On entry to a function, the virtual frame already contains the
+// receiver and the parameters.  All initial frame elements are in
+// memory.
+VirtualFrame::VirtualFrame()
+    : elements_(parameter_count() + local_count() + kPreallocatedElements),
+      stack_pointer_(parameter_count()) {  // 0-based index of TOS.
+        UNIMPLEMENTED_();
+//  for (int i = 0; i <= stack_pointer_; i++) {
+//    elements_.Add(FrameElement::MemoryElement());
+//  }
+//  for (int i = 0; i < RegisterAllocator::kNumRegisters; i++) {
+//    register_locations_[i] = kIllegalIndex;
+//  }
+}
+
+
+void VirtualFrame::SyncElementBelowStackPointer(int index) {
+  UNREACHABLE();
+}
+
+
+void VirtualFrame::SyncElementByPushing(int index) {
+  UNREACHABLE();
+}
+
+
+void VirtualFrame::SyncRange(int begin, int end) {
+        UNIMPLEMENTED_();
+  // All elements are in memory on ARM (ie, synced).
+//#ifdef DEBUG
+//  for (int i = begin; i <= end; i++) {
+//    ASSERT(elements_[i].is_synced());
+//  }
+//#endif
+}
+
+
+void VirtualFrame::MergeTo(VirtualFrame* expected) {
+        UNIMPLEMENTED_();
+//  // ARM frames are currently always in memory.
+//  // TOCHECK: I presume it is the same on MIPS
+//  ASSERT(Equals(expected));
+}
+
+
+//void VirtualFrame::MergeMoveRegistersToMemory(VirtualFrame* expected) {
+//  UNREACHABLE();
+//}
+
+
+//void VirtualFrame::MergeMoveRegistersToRegisters(VirtualFrame* expected) {
+//  UNREACHABLE();
+//}
+
+
+//void VirtualFrame::MergeMoveMemoryToRegisters(VirtualFrame* expected) {
+//  UNREACHABLE();
+//}
+
+void VirtualFrame::Enter() {
+        UNIMPLEMENTED_();
+//  Comment cmnt(masm(), "[ Enter JS frame");
+//
+//#ifdef DEBUG
+//  // Verify that a1 contains a JS function.  The following code relies
+//  if (FLAG_debug_code) {
+//    Label map_check, done;
+//
+//    __ andi(t0, a1, Operand(kSmiTagMask));
+//    __ bcond(ne, &map_check, zero_reg, Operand(t0));
+//    __ stop("VirtualFrame::Enter - a1 is not a function (smi check).");
+//    __ bind(&map_check);
+//
+////    __ CompareObjectType(r1, r2, r2, JS_FUNCTION_TYPE);
+////    __ b(eq, &done);
+//    // TOCHECK : Register use.
+//    __ GetObjectType(a1, a2, a2);
+//    __ bcond(eq, &done, a2, Operand(JS_FUNCTION_TYPE));
+//    __ stop("VirtualFrame::Enter - a1 is not a function (map check).");
+//    __ bind(&done);
+//  }
+//#endif  // DEBUG
+//
+//  // We are about to push four values to the frame.
+//  Adjust(4);
+////  __ stm(db_w, sp, r1.bit() | cp.bit() | fp.bit() | lr.bit());
+////  __ multi_push(a1.bit() | cp.bit() | fp.bit() | ra.bit());
+//  // We don't use multi_push to optimize the code.
+//  __ addiu(sp,sp,-16);
+//  __ sw(ra, MemOperand(sp, 12));
+//  __ sw(fp, MemOperand(sp, 8));
+//  __ sw(cp, MemOperand(sp, 4));
+//  __ sw(a1, MemOperand(sp, 0));
+//
+//  // Adjust FP to point to saved FP.
+////  __ add(fp, sp, Operand(2 * kPointerSize));
+//  __ addiu(fp, sp, Operand(2 * kPointerSize));
+//
+////  cgen()->allocator()->Unuse(t9);
+//  cgen()->allocator()->Unuse(a1);
+//  cgen()->allocator()->Unuse(ra);
+}
+
+
+void VirtualFrame::Exit() {
+        UNIMPLEMENTED_();
+//  Comment cmnt(masm(), "[ Exit JS frame");
+//  // Record the location of the JS exit code for patching when setting
+//  // break point.
+//  __ RecordJSReturn();
+//
+//  // Drop the execution stack down to the frame pointer and restore the caller
+//  // frame pointer and return address.
+//  __ mov(sp, fp);
+//
+//  // Cf end of Enter() function.
+////  __ ldm(ia_w, sp, fp.bit() | lr.bit());
+//  __ lw(fp, MemOperand(sp, 0));
+//  __ lw(ra, MemOperand(sp, 4));
+//  __ addiu(sp,sp,8); // Restore sp at its position before the register save area.
+}
+
+
+void VirtualFrame::AllocateStackSlots() {
+        UNIMPLEMENTED_();
+//  int count = local_count();
+//  if (count > 0) {
+//    Comment cmnt(masm(), "[ Allocate space for locals");
+//    Adjust(count);
+//      // Initialize stack slots with 'undefined' value.
+//    __ LoadRoot(ip, Heap::kUndefinedValueRootIndex);
+//  }
+////  if (FLAG_check_stack) {
+//////    __ LoadRoot(r2, Heap::kStackLimitRootIndex);
+////    __ LoadRoot(a2, Heap::kStackLimitRootIndex);
+////  }
+//  __ addiu(sp, sp, -count*kPointerSize);
+//  for (int i = 0; i < count; i++) {
+////    __ push(ip);
+//    __ sw(ip, MemOperand(sp, (count-i-1)*kPointerSize));
+//  }
+////  if (FLAG_check_stack) {
+////    // TODO : implement this. FLAG_check_stack "if"
+////    // ARM comment
+////    // Put the lr setup instruction in the delay slot.  The kInstrSize is added
+////    // to the implicit 8 byte offset that always applies to operations with pc
+////    // and gives a return address 12 bytes down.
+////    masm()->add(lr, pc, Operand(Assembler::kInstrSize));
+////    masm()->cmp(sp, Operand(r2));
+////    StackCheckStub stub;
+////    // Call the stub if lower.
+////    masm()->mov(pc,
+////                Operand(reinterpret_cast<intptr_t>(stub.GetCode().location()),
+////                        RelocInfo::CODE_TARGET),
+////                LeaveCC,
+////                lo);
+////  }
+}
+
+
+void VirtualFrame::SaveContextRegister() {
+  UNIMPLEMENTED();
+}
+
+
+void VirtualFrame::RestoreContextRegister() {
+  UNIMPLEMENTED();
+}
+
+
+void VirtualFrame::PushReceiverSlotAddress() {
+  UNIMPLEMENTED();
+}
+
+
+int VirtualFrame::InvalidateFrameSlotAt(int index) {
+  return kIllegalIndex;
+}
+
+
+void VirtualFrame::TakeFrameSlotAt(int index) {
+  UNIMPLEMENTED();
+}
+
+
+void VirtualFrame::StoreToFrameSlotAt(int index) {
+  UNIMPLEMENTED();
+}
+
+
+void VirtualFrame::PushTryHandler(HandlerType type) {
+  UNIMPLEMENTED_();
+//  // Grow the expression stack by handler size less one (the return
+//  // address in lr is already counted by a call instruction).
+//  Adjust(kHandlerSize - 1);
+//  __ PushTryHandler(IN_JAVASCRIPT, type);
+}
+
+
+void VirtualFrame::RawCallStub(CodeStub* stub) {
+  UNIMPLEMENTED_();
+//  ASSERT(cgen()->HasValidEntryRegisters());
+//  __ CallStub(stub);
+}
+
+
+void VirtualFrame::CallStub(CodeStub* stub, Result* arg) {
+  UNIMPLEMENTED_();
+//  PrepareForCall(0, 0);
+//  arg->Unuse();
+//  RawCallStub(stub);
+}
+
+
+void VirtualFrame::CallStub(CodeStub* stub, Result* arg0, Result* arg1) {
+  UNIMPLEMENTED_();
+//  PrepareForCall(0, 0);
+//  arg0->Unuse();
+//  arg1->Unuse();
+//  RawCallStub(stub);
+}
+
+
+void VirtualFrame::CallRuntime(Runtime::Function* f, int arg_count) {
+  UNIMPLEMENTED_();
+//  PrepareForCall(arg_count, arg_count);
+//  ASSERT(cgen()->HasValidEntryRegisters());
+//  __ CallRuntime(f, arg_count);
+}
+
+
+void VirtualFrame::CallRuntime(Runtime::FunctionId id, int arg_count) {
+  UNIMPLEMENTED_();
+//  PrepareForCall(arg_count, arg_count);
+//  ASSERT(cgen()->HasValidEntryRegisters());
+//  __ CallRuntime(id, arg_count);
+}
+
+
+void VirtualFrame::CallAlignedRuntime(Runtime::Function* f, int arg_count) {
+  UNIMPLEMENTED();
+//  PrepareForCall(arg_count, arg_count);
+//  ASSERT(cgen()->HasValidEntryRegisters());
+//  __ CallRuntime(f, arg_count);
+}
+
+
+void VirtualFrame::CallAlignedRuntime(Runtime::FunctionId id, int arg_count) {
+  UNIMPLEMENTED();
+//  PrepareForCall(arg_count, arg_count);
+//  ASSERT(cgen()->HasValidEntryRegisters());
+//  __ CallRuntime(id, arg_count);
+}
+
+
+void VirtualFrame::InvokeBuiltin(Builtins::JavaScript id,
+                                 InvokeJSFlags flags,
+                                 Result* arg_count_register,
+                                 int arg_count) {
+  UNIMPLEMENTED_();
+//  ASSERT(arg_count_register->reg().is(a0));
+//  PrepareForCall(arg_count, arg_count);
+//  arg_count_register->Unuse();
+//  __ InvokeBuiltin(id, flags);
+}
+
+
+void VirtualFrame::RawCallCodeObject(Handle<Code> code,
+                                       RelocInfo::Mode rmode) {
+  UNIMPLEMENTED_();
+//  ASSERT(cgen()->HasValidEntryRegisters());
+//  // We don't align here because it may cause the arguments to be unaligned with
+//  // sp when entering the function.
+//  __ Call(code, rmode);             // Call the code
+}
+
+
+void VirtualFrame::CallCodeObject(Handle<Code> code,
+                                  RelocInfo::Mode rmode,
+                                  int dropped_args) {
+  UNIMPLEMENTED_();
+//  int spilled_args = 0;
+//  switch (code->kind()) {
+//    case Code::CALL_IC:
+//      spilled_args = dropped_args + 1;
+//      break;
+//    case Code::FUNCTION:
+//      spilled_args = dropped_args + 1;
+//      break;
+//    case Code::KEYED_LOAD_IC:
+//      ASSERT(dropped_args == 0);
+//      spilled_args = 2;
+//      break;
+//    default:
+//      // The other types of code objects are called with values
+//      // in specific registers, and are handled in functions with
+//      // a different signature.
+//      UNREACHABLE();
+//      break;
+//  }
+//  PrepareForCall(spilled_args, dropped_args);
+//  RawCallCodeObject(code, rmode);
+//  // Do NOT add a nop. Some function use the branch delay slot (eg VisitCall)
+}
+
+
+void VirtualFrame::CallCodeObject(Handle<Code> code,
+                                  RelocInfo::Mode rmode,
+                                  Result* arg,
+                                  int dropped_args) {
+  UNIMPLEMENTED_();
+//  int spilled_args = 0;
+//  switch (code->kind()) {
+//    case Code::LOAD_IC:
+//      ASSERT(arg->reg().is(a2));
+//      ASSERT(dropped_args == 0);
+//      spilled_args = 1;
+//      break;
+//    case Code::KEYED_STORE_IC:
+//      ASSERT(arg->reg().is(a0));
+//      ASSERT(dropped_args == 0);
+//      spilled_args = 2;
+//      break;
+//    default:
+//      // No other types of code objects are called with values
+//      // in exactly one register.
+//      UNREACHABLE();
+//      break;
+//  }
+////  PrepareForCall(spilled_args, dropped_args);
+//  arg->Unuse();
+//  RawCallCodeObject(code, rmode);
+//  // Do NOT add a nop. Some function use the branch delay slot (eg VisitCall)
+}
+
+
+void VirtualFrame::CallCodeObject(Handle<Code> code,
+                                  RelocInfo::Mode rmode,
+                                  Result* arg0,
+                                  Result* arg1,
+                                  int dropped_args,
+                                  bool set_auto_args_slots) {
+  UNIMPLEMENTED_();
+//  int spilled_args = 1;
+//  switch (code->kind()) {
+//    case Code::STORE_IC:
+////      ASSERT(arg0->reg().is(r0));
+////      ASSERT(arg1->reg().is(r2));
+//      ASSERT(arg0->reg().is(a0));
+//      ASSERT(arg1->reg().is(a2));
+//      ASSERT(dropped_args == 0);
+//      spilled_args = 1;
+//      break;
+//    case Code::BUILTIN:
+//      ASSERT(*code == Builtins::builtin(Builtins::JSConstructCall));
+////      ASSERT(arg0->reg().is(r0));
+////      ASSERT(arg1->reg().is(r1));
+//      ASSERT(arg0->reg().is(a0));
+//      ASSERT(arg1->reg().is(a1));
+//      spilled_args = dropped_args + 1;
+//      break;
+//    default:
+//      // No other types of code objects are called with values
+//      // in exactly two registers.
+//      UNREACHABLE();
+//      break;
+//  }
+//  PrepareForCall(spilled_args, dropped_args);
+//  arg0->Unuse();
+//  arg1->Unuse();
+//  RawCallCodeObject(code, rmode);
+//  if(set_auto_args_slots && !(code->kind() == Code::BUILTIN)) {
+////    __ addiu(sp, sp, -StandardFrameConstants::kRArgsSlotsSize);
+//  }
+}
+
+
+void VirtualFrame::Drop(int count) {
+  UNIMPLEMENTED_();
+//  ASSERT(count >= 0);
+//  ASSERT(height() >= count);
+//  int num_virtual_elements = (element_count() - 1) - stack_pointer_;
+//
+//  // Emit code to lower the stack pointer if necessary.
+//  if (num_virtual_elements < count) {
+//    int num_dropped = count - num_virtual_elements;
+//    stack_pointer_ -= num_dropped;
+//    __ addiu(sp, sp, Operand(num_dropped * kPointerSize));
+//  }
+//
+//  // Discard elements from the virtual frame and free any registers.
+//  for (int i = 0; i < count; i++) {
+//    FrameElement dropped = elements_.RemoveLast();
+//    if (dropped.is_register()) {
+//      Unuse(dropped.reg());
+//    }
+//  }
+}
+
+
+void VirtualFrame::DropFromVFrameOnly(int count) {
+  UNIMPLEMENTED_();
+//  ASSERT(count >= 0);
+//  ASSERT(height() >= count);
+//  int num_virtual_elements = (element_count() - 1) - stack_pointer_;
+//
+//  // Emit code to lower the stack pointer if necessary.
+//  if (num_virtual_elements < count) {
+//    int num_dropped = count - num_virtual_elements;
+//    stack_pointer_ -= num_dropped;
+//  }
+//
+//  // Discard elements from the virtual frame and free any registers.
+//  for (int i = 0; i < count; i++) {
+//    FrameElement dropped = elements_.RemoveLast();
+//    if (dropped.is_register()) {
+//      Unuse(dropped.reg());
+//    }
+//  }
+}
+
+
+Result VirtualFrame::Pop() {
+  return Result();
+}
+
+
+void VirtualFrame::EmitPop(Register reg) {
+  UNIMPLEMENTED_();
+//  ASSERT(stack_pointer_ == element_count() - 1);
+//  stack_pointer_--;
+//  elements_.RemoveLast();
+//  __ pop(reg);
+}
+
+void VirtualFrame::EmitMultiPop(RegList regs) {
+  UNIMPLEMENTED_();
+//  ASSERT(stack_pointer_ == element_count() - 1);
+//  for (int16_t i = RegisterAllocatorConstants::kNumRegisters; --i>=0;) {
+//    if((regs & (1<<i)) != 0 ) {
+//  stack_pointer_--;
+//  elements_.RemoveLast();
+//    }
+//  }
+//  __ multi_pop(regs);
+//}
+//void VirtualFrame::EmitMultiPopReversed(RegList regs) {
+//  ASSERT(stack_pointer_ == element_count() - 1);
+//  for (int16_t i = RegisterAllocatorConstants::kNumRegisters; --i>=0;) {
+//    if((regs & (1<<i)) != 0 ) {
+//  stack_pointer_--;
+//  elements_.RemoveLast();
+//    }
+//  }
+//  __ multi_pop_reversed(regs);
+}
+
+
+void VirtualFrame::EmitPush(Register reg) {
+  UNIMPLEMENTED_();
+//  ASSERT(stack_pointer_ == element_count() - 1);
+//  elements_.Add(FrameElement::MemoryElement());
+//  stack_pointer_++;
+//  __ push(reg);
+}
+
+void VirtualFrame::EmitMultiPush(RegList regs) {
+  UNIMPLEMENTED_();
+//  ASSERT(stack_pointer_ == element_count() - 1);
+//  for (int16_t i = 0; i< RegisterAllocatorConstants::kNumRegisters; i++) {
+//    if((regs & (1<<i)) != 0 ) {
+//      elements_.Add(FrameElement::MemoryElement());
+//      stack_pointer_++;
+//    }
+//  }
+//  __ multi_push(regs);
+//}
+//void VirtualFrame::EmitMultiPushReversed(RegList regs) {
+//  ASSERT(stack_pointer_ == element_count() - 1);
+//  for (int16_t i = 0; i< RegisterAllocatorConstants::kNumRegisters; i++) {
+//    if((regs & (1<<i)) != 0 ) {
+//      elements_.Add(FrameElement::MemoryElement());
+//      stack_pointer_++;
+//    }
+//  }
+//  __ multi_push_reversed(regs);
+}
+
+void VirtualFrame::EmitArgumentSlots(RegList reglist) {
+  UNIMPLEMENTED_();
+//  ASSERT(stack_pointer_ == element_count() - 1);
+//  ASSERT(is_uint4(reglist));
+//  __ addiu(sp, sp, 4*kPointerSize);
+//  for (int i=0; i<4; i++) {
+//    elements_.Add(FrameElement::MemoryElement());
+//    stack_pointer_++;
+//    if(reglist & 1<<i) { __ sw(RegisterAllocator::ToRegister(i+4), MemOperand(sp, 4-i));}
+//  }
+}
+
+#undef __
+
+} }  // namespace v8::internal