[Interpreter] Implements calls through CallICStub in the interpreter.

src/mips64/code-stubs-mips64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_MIPS64
 
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
 #include "src/ic/handler-compiler.h"
@@ skipping 2206 matching lines @@
                                     index_,
                                     result_,
                                     &call_runtime_);
 
   __ SmiTag(result_);
   __ bind(&exit_);
 }
 
 
 void CallICStub::HandleArrayCase(MacroAssembler* masm, Label* miss) {
+  // a0 - number of arguments - if argc_in_register() is true.
   // a1 - function
   // a3 - slot id
   // a2 - vector
   // a4 - allocation site (loaded from vector[slot])
   __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, at);
   __ Branch(miss, ne, a1, Operand(at));
 
-  __ li(a0, Operand(arg_count()));
-
   // Increment the call count for monomorphic function calls.
-  __ dsrl(t0, a3, 32 - kPointerSizeLog2);
-  __ Daddu(a3, a2, Operand(t0));
-  __ ld(t0, FieldMemOperand(a3, FixedArray::kHeaderSize + kPointerSize));
-  __ Daddu(t0, t0, Operand(Smi::FromInt(CallICNexus::kCallCountIncrement)));
-  __ sd(t0, FieldMemOperand(a3, FixedArray::kHeaderSize + kPointerSize));
+  __ dsrl(a5, a3, kSmiShiftSize + 1 - kPointerSizeLog2);
+  __ Daddu(a3, a2, Operand(a5));
+  __ ld(a5, FieldMemOperand(a3, FixedArray::kHeaderSize + kPointerSize));
+  __ Daddu(a5, a5, Operand(Smi::FromInt(CallICNexus::kCallCountIncrement)));
+  __ sd(a5, FieldMemOperand(a3, FixedArray::kHeaderSize + kPointerSize));
 
   __ mov(a2, a4);
   __ mov(a3, a1);
-  ArrayConstructorStub stub(masm->isolate(), arg_count());
-  __ TailCallStub(&stub);
+  if (argc_in_register()) {
+    // Pass a default ArgumentCountKey::Any since the argc is only available
+    // in a0. We do not have the actual count here.
+    ArrayConstructorStub stub(masm->isolate());
+    __ TailCallStub(&stub);
+  } else {
+    // arg_count() is expected in a0 if the arg_count() >= 2
+    // (ArgumentCountKey::MORE_THAN_ONE).
+    ArrayConstructorStub stub(masm->isolate(), arg_count());
+    __ TailCallStub(&stub);
+  }
 }
 
 
 void CallICStub::Generate(MacroAssembler* masm) {
+  // a0 - number of arguments - if argc_in_register() is true.
   // a1 - function
   // a3 - slot id (Smi)
   // a2 - vector
   Label extra_checks_or_miss, call, call_function;
-  int argc = arg_count();
-  ParameterCount actual(argc);
+  if (!argc_in_register()) {
+    int argc = arg_count();
+    __ li(a0, argc);
+  }
 
-  // The checks. First, does r1 match the recorded monomorphic target?
-  __ dsrl(a4, a3, 32 - kPointerSizeLog2);
+  // The checks. First, does a1 match the recorded monomorphic target?
+  __ dsrl(a4, a3, kSmiShiftSize + 1 - kPointerSizeLog2);
   __ Daddu(a4, a2, Operand(a4));
   __ ld(a4, FieldMemOperand(a4, FixedArray::kHeaderSize));
 
   // We don't know that we have a weak cell. We might have a private symbol
   // or an AllocationSite, but the memory is safe to examine.
   // AllocationSite::kTransitionInfoOffset - contains a Smi or pointer to
   // FixedArray.
   // WeakCell::kValueOffset - contains a JSFunction or Smi(0)
   // Symbol::kHashFieldSlot - if the low bit is 1, then the hash is not
   // computed, meaning that it can't appear to be a pointer. If the low bit is
@@ skipping 14 matching lines @@
   // Increment the call count for monomorphic function calls.
   __ dsrl(t0, a3, 32 - kPointerSizeLog2);
   __ Daddu(a3, a2, Operand(t0));
   __ ld(t0, FieldMemOperand(a3, FixedArray::kHeaderSize + kPointerSize));
   __ Daddu(t0, t0, Operand(Smi::FromInt(CallICNexus::kCallCountIncrement)));
   __ sd(t0, FieldMemOperand(a3, FixedArray::kHeaderSize + kPointerSize));
 
   __ bind(&call_function);
   __ Jump(masm->isolate()->builtins()->CallFunction(convert_mode(),
                                                     tail_call_mode()),
-          RelocInfo::CODE_TARGET, al, zero_reg, Operand(zero_reg),
-          USE_DELAY_SLOT);
-  __ li(a0, Operand(argc));  // In delay slot.
+          RelocInfo::CODE_TARGET, al, zero_reg, Operand(zero_reg));
 
   __ bind(&extra_checks_or_miss);
   Label uninitialized, miss, not_allocation_site;
 
   __ LoadRoot(at, Heap::kmegamorphic_symbolRootIndex);
   __ Branch(&call, eq, a4, Operand(at));
 
   // Verify that a4 contains an AllocationSite
   __ ld(a5, FieldMemOperand(a4, HeapObject::kMapOffset));
   __ LoadRoot(at, Heap::kAllocationSiteMapRootIndex);
@@ skipping 17 matching lines @@
   __ AssertNotSmi(a4);
   __ GetObjectType(a4, a5, a5);
   __ Branch(&miss, ne, a5, Operand(JS_FUNCTION_TYPE));
   __ dsrl(a4, a3, 32 - kPointerSizeLog2);
   __ Daddu(a4, a2, Operand(a4));
   __ LoadRoot(at, Heap::kmegamorphic_symbolRootIndex);
   __ sd(at, FieldMemOperand(a4, FixedArray::kHeaderSize));
 
   __ bind(&call);
   __ Jump(masm->isolate()->builtins()->Call(convert_mode(), tail_call_mode()),
-          RelocInfo::CODE_TARGET, al, zero_reg, Operand(zero_reg),
-          USE_DELAY_SLOT);
-  __ li(a0, Operand(argc));  // In delay slot.
+          RelocInfo::CODE_TARGET, al, zero_reg, Operand(zero_reg));
 
   __ bind(&uninitialized);
 
   // We are going monomorphic, provided we actually have a JSFunction.
   __ JumpIfSmi(a1, &miss);
 
   // Goto miss case if we do not have a function.
   __ GetObjectType(a1, a4, a4);
   __ Branch(&miss, ne, a4, Operand(JS_FUNCTION_TYPE));
 
@@ skipping 14 matching lines @@
   __ li(t0, Operand(Smi::FromInt(CallICNexus::kCallCountIncrement)));
   __ sd(t0, FieldMemOperand(at, FixedArray::kHeaderSize + kPointerSize));
 
   // Store the function. Use a stub since we need a frame for allocation.
   // a2 - vector
   // a3 - slot
   // a1 - function
   {
     FrameScope scope(masm, StackFrame::INTERNAL);
     CreateWeakCellStub create_stub(masm->isolate());
-    __ Push(a1);
+    __ SmiTag(a0);
+    __ Push(a0, a1);
     __ CallStub(&create_stub);
-    __ Pop(a1);
+    __ Pop(a0, a1);
+    __ SmiUntag(a0);
   }
 
   __ Branch(&call_function);
 
   // We are here because tracing is on or we encountered a MISS case we can't
   // handle here.
   __ bind(&miss);
   GenerateMiss(masm);
 
   __ Branch(&call);
 }
 
 
 void CallICStub::GenerateMiss(MacroAssembler* masm) {
   FrameScope scope(masm, StackFrame::INTERNAL);
 
-  // Push the receiver and the function and feedback info.
-  __ Push(a1, a2, a3);
+  __ SmiTag(a0);
+  // Push number of arguments, receiver, function and feedback info.
+  __ Push(a0, a1, a2, a3);
 
   // Call the entry.
   __ CallRuntime(Runtime::kCallIC_Miss);
 
   // Move result to a1 and exit the internal frame.
   __ mov(a1, v0);
+
+  // Restore a0.
+  __ Pop(a0);
+  __ SmiUntag(a0);
 }
 
 
 void StringCharCodeAtGenerator::GenerateSlow(
     MacroAssembler* masm, EmbedMode embed_mode,
     const RuntimeCallHelper& call_helper) {
   __ Abort(kUnexpectedFallthroughToCharCodeAtSlowCase);
 
   // Index is not a smi.
   __ bind(&index_not_smi_);
@@ skipping 3407 matching lines @@
                            return_value_operand, NULL);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS64