Version 3.8.6

src/arm/code-stubs-arm.cc

 // Copyright 2011 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
@@ skipping 138 matching lines @@
   __ AllocateInNewSpace(FixedArray::SizeFor(length),
                         r0,
                         r1,
                         r2,
                         &gc,
                         TAG_OBJECT);
 
   // Load the function from the stack.
   __ ldr(r3, MemOperand(sp, 0));
 
-  // Setup the object header.
+  // Set up the object header.
   __ LoadRoot(r2, Heap::kFunctionContextMapRootIndex);
   __ str(r2, FieldMemOperand(r0, HeapObject::kMapOffset));
   __ mov(r2, Operand(Smi::FromInt(length)));
   __ str(r2, FieldMemOperand(r0, FixedArray::kLengthOffset));
 
-  // Setup the fixed slots.
+  // Set up the fixed slots.
   __ mov(r1, Operand(Smi::FromInt(0)));
   __ str(r3, MemOperand(r0, Context::SlotOffset(Context::CLOSURE_INDEX)));
   __ str(cp, MemOperand(r0, Context::SlotOffset(Context::PREVIOUS_INDEX)));
   __ str(r1, MemOperand(r0, Context::SlotOffset(Context::EXTENSION_INDEX)));
 
   // Copy the global object from the previous context.
   __ ldr(r1, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_INDEX)));
   __ str(r1, MemOperand(r0, Context::SlotOffset(Context::GLOBAL_INDEX)));
 
   // Initialize the rest of the slots to undefined.
@@ skipping 24 matching lines @@
   int length = slots_ + Context::MIN_CONTEXT_SLOTS;
   __ AllocateInNewSpace(FixedArray::SizeFor(length),
                         r0, r1, r2, &gc, TAG_OBJECT);
 
   // Load the function from the stack.
   __ ldr(r3, MemOperand(sp, 0));
 
   // Load the serialized scope info from the stack.
   __ ldr(r1, MemOperand(sp, 1 * kPointerSize));
 
-  // Setup the object header.
+  // Set up the object header.
   __ LoadRoot(r2, Heap::kBlockContextMapRootIndex);
   __ str(r2, FieldMemOperand(r0, HeapObject::kMapOffset));
   __ mov(r2, Operand(Smi::FromInt(length)));
   __ str(r2, FieldMemOperand(r0, FixedArray::kLengthOffset));
 
   // If this block context is nested in the global context we get a smi
   // sentinel instead of a function. The block context should get the
   // canonical empty function of the global context as its closure which
   // we still have to look up.
   Label after_sentinel;
   __ JumpIfNotSmi(r3, &after_sentinel);
   if (FLAG_debug_code) {
     const char* message = "Expected 0 as a Smi sentinel";
     __ cmp(r3, Operand::Zero());
     __ Assert(eq, message);
   }
   __ ldr(r3, GlobalObjectOperand());
   __ ldr(r3, FieldMemOperand(r3, GlobalObject::kGlobalContextOffset));
   __ ldr(r3, ContextOperand(r3, Context::CLOSURE_INDEX));
   __ bind(&after_sentinel);
 
-  // Setup the fixed slots.
+  // Set up the fixed slots.
   __ str(r3, ContextOperand(r0, Context::CLOSURE_INDEX));
   __ str(cp, ContextOperand(r0, Context::PREVIOUS_INDEX));
   __ str(r1, ContextOperand(r0, Context::EXTENSION_INDEX));
 
   // Copy the global object from the previous context.
   __ ldr(r1, ContextOperand(cp, Context::GLOBAL_INDEX));
   __ str(r1, ContextOperand(r0, Context::GLOBAL_INDEX));
 
   // Initialize the rest of the slots to the hole value.
   __ LoadRoot(r1, Heap::kTheHoleValueRootIndex);
@@ skipping 467 matching lines @@
     __ cmp(int_scratch, Operand::Zero());
     __ mov(dst2, int_scratch);
     __ mov(dst1, int_scratch);
     __ b(eq, &done);
 
     // Preload the sign of the value.
     __ and_(dst2, int_scratch, Operand(HeapNumber::kSignMask), SetCC);
     // Get the absolute value of the object (as an unsigned integer).
     __ rsb(int_scratch, int_scratch, Operand::Zero(), SetCC, mi);
 
-    // Get mantisssa[51:20].
+    // Get mantissa[51:20].
 
     // Get the position of the first set bit.
     __ CountLeadingZeros(dst1, int_scratch, scratch2);
     __ rsb(dst1, dst1, Operand(31));
 
     // Set the exponent.
     __ add(scratch2, dst1, Operand(HeapNumber::kExponentBias));
     __ Bfi(dst2, scratch2, scratch2,
         HeapNumber::kExponentShift, HeapNumber::kExponentBits);
 
@@ skipping 213 matching lines @@
   __ cmp(tmp, Operand(30));
   __ b(gt, not_int32);
   // - Bits [21:0] in the mantissa are not null.
   __ tst(src2, Operand(0x3fffff));
   __ b(ne, not_int32);
 
   // Otherwise the exponent needs to be big enough to shift left all the
   // non zero bits left. So we need the (30 - exponent) last bits of the
   // 31 higher bits of the mantissa to be null.
   // Because bits [21:0] are null, we can check instead that the
-  // (32 - exponent) last bits of the 32 higher bits of the mantisssa are null.
+  // (32 - exponent) last bits of the 32 higher bits of the mantissa are null.
 
   // Get the 32 higher bits of the mantissa in dst.
   __ Ubfx(dst,
           src2,
           HeapNumber::kMantissaBitsInTopWord,
           32 - HeapNumber::kMantissaBitsInTopWord);
   __ orr(dst,
          dst,
          Operand(src1, LSL, HeapNumber::kNonMantissaBitsInTopWord));
 
@@ skipping 2870 matching lines @@
   // builtin once.
 
   // Compute the argv pointer in a callee-saved register.
   __ add(r6, sp, Operand(r0, LSL, kPointerSizeLog2));
   __ sub(r6, r6, Operand(kPointerSize));
 
   // Enter the exit frame that transitions from JavaScript to C++.
   FrameScope scope(masm, StackFrame::MANUAL);
   __ EnterExitFrame(save_doubles_);
 
-  // Setup argc and the builtin function in callee-saved registers.
+  // Set up argc and the builtin function in callee-saved registers.
   __ mov(r4, Operand(r0));
   __ mov(r5, Operand(r1));
 
   // r4: number of arguments (C callee-saved)
   // r5: pointer to builtin function (C callee-saved)
   // r6: pointer to first argument (C callee-saved)
 
   Label throw_normal_exception;
   Label throw_termination_exception;
   Label throw_out_of_memory_exception;
@@ skipping 56 matching lines @@
     // Set up the reserved register for 0.0.
     __ vmov(kDoubleRegZero, 0.0);
   }
 
   // Get address of argv, see stm above.
   // r0: code entry
   // r1: function
   // r2: receiver
   // r3: argc
 
-  // Setup argv in r4.
+  // Set up argv in r4.
   int offset_to_argv = (kNumCalleeSaved + 1) * kPointerSize;
   if (CpuFeatures::IsSupported(VFP3)) {
     offset_to_argv += kNumDoubleCalleeSaved * kDoubleSize;
   }
   __ ldr(r4, MemOperand(sp, offset_to_argv));
 
   // Push a frame with special values setup to mark it as an entry frame.
   // r0: code entry
   // r1: function
   // r2: receiver
   // r3: argc
   // r4: argv
   Isolate* isolate = masm->isolate();
   __ mov(r8, Operand(-1));  // Push a bad frame pointer to fail if it is used.
   int marker = is_construct ? StackFrame::ENTRY_CONSTRUCT : StackFrame::ENTRY;
   __ mov(r7, Operand(Smi::FromInt(marker)));
   __ mov(r6, Operand(Smi::FromInt(marker)));
   __ mov(r5,
          Operand(ExternalReference(Isolate::kCEntryFPAddress, isolate)));
   __ ldr(r5, MemOperand(r5));
   __ Push(r8, r7, r6, r5);
 
-  // Setup frame pointer for the frame to be pushed.
+  // Set up frame pointer for the frame to be pushed.
   __ add(fp, sp, Operand(-EntryFrameConstants::kCallerFPOffset));
 
   // If this is the outermost JS call, set js_entry_sp value.
   Label non_outermost_js;
   ExternalReference js_entry_sp(Isolate::kJSEntrySPAddress, isolate);
   __ mov(r5, Operand(ExternalReference(js_entry_sp)));
   __ ldr(r6, MemOperand(r5));
   __ cmp(r6, Operand::Zero());
   __ b(ne, &non_outermost_js);
   __ str(fp, MemOperand(r5));
@@ skipping 118 matching lines @@
   ASSERT(!ReturnTrueFalseObject() || HasCallSiteInlineCheck());
 
   // Fixed register usage throughout the stub:
   const Register object = r0;  // Object (lhs).
   Register map = r3;  // Map of the object.
   const Register function = r1;  // Function (rhs).
   const Register prototype = r4;  // Prototype of the function.
   const Register inline_site = r9;
   const Register scratch = r2;
 
-  const int32_t kDeltaToLoadBoolResult = 3 * kPointerSize;
+  const int32_t kDeltaToLoadBoolResult = 4 * kPointerSize;
 
   Label slow, loop, is_instance, is_not_instance, not_js_object;
 
   if (!HasArgsInRegisters()) {
     __ ldr(object, MemOperand(sp, 1 * kPointerSize));
     __ ldr(function, MemOperand(sp, 0));
   }
 
   // Check that the left hand is a JS object and load map.
   __ JumpIfSmi(object, &not_js_object);
@@ skipping 30 matching lines @@
   } else {
     ASSERT(HasArgsInRegisters());
     // Patch the (relocated) inlined map check.
 
     // The offset was stored in r4 safepoint slot.
     // (See LCodeGen::DoDeferredLInstanceOfKnownGlobal)
     __ LoadFromSafepointRegisterSlot(scratch, r4);
     __ sub(inline_site, lr, scratch);
     // Get the map location in scratch and patch it.
     __ GetRelocatedValueLocation(inline_site, scratch);
-    __ str(map, MemOperand(scratch));
+    __ ldr(scratch, MemOperand(scratch));
+    __ str(map, FieldMemOperand(scratch, JSGlobalPropertyCell::kValueOffset));
   }
 
   // Register mapping: r3 is object map and r4 is function prototype.
   // Get prototype of object into r2.
   __ ldr(scratch, FieldMemOperand(map, Map::kPrototypeOffset));
 
   // We don't need map any more. Use it as a scratch register.
   Register scratch2 = map;
   map = no_reg;
 
@@ skipping 248 matching lines @@
   // r0 = address of new object (tagged)
   // r1 = mapped parameter count (tagged)
   // r2 = argument count (tagged)
   // r4 = address of boilerplate object (tagged)
   // Copy the JS object part.
   for (int i = 0; i < JSObject::kHeaderSize; i += kPointerSize) {
     __ ldr(r3, FieldMemOperand(r4, i));
     __ str(r3, FieldMemOperand(r0, i));
   }
 
-  // Setup the callee in-object property.
+  // Set up the callee in-object property.
   STATIC_ASSERT(Heap::kArgumentsCalleeIndex == 1);
   __ ldr(r3, MemOperand(sp, 2 * kPointerSize));
   const int kCalleeOffset = JSObject::kHeaderSize +
       Heap::kArgumentsCalleeIndex * kPointerSize;
   __ str(r3, FieldMemOperand(r0, kCalleeOffset));
 
   // Use the length (smi tagged) and set that as an in-object property too.
   STATIC_ASSERT(Heap::kArgumentsLengthIndex == 0);
   const int kLengthOffset = JSObject::kHeaderSize +
       Heap::kArgumentsLengthIndex * kPointerSize;
   __ str(r2, FieldMemOperand(r0, kLengthOffset));
 
-  // Setup the elements pointer in the allocated arguments object.
+  // Set up the elements pointer in the allocated arguments object.
   // If we allocated a parameter map, r4 will point there, otherwise
   // it will point to the backing store.
   __ add(r4, r0, Operand(Heap::kArgumentsObjectSize));
   __ str(r4, FieldMemOperand(r0, JSObject::kElementsOffset));
 
   // r0 = address of new object (tagged)
   // r1 = mapped parameter count (tagged)
   // r2 = argument count (tagged)
   // r4 = address of parameter map or backing store (tagged)
   // Initialize parameter map. If there are no mapped arguments, we're done.
@@ skipping 74 matching lines @@
 
   __ bind(&arguments_test);
   __ cmp(r9, Operand(r2));
   __ b(lt, &arguments_loop);
 
   // Return and remove the on-stack parameters.
   __ add(sp, sp, Operand(3 * kPointerSize));
   __ Ret();
 
   // Do the runtime call to allocate the arguments object.
-  // r2 = argument count (taggged)
+  // r2 = argument count (tagged)
   __ bind(&runtime);
   __ str(r2, MemOperand(sp, 0 * kPointerSize));  // Patch argument count.
   __ TailCallRuntime(Runtime::kNewArgumentsFast, 3, 1);
 }
 
 
 void ArgumentsAccessStub::GenerateNewStrict(MacroAssembler* masm) {
   // sp[0] : number of parameters
   // sp[4] : receiver displacement
   // sp[8] : function
@@ skipping 52 matching lines @@
       Heap::kArgumentsLengthIndex * kPointerSize));
 
   // If there are no actual arguments, we're done.
   Label done;
   __ cmp(r1, Operand(0, RelocInfo::NONE));
   __ b(eq, &done);
 
   // Get the parameters pointer from the stack.
   __ ldr(r2, MemOperand(sp, 1 * kPointerSize));
 
-  // Setup the elements pointer in the allocated arguments object and
+  // Set up the elements pointer in the allocated arguments object and
   // initialize the header in the elements fixed array.
   __ add(r4, r0, Operand(Heap::kArgumentsObjectSizeStrict));
   __ str(r4, FieldMemOperand(r0, JSObject::kElementsOffset));
   __ LoadRoot(r3, Heap::kFixedArrayMapRootIndex);
   __ str(r3, FieldMemOperand(r4, FixedArray::kMapOffset));
   __ str(r1, FieldMemOperand(r4, FixedArray::kLengthOffset));
   // Untag the length for the loop.
   __ mov(r1, Operand(r1, LSR, kSmiTagSize));
 
   // Copy the fixed array slots.
   Label loop;
-  // Setup r4 to point to the first array slot.
+  // Set up r4 to point to the first array slot.
   __ add(r4, r4, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
   __ bind(&loop);
   // Pre-decrement r2 with kPointerSize on each iteration.
   // Pre-decrement in order to skip receiver.
   __ ldr(r3, MemOperand(r2, kPointerSize, NegPreIndex));
   // Post-increment r4 with kPointerSize on each iteration.
   __ str(r3, MemOperand(r4, kPointerSize, PostIndex));
   __ sub(r1, r1, Operand(1));
   __ cmp(r1, Operand(0, RelocInfo::NONE));
   __ b(ne, &loop);
@@ skipping 594 matching lines @@
   {
     Handle<Code> adaptor =
       masm->isolate()->builtins()->ArgumentsAdaptorTrampoline();
     __ Jump(adaptor, RelocInfo::CODE_TARGET);
   }
 
   // CALL_NON_FUNCTION expects the non-function callee as receiver (instead
   // of the original receiver from the call site).
   __ bind(&non_function);
   __ str(r1, MemOperand(sp, argc_ * kPointerSize));
-  __ mov(r0, Operand(argc_));  // Setup the number of arguments.
+  __ mov(r0, Operand(argc_));  // Set up the number of arguments.
   __ mov(r2, Operand(0, RelocInfo::NONE));
   __ GetBuiltinEntry(r3, Builtins::CALL_NON_FUNCTION);
   __ SetCallKind(r5, CALL_AS_METHOD);
   __ Jump(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(),
           RelocInfo::CODE_TARGET);
 }
 
 
 // Unfortunately you have to run without snapshots to see most of these
 // names in the profile since most compare stubs end up in the snapshot.
@@ skipping 500 matching lines @@
   Register result = candidate;
   __ bind(&found_in_symbol_table);
   __ Move(r0, result);
 }
 
 
 void StringHelper::GenerateHashInit(MacroAssembler* masm,
                                     Register hash,
                                     Register character) {
   // hash = character + (character << 10);
-  __ LoadRoot(hash, Heap::kStringHashSeedRootIndex);
+  __ LoadRoot(hash, Heap::kHashSeedRootIndex);
   // Untag smi seed and add the character.
   __ add(hash, character, Operand(hash, LSR, kSmiTagSize));
   // hash += hash << 10;
   __ add(hash, hash, Operand(hash, LSL, 10));
   // hash ^= hash >> 6;
   __ eor(hash, hash, Operand(hash, LSR, 6));
 }
 
 
 void StringHelper::GenerateHashAddCharacter(MacroAssembler* masm,
                                             Register hash,
                                             Register character) {
   // hash += character;
   __ add(hash, hash, Operand(character));
   // hash += hash << 10;
   __ add(hash, hash, Operand(hash, LSL, 10));
   // hash ^= hash >> 6;
   __ eor(hash, hash, Operand(hash, LSR, 6));
 }
 
 
 void StringHelper::GenerateHashGetHash(MacroAssembler* masm,
                                        Register hash) {
   // hash += hash << 3;
   __ add(hash, hash, Operand(hash, LSL, 3));
   // hash ^= hash >> 11;
   __ eor(hash, hash, Operand(hash, LSR, 11));
   // hash += hash << 15;
-  __ add(hash, hash, Operand(hash, LSL, 15), SetCC);
+  __ add(hash, hash, Operand(hash, LSL, 15));
 
-  uint32_t kHashShiftCutOffMask = (1 << (32 - String::kHashShift)) - 1;
-  __ and_(hash, hash, Operand(kHashShiftCutOffMask));
+  __ and_(hash, hash, Operand(String::kHashBitMask), SetCC);
 
   // if (hash == 0) hash = 27;
-  __ mov(hash, Operand(27), LeaveCC, eq);
+  __ mov(hash, Operand(StringHasher::kZeroHash), LeaveCC, eq);
 }
 
 
 void SubStringStub::Generate(MacroAssembler* masm) {
   Label runtime;
 
   // Stack frame on entry.
   //  lr: return address
   //  sp[0]: to
   //  sp[4]: from
@@ skipping 1535 matching lines @@
   __ StoreNumberToDoubleElements(r0, r3, r1, r5, r6, r7, r9, r10,
                                  &slow_elements);
   __ Ret();
 }
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM