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chromium / v8 / v8 / f481316b1463597b265c3aa92a44dfe7abbe3c19 / . / src / ppc / builtins-ppc.cc
blob: bf65eaa69a90d4d97c0754c3c7895eb762ee35b9 [file] [log] [blame]
// Copyright 2014 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_PPC
#include "src/codegen.h"
#include "src/debug/debug.h"
#include "src/deoptimizer.h"
#include "src/full-codegen/full-codegen.h"
#include "src/runtime/runtime.h"
namespace v8 {
namespace internal {
#define __ ACCESS_MASM(masm)
void Builtins::Generate_Adaptor(MacroAssembler* masm, CFunctionId id,
BuiltinExtraArguments extra_args) {
// ----------- S t a t e -------------
// -- r3 : number of arguments excluding receiver
// -- r4 : called function (only guaranteed when
// extra_args requires it)
// -- cp : context
// -- sp[0] : last argument
// -- ...
// -- sp[4 * (argc - 1)] : first argument (argc == r0)
// -- sp[4 * argc] : receiver
// -----------------------------------
// Insert extra arguments.
int num_extra_args = 0;
if (extra_args == NEEDS_CALLED_FUNCTION) {
num_extra_args = 1;
__ push(r4);
} else {
DCHECK(extra_args == NO_EXTRA_ARGUMENTS);
}
// JumpToExternalReference expects r0 to contain the number of arguments
// including the receiver and the extra arguments.
__ addi(r3, r3, Operand(num_extra_args + 1));
__ JumpToExternalReference(ExternalReference(id, masm->isolate()));
}
// Load the built-in InternalArray function from the current context.
static void GenerateLoadInternalArrayFunction(MacroAssembler* masm,
Register result) {
// Load the native context.
__ LoadP(result,
MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX)));
__ LoadP(result, FieldMemOperand(result, GlobalObject::kNativeContextOffset));
// Load the InternalArray function from the native context.
__ LoadP(result,
MemOperand(result, Context::SlotOffset(
Context::INTERNAL_ARRAY_FUNCTION_INDEX)));
}
// Load the built-in Array function from the current context.
static void GenerateLoadArrayFunction(MacroAssembler* masm, Register result) {
// Load the native context.
__ LoadP(result,
MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX)));
__ LoadP(result, FieldMemOperand(result, GlobalObject::kNativeContextOffset));
// Load the Array function from the native context.
__ LoadP(
result,
MemOperand(result, Context::SlotOffset(Context::ARRAY_FUNCTION_INDEX)));
}
void Builtins::Generate_InternalArrayCode(MacroAssembler* masm) {
// ----------- S t a t e -------------
// -- r3 : number of arguments
// -- lr : return address
// -- sp[...]: constructor arguments
// -----------------------------------
Label generic_array_code, one_or_more_arguments, two_or_more_arguments;
// Get the InternalArray function.
GenerateLoadInternalArrayFunction(masm, r4);
if (FLAG_debug_code) {
// Initial map for the builtin InternalArray functions should be maps.
__ LoadP(r5, FieldMemOperand(r4, JSFunction::kPrototypeOrInitialMapOffset));
__ TestIfSmi(r5, r0);
__ Assert(ne, kUnexpectedInitialMapForInternalArrayFunction, cr0);
__ CompareObjectType(r5, r6, r7, MAP_TYPE);
__ Assert(eq, kUnexpectedInitialMapForInternalArrayFunction);
}
// Run the native code for the InternalArray function called as a normal
// function.
// tail call a stub
InternalArrayConstructorStub stub(masm->isolate());
__ TailCallStub(&stub);
}
void Builtins::Generate_ArrayCode(MacroAssembler* masm) {
// ----------- S t a t e -------------
// -- r3 : number of arguments
// -- lr : return address
// -- sp[...]: constructor arguments
// -----------------------------------
Label generic_array_code, one_or_more_arguments, two_or_more_arguments;
// Get the Array function.
GenerateLoadArrayFunction(masm, r4);
if (FLAG_debug_code) {
// Initial map for the builtin Array functions should be maps.
__ LoadP(r5, FieldMemOperand(r4, JSFunction::kPrototypeOrInitialMapOffset));
__ TestIfSmi(r5, r0);
__ Assert(ne, kUnexpectedInitialMapForArrayFunction, cr0);
__ CompareObjectType(r5, r6, r7, MAP_TYPE);
__ Assert(eq, kUnexpectedInitialMapForArrayFunction);
}
__ mr(r6, r4);
// Run the native code for the Array function called as a normal function.
// tail call a stub
__ LoadRoot(r5, Heap::kUndefinedValueRootIndex);
ArrayConstructorStub stub(masm->isolate());
__ TailCallStub(&stub);
}
void Builtins::Generate_StringConstructCode(MacroAssembler* masm) {
// ----------- S t a t e -------------
// -- r3 : number of arguments
// -- r4 : constructor function
// -- lr : return address
// -- sp[(argc - n - 1) * 4] : arg[n] (zero based)
// -- sp[argc * 4] : receiver
// -----------------------------------
Counters* counters = masm->isolate()->counters();
__ IncrementCounter(counters->string_ctor_calls(), 1, r5, r6);
Register function = r4;
if (FLAG_debug_code) {
__ LoadGlobalFunction(Context::STRING_FUNCTION_INDEX, r5);
__ cmp(function, r5);
__ Assert(eq, kUnexpectedStringFunction);
}
// Load the first arguments in r3 and get rid of the rest.
Label no_arguments;
__ cmpi(r3, Operand::Zero());
__ beq(&no_arguments);
// First args = sp[(argc - 1) * 4].
__ subi(r3, r3, Operand(1));
__ ShiftLeftImm(r3, r3, Operand(kPointerSizeLog2));
__ add(sp, sp, r3);
__ LoadP(r3, MemOperand(sp));
// sp now point to args[0], drop args[0] + receiver.
__ Drop(2);
Register argument = r5;
Label not_cached, argument_is_string;
__ LookupNumberStringCache(r3, // Input.
argument, // Result.
r6, // Scratch.
r7, // Scratch.
r8, // Scratch.
&not_cached);
__ IncrementCounter(counters->string_ctor_cached_number(), 1, r6, r7);
__ bind(&argument_is_string);
// ----------- S t a t e -------------
// -- r5 : argument converted to string
// -- r4 : constructor function
// -- lr : return address
// -----------------------------------
Label gc_required;
__ Allocate(JSValue::kSize,
r3, // Result.
r6, // Scratch.
r7, // Scratch.
&gc_required, TAG_OBJECT);
// Initialising the String Object.
Register map = r6;
__ LoadGlobalFunctionInitialMap(function, map, r7);
if (FLAG_debug_code) {
__ lbz(r7, FieldMemOperand(map, Map::kInstanceSizeOffset));
__ cmpi(r7, Operand(JSValue::kSize >> kPointerSizeLog2));
__ Assert(eq, kUnexpectedStringWrapperInstanceSize);
__ lbz(r7, FieldMemOperand(map, Map::kUnusedPropertyFieldsOffset));
__ cmpi(r7, Operand::Zero());
__ Assert(eq, kUnexpectedUnusedPropertiesOfStringWrapper);
}
__ StoreP(map, FieldMemOperand(r3, HeapObject::kMapOffset), r0);
__ LoadRoot(r6, Heap::kEmptyFixedArrayRootIndex);
__ StoreP(r6, FieldMemOperand(r3, JSObject::kPropertiesOffset), r0);
__ StoreP(r6, FieldMemOperand(r3, JSObject::kElementsOffset), r0);
__ StoreP(argument, FieldMemOperand(r3, JSValue::kValueOffset), r0);
// Ensure the object is fully initialized.
STATIC_ASSERT(JSValue::kSize == 4 * kPointerSize);
__ Ret();
// The argument was not found in the number to string cache. Check
// if it's a string already before calling the conversion builtin.
Label convert_argument;
__ bind(&not_cached);
__ JumpIfSmi(r3, &convert_argument);
// Is it a String?
__ LoadP(r5, FieldMemOperand(r3, HeapObject::kMapOffset));
__ lbz(r6, FieldMemOperand(r5, Map::kInstanceTypeOffset));
STATIC_ASSERT(kNotStringTag != 0);
__ andi(r0, r6, Operand(kIsNotStringMask));
__ bne(&convert_argument, cr0);
__ mr(argument, r3);
__ IncrementCounter(counters->string_ctor_conversions(), 1, r6, r7);
__ b(&argument_is_string);
// Invoke the conversion builtin and put the result into r5.
__ bind(&convert_argument);
__ push(function); // Preserve the function.
__ IncrementCounter(counters->string_ctor_conversions(), 1, r6, r7);
{
FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
__ push(r3);
__ InvokeBuiltin(Context::TO_STRING_BUILTIN_INDEX, CALL_FUNCTION);
}
__ pop(function);
__ mr(argument, r3);
__ b(&argument_is_string);
// Load the empty string into r5, remove the receiver from the
// stack, and jump back to the case where the argument is a string.
__ bind(&no_arguments);
__ LoadRoot(argument, Heap::kempty_stringRootIndex);
__ Drop(1);
__ b(&argument_is_string);
// At this point the argument is already a string. Call runtime to
// create a string wrapper.
__ bind(&gc_required);
__ IncrementCounter(counters->string_ctor_gc_required(), 1, r6, r7);
{
FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
__ push(argument);
__ CallRuntime(Runtime::kNewStringWrapper, 1);
}
__ Ret();
}
static void CallRuntimePassFunction(MacroAssembler* masm,
Runtime::FunctionId function_id) {
FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
// Push a copy of the function onto the stack.
// Push function as parameter to the runtime call.
__ Push(r4, r4);
__ CallRuntime(function_id, 1);
// Restore reciever.
__ Pop(r4);
}
static void GenerateTailCallToSharedCode(MacroAssembler* masm) {
__ LoadP(ip, FieldMemOperand(r4, JSFunction::kSharedFunctionInfoOffset));
__ LoadP(ip, FieldMemOperand(ip, SharedFunctionInfo::kCodeOffset));
__ addi(ip, ip, Operand(Code::kHeaderSize - kHeapObjectTag));
__ JumpToJSEntry(ip);
}
static void GenerateTailCallToReturnedCode(MacroAssembler* masm) {
__ addi(ip, r3, Operand(Code::kHeaderSize - kHeapObjectTag));
__ JumpToJSEntry(ip);
}
void Builtins::Generate_InOptimizationQueue(MacroAssembler* masm) {
// Checking whether the queued function is ready for install is optional,
// since we come across interrupts and stack checks elsewhere. However,
// not checking may delay installing ready functions, and always checking
// would be quite expensive. A good compromise is to first check against
// stack limit as a cue for an interrupt signal.
Label ok;
__ LoadRoot(ip, Heap::kStackLimitRootIndex);
__ cmpl(sp, ip);
__ bge(&ok);
CallRuntimePassFunction(masm, Runtime::kTryInstallOptimizedCode);
GenerateTailCallToReturnedCode(masm);
__ bind(&ok);
GenerateTailCallToSharedCode(masm);
}
static void Generate_JSConstructStubHelper(MacroAssembler* masm,
bool is_api_function,
bool create_memento) {
// ----------- S t a t e -------------
// -- r3 : number of arguments
// -- r4 : constructor function
// -- r5 : allocation site or undefined
// -- r6 : original constructor
// -- lr : return address
// -- sp[...]: constructor arguments
// -----------------------------------
// Should never create mementos for api functions.
DCHECK(!is_api_function || !create_memento);
Isolate* isolate = masm->isolate();
// Enter a construct frame.
{
FrameAndConstantPoolScope scope(masm, StackFrame::CONSTRUCT);
// Preserve the incoming parameters on the stack.
__ AssertUndefinedOrAllocationSite(r5, r7);
__ SmiTag(r3);
__ Push(r5, r3, r4, r6);
// Try to allocate the object without transitioning into C code. If any of
// the preconditions is not met, the code bails out to the runtime call.
Label rt_call, allocated;
if (FLAG_inline_new) {
ExternalReference debug_step_in_fp =
ExternalReference::debug_step_in_fp_address(isolate);
__ mov(r5, Operand(debug_step_in_fp));
__ LoadP(r5, MemOperand(r5));
__ cmpi(r5, Operand::Zero());
__ bne(&rt_call);
// Fall back to runtime if the original constructor and function differ.
__ cmp(r4, r6);
__ bne(&rt_call);
// Load the initial map and verify that it is in fact a map.
// r4: constructor function
__ LoadP(r5,
FieldMemOperand(r4, JSFunction::kPrototypeOrInitialMapOffset));
__ JumpIfSmi(r5, &rt_call);
__ CompareObjectType(r5, r8, r7, MAP_TYPE);
__ bne(&rt_call);
// Check that the constructor is not constructing a JSFunction (see
// comments in Runtime_NewObject in runtime.cc). In which case the
// initial map's instance type would be JS_FUNCTION_TYPE.
// r4: constructor function
// r5: initial map
__ CompareInstanceType(r5, r8, JS_FUNCTION_TYPE);
__ beq(&rt_call);
if (!is_api_function) {
Label allocate;
MemOperand bit_field3 = FieldMemOperand(r5, Map::kBitField3Offset);
// Check if slack tracking is enabled.
__ lwz(r7, bit_field3);
__ DecodeField<Map::Counter>(r11, r7);
__ cmpi(r11, Operand(Map::kSlackTrackingCounterEnd));
__ blt(&allocate);
// Decrease generous allocation count.
__ Add(r7, r7, -(1 << Map::Counter::kShift), r0);
__ stw(r7, bit_field3);
__ cmpi(r11, Operand(Map::kSlackTrackingCounterEnd));
__ bne(&allocate);
__ push(r4);
__ Push(r5, r4); // r4 = constructor
__ CallRuntime(Runtime::kFinalizeInstanceSize, 1);
__ Pop(r4, r5);
__ bind(&allocate);
}
// Now allocate the JSObject on the heap.
// r4: constructor function
// r5: initial map
Label rt_call_reload_new_target;
__ lbz(r6, FieldMemOperand(r5, Map::kInstanceSizeOffset));
if (create_memento) {
__ addi(r6, r6, Operand(AllocationMemento::kSize / kPointerSize));
}
__ Allocate(r6, r7, r8, r9, &rt_call_reload_new_target, SIZE_IN_WORDS);
// Allocated the JSObject, now initialize the fields. Map is set to
// initial map and properties and elements are set to empty fixed array.
// r4: constructor function
// r5: initial map
// r6: object size (including memento if create_memento)
// r7: JSObject (not tagged)
__ LoadRoot(r9, Heap::kEmptyFixedArrayRootIndex);
__ mr(r8, r7);
__ StoreP(r5, MemOperand(r8, JSObject::kMapOffset));
__ StoreP(r9, MemOperand(r8, JSObject::kPropertiesOffset));
__ StoreP(r9, MemOperand(r8, JSObject::kElementsOffset));
__ addi(r8, r8, Operand(JSObject::kElementsOffset + kPointerSize));
__ ShiftLeftImm(r9, r6, Operand(kPointerSizeLog2));
__ add(r9, r7, r9); // End of object.
// Fill all the in-object properties with the appropriate filler.
// r4: constructor function
// r5: initial map
// r6: object size (in words, including memento if create_memento)
// r7: JSObject (not tagged)
// r8: First in-object property of JSObject (not tagged)
// r9: End of object
DCHECK_EQ(3 * kPointerSize, JSObject::kHeaderSize);
__ LoadRoot(r10, Heap::kUndefinedValueRootIndex);
if (!is_api_function) {
Label no_inobject_slack_tracking;
// Check if slack tracking is enabled.
__ cmpi(r11, Operand(Map::kSlackTrackingCounterEnd));
__ blt(&no_inobject_slack_tracking);
// Allocate object with a slack.
__ lbz(
r3,
FieldMemOperand(
r5, Map::kInObjectPropertiesOrConstructorFunctionIndexOffset));
__ lbz(r5, FieldMemOperand(r5, Map::kUnusedPropertyFieldsOffset));
__ sub(r3, r3, r5);
if (FLAG_debug_code) {
__ ShiftLeftImm(r0, r3, Operand(kPointerSizeLog2));
__ add(r0, r8, r0);
// r0: offset of first field after pre-allocated fields
__ cmp(r0, r9);
__ Assert(le, kUnexpectedNumberOfPreAllocatedPropertyFields);
}
{
Label done;
__ cmpi(r3, Operand::Zero());
__ beq(&done);
__ InitializeNFieldsWithFiller(r8, r3, r10);
__ bind(&done);
}
// To allow for truncation.
__ LoadRoot(r10, Heap::kOnePointerFillerMapRootIndex);
// Fill the remaining fields with one pointer filler map.
__ bind(&no_inobject_slack_tracking);
}
if (create_memento) {
__ subi(r3, r9, Operand(AllocationMemento::kSize));
__ InitializeFieldsWithFiller(r8, r3, r10);
// Fill in memento fields.
// r8: points to the allocated but uninitialized memento.
__ LoadRoot(r10, Heap::kAllocationMementoMapRootIndex);
__ StoreP(r10, MemOperand(r8, AllocationMemento::kMapOffset));
// Load the AllocationSite
__ LoadP(r10, MemOperand(sp, 3 * kPointerSize));
__ AssertUndefinedOrAllocationSite(r10, r3);
__ StoreP(r10,
MemOperand(r8, AllocationMemento::kAllocationSiteOffset));
__ addi(r8, r8, Operand(AllocationMemento::kAllocationSiteOffset +
kPointerSize));
} else {
__ InitializeFieldsWithFiller(r8, r9, r10);
}
// Add the object tag to make the JSObject real, so that we can continue
// and jump into the continuation code at any time from now on.
__ addi(r7, r7, Operand(kHeapObjectTag));
// Continue with JSObject being successfully allocated
// r7: JSObject
__ b(&allocated);
// Reload the original constructor and fall-through.
__ bind(&rt_call_reload_new_target);
__ LoadP(r6, MemOperand(sp, 0 * kPointerSize));
}
// Allocate the new receiver object using the runtime call.
// r4: constructor function
// r6: original constructor
__ bind(&rt_call);
if (create_memento) {
// Get the cell or allocation site.
__ LoadP(r5, MemOperand(sp, 3 * kPointerSize));
__ Push(r5, r4, r6);
__ CallRuntime(Runtime::kNewObjectWithAllocationSite, 3);
} else {
__ Push(r4, r6);
__ CallRuntime(Runtime::kNewObject, 2);
}
__ mr(r7, r3);
// Runtime_NewObjectWithAllocationSite increments allocation count.
// Skip the increment.
Label count_incremented;
if (create_memento) {
__ b(&count_incremented);
}
// Receiver for constructor call allocated.
// r7: JSObject
__ bind(&allocated);
if (create_memento) {
__ LoadP(r5, MemOperand(sp, 3 * kPointerSize));
__ LoadRoot(r8, Heap::kUndefinedValueRootIndex);
__ cmp(r5, r8);
__ beq(&count_incremented);
// r5 is an AllocationSite. We are creating a memento from it, so we
// need to increment the memento create count.
__ LoadP(
r6, FieldMemOperand(r5, AllocationSite::kPretenureCreateCountOffset));
__ AddSmiLiteral(r6, r6, Smi::FromInt(1), r0);
__ StoreP(
r6, FieldMemOperand(r5, AllocationSite::kPretenureCreateCountOffset),
r0);
__ bind(&count_incremented);
}
// Restore the parameters.
__ Pop(r4, ip);
// Retrieve smi-tagged arguments count from the stack.
__ LoadP(r6, MemOperand(sp));
// Push new.target onto the construct frame. This is stored just below the
// receiver on the stack.
__ Push(ip, r7, r7);
// Set up pointer to last argument.
__ addi(r5, fp, Operand(StandardFrameConstants::kCallerSPOffset));
// Copy arguments and receiver to the expression stack.
// r4: constructor function
// r5: address of last argument (caller sp)
// r6: number of arguments (smi-tagged)
// sp[0]: receiver
// sp[1]: receiver
// sp[2]: new.target
// sp[3]: number of arguments (smi-tagged)
Label loop, no_args;
__ SmiUntag(r3, r6, SetRC);
__ beq(&no_args, cr0);
__ ShiftLeftImm(ip, r3, Operand(kPointerSizeLog2));
__ sub(sp, sp, ip);
__ mtctr(r3);
__ bind(&loop);
__ subi(ip, ip, Operand(kPointerSize));
__ LoadPX(r0, MemOperand(r5, ip));
__ StorePX(r0, MemOperand(sp, ip));
__ bdnz(&loop);
__ bind(&no_args);
// Call the function.
// r3: number of arguments
// r4: constructor function
if (is_api_function) {
__ LoadP(cp, FieldMemOperand(r4, JSFunction::kContextOffset));
Handle<Code> code = masm->isolate()->builtins()->HandleApiCallConstruct();
__ Call(code, RelocInfo::CODE_TARGET);
} else {
ParameterCount actual(r3);
__ InvokeFunction(r4, actual, CALL_FUNCTION, NullCallWrapper());
}
// Store offset of return address for deoptimizer.
if (!is_api_function) {
masm->isolate()->heap()->SetConstructStubDeoptPCOffset(masm->pc_offset());
}
// Restore context from the frame.
// r3: result
// sp[0]: receiver
// sp[1]: new.target
// sp[2]: number of arguments (smi-tagged)
__ LoadP(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
// If the result is an object (in the ECMA sense), we should get rid
// of the receiver and use the result; see ECMA-262 section 13.2.2-7
// on page 74.
Label use_receiver, exit;
// If the result is a smi, it is *not* an object in the ECMA sense.
// r3: result
// sp[0]: receiver
// sp[1]: new.target
// sp[2]: number of arguments (smi-tagged)
__ JumpIfSmi(r3, &use_receiver);
// If the type of the result (stored in its map) is less than
// FIRST_SPEC_OBJECT_TYPE, it is not an object in the ECMA sense.
__ CompareObjectType(r3, r4, r6, FIRST_SPEC_OBJECT_TYPE);
__ bge(&exit);
// Throw away the result of the constructor invocation and use the
// on-stack receiver as the result.
__ bind(&use_receiver);
__ LoadP(r3, MemOperand(sp));
// Remove receiver from the stack, remove caller arguments, and
// return.
__ bind(&exit);
// r3: result
// sp[0]: receiver (newly allocated object)
// sp[1]: new.target (original constructor)
// sp[2]: number of arguments (smi-tagged)
__ LoadP(r4, MemOperand(sp, 2 * kPointerSize));
// Leave construct frame.
}
__ SmiToPtrArrayOffset(r4, r4);
__ add(sp, sp, r4);
__ addi(sp, sp, Operand(kPointerSize));
__ IncrementCounter(isolate->counters()->constructed_objects(), 1, r4, r5);
__ blr();
}
void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
Generate_JSConstructStubHelper(masm, false, FLAG_pretenuring_call_new);
}
void Builtins::Generate_JSConstructStubApi(MacroAssembler* masm) {
Generate_JSConstructStubHelper(masm, true, false);
}
void Builtins::Generate_JSConstructStubForDerived(MacroAssembler* masm) {
// ----------- S t a t e -------------
// -- r3 : number of arguments
// -- r4 : constructor function
// -- r5 : allocation site or undefined
// -- r6 : original constructor
// -- lr : return address
// -- sp[...]: constructor arguments
// -----------------------------------
{
FrameAndConstantPoolScope scope(masm, StackFrame::CONSTRUCT);
__ AssertUndefinedOrAllocationSite(r5, r7);
// Smi-tagged arguments count.
__ mr(r7, r3);
__ SmiTag(r7, SetRC);
// receiver is the hole.
__ LoadRoot(ip, Heap::kTheHoleValueRootIndex);
// allocation site, smi arguments count, new.target, receiver
__ Push(r5, r7, r6, ip);
// Set up pointer to last argument.
__ addi(r5, fp, Operand(StandardFrameConstants::kCallerSPOffset));
// Copy arguments and receiver to the expression stack.
// r3: number of arguments
// r4: constructor function
// r5: address of last argument (caller sp)
// r7: number of arguments (smi-tagged)
// cr0: compare against zero of arguments
// sp[0]: receiver
// sp[1]: new.target
// sp[2]: number of arguments (smi-tagged)
Label loop, no_args;
__ beq(&no_args, cr0);
__ ShiftLeftImm(ip, r3, Operand(kPointerSizeLog2));
__ mtctr(r3);
__ bind(&loop);
__ subi(ip, ip, Operand(kPointerSize));
__ LoadPX(r0, MemOperand(r5, ip));
__ push(r0);
__ bdnz(&loop);
__ bind(&no_args);
// Handle step in.
Label skip_step_in;
ExternalReference debug_step_in_fp =
ExternalReference::debug_step_in_fp_address(masm->isolate());
__ mov(r5, Operand(debug_step_in_fp));
__ LoadP(r5, MemOperand(r5));
__ and_(r0, r5, r5, SetRC);
__ beq(&skip_step_in, cr0);
__ Push(r3, r4, r4);
__ CallRuntime(Runtime::kHandleStepInForDerivedConstructors, 1);
__ Pop(r3, r4);
__ bind(&skip_step_in);
// Call the function.
// r3: number of arguments
// r4: constructor function
ParameterCount actual(r3);
__ InvokeFunction(r4, actual, CALL_FUNCTION, NullCallWrapper());
// Restore context from the frame.
// r3: result
// sp[0]: number of arguments (smi-tagged)
__ LoadP(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
// Get arguments count, skipping over new.target.
__ LoadP(r4, MemOperand(sp, kPointerSize));
// Leave construct frame.
}
__ SmiToPtrArrayOffset(r4, r4);
__ add(sp, sp, r4);
__ addi(sp, sp, Operand(kPointerSize));
__ blr();
}
enum IsTagged { kArgcIsSmiTagged, kArgcIsUntaggedInt };
// Clobbers r5; preserves all other registers.
static void Generate_CheckStackOverflow(MacroAssembler* masm,
const int calleeOffset, Register argc,
IsTagged argc_is_tagged) {
// Check the stack for overflow. We are not trying to catch
// interruptions (e.g. debug break and preemption) here, so the "real stack
// limit" is checked.
Label okay;
__ LoadRoot(r5, Heap::kRealStackLimitRootIndex);
// Make r5 the space we have left. The stack might already be overflowed
// here which will cause r5 to become negative.
__ sub(r5, sp, r5);
// Check if the arguments will overflow the stack.
if (argc_is_tagged == kArgcIsSmiTagged) {
__ SmiToPtrArrayOffset(r0, argc);
} else {
DCHECK(argc_is_tagged == kArgcIsUntaggedInt);
__ ShiftLeftImm(r0, argc, Operand(kPointerSizeLog2));
}
__ cmp(r5, r0);
__ bgt(&okay); // Signed comparison.
// Out of stack space.
__ LoadP(r4, MemOperand(fp, calleeOffset));
if (argc_is_tagged == kArgcIsUntaggedInt) {
__ SmiTag(argc);
}
__ Push(r4, argc);
__ InvokeBuiltin(Context::STACK_OVERFLOW_BUILTIN_INDEX, CALL_FUNCTION);
__ bind(&okay);
}
static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm,
bool is_construct) {
// Called from Generate_JS_Entry
// r3: code entry
// r4: function
// r5: receiver
// r6: argc
// r7: argv
// r0,r8-r9, cp may be clobbered
ProfileEntryHookStub::MaybeCallEntryHook(masm);
// Clear the context before we push it when entering the internal frame.
__ li(cp, Operand::Zero());
// Enter an internal frame.
{
FrameScope scope(masm, StackFrame::INTERNAL);
// Set up the context from the function argument.
__ LoadP(cp, FieldMemOperand(r4, JSFunction::kContextOffset));
__ InitializeRootRegister();
// Push the function and the receiver onto the stack.
__ push(r4);
__ push(r5);
// Check if we have enough stack space to push all arguments.
// The function is the first thing that was pushed above after entering
// the internal frame.
const int kFunctionOffset =
InternalFrameConstants::kCodeOffset - kPointerSize;
// Clobbers r5.
Generate_CheckStackOverflow(masm, kFunctionOffset, r6, kArgcIsUntaggedInt);
// Copy arguments to the stack in a loop.
// r4: function
// r6: argc
// r7: argv, i.e. points to first arg
Label loop, entry;
__ ShiftLeftImm(r0, r6, Operand(kPointerSizeLog2));
__ add(r5, r7, r0);
// r5 points past last arg.
__ b(&entry);
__ bind(&loop);
__ LoadP(r8, MemOperand(r7)); // read next parameter
__ addi(r7, r7, Operand(kPointerSize));
__ LoadP(r0, MemOperand(r8)); // dereference handle
__ push(r0); // push parameter
__ bind(&entry);
__ cmp(r7, r5);
__ bne(&loop);
// Initialize all JavaScript callee-saved registers, since they will be seen
// by the garbage collector as part of handlers.
__ LoadRoot(r7, Heap::kUndefinedValueRootIndex);
__ mr(r14, r7);
__ mr(r15, r7);
__ mr(r16, r7);
__ mr(r17, r7);
// Invoke the code and pass argc as r3.
__ mr(r3, r6);
if (is_construct) {
// No type feedback cell is available
__ LoadRoot(r5, Heap::kUndefinedValueRootIndex);
CallConstructStub stub(masm->isolate(), NO_CALL_CONSTRUCTOR_FLAGS);
__ CallStub(&stub);
} else {
ParameterCount actual(r3);
__ InvokeFunction(r4, actual, CALL_FUNCTION, NullCallWrapper());
}
// Exit the JS frame and remove the parameters (except function), and
// return.
}
__ blr();
// r3: result
}
void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) {
Generate_JSEntryTrampolineHelper(masm, false);
}
void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) {
Generate_JSEntryTrampolineHelper(masm, true);
}
// Generate code for entering a JS function with the interpreter.
// On entry to the function the receiver and arguments have been pushed on the
// stack left to right. The actual argument count matches the formal parameter
// count expected by the function.
//
// The live registers are:
// o r4: the JS function object being called.
// o cp: our context
// o pp: the caller's constant pool pointer (if enabled)
// o fp: the caller's frame pointer
// o sp: stack pointer
// o lr: return address
//
// The function builds a JS frame. Please see JavaScriptFrameConstants in
// frames-ppc.h for its layout.
// TODO(rmcilroy): We will need to include the current bytecode pointer in the
// frame.
void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) {
// Open a frame scope to indicate that there is a frame on the stack. The
// MANUAL indicates that the scope shouldn't actually generate code to set up
// the frame (that is done below).
FrameScope frame_scope(masm, StackFrame::MANUAL);
__ PushFixedFrame(r4);
__ addi(fp, sp, Operand(StandardFrameConstants::kFixedFrameSizeFromFp));
// Get the bytecode array from the function object and load the pointer to the
// first entry into kInterpreterBytecodeRegister.
__ LoadP(r3, FieldMemOperand(r4, JSFunction::kSharedFunctionInfoOffset));
__ LoadP(kInterpreterBytecodeArrayRegister,
FieldMemOperand(r3, SharedFunctionInfo::kFunctionDataOffset));
if (FLAG_debug_code) {
// Check function data field is actually a BytecodeArray object.
__ TestIfSmi(kInterpreterBytecodeArrayRegister, r0);
__ Assert(ne, kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry);
__ CompareObjectType(kInterpreterBytecodeArrayRegister, r3, no_reg,
BYTECODE_ARRAY_TYPE);
__ Assert(eq, kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry);
}
// Allocate the local and temporary register file on the stack.
{
// Load frame size (word) from the BytecodeArray object.
__ lwz(r5, FieldMemOperand(kInterpreterBytecodeArrayRegister,
BytecodeArray::kFrameSizeOffset));
// Do a stack check to ensure we don't go over the limit.
Label ok;
__ sub(r6, sp, r5);
__ LoadRoot(r0, Heap::kRealStackLimitRootIndex);
__ cmpl(r6, r0);
__ bge(&ok);
__ InvokeBuiltin(Context::STACK_OVERFLOW_BUILTIN_INDEX, CALL_FUNCTION);
__ bind(&ok);
// If ok, push undefined as the initial value for all register file entries.
// TODO(rmcilroy): Consider doing more than one push per loop iteration.
Label loop, no_args;
__ LoadRoot(r6, Heap::kUndefinedValueRootIndex);
__ ShiftRightImm(r5, r5, Operand(kPointerSizeLog2), SetRC);
__ beq(&no_args, cr0);
__ mtctr(r5);
__ bind(&loop);
__ push(r6);
__ bdnz(&loop);
__ bind(&no_args);
}
// TODO(rmcilroy): List of things not currently dealt with here but done in
// fullcodegen's prologue:
// - Support profiler (specifically profiling_counter).
// - Call ProfileEntryHookStub when isolate has a function_entry_hook.
// - Allow simulator stop operations if FLAG_stop_at is set.
// - Deal with sloppy mode functions which need to replace the
// receiver with the global proxy when called as functions (without an
// explicit receiver object).
// - Code aging of the BytecodeArray object.
// - Supporting FLAG_trace.
//
// The following items are also not done here, and will probably be done using
// explicit bytecodes instead:
// - Allocating a new local context if applicable.
// - Setting up a local binding to the this function, which is used in
// derived constructors with super calls.
// - Setting new.target if required.
// - Dealing with REST parameters (only if
// https://codereview.chromium.org/1235153006 doesn't land by then).
// - Dealing with argument objects.
// Perform stack guard check.
{
Label ok;
__ LoadRoot(r0, Heap::kStackLimitRootIndex);
__ cmp(sp, r0);
__ bge(&ok);
__ CallRuntime(Runtime::kStackGuard, 0);
__ bind(&ok);
}
// Load accumulator, register file, bytecode offset, dispatch table into
// registers.
__ LoadRoot(kInterpreterAccumulatorRegister, Heap::kUndefinedValueRootIndex);
__ subi(
kInterpreterRegisterFileRegister, fp,
Operand(kPointerSize + StandardFrameConstants::kFixedFrameSizeFromFp));
__ mov(kInterpreterBytecodeOffsetRegister,
Operand(BytecodeArray::kHeaderSize - kHeapObjectTag));
__ LoadRoot(kInterpreterDispatchTableRegister,
Heap::kInterpreterTableRootIndex);
__ addi(kInterpreterDispatchTableRegister, kInterpreterDispatchTableRegister,
Operand(FixedArray::kHeaderSize - kHeapObjectTag));
// Dispatch to the first bytecode handler for the function.
__ lbzx(r4, MemOperand(kInterpreterBytecodeArrayRegister,
kInterpreterBytecodeOffsetRegister));
__ ShiftLeftImm(ip, r4, Operand(kPointerSizeLog2));
__ LoadPX(ip, MemOperand(kInterpreterDispatchTableRegister, ip));
// TODO(rmcilroy): Make dispatch table point to code entrys to avoid untagging
// and header removal.
__ addi(ip, ip, Operand(Code::kHeaderSize - kHeapObjectTag));
__ Call(ip);
}
void Builtins::Generate_InterpreterExitTrampoline(MacroAssembler* masm) {
// TODO(rmcilroy): List of things not currently dealt with here but done in
// fullcodegen's EmitReturnSequence.
// - Supporting FLAG_trace for Runtime::TraceExit.
// - Support profiler (specifically decrementing profiling_counter
// appropriately and calling out to HandleInterrupts if necessary).
// The return value is in accumulator, which is already in r3.
// Leave the frame (also dropping the register file).
__ LeaveFrame(StackFrame::JAVA_SCRIPT);
// Drop receiver + arguments.
__ Drop(1); // TODO(rmcilroy): Get number of arguments from BytecodeArray.
__ blr();
}
void Builtins::Generate_CompileLazy(MacroAssembler* masm) {
CallRuntimePassFunction(masm, Runtime::kCompileLazy);
GenerateTailCallToReturnedCode(masm);
}
static void CallCompileOptimized(MacroAssembler* masm, bool concurrent) {
FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
// Push a copy of the function onto the stack.
// Push function as parameter to the runtime call.
__ Push(r4, r4);
// Whether to compile in a background thread.
__ LoadRoot(
r0, concurrent ? Heap::kTrueValueRootIndex : Heap::kFalseValueRootIndex);
__ push(r0);
__ CallRuntime(Runtime::kCompileOptimized, 2);
// Restore receiver.
__ pop(r4);
}
void Builtins::Generate_CompileOptimized(MacroAssembler* masm) {
CallCompileOptimized(masm, false);
GenerateTailCallToReturnedCode(masm);
}
void Builtins::Generate_CompileOptimizedConcurrent(MacroAssembler* masm) {
CallCompileOptimized(masm, true);
GenerateTailCallToReturnedCode(masm);
}
static void GenerateMakeCodeYoungAgainCommon(MacroAssembler* masm) {
// For now, we are relying on the fact that make_code_young doesn't do any
// garbage collection which allows us to save/restore the registers without
// worrying about which of them contain pointers. We also don't build an
// internal frame to make the code faster, since we shouldn't have to do stack
// crawls in MakeCodeYoung. This seems a bit fragile.
// Point r3 at the start of the PlatformCodeAge sequence.
__ mr(r3, ip);
// The following registers must be saved and restored when calling through to
// the runtime:
// r3 - contains return address (beginning of patch sequence)
// r4 - isolate
// lr - return address
FrameScope scope(masm, StackFrame::MANUAL);
__ mflr(r0);
__ MultiPush(r0.bit() | r3.bit() | r4.bit() | fp.bit());
__ PrepareCallCFunction(2, 0, r5);
__ mov(r4, Operand(ExternalReference::isolate_address(masm->isolate())));
__ CallCFunction(
ExternalReference::get_make_code_young_function(masm->isolate()), 2);
__ MultiPop(r0.bit() | r3.bit() | r4.bit() | fp.bit());
__ mtlr(r0);
__ mr(ip, r3);
__ Jump(ip);
}
#define DEFINE_CODE_AGE_BUILTIN_GENERATOR(C) \
void Builtins::Generate_Make##C##CodeYoungAgainEvenMarking( \
MacroAssembler* masm) { \
GenerateMakeCodeYoungAgainCommon(masm); \
} \
void Builtins::Generate_Make##C##CodeYoungAgainOddMarking( \
MacroAssembler* masm) { \
GenerateMakeCodeYoungAgainCommon(masm); \
}
CODE_AGE_LIST(DEFINE_CODE_AGE_BUILTIN_GENERATOR)
#undef DEFINE_CODE_AGE_BUILTIN_GENERATOR
void Builtins::Generate_MarkCodeAsExecutedOnce(MacroAssembler* masm) {
// For now, we are relying on the fact that make_code_young doesn't do any
// garbage collection which allows us to save/restore the registers without
// worrying about which of them contain pointers. We also don't build an
// internal frame to make the code faster, since we shouldn't have to do stack
// crawls in MakeCodeYoung. This seems a bit fragile.
// Point r3 at the start of the PlatformCodeAge sequence.
__ mr(r3, ip);
// The following registers must be saved and restored when calling through to
// the runtime:
// r3 - contains return address (beginning of patch sequence)
// r4 - isolate
// lr - return address
FrameScope scope(masm, StackFrame::MANUAL);
__ mflr(r0);
__ MultiPush(r0.bit() | r3.bit() | r4.bit() | fp.bit());
__ PrepareCallCFunction(2, 0, r5);
__ mov(r4, Operand(ExternalReference::isolate_address(masm->isolate())));
__ CallCFunction(
ExternalReference::get_mark_code_as_executed_function(masm->isolate()),
2);
__ MultiPop(r0.bit() | r3.bit() | r4.bit() | fp.bit());
__ mtlr(r0);
__ mr(ip, r3);
// Perform prologue operations usually performed by the young code stub.
__ PushFixedFrame(r4);
__ addi(fp, sp, Operand(StandardFrameConstants::kFixedFrameSizeFromFp));
// Jump to point after the code-age stub.
__ addi(r3, ip, Operand(kNoCodeAgeSequenceLength));
__ Jump(r3);
}
void Builtins::Generate_MarkCodeAsExecutedTwice(MacroAssembler* masm) {
GenerateMakeCodeYoungAgainCommon(masm);
}
void Builtins::Generate_MarkCodeAsToBeExecutedOnce(MacroAssembler* masm) {
Generate_MarkCodeAsExecutedOnce(masm);
}
static void Generate_NotifyStubFailureHelper(MacroAssembler* masm,
SaveFPRegsMode save_doubles) {
{
FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
// Preserve registers across notification, this is important for compiled
// stubs that tail call the runtime on deopts passing their parameters in
// registers.
__ MultiPush(kJSCallerSaved | kCalleeSaved);
// Pass the function and deoptimization type to the runtime system.
__ CallRuntime(Runtime::kNotifyStubFailure, 0, save_doubles);
__ MultiPop(kJSCallerSaved | kCalleeSaved);
}
__ addi(sp, sp, Operand(kPointerSize)); // Ignore state
__ blr(); // Jump to miss handler
}
void Builtins::Generate_NotifyStubFailure(MacroAssembler* masm) {
Generate_NotifyStubFailureHelper(masm, kDontSaveFPRegs);
}
void Builtins::Generate_NotifyStubFailureSaveDoubles(MacroAssembler* masm) {
Generate_NotifyStubFailureHelper(masm, kSaveFPRegs);
}
static void Generate_NotifyDeoptimizedHelper(MacroAssembler* masm,
Deoptimizer::BailoutType type) {
{
FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
// Pass the function and deoptimization type to the runtime system.
__ LoadSmiLiteral(r3, Smi::FromInt(static_cast<int>(type)));
__ push(r3);
__ CallRuntime(Runtime::kNotifyDeoptimized, 1);
}
// Get the full codegen state from the stack and untag it -> r9.
__ LoadP(r9, MemOperand(sp, 0 * kPointerSize));
__ SmiUntag(r9);
// Switch on the state.
Label with_tos_register, unknown_state;
__ cmpi(r9, Operand(FullCodeGenerator::NO_REGISTERS));
__ bne(&with_tos_register);
__ addi(sp, sp, Operand(1 * kPointerSize)); // Remove state.
__ Ret();
__ bind(&with_tos_register);
__ LoadP(r3, MemOperand(sp, 1 * kPointerSize));
__ cmpi(r9, Operand(FullCodeGenerator::TOS_REG));
__ bne(&unknown_state);
__ addi(sp, sp, Operand(2 * kPointerSize)); // Remove state.
__ Ret();
__ bind(&unknown_state);
__ stop("no cases left");
}
void Builtins::Generate_NotifyDeoptimized(MacroAssembler* masm) {
Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::EAGER);
}
void Builtins::Generate_NotifySoftDeoptimized(MacroAssembler* masm) {
Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::SOFT);
}
void Builtins::Generate_NotifyLazyDeoptimized(MacroAssembler* masm) {
Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::LAZY);
}
void Builtins::Generate_OnStackReplacement(MacroAssembler* masm) {
// Lookup the function in the JavaScript frame.
__ LoadP(r3, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
{
FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
// Pass function as argument.
__ push(r3);
__ CallRuntime(Runtime::kCompileForOnStackReplacement, 1);
}
// If the code object is null, just return to the unoptimized code.
Label skip;
__ CmpSmiLiteral(r3, Smi::FromInt(0), r0);
__ bne(&skip);
__ Ret();
__ bind(&skip);
// Load deoptimization data from the code object.
// <deopt_data> = <code>[#deoptimization_data_offset]
__ LoadP(r4, FieldMemOperand(r3, Code::kDeoptimizationDataOffset));
{
ConstantPoolUnavailableScope constant_pool_unavailable(masm);
__ addi(r3, r3, Operand(Code::kHeaderSize - kHeapObjectTag)); // Code start
if (FLAG_enable_embedded_constant_pool) {
__ LoadConstantPoolPointerRegisterFromCodeTargetAddress(r3);
}
// Load the OSR entrypoint offset from the deoptimization data.
// <osr_offset> = <deopt_data>[#header_size + #osr_pc_offset]
__ LoadP(r4, FieldMemOperand(
r4, FixedArray::OffsetOfElementAt(
DeoptimizationInputData::kOsrPcOffsetIndex)));
__ SmiUntag(r4);
// Compute the target address = code start + osr_offset
__ add(r0, r3, r4);
// And "return" to the OSR entry point of the function.
__ mtlr(r0);
__ blr();
}
}
void Builtins::Generate_OsrAfterStackCheck(MacroAssembler* masm) {
// We check the stack limit as indicator that recompilation might be done.
Label ok;
__ LoadRoot(ip, Heap::kStackLimitRootIndex);
__ cmpl(sp, ip);
__ bge(&ok);
{
FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
__ CallRuntime(Runtime::kStackGuard, 0);
}
__ Jump(masm->isolate()->builtins()->OnStackReplacement(),
RelocInfo::CODE_TARGET);
__ bind(&ok);
__ Ret();
}
void Builtins::Generate_FunctionCall(MacroAssembler* masm) {
// 1. Make sure we have at least one argument.
// r3: actual number of arguments
{
Label done;
__ cmpi(r3, Operand::Zero());
__ bne(&done);
__ LoadRoot(r5, Heap::kUndefinedValueRootIndex);
__ push(r5);
__ addi(r3, r3, Operand(1));
__ bind(&done);
}
// 2. Get the function to call (passed as receiver) from the stack, check
// if it is a function.
// r3: actual number of arguments
Label slow, non_function;
__ ShiftLeftImm(r4, r3, Operand(kPointerSizeLog2));
__ add(r4, sp, r4);
__ LoadP(r4, MemOperand(r4));
__ JumpIfSmi(r4, &non_function);
__ CompareObjectType(r4, r5, r5, JS_FUNCTION_TYPE);
__ bne(&slow);
// 3a. Patch the first argument if necessary when calling a function.
// r3: actual number of arguments
// r4: function
Label shift_arguments;
__ li(r7, Operand::Zero()); // indicate regular JS_FUNCTION
{
Label convert_to_object, use_global_proxy, patch_receiver;
// Change context eagerly in case we need the global receiver.
__ LoadP(cp, FieldMemOperand(r4, JSFunction::kContextOffset));
// Do not transform the receiver for strict mode functions.
__ LoadP(r5, FieldMemOperand(r4, JSFunction::kSharedFunctionInfoOffset));
__ lwz(r6, FieldMemOperand(r5, SharedFunctionInfo::kCompilerHintsOffset));
__ TestBit(r6,
#if V8_TARGET_ARCH_PPC64
SharedFunctionInfo::kStrictModeFunction,
#else
SharedFunctionInfo::kStrictModeFunction + kSmiTagSize,
#endif
r0);
__ bne(&shift_arguments, cr0);
// Do not transform the receiver for native (Compilerhints already in r6).
__ TestBit(r6,
#if V8_TARGET_ARCH_PPC64
SharedFunctionInfo::kNative,
#else
SharedFunctionInfo::kNative + kSmiTagSize,
#endif
r0);
__ bne(&shift_arguments, cr0);
// Compute the receiver in sloppy mode.
__ ShiftLeftImm(ip, r3, Operand(kPointerSizeLog2));
__ add(r5, sp, ip);
__ LoadP(r5, MemOperand(r5, -kPointerSize));
// r3: actual number of arguments
// r4: function
// r5: first argument
__ JumpIfSmi(r5, &convert_to_object);
__ LoadRoot(r6, Heap::kUndefinedValueRootIndex);
__ cmp(r5, r6);
__ beq(&use_global_proxy);
__ LoadRoot(r6, Heap::kNullValueRootIndex);
__ cmp(r5, r6);
__ beq(&use_global_proxy);
STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE);
__ CompareObjectType(r5, r6, r6, FIRST_SPEC_OBJECT_TYPE);
__ bge(&shift_arguments);
__ bind(&convert_to_object);
{
// Enter an internal frame in order to preserve argument count.
FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
__ SmiTag(r3);
__ Push(r3);
__ mr(r3, r5);
ToObjectStub stub(masm->isolate());
__ CallStub(&stub);
__ mr(r5, r3);
__ pop(r3);
__ SmiUntag(r3);
// Exit the internal frame.
}
// Restore the function to r4, and the flag to r7.
__ ShiftLeftImm(r7, r3, Operand(kPointerSizeLog2));
__ add(r7, sp, r7);
__ LoadP(r4, MemOperand(r7));
__ li(r7, Operand::Zero());
__ b(&patch_receiver);
__ bind(&use_global_proxy);
__ LoadP(r5, ContextOperand(cp, Context::GLOBAL_OBJECT_INDEX));
__ LoadP(r5, FieldMemOperand(r5, GlobalObject::kGlobalProxyOffset));
__ bind(&patch_receiver);
__ ShiftLeftImm(ip, r3, Operand(kPointerSizeLog2));
__ add(r6, sp, ip);
__ StoreP(r5, MemOperand(r6, -kPointerSize));
__ b(&shift_arguments);
}
// 3b. Check for function proxy.
__ bind(&slow);
__ li(r7, Operand(1, RelocInfo::NONE32)); // indicate function proxy
__ cmpi(r5, Operand(JS_FUNCTION_PROXY_TYPE));
__ beq(&shift_arguments);
__ bind(&non_function);
__ li(r7, Operand(2, RelocInfo::NONE32)); // indicate non-function
// 3c. Patch the first argument when calling a non-function. The
// CALL_NON_FUNCTION builtin expects the non-function callee as
// receiver, so overwrite the first argument which will ultimately
// become the receiver.
// r3: actual number of arguments
// r4: function
// r7: call type (0: JS function, 1: function proxy, 2: non-function)
__ ShiftLeftImm(ip, r3, Operand(kPointerSizeLog2));
__ add(r5, sp, ip);
__ StoreP(r4, MemOperand(r5, -kPointerSize));
// 4. Shift arguments and return address one slot down on the stack
// (overwriting the original receiver). Adjust argument count to make
// the original first argument the new receiver.
// r3: actual number of arguments
// r4: function
// r7: call type (0: JS function, 1: function proxy, 2: non-function)
__ bind(&shift_arguments);
{
Label loop;
// Calculate the copy start address (destination). Copy end address is sp.
__ ShiftLeftImm(ip, r3, Operand(kPointerSizeLog2));
__ add(r5, sp, ip);
__ bind(&loop);
__ LoadP(ip, MemOperand(r5, -kPointerSize));
__ StoreP(ip, MemOperand(r5));
__ subi(r5, r5, Operand(kPointerSize));
__ cmp(r5, sp);
__ bne(&loop);
// Adjust the actual number of arguments and remove the top element
// (which is a copy of the last argument).
__ subi(r3, r3, Operand(1));
__ pop();
}
// 5a. Call non-function via tail call to CALL_NON_FUNCTION builtin,
// or a function proxy via CALL_FUNCTION_PROXY.
// r3: actual number of arguments
// r4: function
// r7: call type (0: JS function, 1: function proxy, 2: non-function)
{
Label function, non_proxy;
__ cmpi(r7, Operand::Zero());
__ beq(&function);
// Expected number of arguments is 0 for CALL_NON_FUNCTION.
__ li(r5, Operand::Zero());
__ cmpi(r7, Operand(1));
__ bne(&non_proxy);
__ push(r4); // re-add proxy object as additional argument
__ addi(r3, r3, Operand(1));
__ GetBuiltinFunction(r4, Context::CALL_FUNCTION_PROXY_BUILTIN_INDEX);
__ Jump(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(),
RelocInfo::CODE_TARGET);
__ bind(&non_proxy);
__ GetBuiltinFunction(r4, Context::CALL_NON_FUNCTION_BUILTIN_INDEX);
__ Jump(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(),
RelocInfo::CODE_TARGET);
__ bind(&function);
}
// 5b. Get the code to call from the function and check that the number of
// expected arguments matches what we're providing. If so, jump
// (tail-call) to the code in register ip without checking arguments.
// r3: actual number of arguments
// r4: function
__ LoadP(r6, FieldMemOperand(r4, JSFunction::kSharedFunctionInfoOffset));
__ LoadWordArith(
r5, FieldMemOperand(r6, SharedFunctionInfo::kFormalParameterCountOffset));
#if !V8_TARGET_ARCH_PPC64
__ SmiUntag(r5);
#endif
__ cmp(r5, r3); // Check formal and actual parameter counts.
__ Jump(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(),
RelocInfo::CODE_TARGET, ne);
__ LoadP(ip, FieldMemOperand(r4, JSFunction::kCodeEntryOffset));
ParameterCount expected(0);
__ InvokeCode(ip, expected, expected, JUMP_FUNCTION, NullCallWrapper());
}
static void Generate_PushAppliedArguments(MacroAssembler* masm,
const int argumentsOffset,
const int indexOffset,
const int limitOffset) {
Register receiver = LoadDescriptor::ReceiverRegister();
Register key = LoadDescriptor::NameRegister();
Register slot = LoadDescriptor::SlotRegister();
Register vector = LoadWithVectorDescriptor::VectorRegister();
// Copy all arguments from the array to the stack.
Label entry, loop;
__ LoadP(key, MemOperand(fp, indexOffset));
__ b(&entry);
__ bind(&loop);
__ LoadP(receiver, MemOperand(fp, argumentsOffset));
// Use inline caching to speed up access to arguments.
Code::Kind kinds[] = {Code::KEYED_LOAD_IC};
FeedbackVectorSpec spec(0, 1, kinds);
Handle<TypeFeedbackVector> feedback_vector =
masm->isolate()->factory()->NewTypeFeedbackVector(&spec);
int index = feedback_vector->GetIndex(FeedbackVectorICSlot(0));
__ LoadSmiLiteral(slot, Smi::FromInt(index));
__ Move(vector, feedback_vector);
Handle<Code> ic =
KeyedLoadICStub(masm->isolate(), LoadICState(kNoExtraICState)).GetCode();
__ Call(ic, RelocInfo::CODE_TARGET);
// Push the nth argument.
__ push(r3);
// Update the index on the stack and in register key.
__ LoadP(key, MemOperand(fp, indexOffset));
__ AddSmiLiteral(key, key, Smi::FromInt(1), r0);
__ StoreP(key, MemOperand(fp, indexOffset));
// Test if the copy loop has finished copying all the elements from the
// arguments object.
__ bind(&entry);
__ LoadP(r0, MemOperand(fp, limitOffset));
__ cmp(key, r0);
__ bne(&loop);
// On exit, the pushed arguments count is in r3, untagged
__ SmiUntag(r3, key);
}
// Used by FunctionApply and ReflectApply
static void Generate_ApplyHelper(MacroAssembler* masm, bool targetIsArgument) {
const int kFormalParameters = targetIsArgument ? 3 : 2;
const int kStackSize = kFormalParameters + 1;
{
FrameAndConstantPoolScope frame_scope(masm, StackFrame::INTERNAL);
const int kArgumentsOffset = kFPOnStackSize + kPCOnStackSize;
const int kReceiverOffset = kArgumentsOffset + kPointerSize;
const int kFunctionOffset = kReceiverOffset + kPointerSize;
__ LoadP(r3, MemOperand(fp, kFunctionOffset)); // get the function
__ push(r3);
__ LoadP(r3, MemOperand(fp, kArgumentsOffset)); // get the args array
__ push(r3);
if (targetIsArgument) {
__ InvokeBuiltin(Context::REFLECT_APPLY_PREPARE_BUILTIN_INDEX,
CALL_FUNCTION);
} else {
__ InvokeBuiltin(Context::APPLY_PREPARE_BUILTIN_INDEX, CALL_FUNCTION);
}
Generate_CheckStackOverflow(masm, kFunctionOffset, r3, kArgcIsSmiTagged);
// Push current limit and index.
const int kIndexOffset =
StandardFrameConstants::kExpressionsOffset - (2 * kPointerSize);
const int kLimitOffset =
StandardFrameConstants::kExpressionsOffset - (1 * kPointerSize);
__ li(r4, Operand::Zero());
__ Push(r3, r4); // limit and initial index.
// Get the receiver.
__ LoadP(r3, MemOperand(fp, kReceiverOffset));
// Check that the function is a JS function (otherwise it must be a proxy).
Label push_receiver;
__ LoadP(r4, MemOperand(fp, kFunctionOffset));
__ CompareObjectType(r4, r5, r5, JS_FUNCTION_TYPE);
__ bne(&push_receiver);
// Change context eagerly to get the right global object if necessary.
__ LoadP(cp, FieldMemOperand(r4, JSFunction::kContextOffset));
// Load the shared function info while the function is still in r4.
__ LoadP(r5, FieldMemOperand(r4, JSFunction::kSharedFunctionInfoOffset));
// Compute the receiver.
// Do not transform the receiver for strict mode functions.
Label call_to_object, use_global_proxy;
__ lwz(r5, FieldMemOperand(r5, SharedFunctionInfo::kCompilerHintsOffset));
__ TestBit(r5,
#if V8_TARGET_ARCH_PPC64
SharedFunctionInfo::kStrictModeFunction,
#else
SharedFunctionInfo::kStrictModeFunction + kSmiTagSize,
#endif
r0);
__ bne(&push_receiver, cr0);
// Do not transform the receiver for strict mode functions.
__ TestBit(r5,
#if V8_TARGET_ARCH_PPC64
SharedFunctionInfo::kNative,
#else
SharedFunctionInfo::kNative + kSmiTagSize,
#endif
r0);
__ bne(&push_receiver, cr0);
// Compute the receiver in sloppy mode.
__ JumpIfSmi(r3, &call_to_object);
__ LoadRoot(r4, Heap::kNullValueRootIndex);
__ cmp(r3, r4);
__ beq(&use_global_proxy);
__ LoadRoot(r4, Heap::kUndefinedValueRootIndex);
__ cmp(r3, r4);
__ beq(&use_global_proxy);
// Check if the receiver is already a JavaScript object.
// r3: receiver
STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE);
__ CompareObjectType(r3, r4, r4, FIRST_SPEC_OBJECT_TYPE);
__ bge(&push_receiver);
// Convert the receiver to a regular object.
// r3: receiver
__ bind(&call_to_object);
ToObjectStub stub(masm->isolate());
__ CallStub(&stub);
__ b(&push_receiver);
__ bind(&use_global_proxy);
__ LoadP(r3, ContextOperand(cp, Context::GLOBAL_OBJECT_INDEX));
__ LoadP(r3, FieldMemOperand(r3, GlobalObject::kGlobalProxyOffset));
// Push the receiver.
// r3: receiver
__ bind(&push_receiver);
__ push(r3);
// Copy all arguments from the array to the stack.
Generate_PushAppliedArguments(masm, kArgumentsOffset, kIndexOffset,
kLimitOffset);
// Call the function.
Label call_proxy;
ParameterCount actual(r3);
__ LoadP(r4, MemOperand(fp, kFunctionOffset));
__ CompareObjectType(r4, r5, r5, JS_FUNCTION_TYPE);
__ bne(&call_proxy);
__ InvokeFunction(r4, actual, CALL_FUNCTION, NullCallWrapper());
__ LeaveFrame(StackFrame::INTERNAL, kStackSize * kPointerSize);
__ blr();
// Call the function proxy.
__ bind(&call_proxy);
__ push(r4); // add function proxy as last argument
__ addi(r3, r3, Operand(1));
__ li(r5, Operand::Zero());
__ GetBuiltinFunction(r4, Context::CALL_FUNCTION_PROXY_BUILTIN_INDEX);
__ Call(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(),
RelocInfo::CODE_TARGET);
// Tear down the internal frame and remove function, receiver and args.
}
__ addi(sp, sp, Operand(kStackSize * kPointerSize));
__ blr();
}
static void Generate_ConstructHelper(MacroAssembler* masm) {
const int kFormalParameters = 3;
const int kStackSize = kFormalParameters + 1;
{
FrameAndConstantPoolScope frame_scope(masm, StackFrame::INTERNAL);
const int kNewTargetOffset = kFPOnStackSize + kPCOnStackSize;
const int kArgumentsOffset = kNewTargetOffset + kPointerSize;
const int kFunctionOffset = kArgumentsOffset + kPointerSize;
// If newTarget is not supplied, set it to constructor
Label validate_arguments;
__ LoadP(r3, MemOperand(fp, kNewTargetOffset));
__ CompareRoot(r3, Heap::kUndefinedValueRootIndex);
__ bne(&validate_arguments);
__ LoadP(r3, MemOperand(fp, kFunctionOffset));
__ StoreP(r3, MemOperand(fp, kNewTargetOffset));
// Validate arguments
__ bind(&validate_arguments);
__ LoadP(r3, MemOperand(fp, kFunctionOffset)); // get the function
__ push(r3);
__ LoadP(r3, MemOperand(fp, kArgumentsOffset)); // get the args array
__ push(r3);
__ LoadP(r3, MemOperand(fp, kNewTargetOffset)); // get the new.target
__ push(r3);
__ InvokeBuiltin(Context::REFLECT_CONSTRUCT_PREPARE_BUILTIN_INDEX,
CALL_FUNCTION);
Generate_CheckStackOverflow(masm, kFunctionOffset, r3, kArgcIsSmiTagged);
// Push current limit and index.
const int kIndexOffset =
StandardFrameConstants::kExpressionsOffset - (2 * kPointerSize);
const int kLimitOffset =
StandardFrameConstants::kExpressionsOffset - (1 * kPointerSize);
__ li(r4, Operand::Zero());
__ Push(r3, r4); // limit and initial index.
// Push the constructor function as callee
__ LoadP(r3, MemOperand(fp, kFunctionOffset));
__ push(r3);
// Copy all arguments from the array to the stack.
Generate_PushAppliedArguments(masm, kArgumentsOffset, kIndexOffset,
kLimitOffset);
// Use undefined feedback vector
__ LoadRoot(r5, Heap::kUndefinedValueRootIndex);
__ LoadP(r4, MemOperand(fp, kFunctionOffset));
__ LoadP(r7, MemOperand(fp, kNewTargetOffset));
// Call the function.
CallConstructStub stub(masm->isolate(), SUPER_CONSTRUCTOR_CALL);
__ Call(stub.GetCode(), RelocInfo::CONSTRUCT_CALL);
// Leave internal frame.
}
__ addi(sp, sp, Operand(kStackSize * kPointerSize));
__ blr();
}
void Builtins::Generate_FunctionApply(MacroAssembler* masm) {
Generate_ApplyHelper(masm, false);
}
void Builtins::Generate_ReflectApply(MacroAssembler* masm) {
Generate_ApplyHelper(masm, true);
}
void Builtins::Generate_ReflectConstruct(MacroAssembler* masm) {
Generate_ConstructHelper(masm);
}
static void ArgumentAdaptorStackCheck(MacroAssembler* masm,
Label* stack_overflow) {
// ----------- S t a t e -------------
// -- r3 : actual number of arguments
// -- r4 : function (passed through to callee)
// -- r5 : expected number of arguments
// -----------------------------------
// Check the stack for overflow. We are not trying to catch
// interruptions (e.g. debug break and preemption) here, so the "real stack
// limit" is checked.
__ LoadRoot(r8, Heap::kRealStackLimitRootIndex);
// Make r8 the space we have left. The stack might already be overflowed
// here which will cause r8 to become negative.
__ sub(r8, sp, r8);
// Check if the arguments will overflow the stack.
__ ShiftLeftImm(r0, r5, Operand(kPointerSizeLog2));
__ cmp(r8, r0);
__ ble(stack_overflow); // Signed comparison.
}
static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) {
__ SmiTag(r3);
__ LoadSmiLiteral(r7, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR));
__ mflr(r0);
__ push(r0);
if (FLAG_enable_embedded_constant_pool) {
__ Push(fp, kConstantPoolRegister, r7, r4, r3);
} else {
__ Push(fp, r7, r4, r3);
}
__ addi(fp, sp, Operand(StandardFrameConstants::kFixedFrameSizeFromFp +
kPointerSize));
}
static void LeaveArgumentsAdaptorFrame(MacroAssembler* masm) {
// ----------- S t a t e -------------
// -- r3 : result being passed through
// -----------------------------------
// Get the number of arguments passed (as a smi), tear down the frame and
// then tear down the parameters.
__ LoadP(r4, MemOperand(fp, -(StandardFrameConstants::kFixedFrameSizeFromFp +
kPointerSize)));
int stack_adjustment = kPointerSize; // adjust for receiver
__ LeaveFrame(StackFrame::ARGUMENTS_ADAPTOR, stack_adjustment);
__ SmiToPtrArrayOffset(r0, r4);
__ add(sp, sp, r0);
}
void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) {
// ----------- S t a t e -------------
// -- r3 : actual number of arguments
// -- r4 : function (passed through to callee)
// -- r5 : expected number of arguments
// -----------------------------------
Label stack_overflow;
ArgumentAdaptorStackCheck(masm, &stack_overflow);
Label invoke, dont_adapt_arguments;
Label enough, too_few;
__ LoadP(ip, FieldMemOperand(r4, JSFunction::kCodeEntryOffset));
__ cmp(r3, r5);
__ blt(&too_few);
__ cmpi(r5, Operand(SharedFunctionInfo::kDontAdaptArgumentsSentinel));
__ beq(&dont_adapt_arguments);
{ // Enough parameters: actual >= expected
__ bind(&enough);
EnterArgumentsAdaptorFrame(masm);
// Calculate copy start address into r3 and copy end address into r5.
// r3: actual number of arguments as a smi
// r4: function
// r5: expected number of arguments
// ip: code entry to call
__ SmiToPtrArrayOffset(r3, r3);
__ add(r3, r3, fp);
// adjust for return address and receiver
__ addi(r3, r3, Operand(2 * kPointerSize));
__ ShiftLeftImm(r5, r5, Operand(kPointerSizeLog2));
__ sub(r5, r3, r5);
// Copy the arguments (including the receiver) to the new stack frame.
// r3: copy start address
// r4: function
// r5: copy end address
// ip: code entry to call
Label copy;
__ bind(&copy);
__ LoadP(r0, MemOperand(r3, 0));
__ push(r0);
__ cmp(r3, r5); // Compare before moving to next argument.
__ subi(r3, r3, Operand(kPointerSize));
__ bne(&copy);
__ b(&invoke);
}
{ // Too few parameters: Actual < expected
__ bind(&too_few);
// If the function is strong we need to throw an error.
Label no_strong_error;
__ LoadP(r7, FieldMemOperand(r4, JSFunction::kSharedFunctionInfoOffset));
__ lwz(r8, FieldMemOperand(r7, SharedFunctionInfo::kCompilerHintsOffset));
__ TestBit(r8,
#if V8_TARGET_ARCH_PPC64
SharedFunctionInfo::kStrongModeFunction,
#else
SharedFunctionInfo::kStrongModeFunction + kSmiTagSize,
#endif
r0);
__ beq(&no_strong_error, cr0);
// What we really care about is the required number of arguments.
__ lwz(r7, FieldMemOperand(r7, SharedFunctionInfo::kLengthOffset));
#if V8_TARGET_ARCH_PPC64
// See commment near kLenghtOffset in src/objects.h
__ srawi(r7, r7, kSmiTagSize);
#else
__ SmiUntag(r7);
#endif
__ cmp(r3, r7);
__ bge(&no_strong_error);
{
FrameScope frame(masm, StackFrame::MANUAL);
EnterArgumentsAdaptorFrame(masm);
__ CallRuntime(Runtime::kThrowStrongModeTooFewArguments, 0);
}
__ bind(&no_strong_error);
EnterArgumentsAdaptorFrame(masm);
// Calculate copy start address into r0 and copy end address is fp.
// r3: actual number of arguments as a smi
// r4: function
// r5: expected number of arguments
// ip: code entry to call
__ SmiToPtrArrayOffset(r3, r3);
__ add(r3, r3, fp);
// Copy the arguments (including the receiver) to the new stack frame.
// r3: copy start address
// r4: function
// r5: expected number of arguments
// ip: code entry to call
Label copy;
__ bind(&copy);
// Adjust load for return address and receiver.
__ LoadP(r0, MemOperand(r3, 2 * kPointerSize));
__ push(r0);
__ cmp(r3, fp); // Compare before moving to next argument.
__ subi(r3, r3, Operand(kPointerSize));
__ bne(&copy);
// Fill the remaining expected arguments with undefined.
// r4: function
// r5: expected number of arguments
// ip: code entry to call
__ LoadRoot(r0, Heap::kUndefinedValueRootIndex);
__ ShiftLeftImm(r5, r5, Operand(kPointerSizeLog2));
__ sub(r5, fp, r5);
// Adjust for frame.
__ subi(r5, r5, Operand(StandardFrameConstants::kFixedFrameSizeFromFp +
2 * kPointerSize));
Label fill;
__ bind(&fill);
__ push(r0);
__ cmp(sp, r5);
__ bne(&fill);
}
// Call the entry point.
__ bind(&invoke);
__ CallJSEntry(ip);
// Store offset of return address for deoptimizer.
masm->isolate()->heap()->SetArgumentsAdaptorDeoptPCOffset(masm->pc_offset());
// Exit frame and return.
LeaveArgumentsAdaptorFrame(masm);
__ blr();
// -------------------------------------------
// Dont adapt arguments.
// -------------------------------------------
__ bind(&dont_adapt_arguments);
__ JumpToJSEntry(ip);
__ bind(&stack_overflow);
{
FrameScope frame(masm, StackFrame::MANUAL);
EnterArgumentsAdaptorFrame(masm);
__ InvokeBuiltin(Context::STACK_OVERFLOW_BUILTIN_INDEX, CALL_FUNCTION);
__ bkpt(0);
}
}
#undef __
} // namespace internal
} // namespace v8
#endif // V8_TARGET_ARCH_PPC