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1628 lines
57 KiB
1628 lines
57 KiB
// Copyright 2011 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "v8.h"
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#if defined(V8_TARGET_ARCH_MIPS)
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#include "codegen.h"
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#include "debug.h"
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#include "deoptimizer.h"
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#include "full-codegen.h"
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#include "runtime.h"
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namespace v8 {
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namespace internal {
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#define __ ACCESS_MASM(masm)
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void Builtins::Generate_Adaptor(MacroAssembler* masm,
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CFunctionId id,
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BuiltinExtraArguments extra_args) {
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// ----------- S t a t e -------------
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// -- a0 : number of arguments excluding receiver
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// -- a1 : called function (only guaranteed when
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// -- extra_args requires it)
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// -- cp : context
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// -- sp[0] : last argument
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// -- ...
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// -- sp[4 * (argc - 1)] : first argument
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// -- sp[4 * agrc] : receiver
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// -----------------------------------
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// Insert extra arguments.
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int num_extra_args = 0;
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if (extra_args == NEEDS_CALLED_FUNCTION) {
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num_extra_args = 1;
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__ push(a1);
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} else {
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ASSERT(extra_args == NO_EXTRA_ARGUMENTS);
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}
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// JumpToExternalReference expects a0 to contain the number of arguments
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// including the receiver and the extra arguments.
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__ Addu(a0, a0, Operand(num_extra_args + 1));
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__ JumpToExternalReference(ExternalReference(id, masm->isolate()));
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}
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// Load the built-in Array function from the current context.
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static void GenerateLoadArrayFunction(MacroAssembler* masm, Register result) {
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// Load the global context.
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__ lw(result, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_INDEX)));
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__ lw(result,
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FieldMemOperand(result, GlobalObject::kGlobalContextOffset));
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// Load the Array function from the global context.
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__ lw(result,
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MemOperand(result,
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Context::SlotOffset(Context::ARRAY_FUNCTION_INDEX)));
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}
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// This constant has the same value as JSArray::kPreallocatedArrayElements and
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// if JSArray::kPreallocatedArrayElements is changed handling of loop unfolding
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// below should be reconsidered.
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static const int kLoopUnfoldLimit = 4;
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// Allocate an empty JSArray. The allocated array is put into the result
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// register. An elements backing store is allocated with size initial_capacity
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// and filled with the hole values.
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static void AllocateEmptyJSArray(MacroAssembler* masm,
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Register array_function,
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Register result,
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Register scratch1,
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Register scratch2,
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Register scratch3,
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int initial_capacity,
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Label* gc_required) {
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ASSERT(initial_capacity > 0);
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// Load the initial map from the array function.
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__ lw(scratch1, FieldMemOperand(array_function,
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JSFunction::kPrototypeOrInitialMapOffset));
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// Allocate the JSArray object together with space for a fixed array with the
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// requested elements.
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int size = JSArray::kSize + FixedArray::SizeFor(initial_capacity);
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__ AllocateInNewSpace(size,
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result,
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scratch2,
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scratch3,
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gc_required,
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TAG_OBJECT);
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// Allocated the JSArray. Now initialize the fields except for the elements
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// array.
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// result: JSObject
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// scratch1: initial map
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// scratch2: start of next object
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__ sw(scratch1, FieldMemOperand(result, JSObject::kMapOffset));
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__ LoadRoot(scratch1, Heap::kEmptyFixedArrayRootIndex);
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__ sw(scratch1, FieldMemOperand(result, JSArray::kPropertiesOffset));
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// Field JSArray::kElementsOffset is initialized later.
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__ mov(scratch3, zero_reg);
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__ sw(scratch3, FieldMemOperand(result, JSArray::kLengthOffset));
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// Calculate the location of the elements array and set elements array member
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// of the JSArray.
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// result: JSObject
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// scratch2: start of next object
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__ Addu(scratch1, result, Operand(JSArray::kSize));
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__ sw(scratch1, FieldMemOperand(result, JSArray::kElementsOffset));
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// Clear the heap tag on the elements array.
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__ And(scratch1, scratch1, Operand(~kHeapObjectTagMask));
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// Initialize the FixedArray and fill it with holes. FixedArray length is
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// stored as a smi.
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// result: JSObject
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// scratch1: elements array (untagged)
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// scratch2: start of next object
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__ LoadRoot(scratch3, Heap::kFixedArrayMapRootIndex);
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ASSERT_EQ(0 * kPointerSize, FixedArray::kMapOffset);
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__ sw(scratch3, MemOperand(scratch1));
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__ Addu(scratch1, scratch1, kPointerSize);
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__ li(scratch3, Operand(Smi::FromInt(initial_capacity)));
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ASSERT_EQ(1 * kPointerSize, FixedArray::kLengthOffset);
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__ sw(scratch3, MemOperand(scratch1));
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__ Addu(scratch1, scratch1, kPointerSize);
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// Fill the FixedArray with the hole value.
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ASSERT_EQ(2 * kPointerSize, FixedArray::kHeaderSize);
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ASSERT(initial_capacity <= kLoopUnfoldLimit);
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__ LoadRoot(scratch3, Heap::kTheHoleValueRootIndex);
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for (int i = 0; i < initial_capacity; i++) {
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__ sw(scratch3, MemOperand(scratch1));
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__ Addu(scratch1, scratch1, kPointerSize);
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}
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}
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// Allocate a JSArray with the number of elements stored in a register. The
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// register array_function holds the built-in Array function and the register
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// array_size holds the size of the array as a smi. The allocated array is put
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// into the result register and beginning and end of the FixedArray elements
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// storage is put into registers elements_array_storage and elements_array_end
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// (see below for when that is not the case). If the parameter fill_with_holes
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// is true the allocated elements backing store is filled with the hole values
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// otherwise it is left uninitialized. When the backing store is filled the
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// register elements_array_storage is scratched.
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static void AllocateJSArray(MacroAssembler* masm,
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Register array_function, // Array function.
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Register array_size, // As a smi.
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Register result,
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Register elements_array_storage,
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Register elements_array_end,
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Register scratch1,
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Register scratch2,
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bool fill_with_hole,
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Label* gc_required) {
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Label not_empty, allocated;
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// Load the initial map from the array function.
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__ lw(elements_array_storage,
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FieldMemOperand(array_function,
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JSFunction::kPrototypeOrInitialMapOffset));
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// Check whether an empty sized array is requested.
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__ Branch(¬_empty, ne, array_size, Operand(zero_reg));
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// If an empty array is requested allocate a small elements array anyway. This
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// keeps the code below free of special casing for the empty array.
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int size = JSArray::kSize +
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FixedArray::SizeFor(JSArray::kPreallocatedArrayElements);
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__ AllocateInNewSpace(size,
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result,
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elements_array_end,
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scratch1,
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gc_required,
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TAG_OBJECT);
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__ Branch(&allocated);
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// Allocate the JSArray object together with space for a FixedArray with the
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// requested number of elements.
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__ bind(¬_empty);
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ASSERT(kSmiTagSize == 1 && kSmiTag == 0);
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__ li(elements_array_end,
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(JSArray::kSize + FixedArray::kHeaderSize) / kPointerSize);
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__ sra(scratch1, array_size, kSmiTagSize);
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__ Addu(elements_array_end, elements_array_end, scratch1);
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__ AllocateInNewSpace(
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elements_array_end,
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result,
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scratch1,
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scratch2,
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gc_required,
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static_cast<AllocationFlags>(TAG_OBJECT | SIZE_IN_WORDS));
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// Allocated the JSArray. Now initialize the fields except for the elements
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// array.
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// result: JSObject
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// elements_array_storage: initial map
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// array_size: size of array (smi)
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__ bind(&allocated);
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__ sw(elements_array_storage, FieldMemOperand(result, JSObject::kMapOffset));
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__ LoadRoot(elements_array_storage, Heap::kEmptyFixedArrayRootIndex);
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__ sw(elements_array_storage,
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FieldMemOperand(result, JSArray::kPropertiesOffset));
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// Field JSArray::kElementsOffset is initialized later.
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__ sw(array_size, FieldMemOperand(result, JSArray::kLengthOffset));
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// Calculate the location of the elements array and set elements array member
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// of the JSArray.
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// result: JSObject
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// array_size: size of array (smi)
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__ Addu(elements_array_storage, result, Operand(JSArray::kSize));
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__ sw(elements_array_storage,
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FieldMemOperand(result, JSArray::kElementsOffset));
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// Clear the heap tag on the elements array.
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__ And(elements_array_storage,
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elements_array_storage,
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Operand(~kHeapObjectTagMask));
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// Initialize the fixed array and fill it with holes. FixedArray length is
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// stored as a smi.
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// result: JSObject
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// elements_array_storage: elements array (untagged)
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// array_size: size of array (smi)
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__ LoadRoot(scratch1, Heap::kFixedArrayMapRootIndex);
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ASSERT_EQ(0 * kPointerSize, FixedArray::kMapOffset);
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__ sw(scratch1, MemOperand(elements_array_storage));
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__ Addu(elements_array_storage, elements_array_storage, kPointerSize);
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// Length of the FixedArray is the number of pre-allocated elements if
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// the actual JSArray has length 0 and the size of the JSArray for non-empty
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// JSArrays. The length of a FixedArray is stored as a smi.
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ASSERT(kSmiTag == 0);
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__ li(at, Operand(Smi::FromInt(JSArray::kPreallocatedArrayElements)));
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__ movz(array_size, at, array_size);
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ASSERT_EQ(1 * kPointerSize, FixedArray::kLengthOffset);
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__ sw(array_size, MemOperand(elements_array_storage));
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__ Addu(elements_array_storage, elements_array_storage, kPointerSize);
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// Calculate elements array and elements array end.
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// result: JSObject
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// elements_array_storage: elements array element storage
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// array_size: smi-tagged size of elements array
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ASSERT(kSmiTag == 0 && kSmiTagSize < kPointerSizeLog2);
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__ sll(elements_array_end, array_size, kPointerSizeLog2 - kSmiTagSize);
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__ Addu(elements_array_end, elements_array_storage, elements_array_end);
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// Fill the allocated FixedArray with the hole value if requested.
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// result: JSObject
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// elements_array_storage: elements array element storage
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// elements_array_end: start of next object
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if (fill_with_hole) {
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Label loop, entry;
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__ LoadRoot(scratch1, Heap::kTheHoleValueRootIndex);
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__ Branch(&entry);
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__ bind(&loop);
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__ sw(scratch1, MemOperand(elements_array_storage));
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__ Addu(elements_array_storage, elements_array_storage, kPointerSize);
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__ bind(&entry);
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__ Branch(&loop, lt, elements_array_storage, Operand(elements_array_end));
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}
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}
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// Create a new array for the built-in Array function. This function allocates
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// the JSArray object and the FixedArray elements array and initializes these.
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// If the Array cannot be constructed in native code the runtime is called. This
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// function assumes the following state:
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// a0: argc
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// a1: constructor (built-in Array function)
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// ra: return address
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// sp[0]: last argument
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// This function is used for both construct and normal calls of Array. The only
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// difference between handling a construct call and a normal call is that for a
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// construct call the constructor function in a1 needs to be preserved for
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// entering the generic code. In both cases argc in a0 needs to be preserved.
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// Both registers are preserved by this code so no need to differentiate between
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// construct call and normal call.
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static void ArrayNativeCode(MacroAssembler* masm,
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Label* call_generic_code) {
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Counters* counters = masm->isolate()->counters();
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Label argc_one_or_more, argc_two_or_more;
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// Check for array construction with zero arguments or one.
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__ Branch(&argc_one_or_more, ne, a0, Operand(zero_reg));
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// Handle construction of an empty array.
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AllocateEmptyJSArray(masm,
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a1,
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a2,
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a3,
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t0,
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t1,
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JSArray::kPreallocatedArrayElements,
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call_generic_code);
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__ IncrementCounter(counters->array_function_native(), 1, a3, t0);
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// Setup return value, remove receiver from stack and return.
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__ mov(v0, a2);
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__ Addu(sp, sp, Operand(kPointerSize));
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__ Ret();
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// Check for one argument. Bail out if argument is not smi or if it is
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// negative.
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__ bind(&argc_one_or_more);
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__ Branch(&argc_two_or_more, ne, a0, Operand(1));
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ASSERT(kSmiTag == 0);
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__ lw(a2, MemOperand(sp)); // Get the argument from the stack.
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__ And(a3, a2, Operand(kIntptrSignBit | kSmiTagMask));
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__ Branch(call_generic_code, eq, a3, Operand(zero_reg));
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// Handle construction of an empty array of a certain size. Bail out if size
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// is too large to actually allocate an elements array.
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ASSERT(kSmiTag == 0);
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__ Branch(call_generic_code, Ugreater_equal, a2,
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Operand(JSObject::kInitialMaxFastElementArray << kSmiTagSize));
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// a0: argc
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// a1: constructor
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// a2: array_size (smi)
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// sp[0]: argument
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AllocateJSArray(masm,
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a1,
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a2,
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a3,
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t0,
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t1,
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t2,
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t3,
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true,
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call_generic_code);
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__ IncrementCounter(counters->array_function_native(), 1, a2, t0);
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// Setup return value, remove receiver and argument from stack and return.
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__ mov(v0, a3);
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__ Addu(sp, sp, Operand(2 * kPointerSize));
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__ Ret();
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// Handle construction of an array from a list of arguments.
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__ bind(&argc_two_or_more);
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__ sll(a2, a0, kSmiTagSize); // Convert argc to a smi.
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// a0: argc
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// a1: constructor
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// a2: array_size (smi)
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// sp[0]: last argument
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AllocateJSArray(masm,
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a1,
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a2,
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a3,
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t0,
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t1,
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t2,
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t3,
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false,
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call_generic_code);
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__ IncrementCounter(counters->array_function_native(), 1, a2, t2);
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// Fill arguments as array elements. Copy from the top of the stack (last
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// element) to the array backing store filling it backwards. Note:
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// elements_array_end points after the backing store.
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// a0: argc
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// a3: JSArray
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// t0: elements_array storage start (untagged)
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// t1: elements_array_end (untagged)
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// sp[0]: last argument
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Label loop, entry;
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__ Branch(&entry);
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__ bind(&loop);
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__ pop(a2);
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__ Addu(t1, t1, -kPointerSize);
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__ sw(a2, MemOperand(t1));
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__ bind(&entry);
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__ Branch(&loop, lt, t0, Operand(t1));
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|
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// Remove caller arguments and receiver from the stack, setup return value and
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// return.
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// a0: argc
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// a3: JSArray
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// sp[0]: receiver
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__ Addu(sp, sp, Operand(kPointerSize));
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__ mov(v0, a3);
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__ Ret();
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}
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void Builtins::Generate_ArrayCode(MacroAssembler* masm) {
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// ----------- S t a t e -------------
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// -- a0 : number of arguments
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// -- ra : return address
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// -- sp[...]: constructor arguments
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// -----------------------------------
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Label generic_array_code;
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// Get the Array function.
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GenerateLoadArrayFunction(masm, a1);
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if (FLAG_debug_code) {
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// Initial map for the builtin Array functions should be maps.
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__ lw(a2, FieldMemOperand(a1, JSFunction::kPrototypeOrInitialMapOffset));
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__ And(t0, a2, Operand(kSmiTagMask));
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__ Assert(ne, "Unexpected initial map for Array function (1)",
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t0, Operand(zero_reg));
|
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__ GetObjectType(a2, a3, t0);
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|
__ Assert(eq, "Unexpected initial map for Array function (2)",
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t0, Operand(MAP_TYPE));
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}
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|
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// Run the native code for the Array function called as a normal function.
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ArrayNativeCode(masm, &generic_array_code);
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|
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// Jump to the generic array code if the specialized code cannot handle
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// the construction.
|
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__ bind(&generic_array_code);
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Handle<Code> array_code =
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masm->isolate()->builtins()->ArrayCodeGeneric();
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__ Jump(array_code, RelocInfo::CODE_TARGET);
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}
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void Builtins::Generate_ArrayConstructCode(MacroAssembler* masm) {
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|
// ----------- S t a t e -------------
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// -- a0 : number of arguments
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|
// -- a1 : constructor function
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// -- ra : return address
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|
// -- sp[...]: constructor arguments
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|
// -----------------------------------
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|
Label generic_constructor;
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|
|
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if (FLAG_debug_code) {
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|
// The array construct code is only set for the builtin and internal
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|
// Array functions which always have a map.
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|
// Initial map for the builtin Array function should be a map.
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|
__ lw(a2, FieldMemOperand(a1, JSFunction::kPrototypeOrInitialMapOffset));
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__ And(t0, a2, Operand(kSmiTagMask));
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|
__ Assert(ne, "Unexpected initial map for Array function (3)",
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|
t0, Operand(zero_reg));
|
|
__ GetObjectType(a2, a3, t0);
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|
__ Assert(eq, "Unexpected initial map for Array function (4)",
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|
t0, Operand(MAP_TYPE));
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|
}
|
|
|
|
// Run the native code for the Array function called as a constructor.
|
|
ArrayNativeCode(masm, &generic_constructor);
|
|
|
|
// Jump to the generic construct code in case the specialized code cannot
|
|
// handle the construction.
|
|
__ bind(&generic_constructor);
|
|
|
|
Handle<Code> generic_construct_stub =
|
|
masm->isolate()->builtins()->JSConstructStubGeneric();
|
|
__ Jump(generic_construct_stub, RelocInfo::CODE_TARGET);
|
|
}
|
|
|
|
|
|
void Builtins::Generate_StringConstructCode(MacroAssembler* masm) {
|
|
// ----------- S t a t e -------------
|
|
// -- a0 : number of arguments
|
|
// -- a1 : constructor function
|
|
// -- ra : 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, a2, a3);
|
|
|
|
Register function = a1;
|
|
if (FLAG_debug_code) {
|
|
__ LoadGlobalFunction(Context::STRING_FUNCTION_INDEX, a2);
|
|
__ Assert(eq, "Unexpected String function", function, Operand(a2));
|
|
}
|
|
|
|
// Load the first arguments in a0 and get rid of the rest.
|
|
Label no_arguments;
|
|
__ Branch(&no_arguments, eq, a0, Operand(zero_reg));
|
|
// First args = sp[(argc - 1) * 4].
|
|
__ Subu(a0, a0, Operand(1));
|
|
__ sll(a0, a0, kPointerSizeLog2);
|
|
__ Addu(sp, a0, sp);
|
|
__ lw(a0, MemOperand(sp));
|
|
// sp now point to args[0], drop args[0] + receiver.
|
|
__ Drop(2);
|
|
|
|
Register argument = a2;
|
|
Label not_cached, argument_is_string;
|
|
NumberToStringStub::GenerateLookupNumberStringCache(
|
|
masm,
|
|
a0, // Input.
|
|
argument, // Result.
|
|
a3, // Scratch.
|
|
t0, // Scratch.
|
|
t1, // Scratch.
|
|
false, // Is it a Smi?
|
|
¬_cached);
|
|
__ IncrementCounter(counters->string_ctor_cached_number(), 1, a3, t0);
|
|
__ bind(&argument_is_string);
|
|
|
|
// ----------- S t a t e -------------
|
|
// -- a2 : argument converted to string
|
|
// -- a1 : constructor function
|
|
// -- ra : return address
|
|
// -----------------------------------
|
|
|
|
Label gc_required;
|
|
__ AllocateInNewSpace(JSValue::kSize,
|
|
v0, // Result.
|
|
a3, // Scratch.
|
|
t0, // Scratch.
|
|
&gc_required,
|
|
TAG_OBJECT);
|
|
|
|
// Initialising the String Object.
|
|
Register map = a3;
|
|
__ LoadGlobalFunctionInitialMap(function, map, t0);
|
|
if (FLAG_debug_code) {
|
|
__ lbu(t0, FieldMemOperand(map, Map::kInstanceSizeOffset));
|
|
__ Assert(eq, "Unexpected string wrapper instance size",
|
|
t0, Operand(JSValue::kSize >> kPointerSizeLog2));
|
|
__ lbu(t0, FieldMemOperand(map, Map::kUnusedPropertyFieldsOffset));
|
|
__ Assert(eq, "Unexpected unused properties of string wrapper",
|
|
t0, Operand(zero_reg));
|
|
}
|
|
__ sw(map, FieldMemOperand(v0, HeapObject::kMapOffset));
|
|
|
|
__ LoadRoot(a3, Heap::kEmptyFixedArrayRootIndex);
|
|
__ sw(a3, FieldMemOperand(v0, JSObject::kPropertiesOffset));
|
|
__ sw(a3, FieldMemOperand(v0, JSObject::kElementsOffset));
|
|
|
|
__ sw(argument, FieldMemOperand(v0, JSValue::kValueOffset));
|
|
|
|
// 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(¬_cached);
|
|
__ JumpIfSmi(a0, &convert_argument);
|
|
|
|
// Is it a String?
|
|
__ lw(a2, FieldMemOperand(a0, HeapObject::kMapOffset));
|
|
__ lbu(a3, FieldMemOperand(a2, Map::kInstanceTypeOffset));
|
|
ASSERT(kNotStringTag != 0);
|
|
__ And(t0, a3, Operand(kIsNotStringMask));
|
|
__ Branch(&convert_argument, ne, t0, Operand(zero_reg));
|
|
__ mov(argument, a0);
|
|
__ IncrementCounter(counters->string_ctor_conversions(), 1, a3, t0);
|
|
__ Branch(&argument_is_string);
|
|
|
|
// Invoke the conversion builtin and put the result into a2.
|
|
__ bind(&convert_argument);
|
|
__ push(function); // Preserve the function.
|
|
__ IncrementCounter(counters->string_ctor_conversions(), 1, a3, t0);
|
|
__ EnterInternalFrame();
|
|
__ push(v0);
|
|
__ InvokeBuiltin(Builtins::TO_STRING, CALL_FUNCTION);
|
|
__ LeaveInternalFrame();
|
|
__ pop(function);
|
|
__ mov(argument, v0);
|
|
__ Branch(&argument_is_string);
|
|
|
|
// Load the empty string into a2, remove the receiver from the
|
|
// stack, and jump back to the case where the argument is a string.
|
|
__ bind(&no_arguments);
|
|
__ LoadRoot(argument, Heap::kEmptyStringRootIndex);
|
|
__ Drop(1);
|
|
__ Branch(&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, a3, t0);
|
|
__ EnterInternalFrame();
|
|
__ push(argument);
|
|
__ CallRuntime(Runtime::kNewStringWrapper, 1);
|
|
__ LeaveInternalFrame();
|
|
__ Ret();
|
|
}
|
|
|
|
|
|
void Builtins::Generate_JSConstructCall(MacroAssembler* masm) {
|
|
// ----------- S t a t e -------------
|
|
// -- a0 : number of arguments
|
|
// -- a1 : constructor function
|
|
// -- ra : return address
|
|
// -- sp[...]: constructor arguments
|
|
// -----------------------------------
|
|
|
|
Label non_function_call;
|
|
// Check that the function is not a smi.
|
|
__ And(t0, a1, Operand(kSmiTagMask));
|
|
__ Branch(&non_function_call, eq, t0, Operand(zero_reg));
|
|
// Check that the function is a JSFunction.
|
|
__ GetObjectType(a1, a2, a2);
|
|
__ Branch(&non_function_call, ne, a2, Operand(JS_FUNCTION_TYPE));
|
|
|
|
// Jump to the function-specific construct stub.
|
|
__ lw(a2, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
|
|
__ lw(a2, FieldMemOperand(a2, SharedFunctionInfo::kConstructStubOffset));
|
|
__ Addu(t9, a2, Operand(Code::kHeaderSize - kHeapObjectTag));
|
|
__ Jump(Operand(t9));
|
|
|
|
// a0: number of arguments
|
|
// a1: called object
|
|
__ bind(&non_function_call);
|
|
// CALL_NON_FUNCTION expects the non-function constructor as receiver
|
|
// (instead of the original receiver from the call site). The receiver is
|
|
// stack element argc.
|
|
// Set expected number of arguments to zero (not changing a0).
|
|
__ mov(a2, zero_reg);
|
|
__ GetBuiltinEntry(a3, Builtins::CALL_NON_FUNCTION_AS_CONSTRUCTOR);
|
|
__ SetCallKind(t1, CALL_AS_METHOD);
|
|
__ Jump(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(),
|
|
RelocInfo::CODE_TARGET);
|
|
}
|
|
|
|
|
|
static void Generate_JSConstructStubHelper(MacroAssembler* masm,
|
|
bool is_api_function,
|
|
bool count_constructions) {
|
|
// Should never count constructions for api objects.
|
|
ASSERT(!is_api_function || !count_constructions);
|
|
|
|
Isolate* isolate = masm->isolate();
|
|
|
|
// ----------- S t a t e -------------
|
|
// -- a0 : number of arguments
|
|
// -- a1 : constructor function
|
|
// -- ra : return address
|
|
// -- sp[...]: constructor arguments
|
|
// -----------------------------------
|
|
|
|
// Enter a construct frame.
|
|
__ EnterConstructFrame();
|
|
|
|
// Preserve the two incoming parameters on the stack.
|
|
__ sll(a0, a0, kSmiTagSize); // Tag arguments count.
|
|
__ MultiPushReversed(a0.bit() | a1.bit());
|
|
|
|
// Use t7 to hold undefined, which is used in several places below.
|
|
__ LoadRoot(t7, Heap::kUndefinedValueRootIndex);
|
|
|
|
Label rt_call, allocated;
|
|
// 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.
|
|
if (FLAG_inline_new) {
|
|
Label undo_allocation;
|
|
#ifdef ENABLE_DEBUGGER_SUPPORT
|
|
ExternalReference debug_step_in_fp =
|
|
ExternalReference::debug_step_in_fp_address(isolate);
|
|
__ li(a2, Operand(debug_step_in_fp));
|
|
__ lw(a2, MemOperand(a2));
|
|
__ Branch(&rt_call, ne, a2, Operand(zero_reg));
|
|
#endif
|
|
|
|
// Load the initial map and verify that it is in fact a map.
|
|
// a1: constructor function
|
|
__ lw(a2, FieldMemOperand(a1, JSFunction::kPrototypeOrInitialMapOffset));
|
|
__ And(t0, a2, Operand(kSmiTagMask));
|
|
__ Branch(&rt_call, eq, t0, Operand(zero_reg));
|
|
__ GetObjectType(a2, a3, t4);
|
|
__ Branch(&rt_call, ne, t4, Operand(MAP_TYPE));
|
|
|
|
// 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.
|
|
// a1: constructor function
|
|
// a2: initial map
|
|
__ lbu(a3, FieldMemOperand(a2, Map::kInstanceTypeOffset));
|
|
__ Branch(&rt_call, eq, a3, Operand(JS_FUNCTION_TYPE));
|
|
|
|
if (count_constructions) {
|
|
Label allocate;
|
|
// Decrease generous allocation count.
|
|
__ lw(a3, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
|
|
MemOperand constructor_count =
|
|
FieldMemOperand(a3, SharedFunctionInfo::kConstructionCountOffset);
|
|
__ lbu(t0, constructor_count);
|
|
__ Subu(t0, t0, Operand(1));
|
|
__ sb(t0, constructor_count);
|
|
__ Branch(&allocate, ne, t0, Operand(zero_reg));
|
|
|
|
__ Push(a1, a2);
|
|
|
|
__ push(a1); // Constructor.
|
|
// The call will replace the stub, so the countdown is only done once.
|
|
__ CallRuntime(Runtime::kFinalizeInstanceSize, 1);
|
|
|
|
__ pop(a2);
|
|
__ pop(a1);
|
|
|
|
__ bind(&allocate);
|
|
}
|
|
|
|
// Now allocate the JSObject on the heap.
|
|
// a1: constructor function
|
|
// a2: initial map
|
|
__ lbu(a3, FieldMemOperand(a2, Map::kInstanceSizeOffset));
|
|
__ AllocateInNewSpace(a3, t4, t5, t6, &rt_call, 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.
|
|
// a1: constructor function
|
|
// a2: initial map
|
|
// a3: object size
|
|
// t4: JSObject (not tagged)
|
|
__ LoadRoot(t6, Heap::kEmptyFixedArrayRootIndex);
|
|
__ mov(t5, t4);
|
|
__ sw(a2, MemOperand(t5, JSObject::kMapOffset));
|
|
__ sw(t6, MemOperand(t5, JSObject::kPropertiesOffset));
|
|
__ sw(t6, MemOperand(t5, JSObject::kElementsOffset));
|
|
__ Addu(t5, t5, Operand(3*kPointerSize));
|
|
ASSERT_EQ(0 * kPointerSize, JSObject::kMapOffset);
|
|
ASSERT_EQ(1 * kPointerSize, JSObject::kPropertiesOffset);
|
|
ASSERT_EQ(2 * kPointerSize, JSObject::kElementsOffset);
|
|
|
|
// Fill all the in-object properties with appropriate filler.
|
|
// a1: constructor function
|
|
// a2: initial map
|
|
// a3: object size (in words)
|
|
// t4: JSObject (not tagged)
|
|
// t5: First in-object property of JSObject (not tagged)
|
|
__ sll(t0, a3, kPointerSizeLog2);
|
|
__ addu(t6, t4, t0); // End of object.
|
|
ASSERT_EQ(3 * kPointerSize, JSObject::kHeaderSize);
|
|
{ Label loop, entry;
|
|
if (count_constructions) {
|
|
// To allow for truncation.
|
|
__ LoadRoot(t7, Heap::kOnePointerFillerMapRootIndex);
|
|
} else {
|
|
__ LoadRoot(t7, Heap::kUndefinedValueRootIndex);
|
|
}
|
|
__ jmp(&entry);
|
|
__ bind(&loop);
|
|
__ sw(t7, MemOperand(t5, 0));
|
|
__ addiu(t5, t5, kPointerSize);
|
|
__ bind(&entry);
|
|
__ Branch(&loop, Uless, t5, Operand(t6));
|
|
}
|
|
|
|
// 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. Any failures
|
|
// need to undo the allocation, so that the heap is in a consistent state
|
|
// and verifiable.
|
|
__ Addu(t4, t4, Operand(kHeapObjectTag));
|
|
|
|
// Check if a non-empty properties array is needed. Continue with allocated
|
|
// object if not fall through to runtime call if it is.
|
|
// a1: constructor function
|
|
// t4: JSObject
|
|
// t5: start of next object (not tagged)
|
|
__ lbu(a3, FieldMemOperand(a2, Map::kUnusedPropertyFieldsOffset));
|
|
// The field instance sizes contains both pre-allocated property fields and
|
|
// in-object properties.
|
|
__ lw(a0, FieldMemOperand(a2, Map::kInstanceSizesOffset));
|
|
__ And(t6,
|
|
a0,
|
|
Operand(0x000000FF << Map::kPreAllocatedPropertyFieldsByte * 8));
|
|
__ srl(t0, t6, Map::kPreAllocatedPropertyFieldsByte * 8);
|
|
__ Addu(a3, a3, Operand(t0));
|
|
__ And(t6, a0, Operand(0x000000FF << Map::kInObjectPropertiesByte * 8));
|
|
__ srl(t0, t6, Map::kInObjectPropertiesByte * 8);
|
|
__ subu(a3, a3, t0);
|
|
|
|
// Done if no extra properties are to be allocated.
|
|
__ Branch(&allocated, eq, a3, Operand(zero_reg));
|
|
__ Assert(greater_equal, "Property allocation count failed.",
|
|
a3, Operand(zero_reg));
|
|
|
|
// Scale the number of elements by pointer size and add the header for
|
|
// FixedArrays to the start of the next object calculation from above.
|
|
// a1: constructor
|
|
// a3: number of elements in properties array
|
|
// t4: JSObject
|
|
// t5: start of next object
|
|
__ Addu(a0, a3, Operand(FixedArray::kHeaderSize / kPointerSize));
|
|
__ AllocateInNewSpace(
|
|
a0,
|
|
t5,
|
|
t6,
|
|
a2,
|
|
&undo_allocation,
|
|
static_cast<AllocationFlags>(RESULT_CONTAINS_TOP | SIZE_IN_WORDS));
|
|
|
|
// Initialize the FixedArray.
|
|
// a1: constructor
|
|
// a3: number of elements in properties array (un-tagged)
|
|
// t4: JSObject
|
|
// t5: start of next object
|
|
__ LoadRoot(t6, Heap::kFixedArrayMapRootIndex);
|
|
__ mov(a2, t5);
|
|
__ sw(t6, MemOperand(a2, JSObject::kMapOffset));
|
|
__ sll(a0, a3, kSmiTagSize);
|
|
__ sw(a0, MemOperand(a2, FixedArray::kLengthOffset));
|
|
__ Addu(a2, a2, Operand(2 * kPointerSize));
|
|
|
|
ASSERT_EQ(0 * kPointerSize, JSObject::kMapOffset);
|
|
ASSERT_EQ(1 * kPointerSize, FixedArray::kLengthOffset);
|
|
|
|
// Initialize the fields to undefined.
|
|
// a1: constructor
|
|
// a2: First element of FixedArray (not tagged)
|
|
// a3: number of elements in properties array
|
|
// t4: JSObject
|
|
// t5: FixedArray (not tagged)
|
|
__ sll(t3, a3, kPointerSizeLog2);
|
|
__ addu(t6, a2, t3); // End of object.
|
|
ASSERT_EQ(2 * kPointerSize, FixedArray::kHeaderSize);
|
|
{ Label loop, entry;
|
|
if (count_constructions) {
|
|
__ LoadRoot(t7, Heap::kUndefinedValueRootIndex);
|
|
} else if (FLAG_debug_code) {
|
|
__ LoadRoot(t8, Heap::kUndefinedValueRootIndex);
|
|
__ Assert(eq, "Undefined value not loaded.", t7, Operand(t8));
|
|
}
|
|
__ jmp(&entry);
|
|
__ bind(&loop);
|
|
__ sw(t7, MemOperand(a2));
|
|
__ addiu(a2, a2, kPointerSize);
|
|
__ bind(&entry);
|
|
__ Branch(&loop, less, a2, Operand(t6));
|
|
}
|
|
|
|
// Store the initialized FixedArray into the properties field of
|
|
// the JSObject.
|
|
// a1: constructor function
|
|
// t4: JSObject
|
|
// t5: FixedArray (not tagged)
|
|
__ Addu(t5, t5, Operand(kHeapObjectTag)); // Add the heap tag.
|
|
__ sw(t5, FieldMemOperand(t4, JSObject::kPropertiesOffset));
|
|
|
|
// Continue with JSObject being successfully allocated.
|
|
// a1: constructor function
|
|
// a4: JSObject
|
|
__ jmp(&allocated);
|
|
|
|
// Undo the setting of the new top so that the heap is verifiable. For
|
|
// example, the map's unused properties potentially do not match the
|
|
// allocated objects unused properties.
|
|
// t4: JSObject (previous new top)
|
|
__ bind(&undo_allocation);
|
|
__ UndoAllocationInNewSpace(t4, t5);
|
|
}
|
|
|
|
__ bind(&rt_call);
|
|
// Allocate the new receiver object using the runtime call.
|
|
// a1: constructor function
|
|
__ push(a1); // Argument for Runtime_NewObject.
|
|
__ CallRuntime(Runtime::kNewObject, 1);
|
|
__ mov(t4, v0);
|
|
|
|
// Receiver for constructor call allocated.
|
|
// t4: JSObject
|
|
__ bind(&allocated);
|
|
__ push(t4);
|
|
|
|
// Push the function and the allocated receiver from the stack.
|
|
// sp[0]: receiver (newly allocated object)
|
|
// sp[1]: constructor function
|
|
// sp[2]: number of arguments (smi-tagged)
|
|
__ lw(a1, MemOperand(sp, kPointerSize));
|
|
__ MultiPushReversed(a1.bit() | t4.bit());
|
|
|
|
// Reload the number of arguments from the stack.
|
|
// a1: constructor function
|
|
// sp[0]: receiver
|
|
// sp[1]: constructor function
|
|
// sp[2]: receiver
|
|
// sp[3]: constructor function
|
|
// sp[4]: number of arguments (smi-tagged)
|
|
__ lw(a3, MemOperand(sp, 4 * kPointerSize));
|
|
|
|
// Setup pointer to last argument.
|
|
__ Addu(a2, fp, Operand(StandardFrameConstants::kCallerSPOffset));
|
|
|
|
// Setup number of arguments for function call below.
|
|
__ srl(a0, a3, kSmiTagSize);
|
|
|
|
// Copy arguments and receiver to the expression stack.
|
|
// a0: number of arguments
|
|
// a1: constructor function
|
|
// a2: address of last argument (caller sp)
|
|
// a3: number of arguments (smi-tagged)
|
|
// sp[0]: receiver
|
|
// sp[1]: constructor function
|
|
// sp[2]: receiver
|
|
// sp[3]: constructor function
|
|
// sp[4]: number of arguments (smi-tagged)
|
|
Label loop, entry;
|
|
__ jmp(&entry);
|
|
__ bind(&loop);
|
|
__ sll(t0, a3, kPointerSizeLog2 - kSmiTagSize);
|
|
__ Addu(t0, a2, Operand(t0));
|
|
__ lw(t1, MemOperand(t0));
|
|
__ push(t1);
|
|
__ bind(&entry);
|
|
__ Addu(a3, a3, Operand(-2));
|
|
__ Branch(&loop, greater_equal, a3, Operand(zero_reg));
|
|
|
|
// Call the function.
|
|
// a0: number of arguments
|
|
// a1: constructor function
|
|
if (is_api_function) {
|
|
__ lw(cp, FieldMemOperand(a1, JSFunction::kContextOffset));
|
|
Handle<Code> code =
|
|
masm->isolate()->builtins()->HandleApiCallConstruct();
|
|
ParameterCount expected(0);
|
|
__ InvokeCode(code, expected, expected,
|
|
RelocInfo::CODE_TARGET, CALL_FUNCTION, CALL_AS_METHOD);
|
|
} else {
|
|
ParameterCount actual(a0);
|
|
__ InvokeFunction(a1, actual, CALL_FUNCTION,
|
|
NullCallWrapper(), CALL_AS_METHOD);
|
|
}
|
|
|
|
// Pop the function from the stack.
|
|
// v0: result
|
|
// sp[0]: constructor function
|
|
// sp[2]: receiver
|
|
// sp[3]: constructor function
|
|
// sp[4]: number of arguments (smi-tagged)
|
|
__ Pop();
|
|
|
|
// Restore context from the frame.
|
|
__ lw(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.
|
|
// v0: result
|
|
// sp[0]: receiver (newly allocated object)
|
|
// sp[1]: constructor function
|
|
// sp[2]: number of arguments (smi-tagged)
|
|
__ And(t0, v0, Operand(kSmiTagMask));
|
|
__ Branch(&use_receiver, eq, t0, Operand(zero_reg));
|
|
|
|
// 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.
|
|
__ GetObjectType(v0, a3, a3);
|
|
__ Branch(&exit, greater_equal, a3, Operand(FIRST_SPEC_OBJECT_TYPE));
|
|
|
|
// Throw away the result of the constructor invocation and use the
|
|
// on-stack receiver as the result.
|
|
__ bind(&use_receiver);
|
|
__ lw(v0, MemOperand(sp));
|
|
|
|
// Remove receiver from the stack, remove caller arguments, and
|
|
// return.
|
|
__ bind(&exit);
|
|
// v0: result
|
|
// sp[0]: receiver (newly allocated object)
|
|
// sp[1]: constructor function
|
|
// sp[2]: number of arguments (smi-tagged)
|
|
__ lw(a1, MemOperand(sp, 2 * kPointerSize));
|
|
__ LeaveConstructFrame();
|
|
__ sll(t0, a1, kPointerSizeLog2 - 1);
|
|
__ Addu(sp, sp, t0);
|
|
__ Addu(sp, sp, kPointerSize);
|
|
__ IncrementCounter(isolate->counters()->constructed_objects(), 1, a1, a2);
|
|
__ Ret();
|
|
}
|
|
|
|
|
|
void Builtins::Generate_JSConstructStubCountdown(MacroAssembler* masm) {
|
|
Generate_JSConstructStubHelper(masm, false, true);
|
|
}
|
|
|
|
|
|
void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
|
|
Generate_JSConstructStubHelper(masm, false, false);
|
|
}
|
|
|
|
|
|
void Builtins::Generate_JSConstructStubApi(MacroAssembler* masm) {
|
|
Generate_JSConstructStubHelper(masm, true, false);
|
|
}
|
|
|
|
|
|
static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm,
|
|
bool is_construct) {
|
|
// Called from JSEntryStub::GenerateBody
|
|
|
|
// ----------- S t a t e -------------
|
|
// -- a0: code entry
|
|
// -- a1: function
|
|
// -- a2: reveiver_pointer
|
|
// -- a3: argc
|
|
// -- s0: argv
|
|
// -----------------------------------
|
|
|
|
// Clear the context before we push it when entering the JS frame.
|
|
__ mov(cp, zero_reg);
|
|
|
|
// Enter an internal frame.
|
|
__ EnterInternalFrame();
|
|
|
|
// Set up the context from the function argument.
|
|
__ lw(cp, FieldMemOperand(a1, JSFunction::kContextOffset));
|
|
|
|
// Set up the roots register.
|
|
ExternalReference roots_address =
|
|
ExternalReference::roots_address(masm->isolate());
|
|
__ li(s6, Operand(roots_address));
|
|
|
|
// Push the function and the receiver onto the stack.
|
|
__ Push(a1, a2);
|
|
|
|
// Copy arguments to the stack in a loop.
|
|
// a3: argc
|
|
// s0: argv, ie points to first arg
|
|
Label loop, entry;
|
|
__ sll(t0, a3, kPointerSizeLog2);
|
|
__ addu(t2, s0, t0);
|
|
__ b(&entry);
|
|
__ nop(); // Branch delay slot nop.
|
|
// t2 points past last arg.
|
|
__ bind(&loop);
|
|
__ lw(t0, MemOperand(s0)); // Read next parameter.
|
|
__ addiu(s0, s0, kPointerSize);
|
|
__ lw(t0, MemOperand(t0)); // Dereference handle.
|
|
__ push(t0); // Push parameter.
|
|
__ bind(&entry);
|
|
__ Branch(&loop, ne, s0, Operand(t2));
|
|
|
|
// Initialize all JavaScript callee-saved registers, since they will be seen
|
|
// by the garbage collector as part of handlers.
|
|
__ LoadRoot(t0, Heap::kUndefinedValueRootIndex);
|
|
__ mov(s1, t0);
|
|
__ mov(s2, t0);
|
|
__ mov(s3, t0);
|
|
__ mov(s4, t0);
|
|
__ mov(s5, t0);
|
|
// s6 holds the root address. Do not clobber.
|
|
// s7 is cp. Do not init.
|
|
|
|
// Invoke the code and pass argc as a0.
|
|
__ mov(a0, a3);
|
|
if (is_construct) {
|
|
__ Call(masm->isolate()->builtins()->JSConstructCall(),
|
|
RelocInfo::CODE_TARGET);
|
|
} else {
|
|
ParameterCount actual(a0);
|
|
__ InvokeFunction(a1, actual, CALL_FUNCTION,
|
|
NullCallWrapper(), CALL_AS_METHOD);
|
|
}
|
|
|
|
__ LeaveInternalFrame();
|
|
|
|
__ Jump(ra);
|
|
}
|
|
|
|
|
|
void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) {
|
|
Generate_JSEntryTrampolineHelper(masm, false);
|
|
}
|
|
|
|
|
|
void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) {
|
|
Generate_JSEntryTrampolineHelper(masm, true);
|
|
}
|
|
|
|
|
|
void Builtins::Generate_LazyCompile(MacroAssembler* masm) {
|
|
// Enter an internal frame.
|
|
__ EnterInternalFrame();
|
|
|
|
// Preserve the function.
|
|
__ push(a1);
|
|
// Push call kind information.
|
|
__ push(t1);
|
|
|
|
// Push the function on the stack as the argument to the runtime function.
|
|
__ push(a1);
|
|
// Call the runtime function.
|
|
__ CallRuntime(Runtime::kLazyCompile, 1);
|
|
// Calculate the entry point.
|
|
__ addiu(t9, v0, Code::kHeaderSize - kHeapObjectTag);
|
|
|
|
// Restore call kind information.
|
|
__ pop(t1);
|
|
// Restore saved function.
|
|
__ pop(a1);
|
|
|
|
// Tear down temporary frame.
|
|
__ LeaveInternalFrame();
|
|
|
|
// Do a tail-call of the compiled function.
|
|
__ Jump(t9);
|
|
}
|
|
|
|
|
|
void Builtins::Generate_LazyRecompile(MacroAssembler* masm) {
|
|
// Enter an internal frame.
|
|
__ EnterInternalFrame();
|
|
|
|
// Preserve the function.
|
|
__ push(a1);
|
|
// Push call kind information.
|
|
__ push(t1);
|
|
|
|
// Push the function on the stack as the argument to the runtime function.
|
|
__ push(a1);
|
|
__ CallRuntime(Runtime::kLazyRecompile, 1);
|
|
// Calculate the entry point.
|
|
__ Addu(t9, v0, Operand(Code::kHeaderSize - kHeapObjectTag));
|
|
|
|
// Restore call kind information.
|
|
__ pop(t1);
|
|
// Restore saved function.
|
|
__ pop(a1);
|
|
|
|
// Tear down temporary frame.
|
|
__ LeaveInternalFrame();
|
|
|
|
// Do a tail-call of the compiled function.
|
|
__ Jump(t9);
|
|
}
|
|
|
|
|
|
// These functions are called from C++ but cannot be used in live code.
|
|
void Builtins::Generate_NotifyDeoptimized(MacroAssembler* masm) {
|
|
__ Abort("Call to unimplemented function in builtins-mips.cc");
|
|
}
|
|
|
|
|
|
void Builtins::Generate_NotifyLazyDeoptimized(MacroAssembler* masm) {
|
|
__ Abort("Call to unimplemented function in builtins-mips.cc");
|
|
}
|
|
|
|
|
|
void Builtins::Generate_NotifyOSR(MacroAssembler* masm) {
|
|
__ Abort("Call to unimplemented function in builtins-mips.cc");
|
|
}
|
|
|
|
|
|
void Builtins::Generate_OnStackReplacement(MacroAssembler* masm) {
|
|
__ Abort("Call to unimplemented function in builtins-mips.cc");
|
|
}
|
|
|
|
|
|
void Builtins::Generate_FunctionCall(MacroAssembler* masm) {
|
|
// 1. Make sure we have at least one argument.
|
|
// a0: actual number of arguments
|
|
{ Label done;
|
|
__ Branch(&done, ne, a0, Operand(zero_reg));
|
|
__ LoadRoot(t2, Heap::kUndefinedValueRootIndex);
|
|
__ push(t2);
|
|
__ Addu(a0, a0, Operand(1));
|
|
__ bind(&done);
|
|
}
|
|
|
|
// 2. Get the function to call (passed as receiver) from the stack, check
|
|
// if it is a function.
|
|
// a0: actual number of arguments
|
|
Label non_function;
|
|
__ sll(at, a0, kPointerSizeLog2);
|
|
__ addu(at, sp, at);
|
|
__ lw(a1, MemOperand(at));
|
|
__ And(at, a1, Operand(kSmiTagMask));
|
|
__ Branch(&non_function, eq, at, Operand(zero_reg));
|
|
__ GetObjectType(a1, a2, a2);
|
|
__ Branch(&non_function, ne, a2, Operand(JS_FUNCTION_TYPE));
|
|
|
|
// 3a. Patch the first argument if necessary when calling a function.
|
|
// a0: actual number of arguments
|
|
// a1: function
|
|
Label shift_arguments;
|
|
{ Label convert_to_object, use_global_receiver, patch_receiver;
|
|
// Change context eagerly in case we need the global receiver.
|
|
__ lw(cp, FieldMemOperand(a1, JSFunction::kContextOffset));
|
|
|
|
// Do not transform the receiver for strict mode functions.
|
|
__ lw(a2, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
|
|
__ lw(a3, FieldMemOperand(a2, SharedFunctionInfo::kCompilerHintsOffset));
|
|
__ And(t0, a3, Operand(1 << (SharedFunctionInfo::kStrictModeFunction +
|
|
kSmiTagSize)));
|
|
__ Branch(&shift_arguments, ne, t0, Operand(zero_reg));
|
|
|
|
// Do not transform the receiver for native (Compilerhints already in a3).
|
|
__ And(t0, a3, Operand(1 << (SharedFunctionInfo::kNative + kSmiTagSize)));
|
|
__ Branch(&shift_arguments, ne, t0, Operand(zero_reg));
|
|
|
|
// Compute the receiver in non-strict mode.
|
|
// Load first argument in a2. a2 = -kPointerSize(sp + n_args << 2).
|
|
__ sll(at, a0, kPointerSizeLog2);
|
|
__ addu(a2, sp, at);
|
|
__ lw(a2, MemOperand(a2, -kPointerSize));
|
|
// a0: actual number of arguments
|
|
// a1: function
|
|
// a2: first argument
|
|
__ JumpIfSmi(a2, &convert_to_object, t2);
|
|
|
|
__ LoadRoot(a3, Heap::kUndefinedValueRootIndex);
|
|
__ Branch(&use_global_receiver, eq, a2, Operand(a3));
|
|
__ LoadRoot(a3, Heap::kNullValueRootIndex);
|
|
__ Branch(&use_global_receiver, eq, a2, Operand(a3));
|
|
|
|
STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE);
|
|
__ GetObjectType(a2, a3, a3);
|
|
__ Branch(&shift_arguments, ge, a3, Operand(FIRST_SPEC_OBJECT_TYPE));
|
|
|
|
__ bind(&convert_to_object);
|
|
__ EnterInternalFrame(); // In order to preserve argument count.
|
|
__ sll(a0, a0, kSmiTagSize); // Smi tagged.
|
|
__ push(a0);
|
|
|
|
__ push(a2);
|
|
__ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION);
|
|
__ mov(a2, v0);
|
|
|
|
__ pop(a0);
|
|
__ sra(a0, a0, kSmiTagSize); // Un-tag.
|
|
__ LeaveInternalFrame();
|
|
// Restore the function to a1.
|
|
__ sll(at, a0, kPointerSizeLog2);
|
|
__ addu(at, sp, at);
|
|
__ lw(a1, MemOperand(at));
|
|
__ Branch(&patch_receiver);
|
|
|
|
// Use the global receiver object from the called function as the
|
|
// receiver.
|
|
__ bind(&use_global_receiver);
|
|
const int kGlobalIndex =
|
|
Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize;
|
|
__ lw(a2, FieldMemOperand(cp, kGlobalIndex));
|
|
__ lw(a2, FieldMemOperand(a2, GlobalObject::kGlobalContextOffset));
|
|
__ lw(a2, FieldMemOperand(a2, kGlobalIndex));
|
|
__ lw(a2, FieldMemOperand(a2, GlobalObject::kGlobalReceiverOffset));
|
|
|
|
__ bind(&patch_receiver);
|
|
__ sll(at, a0, kPointerSizeLog2);
|
|
__ addu(a3, sp, at);
|
|
__ sw(a2, MemOperand(a3, -kPointerSize));
|
|
|
|
__ Branch(&shift_arguments);
|
|
}
|
|
|
|
// 3b. 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.
|
|
// a0: actual number of arguments
|
|
// a1: function
|
|
__ bind(&non_function);
|
|
// Restore the function in case it has been modified.
|
|
__ sll(at, a0, kPointerSizeLog2);
|
|
__ addu(a2, sp, at);
|
|
__ sw(a1, MemOperand(a2, -kPointerSize));
|
|
// Clear a1 to indicate a non-function being called.
|
|
__ mov(a1, zero_reg);
|
|
|
|
// 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.
|
|
// a0: actual number of arguments
|
|
// a1: function
|
|
__ bind(&shift_arguments);
|
|
{ Label loop;
|
|
// Calculate the copy start address (destination). Copy end address is sp.
|
|
__ sll(at, a0, kPointerSizeLog2);
|
|
__ addu(a2, sp, at);
|
|
|
|
__ bind(&loop);
|
|
__ lw(at, MemOperand(a2, -kPointerSize));
|
|
__ sw(at, MemOperand(a2));
|
|
__ Subu(a2, a2, Operand(kPointerSize));
|
|
__ Branch(&loop, ne, a2, Operand(sp));
|
|
// Adjust the actual number of arguments and remove the top element
|
|
// (which is a copy of the last argument).
|
|
__ Subu(a0, a0, Operand(1));
|
|
__ Pop();
|
|
}
|
|
|
|
// 5a. Call non-function via tail call to CALL_NON_FUNCTION builtin.
|
|
// a0: actual number of arguments
|
|
// a1: function
|
|
{ Label function;
|
|
__ Branch(&function, ne, a1, Operand(zero_reg));
|
|
__ mov(a2, zero_reg); // expected arguments is 0 for CALL_NON_FUNCTION
|
|
__ GetBuiltinEntry(a3, Builtins::CALL_NON_FUNCTION);
|
|
__ SetCallKind(t1, CALL_AS_METHOD);
|
|
__ 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 edx without checking arguments.
|
|
// a0: actual number of arguments
|
|
// a1: function
|
|
__ lw(a3, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
|
|
__ lw(a2,
|
|
FieldMemOperand(a3, SharedFunctionInfo::kFormalParameterCountOffset));
|
|
__ sra(a2, a2, kSmiTagSize);
|
|
__ lw(a3, FieldMemOperand(a1, JSFunction::kCodeEntryOffset));
|
|
__ SetCallKind(t1, CALL_AS_METHOD);
|
|
// Check formal and actual parameter counts.
|
|
__ Jump(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(),
|
|
RelocInfo::CODE_TARGET, ne, a2, Operand(a0));
|
|
|
|
ParameterCount expected(0);
|
|
__ InvokeCode(a3, expected, expected, JUMP_FUNCTION,
|
|
NullCallWrapper(), CALL_AS_METHOD);
|
|
}
|
|
|
|
|
|
void Builtins::Generate_FunctionApply(MacroAssembler* masm) {
|
|
const int kIndexOffset = -5 * kPointerSize;
|
|
const int kLimitOffset = -4 * kPointerSize;
|
|
const int kArgsOffset = 2 * kPointerSize;
|
|
const int kRecvOffset = 3 * kPointerSize;
|
|
const int kFunctionOffset = 4 * kPointerSize;
|
|
|
|
__ EnterInternalFrame();
|
|
|
|
__ lw(a0, MemOperand(fp, kFunctionOffset)); // Get the function.
|
|
__ push(a0);
|
|
__ lw(a0, MemOperand(fp, kArgsOffset)); // Get the args array.
|
|
__ push(a0);
|
|
// Returns (in v0) number of arguments to copy to stack as Smi.
|
|
__ InvokeBuiltin(Builtins::APPLY_PREPARE, CALL_FUNCTION);
|
|
|
|
// Check the stack for overflow. We are not trying need to catch
|
|
// interruptions (e.g. debug break and preemption) here, so the "real stack
|
|
// limit" is checked.
|
|
Label okay;
|
|
__ LoadRoot(a2, Heap::kRealStackLimitRootIndex);
|
|
// Make a2 the space we have left. The stack might already be overflowed
|
|
// here which will cause a2 to become negative.
|
|
__ subu(a2, sp, a2);
|
|
// Check if the arguments will overflow the stack.
|
|
__ sll(t0, v0, kPointerSizeLog2 - kSmiTagSize);
|
|
__ Branch(&okay, gt, a2, Operand(t0)); // Signed comparison.
|
|
|
|
// Out of stack space.
|
|
__ lw(a1, MemOperand(fp, kFunctionOffset));
|
|
__ push(a1);
|
|
__ push(v0);
|
|
__ InvokeBuiltin(Builtins::APPLY_OVERFLOW, CALL_FUNCTION);
|
|
// End of stack check.
|
|
|
|
// Push current limit and index.
|
|
__ bind(&okay);
|
|
__ push(v0); // Limit.
|
|
__ mov(a1, zero_reg); // Initial index.
|
|
__ push(a1);
|
|
|
|
// Change context eagerly to get the right global object if necessary.
|
|
__ lw(a0, MemOperand(fp, kFunctionOffset));
|
|
__ lw(cp, FieldMemOperand(a0, JSFunction::kContextOffset));
|
|
// Load the shared function info while the function is still in a0.
|
|
__ lw(a1, FieldMemOperand(a0, JSFunction::kSharedFunctionInfoOffset));
|
|
|
|
// Compute the receiver.
|
|
Label call_to_object, use_global_receiver, push_receiver;
|
|
__ lw(a0, MemOperand(fp, kRecvOffset));
|
|
|
|
// Do not transform the receiver for strict mode functions.
|
|
__ lw(a2, FieldMemOperand(a1, SharedFunctionInfo::kCompilerHintsOffset));
|
|
__ And(t0, a2, Operand(1 << (SharedFunctionInfo::kStrictModeFunction +
|
|
kSmiTagSize)));
|
|
__ Branch(&push_receiver, ne, t0, Operand(zero_reg));
|
|
|
|
// Do not transform the receiver for native (Compilerhints already in a2).
|
|
__ And(t0, a2, Operand(1 << (SharedFunctionInfo::kNative + kSmiTagSize)));
|
|
__ Branch(&push_receiver, ne, t0, Operand(zero_reg));
|
|
|
|
// Compute the receiver in non-strict mode.
|
|
__ And(t0, a0, Operand(kSmiTagMask));
|
|
__ Branch(&call_to_object, eq, t0, Operand(zero_reg));
|
|
__ LoadRoot(a1, Heap::kNullValueRootIndex);
|
|
__ Branch(&use_global_receiver, eq, a0, Operand(a1));
|
|
__ LoadRoot(a2, Heap::kUndefinedValueRootIndex);
|
|
__ Branch(&use_global_receiver, eq, a0, Operand(a2));
|
|
|
|
// Check if the receiver is already a JavaScript object.
|
|
// a0: receiver
|
|
STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE);
|
|
__ GetObjectType(a0, a1, a1);
|
|
__ Branch(&push_receiver, ge, a1, Operand(FIRST_SPEC_OBJECT_TYPE));
|
|
|
|
// Convert the receiver to a regular object.
|
|
// a0: receiver
|
|
__ bind(&call_to_object);
|
|
__ push(a0);
|
|
__ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION);
|
|
__ mov(a0, v0); // Put object in a0 to match other paths to push_receiver.
|
|
__ Branch(&push_receiver);
|
|
|
|
// Use the current global receiver object as the receiver.
|
|
__ bind(&use_global_receiver);
|
|
const int kGlobalOffset =
|
|
Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize;
|
|
__ lw(a0, FieldMemOperand(cp, kGlobalOffset));
|
|
__ lw(a0, FieldMemOperand(a0, GlobalObject::kGlobalContextOffset));
|
|
__ lw(a0, FieldMemOperand(a0, kGlobalOffset));
|
|
__ lw(a0, FieldMemOperand(a0, GlobalObject::kGlobalReceiverOffset));
|
|
|
|
// Push the receiver.
|
|
// a0: receiver
|
|
__ bind(&push_receiver);
|
|
__ push(a0);
|
|
|
|
// Copy all arguments from the array to the stack.
|
|
Label entry, loop;
|
|
__ lw(a0, MemOperand(fp, kIndexOffset));
|
|
__ Branch(&entry);
|
|
|
|
// Load the current argument from the arguments array and push it to the
|
|
// stack.
|
|
// a0: current argument index
|
|
__ bind(&loop);
|
|
__ lw(a1, MemOperand(fp, kArgsOffset));
|
|
__ push(a1);
|
|
__ push(a0);
|
|
|
|
// Call the runtime to access the property in the arguments array.
|
|
__ CallRuntime(Runtime::kGetProperty, 2);
|
|
__ push(v0);
|
|
|
|
// Use inline caching to access the arguments.
|
|
__ lw(a0, MemOperand(fp, kIndexOffset));
|
|
__ Addu(a0, a0, Operand(1 << kSmiTagSize));
|
|
__ sw(a0, MemOperand(fp, kIndexOffset));
|
|
|
|
// Test if the copy loop has finished copying all the elements from the
|
|
// arguments object.
|
|
__ bind(&entry);
|
|
__ lw(a1, MemOperand(fp, kLimitOffset));
|
|
__ Branch(&loop, ne, a0, Operand(a1));
|
|
// Invoke the function.
|
|
ParameterCount actual(a0);
|
|
__ sra(a0, a0, kSmiTagSize);
|
|
__ lw(a1, MemOperand(fp, kFunctionOffset));
|
|
__ InvokeFunction(a1, actual, CALL_FUNCTION,
|
|
NullCallWrapper(), CALL_AS_METHOD);
|
|
|
|
// Tear down the internal frame and remove function, receiver and args.
|
|
__ LeaveInternalFrame();
|
|
__ Addu(sp, sp, Operand(3 * kPointerSize));
|
|
__ Ret();
|
|
}
|
|
|
|
|
|
static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) {
|
|
__ sll(a0, a0, kSmiTagSize);
|
|
__ li(t0, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
|
|
__ MultiPush(a0.bit() | a1.bit() | t0.bit() | fp.bit() | ra.bit());
|
|
__ Addu(fp, sp, Operand(3 * kPointerSize));
|
|
}
|
|
|
|
|
|
static void LeaveArgumentsAdaptorFrame(MacroAssembler* masm) {
|
|
// ----------- S t a t e -------------
|
|
// -- v0 : result being passed through
|
|
// -----------------------------------
|
|
// Get the number of arguments passed (as a smi), tear down the frame and
|
|
// then tear down the parameters.
|
|
__ lw(a1, MemOperand(fp, -3 * kPointerSize));
|
|
__ mov(sp, fp);
|
|
__ MultiPop(fp.bit() | ra.bit());
|
|
__ sll(t0, a1, kPointerSizeLog2 - kSmiTagSize);
|
|
__ Addu(sp, sp, t0);
|
|
// Adjust for the receiver.
|
|
__ Addu(sp, sp, Operand(kPointerSize));
|
|
}
|
|
|
|
|
|
void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) {
|
|
// State setup as expected by MacroAssembler::InvokePrologue.
|
|
// ----------- S t a t e -------------
|
|
// -- a0: actual arguments count
|
|
// -- a1: function (passed through to callee)
|
|
// -- a2: expected arguments count
|
|
// -- a3: callee code entry
|
|
// -- t1: call kind information
|
|
// -----------------------------------
|
|
|
|
Label invoke, dont_adapt_arguments;
|
|
|
|
Label enough, too_few;
|
|
__ Branch(&dont_adapt_arguments, eq,
|
|
a2, Operand(SharedFunctionInfo::kDontAdaptArgumentsSentinel));
|
|
// We use Uless as the number of argument should always be greater than 0.
|
|
__ Branch(&too_few, Uless, a0, Operand(a2));
|
|
|
|
{ // Enough parameters: actual >= expected.
|
|
// a0: actual number of arguments as a smi
|
|
// a1: function
|
|
// a2: expected number of arguments
|
|
// a3: code entry to call
|
|
__ bind(&enough);
|
|
EnterArgumentsAdaptorFrame(masm);
|
|
|
|
// Calculate copy start address into a0 and copy end address into a2.
|
|
__ sll(a0, a0, kPointerSizeLog2 - kSmiTagSize);
|
|
__ Addu(a0, fp, a0);
|
|
// Adjust for return address and receiver.
|
|
__ Addu(a0, a0, Operand(2 * kPointerSize));
|
|
// Compute copy end address.
|
|
__ sll(a2, a2, kPointerSizeLog2);
|
|
__ subu(a2, a0, a2);
|
|
|
|
// Copy the arguments (including the receiver) to the new stack frame.
|
|
// a0: copy start address
|
|
// a1: function
|
|
// a2: copy end address
|
|
// a3: code entry to call
|
|
|
|
Label copy;
|
|
__ bind(©);
|
|
__ lw(t0, MemOperand(a0));
|
|
__ push(t0);
|
|
__ Branch(USE_DELAY_SLOT, ©, ne, a0, Operand(a2));
|
|
__ addiu(a0, a0, -kPointerSize); // In delay slot.
|
|
|
|
__ jmp(&invoke);
|
|
}
|
|
|
|
{ // Too few parameters: Actual < expected.
|
|
__ bind(&too_few);
|
|
EnterArgumentsAdaptorFrame(masm);
|
|
|
|
// TODO(MIPS): Optimize these loops.
|
|
|
|
// Calculate copy start address into a0 and copy end address is fp.
|
|
// a0: actual number of arguments as a smi
|
|
// a1: function
|
|
// a2: expected number of arguments
|
|
// a3: code entry to call
|
|
__ sll(a0, a0, kPointerSizeLog2 - kSmiTagSize);
|
|
__ Addu(a0, fp, a0);
|
|
// Adjust for return address and receiver.
|
|
__ Addu(a0, a0, Operand(2 * kPointerSize));
|
|
// Compute copy end address. Also adjust for return address.
|
|
__ Addu(t3, fp, kPointerSize);
|
|
|
|
// Copy the arguments (including the receiver) to the new stack frame.
|
|
// a0: copy start address
|
|
// a1: function
|
|
// a2: expected number of arguments
|
|
// a3: code entry to call
|
|
// t3: copy end address
|
|
Label copy;
|
|
__ bind(©);
|
|
__ lw(t0, MemOperand(a0)); // Adjusted above for return addr and receiver.
|
|
__ push(t0);
|
|
__ Subu(a0, a0, kPointerSize);
|
|
__ Branch(©, ne, a0, Operand(t3));
|
|
|
|
// Fill the remaining expected arguments with undefined.
|
|
// a1: function
|
|
// a2: expected number of arguments
|
|
// a3: code entry to call
|
|
__ LoadRoot(t0, Heap::kUndefinedValueRootIndex);
|
|
__ sll(t2, a2, kPointerSizeLog2);
|
|
__ Subu(a2, fp, Operand(t2));
|
|
__ Addu(a2, a2, Operand(-4 * kPointerSize)); // Adjust for frame.
|
|
|
|
Label fill;
|
|
__ bind(&fill);
|
|
__ push(t0);
|
|
__ Branch(&fill, ne, sp, Operand(a2));
|
|
}
|
|
|
|
// Call the entry point.
|
|
__ bind(&invoke);
|
|
|
|
__ Call(a3);
|
|
|
|
// Exit frame and return.
|
|
LeaveArgumentsAdaptorFrame(masm);
|
|
__ Ret();
|
|
|
|
|
|
// -------------------------------------------
|
|
// Don't adapt arguments.
|
|
// -------------------------------------------
|
|
__ bind(&dont_adapt_arguments);
|
|
__ Jump(a3);
|
|
}
|
|
|
|
|
|
#undef __
|
|
|
|
} } // namespace v8::internal
|
|
|
|
#endif // V8_TARGET_ARCH_MIPS
|
|
|