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Unified Diff: src/arm/builtins-arm.cc

Issue 92068: Move backend specific files to separate directories. (Closed)
Patch Set: Added CPPPATH flag and made all includes use same base path. Created 11 years, 8 months ago
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Index: src/arm/builtins-arm.cc
diff --git a/src/arm/builtins-arm.cc b/src/arm/builtins-arm.cc
new file mode 100644
index 0000000000000000000000000000000000000000..58eeca8c44b70e5b0eff5351b303c2f1bf5c589b
--- /dev/null
+++ b/src/arm/builtins-arm.cc
@@ -0,0 +1,659 @@
+// Copyright 2006-2008 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following
+// disclaimer in the documentation and/or other materials provided
+// with the distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived
+// from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "v8.h"
+
+#include "codegen-inl.h"
+#include "debug.h"
+#include "runtime.h"
+
+namespace v8 { namespace internal {
+
+
+#define __ ACCESS_MASM(masm)
+
+
+void Builtins::Generate_Adaptor(MacroAssembler* masm, CFunctionId id) {
+ // TODO(1238487): Don't pass the function in a static variable.
+ __ mov(ip, Operand(ExternalReference::builtin_passed_function()));
+ __ str(r1, MemOperand(ip, 0));
+
+ // The actual argument count has already been loaded into register
+ // r0, but JumpToBuiltin expects r0 to contain the number of
+ // arguments including the receiver.
+ __ add(r0, r0, Operand(1));
+ __ JumpToBuiltin(ExternalReference(id));
+}
+
+
+void Builtins::Generate_JSConstructCall(MacroAssembler* masm) {
+ // ----------- S t a t e -------------
+ // -- r0 : number of arguments
+ // -- r1 : constructor function
+ // -- lr : return address
+ // -- sp[...]: constructor arguments
+ // -----------------------------------
+
+ // Enter a construct frame.
+ __ EnterConstructFrame();
+
+ // Preserve the two incoming parameters
+ __ mov(r0, Operand(r0, LSL, kSmiTagSize));
+ __ push(r0); // smi-tagged arguments count
+ __ push(r1); // constructor function
+
+ // Allocate the new receiver object.
+ __ push(r1); // argument for Runtime_NewObject
+ __ CallRuntime(Runtime::kNewObject, 1);
+ __ push(r0); // save the receiver
+
+ // 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)
+ __ ldr(r1, MemOperand(sp, kPointerSize));
+ __ push(r1); // function
+ __ push(r0); // receiver
+
+ // Reload the number of arguments from the stack.
+ // r1: constructor function
+ // sp[0]: receiver
+ // sp[1]: constructor function
+ // sp[2]: receiver
+ // sp[3]: constructor function
+ // sp[4]: number of arguments (smi-tagged)
+ __ ldr(r3, MemOperand(sp, 4 * kPointerSize));
+
+ // Setup pointer to last argument.
+ __ add(r2, fp, Operand(StandardFrameConstants::kCallerSPOffset));
+
+ // Setup number of arguments for function call below
+ __ mov(r0, Operand(r3, LSR, kSmiTagSize));
+
+ // Copy arguments and receiver to the expression stack.
+ // r0: number of arguments
+ // r2: address of last argument (caller sp)
+ // r1: constructor function
+ // r3: 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;
+ __ b(&entry);
+ __ bind(&loop);
+ __ ldr(ip, MemOperand(r2, r3, LSL, kPointerSizeLog2 - 1));
+ __ push(ip);
+ __ bind(&entry);
+ __ sub(r3, r3, Operand(2), SetCC);
+ __ b(ge, &loop);
+
+ // Call the function.
+ // r0: number of arguments
+ // r1: constructor function
+ ParameterCount actual(r0);
+ __ InvokeFunction(r1, actual, CALL_FUNCTION);
+
+ // Pop the function from the stack.
+ // sp[0]: constructor function
+ // sp[2]: receiver
+ // sp[3]: constructor function
+ // sp[4]: number of arguments (smi-tagged)
+ __ pop();
+
+ // Restore context from the frame.
+ // r0: result
+ // sp[0]: receiver
+ // sp[1]: constructor function
+ // sp[2]: number of arguments (smi-tagged)
+ __ ldr(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.
+ // r0: result
+ // sp[0]: receiver (newly allocated object)
+ // sp[1]: constructor function
+ // sp[2]: number of arguments (smi-tagged)
+ __ tst(r0, Operand(kSmiTagMask));
+ __ b(eq, &use_receiver);
+
+ // If the type of the result (stored in its map) is less than
+ // FIRST_JS_OBJECT_TYPE, it is not an object in the ECMA sense.
+ __ ldr(r3, FieldMemOperand(r0, HeapObject::kMapOffset));
+ __ ldrb(r3, FieldMemOperand(r3, Map::kInstanceTypeOffset));
+ __ cmp(r3, Operand(FIRST_JS_OBJECT_TYPE));
+ __ b(ge, &exit);
+
+ // Throw away the result of the constructor invocation and use the
+ // on-stack receiver as the result.
+ __ bind(&use_receiver);
+ __ ldr(r0, MemOperand(sp));
+
+ // Remove receiver from the stack, remove caller arguments, and
+ // return.
+ __ bind(&exit);
+ // r0: result
+ // sp[0]: receiver (newly allocated object)
+ // sp[1]: constructor function
+ // sp[2]: number of arguments (smi-tagged)
+ __ ldr(r1, MemOperand(sp, 2 * kPointerSize));
+ __ LeaveConstructFrame();
+ __ add(sp, sp, Operand(r1, LSL, kPointerSizeLog2 - 1));
+ __ add(sp, sp, Operand(kPointerSize));
+ __ mov(pc, Operand(lr));
+}
+
+
+static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm,
+ bool is_construct) {
+ // Called from Generate_JS_Entry
+ // r0: code entry
+ // r1: function
+ // r2: receiver
+ // r3: argc
+ // r4: argv
+ // r5-r7, cp may be clobbered
+
+ // Clear the context before we push it when entering the JS frame.
+ __ mov(cp, Operand(0));
+
+ // Enter an internal frame.
+ __ EnterInternalFrame();
+
+ // Setup the context from the function argument.
+ __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset));
+
+ // Push the function and the receiver onto the stack.
+ __ push(r1);
+ __ push(r2);
+
+ // Copy arguments to the stack in a loop.
+ // r1: function
+ // r3: argc
+ // r4: argv, i.e. points to first arg
+ Label loop, entry;
+ __ add(r2, r4, Operand(r3, LSL, kPointerSizeLog2));
+ // r2 points past last arg.
+ __ b(&entry);
+ __ bind(&loop);
+ __ ldr(r0, MemOperand(r4, kPointerSize, PostIndex)); // read next parameter
+ __ ldr(r0, MemOperand(r0)); // dereference handle
+ __ push(r0); // push parameter
+ __ bind(&entry);
+ __ cmp(r4, Operand(r2));
+ __ b(ne, &loop);
+
+ // Initialize all JavaScript callee-saved registers, since they will be seen
+ // by the garbage collector as part of handlers.
+ __ mov(r4, Operand(Factory::undefined_value()));
+ __ mov(r5, Operand(r4));
+ __ mov(r6, Operand(r4));
+ __ mov(r7, Operand(r4));
+ if (kR9Available == 1) {
+ __ mov(r9, Operand(r4));
+ }
+
+ // Invoke the code and pass argc as r0.
+ __ mov(r0, Operand(r3));
+ if (is_construct) {
+ __ Call(Handle<Code>(Builtins::builtin(Builtins::JSConstructCall)),
+ RelocInfo::CODE_TARGET);
+ } else {
+ ParameterCount actual(r0);
+ __ InvokeFunction(r1, actual, CALL_FUNCTION);
+ }
+
+ // Exit the JS frame and remove the parameters (except function), and return.
+ // Respect ABI stack constraint.
+ __ LeaveInternalFrame();
+ __ mov(pc, lr);
+
+ // r0: result
+}
+
+
+void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) {
+ Generate_JSEntryTrampolineHelper(masm, false);
+}
+
+
+void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) {
+ Generate_JSEntryTrampolineHelper(masm, true);
+}
+
+
+void Builtins::Generate_FunctionCall(MacroAssembler* masm) {
+ // 1. Make sure we have at least one argument.
+ // r0: actual number of argument
+ { Label done;
+ __ tst(r0, Operand(r0));
+ __ b(ne, &done);
+ __ mov(r2, Operand(Factory::undefined_value()));
+ __ push(r2);
+ __ add(r0, r0, Operand(1));
+ __ bind(&done);
+ }
+
+ // 2. Get the function to call from the stack.
+ // r0: actual number of argument
+ { Label done, non_function, function;
+ __ ldr(r1, MemOperand(sp, r0, LSL, kPointerSizeLog2));
+ __ tst(r1, Operand(kSmiTagMask));
+ __ b(eq, &non_function);
+ __ ldr(r2, FieldMemOperand(r1, HeapObject::kMapOffset));
+ __ ldrb(r2, FieldMemOperand(r2, Map::kInstanceTypeOffset));
+ __ cmp(r2, Operand(JS_FUNCTION_TYPE));
+ __ b(eq, &function);
+
+ // Non-function called: Clear the function to force exception.
+ __ bind(&non_function);
+ __ mov(r1, Operand(0));
+ __ b(&done);
+
+ // Change the context eagerly because it will be used below to get the
+ // right global object.
+ __ bind(&function);
+ __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset));
+
+ __ bind(&done);
+ }
+
+ // 3. Make sure first argument is an object; convert if necessary.
+ // r0: actual number of arguments
+ // r1: function
+ { Label call_to_object, use_global_receiver, patch_receiver, done;
+ __ add(r2, sp, Operand(r0, LSL, kPointerSizeLog2));
+ __ ldr(r2, MemOperand(r2, -kPointerSize));
+
+ // r0: actual number of arguments
+ // r1: function
+ // r2: first argument
+ __ tst(r2, Operand(kSmiTagMask));
+ __ b(eq, &call_to_object);
+
+ __ mov(r3, Operand(Factory::null_value()));
+ __ cmp(r2, r3);
+ __ b(eq, &use_global_receiver);
+ __ mov(r3, Operand(Factory::undefined_value()));
+ __ cmp(r2, r3);
+ __ b(eq, &use_global_receiver);
+
+ __ ldr(r3, FieldMemOperand(r2, HeapObject::kMapOffset));
+ __ ldrb(r3, FieldMemOperand(r3, Map::kInstanceTypeOffset));
+ __ cmp(r3, Operand(FIRST_JS_OBJECT_TYPE));
+ __ b(lt, &call_to_object);
+ __ cmp(r3, Operand(LAST_JS_OBJECT_TYPE));
+ __ b(le, &done);
+
+ __ bind(&call_to_object);
+ __ EnterInternalFrame();
+
+ // Store number of arguments and function across the call into the runtime.
+ __ mov(r0, Operand(r0, LSL, kSmiTagSize));
+ __ push(r0);
+ __ push(r1);
+
+ __ push(r2);
+ __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_JS);
+ __ mov(r2, r0);
+
+ // Restore number of arguments and function.
+ __ pop(r1);
+ __ pop(r0);
+ __ mov(r0, Operand(r0, ASR, kSmiTagSize));
+
+ __ LeaveInternalFrame();
+ __ b(&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;
+ __ ldr(r2, FieldMemOperand(cp, kGlobalIndex));
+ __ ldr(r2, FieldMemOperand(r2, GlobalObject::kGlobalReceiverOffset));
+
+ __ bind(&patch_receiver);
+ __ add(r3, sp, Operand(r0, LSL, kPointerSizeLog2));
+ __ str(r2, MemOperand(r3, -kPointerSize));
+
+ __ bind(&done);
+ }
+
+ // 4. Shift stuff one slot down the stack
+ // r0: actual number of arguments (including call() receiver)
+ // r1: function
+ { Label loop;
+ // Calculate the copy start address (destination). Copy end address is sp.
+ __ add(r2, sp, Operand(r0, LSL, kPointerSizeLog2));
+ __ add(r2, r2, Operand(kPointerSize)); // copy receiver too
+
+ __ bind(&loop);
+ __ ldr(ip, MemOperand(r2, -kPointerSize));
+ __ str(ip, MemOperand(r2));
+ __ sub(r2, r2, Operand(kPointerSize));
+ __ cmp(r2, sp);
+ __ b(ne, &loop);
+ }
+
+ // 5. Adjust the actual number of arguments and remove the top element.
+ // r0: actual number of arguments (including call() receiver)
+ // r1: function
+ __ sub(r0, r0, Operand(1));
+ __ add(sp, sp, Operand(kPointerSize));
+
+ // 6. Get the code for the function or the non-function builtin.
+ // If number of expected arguments matches, then call. Otherwise restart
+ // the arguments adaptor stub.
+ // r0: actual number of arguments
+ // r1: function
+ { Label invoke;
+ __ tst(r1, r1);
+ __ b(ne, &invoke);
+ __ mov(r2, Operand(0)); // expected arguments is 0 for CALL_NON_FUNCTION
+ __ GetBuiltinEntry(r3, Builtins::CALL_NON_FUNCTION);
+ __ Jump(Handle<Code>(builtin(ArgumentsAdaptorTrampoline)),
+ RelocInfo::CODE_TARGET);
+
+ __ bind(&invoke);
+ __ ldr(r3, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset));
+ __ ldr(r2,
+ FieldMemOperand(r3,
+ SharedFunctionInfo::kFormalParameterCountOffset));
+ __ ldr(r3,
+ MemOperand(r3, SharedFunctionInfo::kCodeOffset - kHeapObjectTag));
+ __ add(r3, r3, Operand(Code::kHeaderSize - kHeapObjectTag));
+ __ cmp(r2, r0); // Check formal and actual parameter counts.
+ __ Jump(Handle<Code>(builtin(ArgumentsAdaptorTrampoline)),
+ RelocInfo::CODE_TARGET, ne);
+
+ // 7. Jump to the code in r3 without checking arguments.
+ ParameterCount expected(0);
+ __ InvokeCode(r3, expected, expected, JUMP_FUNCTION);
+ }
+}
+
+
+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();
+
+ __ ldr(r0, MemOperand(fp, kFunctionOffset)); // get the function
+ __ push(r0);
+ __ ldr(r0, MemOperand(fp, kArgsOffset)); // get the args array
+ __ push(r0);
+ __ InvokeBuiltin(Builtins::APPLY_PREPARE, CALL_JS);
+
+ // Eagerly check for stack-overflow before starting to push the arguments.
+ // r0: number of arguments
+ Label okay;
+ ExternalReference stack_guard_limit_address =
+ ExternalReference::address_of_stack_guard_limit();
+ __ mov(r2, Operand(stack_guard_limit_address));
+ __ ldr(r2, MemOperand(r2));
+ __ sub(r2, sp, r2);
+ __ sub(r2, r2, Operand(3 * kPointerSize)); // limit, index, receiver
+
+ __ cmp(r2, Operand(r0, LSL, kPointerSizeLog2 - kSmiTagSize));
+ __ b(hi, &okay);
+
+ // Out of stack space.
+ __ ldr(r1, MemOperand(fp, kFunctionOffset));
+ __ push(r1);
+ __ push(r0);
+ __ InvokeBuiltin(Builtins::APPLY_OVERFLOW, CALL_JS);
+
+ // Push current limit and index.
+ __ bind(&okay);
+ __ push(r0); // limit
+ __ mov(r1, Operand(0)); // initial index
+ __ push(r1);
+
+ // Change context eagerly to get the right global object if necessary.
+ __ ldr(r0, MemOperand(fp, kFunctionOffset));
+ __ ldr(cp, FieldMemOperand(r0, JSFunction::kContextOffset));
+
+ // Compute the receiver.
+ Label call_to_object, use_global_receiver, push_receiver;
+ __ ldr(r0, MemOperand(fp, kRecvOffset));
+ __ tst(r0, Operand(kSmiTagMask));
+ __ b(eq, &call_to_object);
+ __ mov(r1, Operand(Factory::null_value()));
+ __ cmp(r0, r1);
+ __ b(eq, &use_global_receiver);
+ __ mov(r1, Operand(Factory::undefined_value()));
+ __ cmp(r0, r1);
+ __ b(eq, &use_global_receiver);
+
+ // Check if the receiver is already a JavaScript object.
+ // r0: receiver
+ __ ldr(r1, FieldMemOperand(r0, HeapObject::kMapOffset));
+ __ ldrb(r1, FieldMemOperand(r1, Map::kInstanceTypeOffset));
+ __ cmp(r1, Operand(FIRST_JS_OBJECT_TYPE));
+ __ b(lt, &call_to_object);
+ __ cmp(r1, Operand(LAST_JS_OBJECT_TYPE));
+ __ b(le, &push_receiver);
+
+ // Convert the receiver to a regular object.
+ // r0: receiver
+ __ bind(&call_to_object);
+ __ push(r0);
+ __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_JS);
+ __ b(&push_receiver);
+
+ // Use the current global receiver object as the receiver.
+ __ bind(&use_global_receiver);
+ const int kGlobalOffset =
+ Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize;
+ __ ldr(r0, FieldMemOperand(cp, kGlobalOffset));
+ __ ldr(r0, FieldMemOperand(r0, GlobalObject::kGlobalReceiverOffset));
+
+ // Push the receiver.
+ // r0: receiver
+ __ bind(&push_receiver);
+ __ push(r0);
+
+ // Copy all arguments from the array to the stack.
+ Label entry, loop;
+ __ ldr(r0, MemOperand(fp, kIndexOffset));
+ __ b(&entry);
+
+ // Load the current argument from the arguments array and push it to the
+ // stack.
+ // r0: current argument index
+ __ bind(&loop);
+ __ ldr(r1, MemOperand(fp, kArgsOffset));
+ __ push(r1);
+ __ push(r0);
+
+ // Call the runtime to access the property in the arguments array.
+ __ CallRuntime(Runtime::kGetProperty, 2);
+ __ push(r0);
+
+ // Use inline caching to access the arguments.
+ __ ldr(r0, MemOperand(fp, kIndexOffset));
+ __ add(r0, r0, Operand(1 << kSmiTagSize));
+ __ str(r0, MemOperand(fp, kIndexOffset));
+
+ // Test if the copy loop has finished copying all the elements from the
+ // arguments object.
+ __ bind(&entry);
+ __ ldr(r1, MemOperand(fp, kLimitOffset));
+ __ cmp(r0, r1);
+ __ b(ne, &loop);
+
+ // Invoke the function.
+ ParameterCount actual(r0);
+ __ mov(r0, Operand(r0, ASR, kSmiTagSize));
+ __ ldr(r1, MemOperand(fp, kFunctionOffset));
+ __ InvokeFunction(r1, actual, CALL_FUNCTION);
+
+ // Tear down the internal frame and remove function, receiver and args.
+ __ LeaveInternalFrame();
+ __ add(sp, sp, Operand(3 * kPointerSize));
+ __ mov(pc, lr);
+}
+
+
+static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) {
+ __ mov(r0, Operand(r0, LSL, kSmiTagSize));
+ __ mov(r4, Operand(ArgumentsAdaptorFrame::SENTINEL));
+ __ stm(db_w, sp, r0.bit() | r1.bit() | r4.bit() | fp.bit() | lr.bit());
+ __ add(fp, sp, Operand(3 * kPointerSize));
+}
+
+
+static void LeaveArgumentsAdaptorFrame(MacroAssembler* masm) {
+ // ----------- S t a t e -------------
+ // -- r0 : result being passed through
+ // -----------------------------------
+ // Get the number of arguments passed (as a smi), tear down the frame and
+ // then tear down the parameters.
+ __ ldr(r1, MemOperand(fp, -3 * kPointerSize));
+ __ mov(sp, fp);
+ __ ldm(ia_w, sp, fp.bit() | lr.bit());
+ __ add(sp, sp, Operand(r1, LSL, kPointerSizeLog2 - kSmiTagSize));
+ __ add(sp, sp, Operand(kPointerSize)); // adjust for receiver
+}
+
+
+void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) {
+ // ----------- S t a t e -------------
+ // -- r0 : actual number of arguments
+ // -- r1 : function (passed through to callee)
+ // -- r2 : expected number of arguments
+ // -- r3 : code entry to call
+ // -----------------------------------
+
+ Label invoke, dont_adapt_arguments;
+
+ Label enough, too_few;
+ __ cmp(r0, Operand(r2));
+ __ b(lt, &too_few);
+ __ cmp(r2, Operand(SharedFunctionInfo::kDontAdaptArgumentsSentinel));
+ __ b(eq, &dont_adapt_arguments);
+
+ { // Enough parameters: actual >= expected
+ __ bind(&enough);
+ EnterArgumentsAdaptorFrame(masm);
+
+ // Calculate copy start address into r0 and copy end address into r2.
+ // r0: actual number of arguments as a smi
+ // r1: function
+ // r2: expected number of arguments
+ // r3: code entry to call
+ __ add(r0, fp, Operand(r0, LSL, kPointerSizeLog2 - kSmiTagSize));
+ // adjust for return address and receiver
+ __ add(r0, r0, Operand(2 * kPointerSize));
+ __ sub(r2, r0, Operand(r2, LSL, kPointerSizeLog2));
+
+ // Copy the arguments (including the receiver) to the new stack frame.
+ // r0: copy start address
+ // r1: function
+ // r2: copy end address
+ // r3: code entry to call
+
+ Label copy;
+ __ bind(&copy);
+ __ ldr(ip, MemOperand(r0, 0));
+ __ push(ip);
+ __ cmp(r0, r2); // Compare before moving to next argument.
+ __ sub(r0, r0, Operand(kPointerSize));
+ __ b(ne, &copy);
+
+ __ b(&invoke);
+ }
+
+ { // Too few parameters: Actual < expected
+ __ bind(&too_few);
+ EnterArgumentsAdaptorFrame(masm);
+
+ // Calculate copy start address into r0 and copy end address is fp.
+ // r0: actual number of arguments as a smi
+ // r1: function
+ // r2: expected number of arguments
+ // r3: code entry to call
+ __ add(r0, fp, Operand(r0, LSL, kPointerSizeLog2 - kSmiTagSize));
+
+ // Copy the arguments (including the receiver) to the new stack frame.
+ // r0: copy start address
+ // r1: function
+ // r2: expected number of arguments
+ // r3: code entry to call
+ Label copy;
+ __ bind(&copy);
+ // Adjust load for return address and receiver.
+ __ ldr(ip, MemOperand(r0, 2 * kPointerSize));
+ __ push(ip);
+ __ cmp(r0, fp); // Compare before moving to next argument.
+ __ sub(r0, r0, Operand(kPointerSize));
+ __ b(ne, &copy);
+
+ // Fill the remaining expected arguments with undefined.
+ // r1: function
+ // r2: expected number of arguments
+ // r3: code entry to call
+ __ mov(ip, Operand(Factory::undefined_value()));
+ __ sub(r2, fp, Operand(r2, LSL, kPointerSizeLog2));
+ __ sub(r2, r2, Operand(4 * kPointerSize)); // Adjust for frame.
+
+ Label fill;
+ __ bind(&fill);
+ __ push(ip);
+ __ cmp(sp, r2);
+ __ b(ne, &fill);
+ }
+
+ // Call the entry point.
+ __ bind(&invoke);
+ __ Call(r3);
+
+ // Exit frame and return.
+ LeaveArgumentsAdaptorFrame(masm);
+ __ mov(pc, lr);
+
+
+ // -------------------------------------------
+ // Dont adapt arguments.
+ // -------------------------------------------
+ __ bind(&dont_adapt_arguments);
+ __ mov(pc, r3);
+}
+
+
+#undef __
+
+} } // namespace v8::internal
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