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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #if V8_TARGET_ARCH_MIPS | 5 #if V8_TARGET_ARCH_MIPS |
6 | 6 |
7 #include "src/codegen.h" | 7 #include "src/codegen.h" |
8 #include "src/debug/debug.h" | 8 #include "src/debug/debug.h" |
9 #include "src/deoptimizer.h" | 9 #include "src/deoptimizer.h" |
10 #include "src/full-codegen/full-codegen.h" | 10 #include "src/full-codegen/full-codegen.h" |
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970 void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) { | 970 void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) { |
971 // Open a frame scope to indicate that there is a frame on the stack. The | 971 // Open a frame scope to indicate that there is a frame on the stack. The |
972 // MANUAL indicates that the scope shouldn't actually generate code to set up | 972 // MANUAL indicates that the scope shouldn't actually generate code to set up |
973 // the frame (that is done below). | 973 // the frame (that is done below). |
974 FrameScope frame_scope(masm, StackFrame::MANUAL); | 974 FrameScope frame_scope(masm, StackFrame::MANUAL); |
975 | 975 |
976 __ Push(ra, fp, cp, a1); | 976 __ Push(ra, fp, cp, a1); |
977 __ Addu(fp, sp, Operand(StandardFrameConstants::kFixedFrameSizeFromFp)); | 977 __ Addu(fp, sp, Operand(StandardFrameConstants::kFixedFrameSizeFromFp)); |
978 __ Push(a3); | 978 __ Push(a3); |
979 | 979 |
980 // Push dispatch table pointer. | |
981 __ li(a0, Operand(ExternalReference::interpreter_dispatch_table_address( | |
982 masm->isolate()))); | |
983 __ push(a0); | |
980 // Push zero for bytecode array offset. | 984 // Push zero for bytecode array offset. |
981 __ Push(zero_reg); | 985 __ Push(zero_reg); |
balazs.kilvady
2016/02/11 10:44:01
You could use __ Push(a0, zero_reg); to save one a
rmcilroy
2016/02/11 12:30:12
Good idea, done. Also pulled in the pushing of new
| |
982 | 986 |
983 // Get the bytecode array from the function object and load the pointer to the | 987 // Get the bytecode array from the function object and load the pointer to the |
984 // first entry into kInterpreterBytecodeRegister. | 988 // first entry into kInterpreterBytecodeRegister. |
985 __ lw(a0, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset)); | 989 __ lw(a0, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset)); |
986 __ lw(kInterpreterBytecodeArrayRegister, | 990 __ lw(kInterpreterBytecodeArrayRegister, |
987 FieldMemOperand(a0, SharedFunctionInfo::kFunctionDataOffset)); | 991 FieldMemOperand(a0, SharedFunctionInfo::kFunctionDataOffset)); |
988 | 992 |
989 if (FLAG_debug_code) { | 993 if (FLAG_debug_code) { |
990 // Check function data field is actually a BytecodeArray object. | 994 // Check function data field is actually a BytecodeArray object. |
991 __ SmiTst(kInterpreterBytecodeArrayRegister, t0); | 995 __ SmiTst(kInterpreterBytecodeArrayRegister, t0); |
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1029 // - Support profiler (specifically profiling_counter). | 1033 // - Support profiler (specifically profiling_counter). |
1030 // - Call ProfileEntryHookStub when isolate has a function_entry_hook. | 1034 // - Call ProfileEntryHookStub when isolate has a function_entry_hook. |
1031 // - Code aging of the BytecodeArray object. | 1035 // - Code aging of the BytecodeArray object. |
1032 | 1036 |
1033 // Load bytecode offset and dispatch table into registers. | 1037 // Load bytecode offset and dispatch table into registers. |
1034 __ LoadRoot(kInterpreterAccumulatorRegister, Heap::kUndefinedValueRootIndex); | 1038 __ LoadRoot(kInterpreterAccumulatorRegister, Heap::kUndefinedValueRootIndex); |
1035 __ Addu(kInterpreterRegisterFileRegister, fp, | 1039 __ Addu(kInterpreterRegisterFileRegister, fp, |
1036 Operand(InterpreterFrameConstants::kRegisterFilePointerFromFp)); | 1040 Operand(InterpreterFrameConstants::kRegisterFilePointerFromFp)); |
1037 __ li(kInterpreterBytecodeOffsetRegister, | 1041 __ li(kInterpreterBytecodeOffsetRegister, |
1038 Operand(BytecodeArray::kHeaderSize - kHeapObjectTag)); | 1042 Operand(BytecodeArray::kHeaderSize - kHeapObjectTag)); |
1039 __ li(kInterpreterDispatchTableRegister, | 1043 __ lw(kInterpreterDispatchTableRegister, |
1040 Operand(ExternalReference::interpreter_dispatch_table_address( | 1044 MemOperand(fp, InterpreterFrameConstants::kDispatchTableFromFp)); |
1041 masm->isolate()))); | |
1042 | 1045 |
1043 // Dispatch to the first bytecode handler for the function. | 1046 // Dispatch to the first bytecode handler for the function. |
1044 __ Addu(a0, kInterpreterBytecodeArrayRegister, | 1047 __ Addu(a0, kInterpreterBytecodeArrayRegister, |
1045 kInterpreterBytecodeOffsetRegister); | 1048 kInterpreterBytecodeOffsetRegister); |
1046 __ lbu(a0, MemOperand(a0)); | 1049 __ lbu(a0, MemOperand(a0)); |
1047 __ Lsa(at, kInterpreterDispatchTableRegister, a0, kPointerSizeLog2); | 1050 __ Lsa(at, kInterpreterDispatchTableRegister, a0, kPointerSizeLog2); |
1048 __ lw(at, MemOperand(at)); | 1051 __ lw(at, MemOperand(at)); |
1049 // TODO(rmcilroy): Make dispatch table point to code entrys to avoid untagging | 1052 // TODO(rmcilroy): Make dispatch table point to code entrys to avoid untagging |
1050 // and header removal. | 1053 // and header removal. |
1051 __ Addu(at, at, Operand(Code::kHeaderSize - kHeapObjectTag)); | 1054 __ Addu(at, at, Operand(Code::kHeaderSize - kHeapObjectTag)); |
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2761 } | 2764 } |
2762 } | 2765 } |
2763 | 2766 |
2764 | 2767 |
2765 #undef __ | 2768 #undef __ |
2766 | 2769 |
2767 } // namespace internal | 2770 } // namespace internal |
2768 } // namespace v8 | 2771 } // namespace v8 |
2769 | 2772 |
2770 #endif // V8_TARGET_ARCH_MIPS | 2773 #endif // V8_TARGET_ARCH_MIPS |
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