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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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1953 // | f()'s arg 1 | 1953 // | f()'s arg 1 |
1954 // | f()'s receiver arg <- sp (f()'s caller pc is not on the stack yet!) | 1954 // | f()'s receiver arg <- sp (f()'s caller pc is not on the stack yet!) |
1955 // ---------------------- | 1955 // ---------------------- |
1956 // | 1956 // |
1957 void PrepareForTailCall(MacroAssembler* masm, Register args_reg, | 1957 void PrepareForTailCall(MacroAssembler* masm, Register args_reg, |
1958 Register scratch1, Register scratch2, | 1958 Register scratch1, Register scratch2, |
1959 Register scratch3) { | 1959 Register scratch3) { |
1960 DCHECK(!AreAliased(args_reg, scratch1, scratch2, scratch3)); | 1960 DCHECK(!AreAliased(args_reg, scratch1, scratch2, scratch3)); |
1961 Comment cmnt(masm, "[ PrepareForTailCall"); | 1961 Comment cmnt(masm, "[ PrepareForTailCall"); |
1962 | 1962 |
1963 // Prepare for tail call only if the debugger is not active. | |
1964 Label done; | |
1965 ExternalReference debug_is_active = | |
1966 ExternalReference::debug_is_active_address(masm->isolate()); | |
1967 __ li(at, Operand(debug_is_active)); | |
1968 __ lb(scratch1, MemOperand(at)); | |
1969 __ Branch(&done, ne, scratch1, Operand(zero_reg)); | |
1970 | |
1971 // Drop possible interpreter handler/stub frame. | 1963 // Drop possible interpreter handler/stub frame. |
1972 { | 1964 { |
1973 Label no_interpreter_frame; | 1965 Label no_interpreter_frame; |
1974 __ lw(scratch3, | 1966 __ lw(scratch3, |
1975 MemOperand(fp, CommonFrameConstants::kContextOrFrameTypeOffset)); | 1967 MemOperand(fp, CommonFrameConstants::kContextOrFrameTypeOffset)); |
1976 __ Branch(&no_interpreter_frame, ne, scratch3, | 1968 __ Branch(&no_interpreter_frame, ne, scratch3, |
1977 Operand(Smi::FromInt(StackFrame::STUB))); | 1969 Operand(Smi::FromInt(StackFrame::STUB))); |
1978 __ lw(fp, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); | 1970 __ lw(fp, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
1979 __ bind(&no_interpreter_frame); | 1971 __ bind(&no_interpreter_frame); |
1980 } | 1972 } |
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2004 __ lw(caller_args_count_reg, | 1996 __ lw(caller_args_count_reg, |
2005 FieldMemOperand(scratch1, | 1997 FieldMemOperand(scratch1, |
2006 SharedFunctionInfo::kFormalParameterCountOffset)); | 1998 SharedFunctionInfo::kFormalParameterCountOffset)); |
2007 __ SmiUntag(caller_args_count_reg); | 1999 __ SmiUntag(caller_args_count_reg); |
2008 | 2000 |
2009 __ bind(&formal_parameter_count_loaded); | 2001 __ bind(&formal_parameter_count_loaded); |
2010 | 2002 |
2011 ParameterCount callee_args_count(args_reg); | 2003 ParameterCount callee_args_count(args_reg); |
2012 __ PrepareForTailCall(callee_args_count, caller_args_count_reg, scratch2, | 2004 __ PrepareForTailCall(callee_args_count, caller_args_count_reg, scratch2, |
2013 scratch3); | 2005 scratch3); |
2014 __ bind(&done); | |
2015 } | 2006 } |
2016 } // namespace | 2007 } // namespace |
2017 | 2008 |
2018 // static | 2009 // static |
2019 void Builtins::Generate_CallFunction(MacroAssembler* masm, | 2010 void Builtins::Generate_CallFunction(MacroAssembler* masm, |
2020 ConvertReceiverMode mode, | 2011 ConvertReceiverMode mode, |
2021 TailCallMode tail_call_mode) { | 2012 TailCallMode tail_call_mode) { |
2022 // ----------- S t a t e ------------- | 2013 // ----------- S t a t e ------------- |
2023 // -- a0 : the number of arguments (not including the receiver) | 2014 // -- a0 : the number of arguments (not including the receiver) |
2024 // -- a1 : the function to call (checked to be a JSFunction) | 2015 // -- a1 : the function to call (checked to be a JSFunction) |
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2599 } | 2590 } |
2600 } | 2591 } |
2601 | 2592 |
2602 | 2593 |
2603 #undef __ | 2594 #undef __ |
2604 | 2595 |
2605 } // namespace internal | 2596 } // namespace internal |
2606 } // namespace v8 | 2597 } // namespace v8 |
2607 | 2598 |
2608 #endif // V8_TARGET_ARCH_MIPS | 2599 #endif // V8_TARGET_ARCH_MIPS |
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