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1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 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_PPC | 5 #if V8_TARGET_ARCH_PPC |
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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1959 // | f()'s arg 1 | 1959 // | f()'s arg 1 |
1960 // | f()'s receiver arg <- sp (f()'s caller pc is not on the stack yet!) | 1960 // | f()'s receiver arg <- sp (f()'s caller pc is not on the stack yet!) |
1961 // ---------------------- | 1961 // ---------------------- |
1962 // | 1962 // |
1963 void PrepareForTailCall(MacroAssembler* masm, Register args_reg, | 1963 void PrepareForTailCall(MacroAssembler* masm, Register args_reg, |
1964 Register scratch1, Register scratch2, | 1964 Register scratch1, Register scratch2, |
1965 Register scratch3) { | 1965 Register scratch3) { |
1966 DCHECK(!AreAliased(args_reg, scratch1, scratch2, scratch3)); | 1966 DCHECK(!AreAliased(args_reg, scratch1, scratch2, scratch3)); |
1967 Comment cmnt(masm, "[ PrepareForTailCall"); | 1967 Comment cmnt(masm, "[ PrepareForTailCall"); |
1968 | 1968 |
1969 // Prepare for tail call only if the debugger is not active. | |
1970 Label done; | |
1971 ExternalReference debug_is_active = | |
1972 ExternalReference::debug_is_active_address(masm->isolate()); | |
1973 __ mov(scratch1, Operand(debug_is_active)); | |
1974 __ lbz(scratch1, MemOperand(scratch1)); | |
1975 __ cmpi(scratch1, Operand::Zero()); | |
1976 __ bne(&done); | |
1977 | |
1978 // Drop possible interpreter handler/stub frame. | 1969 // Drop possible interpreter handler/stub frame. |
1979 { | 1970 { |
1980 Label no_interpreter_frame; | 1971 Label no_interpreter_frame; |
1981 __ LoadP(scratch3, | 1972 __ LoadP(scratch3, |
1982 MemOperand(fp, CommonFrameConstants::kContextOrFrameTypeOffset)); | 1973 MemOperand(fp, CommonFrameConstants::kContextOrFrameTypeOffset)); |
1983 __ CmpSmiLiteral(scratch3, Smi::FromInt(StackFrame::STUB), r0); | 1974 __ CmpSmiLiteral(scratch3, Smi::FromInt(StackFrame::STUB), r0); |
1984 __ bne(&no_interpreter_frame); | 1975 __ bne(&no_interpreter_frame); |
1985 __ LoadP(fp, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); | 1976 __ LoadP(fp, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
1986 __ bind(&no_interpreter_frame); | 1977 __ bind(&no_interpreter_frame); |
1987 } | 1978 } |
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2015 SharedFunctionInfo::kFormalParameterCountOffset)); | 2006 SharedFunctionInfo::kFormalParameterCountOffset)); |
2016 #if !V8_TARGET_ARCH_PPC64 | 2007 #if !V8_TARGET_ARCH_PPC64 |
2017 __ SmiUntag(caller_args_count_reg); | 2008 __ SmiUntag(caller_args_count_reg); |
2018 #endif | 2009 #endif |
2019 | 2010 |
2020 __ bind(&formal_parameter_count_loaded); | 2011 __ bind(&formal_parameter_count_loaded); |
2021 | 2012 |
2022 ParameterCount callee_args_count(args_reg); | 2013 ParameterCount callee_args_count(args_reg); |
2023 __ PrepareForTailCall(callee_args_count, caller_args_count_reg, scratch2, | 2014 __ PrepareForTailCall(callee_args_count, caller_args_count_reg, scratch2, |
2024 scratch3); | 2015 scratch3); |
2025 __ bind(&done); | |
2026 } | 2016 } |
2027 } // namespace | 2017 } // namespace |
2028 | 2018 |
2029 // static | 2019 // static |
2030 void Builtins::Generate_CallFunction(MacroAssembler* masm, | 2020 void Builtins::Generate_CallFunction(MacroAssembler* masm, |
2031 ConvertReceiverMode mode, | 2021 ConvertReceiverMode mode, |
2032 TailCallMode tail_call_mode) { | 2022 TailCallMode tail_call_mode) { |
2033 // ----------- S t a t e ------------- | 2023 // ----------- S t a t e ------------- |
2034 // -- r3 : the number of arguments (not including the receiver) | 2024 // -- r3 : the number of arguments (not including the receiver) |
2035 // -- r4 : the function to call (checked to be a JSFunction) | 2025 // -- r4 : the function to call (checked to be a JSFunction) |
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2571 __ bkpt(0); | 2561 __ bkpt(0); |
2572 } | 2562 } |
2573 } | 2563 } |
2574 | 2564 |
2575 | 2565 |
2576 #undef __ | 2566 #undef __ |
2577 } // namespace internal | 2567 } // namespace internal |
2578 } // namespace v8 | 2568 } // namespace v8 |
2579 | 2569 |
2580 #endif // V8_TARGET_ARCH_PPC | 2570 #endif // V8_TARGET_ARCH_PPC |
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