1 // Copyright 2011 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef V8_X64_CODEGEN_X64_H_ 6 #define V8_X64_CODEGEN_X64_H_ 7 8 #include "src/macro-assembler.h" 9 10 namespace v8 { 11 namespace internal { 12 13 14 class StringCharLoadGenerator : public AllStatic { 15 public: 16 // Generates the code for handling different string types and loading the 17 // indexed character into |result|. We expect |index| as untagged input and 18 // |result| as untagged output. 19 static void Generate(MacroAssembler* masm, 20 Register string, 21 Register index, 22 Register result, 23 Label* call_runtime); 24 25 private: 26 DISALLOW_COPY_AND_ASSIGN(StringCharLoadGenerator); 27 }; 28 29 30 enum StackArgumentsAccessorReceiverMode { 31 ARGUMENTS_CONTAIN_RECEIVER, 32 ARGUMENTS_DONT_CONTAIN_RECEIVER 33 }; 34 35 36 class StackArgumentsAccessor BASE_EMBEDDED { 37 public: 38 StackArgumentsAccessor( 39 Register base_reg, 40 int argument_count_immediate, 41 StackArgumentsAccessorReceiverMode receiver_mode = 42 ARGUMENTS_CONTAIN_RECEIVER, 43 int extra_displacement_to_last_argument = 0) base_reg_(base_reg)44 : base_reg_(base_reg), 45 argument_count_reg_(no_reg), 46 argument_count_immediate_(argument_count_immediate), 47 receiver_mode_(receiver_mode), 48 extra_displacement_to_last_argument_( 49 extra_displacement_to_last_argument) { } 50 51 StackArgumentsAccessor( 52 Register base_reg, 53 Register argument_count_reg, 54 StackArgumentsAccessorReceiverMode receiver_mode = 55 ARGUMENTS_CONTAIN_RECEIVER, 56 int extra_displacement_to_last_argument = 0) base_reg_(base_reg)57 : base_reg_(base_reg), 58 argument_count_reg_(argument_count_reg), 59 argument_count_immediate_(0), 60 receiver_mode_(receiver_mode), 61 extra_displacement_to_last_argument_( 62 extra_displacement_to_last_argument) { } 63 64 StackArgumentsAccessor( 65 Register base_reg, 66 const ParameterCount& parameter_count, 67 StackArgumentsAccessorReceiverMode receiver_mode = 68 ARGUMENTS_CONTAIN_RECEIVER, 69 int extra_displacement_to_last_argument = 0) base_reg_(base_reg)70 : base_reg_(base_reg), 71 argument_count_reg_(parameter_count.is_reg() ? 72 parameter_count.reg() : no_reg), 73 argument_count_immediate_(parameter_count.is_immediate() ? 74 parameter_count.immediate() : 0), 75 receiver_mode_(receiver_mode), 76 extra_displacement_to_last_argument_( 77 extra_displacement_to_last_argument) { } 78 79 Operand GetArgumentOperand(int index); GetReceiverOperand()80 Operand GetReceiverOperand() { 81 DCHECK(receiver_mode_ == ARGUMENTS_CONTAIN_RECEIVER); 82 return GetArgumentOperand(0); 83 } 84 85 private: 86 const Register base_reg_; 87 const Register argument_count_reg_; 88 const int argument_count_immediate_; 89 const StackArgumentsAccessorReceiverMode receiver_mode_; 90 const int extra_displacement_to_last_argument_; 91 92 DISALLOW_IMPLICIT_CONSTRUCTORS(StackArgumentsAccessor); 93 }; 94 95 96 } // namespace internal 97 } // namespace v8 98 99 #endif // V8_X64_CODEGEN_X64_H_ 100