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| 1 // Copyright (c) 1994-2006 Sun Microsystems Inc. | 1 // Copyright (c) 1994-2006 Sun Microsystems Inc. |
| 2 // All Rights Reserved. | 2 // All Rights Reserved. |
| 3 // | 3 // |
| 4 // Redistribution and use in source and binary forms, with or without | 4 // Redistribution and use in source and binary forms, with or without |
| 5 // modification, are permitted provided that the following conditions are | 5 // modification, are permitted provided that the following conditions are |
| 6 // met: | 6 // met: |
| 7 // | 7 // |
| 8 // - Redistributions of source code must retain the above copyright notice, | 8 // - Redistributions of source code must retain the above copyright notice, |
| 9 // this list of conditions and the following disclaimer. | 9 // this list of conditions and the following disclaimer. |
| 10 // | 10 // |
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| 71 } | 71 } |
| 72 static const int kNumRegisters = 8; | 72 static const int kNumRegisters = 8; |
| 73 | 73 |
| 74 static inline const char* AllocationIndexToString(int index); | 74 static inline const char* AllocationIndexToString(int index); |
| 75 | 75 |
| 76 static inline int ToAllocationIndex(Register reg); | 76 static inline int ToAllocationIndex(Register reg); |
| 77 | 77 |
| 78 static inline Register FromAllocationIndex(int index); | 78 static inline Register FromAllocationIndex(int index); |
| 79 | 79 |
| 80 static Register from_code(int code) { | 80 static Register from_code(int code) { |
| 81 ASSERT(code >= 0); | 81 DCHECK(code >= 0); |
| 82 ASSERT(code < kNumRegisters); | 82 DCHECK(code < kNumRegisters); |
| 83 Register r = { code }; | 83 Register r = { code }; |
| 84 return r; | 84 return r; |
| 85 } | 85 } |
| 86 bool is_valid() const { return 0 <= code_ && code_ < kNumRegisters; } | 86 bool is_valid() const { return 0 <= code_ && code_ < kNumRegisters; } |
| 87 bool is(Register reg) const { return code_ == reg.code_; } | 87 bool is(Register reg) const { return code_ == reg.code_; } |
| 88 // eax, ebx, ecx and edx are byte registers, the rest are not. | 88 // eax, ebx, ecx and edx are byte registers, the rest are not. |
| 89 bool is_byte_register() const { return code_ <= 3; } | 89 bool is_byte_register() const { return code_ <= 3; } |
| 90 int code() const { | 90 int code() const { |
| 91 ASSERT(is_valid()); | 91 DCHECK(is_valid()); |
| 92 return code_; | 92 return code_; |
| 93 } | 93 } |
| 94 int bit() const { | 94 int bit() const { |
| 95 ASSERT(is_valid()); | 95 DCHECK(is_valid()); |
| 96 return 1 << code_; | 96 return 1 << code_; |
| 97 } | 97 } |
| 98 | 98 |
| 99 // Unfortunately we can't make this private in a struct. | 99 // Unfortunately we can't make this private in a struct. |
| 100 int code_; | 100 int code_; |
| 101 }; | 101 }; |
| 102 | 102 |
| 103 const int kRegister_eax_Code = 0; | 103 const int kRegister_eax_Code = 0; |
| 104 const int kRegister_ecx_Code = 1; | 104 const int kRegister_ecx_Code = 1; |
| 105 const int kRegister_edx_Code = 2; | 105 const int kRegister_edx_Code = 2; |
| 106 const int kRegister_ebx_Code = 3; | 106 const int kRegister_ebx_Code = 3; |
| 107 const int kRegister_esp_Code = 4; | 107 const int kRegister_esp_Code = 4; |
| 108 const int kRegister_ebp_Code = 5; | 108 const int kRegister_ebp_Code = 5; |
| 109 const int kRegister_esi_Code = 6; | 109 const int kRegister_esi_Code = 6; |
| 110 const int kRegister_edi_Code = 7; | 110 const int kRegister_edi_Code = 7; |
| 111 const int kRegister_no_reg_Code = -1; | 111 const int kRegister_no_reg_Code = -1; |
| 112 | 112 |
| 113 const Register eax = { kRegister_eax_Code }; | 113 const Register eax = { kRegister_eax_Code }; |
| 114 const Register ecx = { kRegister_ecx_Code }; | 114 const Register ecx = { kRegister_ecx_Code }; |
| 115 const Register edx = { kRegister_edx_Code }; | 115 const Register edx = { kRegister_edx_Code }; |
| 116 const Register ebx = { kRegister_ebx_Code }; | 116 const Register ebx = { kRegister_ebx_Code }; |
| 117 const Register esp = { kRegister_esp_Code }; | 117 const Register esp = { kRegister_esp_Code }; |
| 118 const Register ebp = { kRegister_ebp_Code }; | 118 const Register ebp = { kRegister_ebp_Code }; |
| 119 const Register esi = { kRegister_esi_Code }; | 119 const Register esi = { kRegister_esi_Code }; |
| 120 const Register edi = { kRegister_edi_Code }; | 120 const Register edi = { kRegister_edi_Code }; |
| 121 const Register no_reg = { kRegister_no_reg_Code }; | 121 const Register no_reg = { kRegister_no_reg_Code }; |
| 122 | 122 |
| 123 | 123 |
| 124 inline const char* Register::AllocationIndexToString(int index) { | 124 inline const char* Register::AllocationIndexToString(int index) { |
| 125 ASSERT(index >= 0 && index < kMaxNumAllocatableRegisters); | 125 DCHECK(index >= 0 && index < kMaxNumAllocatableRegisters); |
| 126 // This is the mapping of allocation indices to registers. | 126 // This is the mapping of allocation indices to registers. |
| 127 const char* const kNames[] = { "eax", "ecx", "edx", "ebx", "esi", "edi" }; | 127 const char* const kNames[] = { "eax", "ecx", "edx", "ebx", "esi", "edi" }; |
| 128 return kNames[index]; | 128 return kNames[index]; |
| 129 } | 129 } |
| 130 | 130 |
| 131 | 131 |
| 132 inline int Register::ToAllocationIndex(Register reg) { | 132 inline int Register::ToAllocationIndex(Register reg) { |
| 133 ASSERT(reg.is_valid() && !reg.is(esp) && !reg.is(ebp)); | 133 DCHECK(reg.is_valid() && !reg.is(esp) && !reg.is(ebp)); |
| 134 return (reg.code() >= 6) ? reg.code() - 2 : reg.code(); | 134 return (reg.code() >= 6) ? reg.code() - 2 : reg.code(); |
| 135 } | 135 } |
| 136 | 136 |
| 137 | 137 |
| 138 inline Register Register::FromAllocationIndex(int index) { | 138 inline Register Register::FromAllocationIndex(int index) { |
| 139 ASSERT(index >= 0 && index < kMaxNumAllocatableRegisters); | 139 DCHECK(index >= 0 && index < kMaxNumAllocatableRegisters); |
| 140 return (index >= 4) ? from_code(index + 2) : from_code(index); | 140 return (index >= 4) ? from_code(index + 2) : from_code(index); |
| 141 } | 141 } |
| 142 | 142 |
| 143 | 143 |
| 144 struct X87Register { | 144 struct X87Register { |
| 145 static const int kMaxNumAllocatableRegisters = 8; | 145 static const int kMaxNumAllocatableRegisters = 8; |
| 146 static const int kMaxNumRegisters = 8; | 146 static const int kMaxNumRegisters = 8; |
| 147 static int NumAllocatableRegisters() { | 147 static int NumAllocatableRegisters() { |
| 148 return kMaxNumAllocatableRegisters; | 148 return kMaxNumAllocatableRegisters; |
| 149 } | 149 } |
| 150 | 150 |
| 151 static int ToAllocationIndex(X87Register reg) { | 151 static int ToAllocationIndex(X87Register reg) { |
| 152 return reg.code_; | 152 return reg.code_; |
| 153 } | 153 } |
| 154 | 154 |
| 155 static const char* AllocationIndexToString(int index) { | 155 static const char* AllocationIndexToString(int index) { |
| 156 ASSERT(index >= 0 && index < kMaxNumAllocatableRegisters); | 156 DCHECK(index >= 0 && index < kMaxNumAllocatableRegisters); |
| 157 const char* const names[] = { | 157 const char* const names[] = { |
| 158 "stX_0", "stX_1", "stX_2", "stX_3", "stX_4", | 158 "stX_0", "stX_1", "stX_2", "stX_3", "stX_4", |
| 159 "stX_5", "stX_6", "stX_7" | 159 "stX_5", "stX_6", "stX_7" |
| 160 }; | 160 }; |
| 161 return names[index]; | 161 return names[index]; |
| 162 } | 162 } |
| 163 | 163 |
| 164 static X87Register FromAllocationIndex(int index) { | 164 static X87Register FromAllocationIndex(int index) { |
| 165 ASSERT(index >= 0 && index < kMaxNumAllocatableRegisters); | 165 DCHECK(index >= 0 && index < kMaxNumAllocatableRegisters); |
| 166 X87Register result; | 166 X87Register result; |
| 167 result.code_ = index; | 167 result.code_ = index; |
| 168 return result; | 168 return result; |
| 169 } | 169 } |
| 170 | 170 |
| 171 bool is_valid() const { | 171 bool is_valid() const { |
| 172 return 0 <= code_ && code_ < kMaxNumRegisters; | 172 return 0 <= code_ && code_ < kMaxNumRegisters; |
| 173 } | 173 } |
| 174 | 174 |
| 175 int code() const { | 175 int code() const { |
| 176 ASSERT(is_valid()); | 176 DCHECK(is_valid()); |
| 177 return code_; | 177 return code_; |
| 178 } | 178 } |
| 179 | 179 |
| 180 bool is(X87Register reg) const { | 180 bool is(X87Register reg) const { |
| 181 return code_ == reg.code_; | 181 return code_ == reg.code_; |
| 182 } | 182 } |
| 183 | 183 |
| 184 int code_; | 184 int code_; |
| 185 }; | 185 }; |
| 186 | 186 |
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| 1027 explicit EnsureSpace(Assembler* assembler) : assembler_(assembler) { | 1027 explicit EnsureSpace(Assembler* assembler) : assembler_(assembler) { |
| 1028 if (assembler_->buffer_overflow()) assembler_->GrowBuffer(); | 1028 if (assembler_->buffer_overflow()) assembler_->GrowBuffer(); |
| 1029 #ifdef DEBUG | 1029 #ifdef DEBUG |
| 1030 space_before_ = assembler_->available_space(); | 1030 space_before_ = assembler_->available_space(); |
| 1031 #endif | 1031 #endif |
| 1032 } | 1032 } |
| 1033 | 1033 |
| 1034 #ifdef DEBUG | 1034 #ifdef DEBUG |
| 1035 ~EnsureSpace() { | 1035 ~EnsureSpace() { |
| 1036 int bytes_generated = space_before_ - assembler_->available_space(); | 1036 int bytes_generated = space_before_ - assembler_->available_space(); |
| 1037 ASSERT(bytes_generated < assembler_->kGap); | 1037 DCHECK(bytes_generated < assembler_->kGap); |
| 1038 } | 1038 } |
| 1039 #endif | 1039 #endif |
| 1040 | 1040 |
| 1041 private: | 1041 private: |
| 1042 Assembler* assembler_; | 1042 Assembler* assembler_; |
| 1043 #ifdef DEBUG | 1043 #ifdef DEBUG |
| 1044 int space_before_; | 1044 int space_before_; |
| 1045 #endif | 1045 #endif |
| 1046 }; | 1046 }; |
| 1047 | 1047 |
| 1048 } } // namespace v8::internal | 1048 } } // namespace v8::internal |
| 1049 | 1049 |
| 1050 #endif // V8_X87_ASSEMBLER_X87_H_ | 1050 #endif // V8_X87_ASSEMBLER_X87_H_ |
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