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1 // Copyright 2009 the V8 project authors. All rights reserved. | 1 // Copyright 2009 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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166 *call_object_address() = target; | 166 *call_object_address() = target; |
167 } | 167 } |
168 | 168 |
169 | 169 |
170 Object** RelocInfo::call_object_address() { | 170 Object** RelocInfo::call_object_address() { |
171 UNIMPLEMENTED(); // IA32 code below. | 171 UNIMPLEMENTED(); // IA32 code below. |
172 ASSERT(IsCallInstruction()); | 172 ASSERT(IsCallInstruction()); |
173 return reinterpret_cast<Object**>(pc_ + 1); | 173 return reinterpret_cast<Object**>(pc_ + 1); |
174 } | 174 } |
175 | 175 |
| 176 // ----------------------------------------------------------------------------- |
| 177 // Implementation of Operand |
| 178 |
| 179 Operand::Operand(Register base, int32_t disp) { |
| 180 len_ = 1; |
| 181 if (base.is(rsp) || base.is(r12)) { |
| 182 // SIB byte is needed to encode (rsp + offset) or (r12 + offset). |
| 183 set_sib(times_1, rsp, base); |
| 184 } |
| 185 |
| 186 if (disp == 0 && !base.is(rbp) && !base.is(r13)) { |
| 187 set_modrm(0, rsp); |
| 188 } else if (is_int8(disp)) { |
| 189 set_modrm(1, base); |
| 190 set_disp8(disp); |
| 191 } else { |
| 192 set_modrm(2, base); |
| 193 set_disp32(disp); |
| 194 } |
| 195 } |
176 | 196 |
177 void Operand::set_modrm(int mod, Register rm) { | 197 void Operand::set_modrm(int mod, Register rm) { |
178 ASSERT((mod & -4) == 0); | 198 ASSERT((mod & -4) == 0); |
179 buf_[0] = mod << 6 | (rm.code() & 0x7); | 199 buf_[0] = mod << 6 | (rm.code() & 0x7); |
180 // Set REX.B to the high bit of rm.code(). | 200 // Set REX.B to the high bit of rm.code(). |
181 rex_ |= (rm.code() >> 3); | 201 rex_ |= (rm.code() >> 3); |
182 len_ = 1; | |
183 } | 202 } |
184 | 203 |
185 | 204 |
186 void Operand::set_sib(ScaleFactor scale, Register index, Register base) { | 205 void Operand::set_sib(ScaleFactor scale, Register index, Register base) { |
187 ASSERT(len_ == 1); | 206 ASSERT(len_ == 1); |
188 ASSERT((scale & -4) == 0); | 207 ASSERT((scale & -4) == 0); |
189 // Use SIB with no index register only for base rsp or r12. | 208 // Use SIB with no index register only for base rsp or r12. |
190 ASSERT(!index.is(rsp) || base.is(rsp) || base.is(r12)); | 209 ASSERT(!index.is(rsp) || base.is(rsp) || base.is(r12)); |
191 buf_[1] = scale << 6 | (index.code() & 0x7) << 3 | (base.code() & 0x7); | 210 buf_[1] = scale << 6 | (index.code() & 0x7) << 3 | (base.code() & 0x7); |
192 rex_ |= (index.code() >> 3) << 1 | base.code() >> 3; | 211 rex_ |= (index.code() >> 3) << 1 | base.code() >> 3; |
193 len_ = 2; | 212 len_ = 2; |
194 } | 213 } |
195 | 214 |
| 215 void Operand::set_disp8(int disp) { |
| 216 ASSERT(is_int8(disp)); |
| 217 ASSERT(len_ == 1 || len_ == 2); |
| 218 int8_t* p = reinterpret_cast<int8_t*>(&buf_[len_]); |
| 219 *p = disp; |
| 220 len_ += sizeof(int8_t); |
| 221 } |
196 | 222 |
197 void Operand::set_disp32(int32_t disp) { | 223 void Operand::set_disp32(int disp) { |
198 ASSERT(len_ == 1 || len_ == 2); | 224 ASSERT(len_ == 1 || len_ == 2); |
199 int32_t* p = reinterpret_cast<int32_t*>(&buf_[len_]); | 225 int32_t* p = reinterpret_cast<int32_t*>(&buf_[len_]); |
200 *p = disp; | 226 *p = disp; |
201 len_ += sizeof(int32_t); | 227 len_ += sizeof(int32_t); |
202 } | 228 } |
203 | 229 |
204 | 230 |
205 Operand::Operand(Register reg) { | |
206 // reg | |
207 set_modrm(3, reg); | |
208 } | |
209 | |
210 } } // namespace v8::internal | 231 } } // namespace v8::internal |
211 | 232 |
212 #endif // V8_X64_ASSEMBLER_X64_INL_H_ | 233 #endif // V8_X64_ASSEMBLER_X64_INL_H_ |
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