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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 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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141 #define __ masm()-> | 141 #define __ masm()-> |
142 | 142 |
143 void Deoptimizer::EntryGenerator::Generate() { | 143 void Deoptimizer::EntryGenerator::Generate() { |
144 GeneratePrologue(); | 144 GeneratePrologue(); |
145 | 145 |
146 // TODO(all): This code needs to be revisited. We probably only need to save | 146 // TODO(all): This code needs to be revisited. We probably only need to save |
147 // caller-saved registers here. Callee-saved registers can be stored directly | 147 // caller-saved registers here. Callee-saved registers can be stored directly |
148 // in the input frame. | 148 // in the input frame. |
149 | 149 |
150 // Save all allocatable floating point registers. | 150 // Save all allocatable floating point registers. |
151 CPURegList saved_fp_registers(CPURegister::kFPRegister, kDRegSize, | 151 CPURegList saved_fp_registers(CPURegister::kFPRegister, kDRegSizeInBits, |
152 0, FPRegister::NumAllocatableRegisters() - 1); | 152 0, FPRegister::NumAllocatableRegisters() - 1); |
153 __ PushCPURegList(saved_fp_registers); | 153 __ PushCPURegList(saved_fp_registers); |
154 | 154 |
155 // We save all the registers expcept jssp, sp and lr. | 155 // We save all the registers expcept jssp, sp and lr. |
156 CPURegList saved_registers(CPURegister::kRegister, kXRegSize, 0, 27); | 156 CPURegList saved_registers(CPURegister::kRegister, kXRegSizeInBits, 0, 27); |
157 saved_registers.Combine(fp); | 157 saved_registers.Combine(fp); |
158 __ PushCPURegList(saved_registers); | 158 __ PushCPURegList(saved_registers); |
159 | 159 |
160 const int kSavedRegistersAreaSize = | 160 const int kSavedRegistersAreaSize = |
161 (saved_registers.Count() * kXRegSizeInBytes) + | 161 (saved_registers.Count() * kXRegSize) + |
162 (saved_fp_registers.Count() * kDRegSizeInBytes); | 162 (saved_fp_registers.Count() * kDRegSize); |
163 | 163 |
164 // Floating point registers are saved on the stack above core registers. | 164 // Floating point registers are saved on the stack above core registers. |
165 const int kFPRegistersOffset = saved_registers.Count() * kXRegSizeInBytes; | 165 const int kFPRegistersOffset = saved_registers.Count() * kXRegSize; |
166 | 166 |
167 // Get the bailout id from the stack. | 167 // Get the bailout id from the stack. |
168 Register bailout_id = x2; | 168 Register bailout_id = x2; |
169 __ Peek(bailout_id, kSavedRegistersAreaSize); | 169 __ Peek(bailout_id, kSavedRegistersAreaSize); |
170 | 170 |
171 Register code_object = x3; | 171 Register code_object = x3; |
172 Register fp_to_sp = x4; | 172 Register fp_to_sp = x4; |
173 // Get the address of the location in the code object. This is the return | 173 // Get the address of the location in the code object. This is the return |
174 // address for lazy deoptimization. | 174 // address for lazy deoptimization. |
175 __ Mov(code_object, lr); | 175 __ Mov(code_object, lr); |
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214 for (int i = 0; i < saved_fp_registers.Count(); i++) { | 214 for (int i = 0; i < saved_fp_registers.Count(); i++) { |
215 // TODO(all): Look for opportunities to optimize this by using ldp/stp. | 215 // TODO(all): Look for opportunities to optimize this by using ldp/stp. |
216 int dst_offset = FrameDescription::double_registers_offset() + | 216 int dst_offset = FrameDescription::double_registers_offset() + |
217 (i * kDoubleSize); | 217 (i * kDoubleSize); |
218 int src_offset = kFPRegistersOffset + (i * kDoubleSize); | 218 int src_offset = kFPRegistersOffset + (i * kDoubleSize); |
219 __ Peek(x2, src_offset); | 219 __ Peek(x2, src_offset); |
220 __ Str(x2, MemOperand(x1, dst_offset)); | 220 __ Str(x2, MemOperand(x1, dst_offset)); |
221 } | 221 } |
222 | 222 |
223 // Remove the bailout id and the saved registers from the stack. | 223 // Remove the bailout id and the saved registers from the stack. |
224 __ Drop(1 + (kSavedRegistersAreaSize / kXRegSizeInBytes)); | 224 __ Drop(1 + (kSavedRegistersAreaSize / kXRegSize)); |
225 | 225 |
226 // Compute a pointer to the unwinding limit in register x2; that is | 226 // Compute a pointer to the unwinding limit in register x2; that is |
227 // the first stack slot not part of the input frame. | 227 // the first stack slot not part of the input frame. |
228 Register unwind_limit = x2; | 228 Register unwind_limit = x2; |
229 __ Ldr(unwind_limit, MemOperand(x1, FrameDescription::frame_size_offset())); | 229 __ Ldr(unwind_limit, MemOperand(x1, FrameDescription::frame_size_offset())); |
230 __ Add(unwind_limit, unwind_limit, __ StackPointer()); | 230 __ Add(unwind_limit, unwind_limit, __ StackPointer()); |
231 | 231 |
232 // Unwind the stack down to - but not including - the unwinding | 232 // Unwind the stack down to - but not including - the unwinding |
233 // limit and copy the contents of the activation frame to the input | 233 // limit and copy the contents of the activation frame to the input |
234 // frame description. | 234 // frame description. |
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373 | 373 |
374 | 374 |
375 void FrameDescription::SetCallerFp(unsigned offset, intptr_t value) { | 375 void FrameDescription::SetCallerFp(unsigned offset, intptr_t value) { |
376 SetFrameSlot(offset, value); | 376 SetFrameSlot(offset, value); |
377 } | 377 } |
378 | 378 |
379 | 379 |
380 #undef __ | 380 #undef __ |
381 | 381 |
382 } } // namespace v8::internal | 382 } } // namespace v8::internal |
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