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| 1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 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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| 160 #define __ masm()-> | 160 #define __ masm()-> |
| 161 | 161 |
| 162 void Deoptimizer::EntryGenerator::Generate() { | 162 void Deoptimizer::EntryGenerator::Generate() { |
| 163 GeneratePrologue(); | 163 GeneratePrologue(); |
| 164 | 164 |
| 165 // Save all general purpose registers before messing with them. | 165 // Save all general purpose registers before messing with them. |
| 166 const int kNumberOfRegisters = Register::kNumRegisters; | 166 const int kNumberOfRegisters = Register::kNumRegisters; |
| 167 | 167 |
| 168 const int kDoubleRegsSize = kDoubleSize * | 168 const int kDoubleRegsSize = kDoubleSize * |
| 169 XMMRegister::NumAllocatableRegisters(); | 169 XMMRegister::NumAllocatableRegisters(); |
| 170 __ subq(rsp, Immediate(kDoubleRegsSize)); | 170 __ subp(rsp, Immediate(kDoubleRegsSize)); |
| 171 | 171 |
| 172 for (int i = 0; i < XMMRegister::NumAllocatableRegisters(); ++i) { | 172 for (int i = 0; i < XMMRegister::NumAllocatableRegisters(); ++i) { |
| 173 XMMRegister xmm_reg = XMMRegister::FromAllocationIndex(i); | 173 XMMRegister xmm_reg = XMMRegister::FromAllocationIndex(i); |
| 174 int offset = i * kDoubleSize; | 174 int offset = i * kDoubleSize; |
| 175 __ movsd(Operand(rsp, offset), xmm_reg); | 175 __ movsd(Operand(rsp, offset), xmm_reg); |
| 176 } | 176 } |
| 177 | 177 |
| 178 // We push all registers onto the stack, even though we do not need | 178 // We push all registers onto the stack, even though we do not need |
| 179 // to restore all later. | 179 // to restore all later. |
| 180 for (int i = 0; i < kNumberOfRegisters; i++) { | 180 for (int i = 0; i < kNumberOfRegisters; i++) { |
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| 192 | 192 |
| 193 // Get the bailout id from the stack. | 193 // Get the bailout id from the stack. |
| 194 __ movp(arg_reg_3, Operand(rsp, kSavedRegistersAreaSize)); | 194 __ movp(arg_reg_3, Operand(rsp, kSavedRegistersAreaSize)); |
| 195 | 195 |
| 196 // Get the address of the location in the code object | 196 // Get the address of the location in the code object |
| 197 // and compute the fp-to-sp delta in register arg5. | 197 // and compute the fp-to-sp delta in register arg5. |
| 198 __ movp(arg_reg_4, Operand(rsp, kSavedRegistersAreaSize + 1 * kRegisterSize)); | 198 __ movp(arg_reg_4, Operand(rsp, kSavedRegistersAreaSize + 1 * kRegisterSize)); |
| 199 __ lea(arg5, Operand(rsp, kSavedRegistersAreaSize + 1 * kRegisterSize + | 199 __ lea(arg5, Operand(rsp, kSavedRegistersAreaSize + 1 * kRegisterSize + |
| 200 kPCOnStackSize)); | 200 kPCOnStackSize)); |
| 201 | 201 |
| 202 __ subq(arg5, rbp); | 202 __ subp(arg5, rbp); |
| 203 __ neg(arg5); | 203 __ neg(arg5); |
| 204 | 204 |
| 205 // Allocate a new deoptimizer object. | 205 // Allocate a new deoptimizer object. |
| 206 __ PrepareCallCFunction(6); | 206 __ PrepareCallCFunction(6); |
| 207 __ movp(rax, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset)); | 207 __ movp(rax, Operand(rbp, JavaScriptFrameConstants::kFunctionOffset)); |
| 208 __ movp(arg_reg_1, rax); | 208 __ movp(arg_reg_1, rax); |
| 209 __ Set(arg_reg_2, type()); | 209 __ Set(arg_reg_2, type()); |
| 210 // Args 3 and 4 are already in the right registers. | 210 // Args 3 and 4 are already in the right registers. |
| 211 | 211 |
| 212 // On windows put the arguments on the stack (PrepareCallCFunction | 212 // On windows put the arguments on the stack (PrepareCallCFunction |
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| 234 } | 234 } |
| 235 | 235 |
| 236 // Fill in the double input registers. | 236 // Fill in the double input registers. |
| 237 int double_regs_offset = FrameDescription::double_registers_offset(); | 237 int double_regs_offset = FrameDescription::double_registers_offset(); |
| 238 for (int i = 0; i < XMMRegister::NumAllocatableRegisters(); i++) { | 238 for (int i = 0; i < XMMRegister::NumAllocatableRegisters(); i++) { |
| 239 int dst_offset = i * kDoubleSize + double_regs_offset; | 239 int dst_offset = i * kDoubleSize + double_regs_offset; |
| 240 __ popq(Operand(rbx, dst_offset)); | 240 __ popq(Operand(rbx, dst_offset)); |
| 241 } | 241 } |
| 242 | 242 |
| 243 // Remove the bailout id and return address from the stack. | 243 // Remove the bailout id and return address from the stack. |
| 244 __ addq(rsp, Immediate(1 * kRegisterSize + kPCOnStackSize)); | 244 __ addp(rsp, Immediate(1 * kRegisterSize + kPCOnStackSize)); |
| 245 | 245 |
| 246 // Compute a pointer to the unwinding limit in register rcx; that is | 246 // Compute a pointer to the unwinding limit in register rcx; that is |
| 247 // the first stack slot not part of the input frame. | 247 // the first stack slot not part of the input frame. |
| 248 __ movp(rcx, Operand(rbx, FrameDescription::frame_size_offset())); | 248 __ movp(rcx, Operand(rbx, FrameDescription::frame_size_offset())); |
| 249 __ addq(rcx, rsp); | 249 __ addp(rcx, rsp); |
| 250 | 250 |
| 251 // Unwind the stack down to - but not including - the unwinding | 251 // Unwind the stack down to - but not including - the unwinding |
| 252 // limit and copy the contents of the activation frame to the input | 252 // limit and copy the contents of the activation frame to the input |
| 253 // frame description. | 253 // frame description. |
| 254 __ lea(rdx, Operand(rbx, FrameDescription::frame_content_offset())); | 254 __ lea(rdx, Operand(rbx, FrameDescription::frame_content_offset())); |
| 255 Label pop_loop_header; | 255 Label pop_loop_header; |
| 256 __ jmp(&pop_loop_header); | 256 __ jmp(&pop_loop_header); |
| 257 Label pop_loop; | 257 Label pop_loop; |
| 258 __ bind(&pop_loop); | 258 __ bind(&pop_loop); |
| 259 __ Pop(Operand(rdx, 0)); | 259 __ Pop(Operand(rdx, 0)); |
| 260 __ addq(rdx, Immediate(sizeof(intptr_t))); | 260 __ addp(rdx, Immediate(sizeof(intptr_t))); |
| 261 __ bind(&pop_loop_header); | 261 __ bind(&pop_loop_header); |
| 262 __ cmpq(rcx, rsp); | 262 __ cmpq(rcx, rsp); |
| 263 __ j(not_equal, &pop_loop); | 263 __ j(not_equal, &pop_loop); |
| 264 | 264 |
| 265 // Compute the output frame in the deoptimizer. | 265 // Compute the output frame in the deoptimizer. |
| 266 __ pushq(rax); | 266 __ pushq(rax); |
| 267 __ PrepareCallCFunction(2); | 267 __ PrepareCallCFunction(2); |
| 268 __ movp(arg_reg_1, rax); | 268 __ movp(arg_reg_1, rax); |
| 269 __ LoadAddress(arg_reg_2, ExternalReference::isolate_address(isolate())); | 269 __ LoadAddress(arg_reg_2, ExternalReference::isolate_address(isolate())); |
| 270 { | 270 { |
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| 282 __ movl(rdx, Operand(rax, Deoptimizer::output_count_offset())); | 282 __ movl(rdx, Operand(rax, Deoptimizer::output_count_offset())); |
| 283 __ movp(rax, Operand(rax, Deoptimizer::output_offset())); | 283 __ movp(rax, Operand(rax, Deoptimizer::output_offset())); |
| 284 __ lea(rdx, Operand(rax, rdx, times_pointer_size, 0)); | 284 __ lea(rdx, Operand(rax, rdx, times_pointer_size, 0)); |
| 285 __ jmp(&outer_loop_header); | 285 __ jmp(&outer_loop_header); |
| 286 __ bind(&outer_push_loop); | 286 __ bind(&outer_push_loop); |
| 287 // Inner loop state: rbx = current FrameDescription*, rcx = loop index. | 287 // Inner loop state: rbx = current FrameDescription*, rcx = loop index. |
| 288 __ movp(rbx, Operand(rax, 0)); | 288 __ movp(rbx, Operand(rax, 0)); |
| 289 __ movp(rcx, Operand(rbx, FrameDescription::frame_size_offset())); | 289 __ movp(rcx, Operand(rbx, FrameDescription::frame_size_offset())); |
| 290 __ jmp(&inner_loop_header); | 290 __ jmp(&inner_loop_header); |
| 291 __ bind(&inner_push_loop); | 291 __ bind(&inner_push_loop); |
| 292 __ subq(rcx, Immediate(sizeof(intptr_t))); | 292 __ subp(rcx, Immediate(sizeof(intptr_t))); |
| 293 __ Push(Operand(rbx, rcx, times_1, FrameDescription::frame_content_offset())); | 293 __ Push(Operand(rbx, rcx, times_1, FrameDescription::frame_content_offset())); |
| 294 __ bind(&inner_loop_header); | 294 __ bind(&inner_loop_header); |
| 295 __ testq(rcx, rcx); | 295 __ testq(rcx, rcx); |
| 296 __ j(not_zero, &inner_push_loop); | 296 __ j(not_zero, &inner_push_loop); |
| 297 __ addq(rax, Immediate(kPointerSize)); | 297 __ addp(rax, Immediate(kPointerSize)); |
| 298 __ bind(&outer_loop_header); | 298 __ bind(&outer_loop_header); |
| 299 __ cmpq(rax, rdx); | 299 __ cmpq(rax, rdx); |
| 300 __ j(below, &outer_push_loop); | 300 __ j(below, &outer_push_loop); |
| 301 | 301 |
| 302 for (int i = 0; i < XMMRegister::NumAllocatableRegisters(); ++i) { | 302 for (int i = 0; i < XMMRegister::NumAllocatableRegisters(); ++i) { |
| 303 XMMRegister xmm_reg = XMMRegister::FromAllocationIndex(i); | 303 XMMRegister xmm_reg = XMMRegister::FromAllocationIndex(i); |
| 304 int src_offset = i * kDoubleSize + double_regs_offset; | 304 int src_offset = i * kDoubleSize + double_regs_offset; |
| 305 __ movsd(xmm_reg, Operand(rbx, src_offset)); | 305 __ movsd(xmm_reg, Operand(rbx, src_offset)); |
| 306 } | 306 } |
| 307 | 307 |
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| 366 UNREACHABLE(); | 366 UNREACHABLE(); |
| 367 } | 367 } |
| 368 | 368 |
| 369 | 369 |
| 370 #undef __ | 370 #undef __ |
| 371 | 371 |
| 372 | 372 |
| 373 } } // namespace v8::internal | 373 } } // namespace v8::internal |
| 374 | 374 |
| 375 #endif // V8_TARGET_ARCH_X64 | 375 #endif // V8_TARGET_ARCH_X64 |
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