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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #include "vm/globals.h" | 5 #include "vm/globals.h" |
6 #if defined(TARGET_ARCH_X64) | 6 #if defined(TARGET_ARCH_X64) |
7 | 7 |
8 #include "vm/assembler.h" | 8 #include "vm/assembler.h" |
9 #include "vm/compiler.h" | 9 #include "vm/compiler.h" |
10 #include "vm/dart_entry.h" | 10 #include "vm/dart_entry.h" |
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380 __ LeaveFrame(); | 380 __ LeaveFrame(); |
381 __ movq(RBP, RAX); | 381 __ movq(RBP, RAX); |
382 | 382 |
383 // Frame is fully rewritten at this point and it is safe to perform a GC. | 383 // Frame is fully rewritten at this point and it is safe to perform a GC. |
384 // Materialize any objects that were deferred by FillFrame because they | 384 // Materialize any objects that were deferred by FillFrame because they |
385 // require allocation. | 385 // require allocation. |
386 __ EnterStubFrame(); | 386 __ EnterStubFrame(); |
387 if (preserve_rax) { | 387 if (preserve_rax) { |
388 __ pushq(RBX); // Preserve result, it will be GC-d here. | 388 __ pushq(RBX); // Preserve result, it will be GC-d here. |
389 } | 389 } |
390 __ CallRuntime(kDeoptimizeMaterializeDoublesRuntimeEntry); | 390 __ pushq(Immediate(Smi::RawValue(0))); // Space for the result. |
| 391 __ CallRuntime(kDeoptimizeMaterializeRuntimeEntry); |
| 392 // Result tells stub how many bytes to remove from the expression stack |
| 393 // of the bottom-most frame. They were used as materialization arguments. |
| 394 __ popq(RBX); |
| 395 __ SmiUntag(RBX); |
391 if (preserve_rax) { | 396 if (preserve_rax) { |
392 __ popq(RAX); // Restore result. | 397 __ popq(RAX); // Restore result. |
393 } | 398 } |
394 __ LeaveFrame(); | 399 __ LeaveFrame(); |
395 | 400 |
| 401 __ popq(RCX); // Pop return address. |
| 402 __ addq(RSP, RBX); // Remove materialization arguments. |
| 403 __ pushq(RCX); // Push return address. |
396 __ ret(); | 404 __ ret(); |
397 } | 405 } |
398 | 406 |
399 | 407 |
400 // TOS: return address + call-instruction-size (5 bytes). | 408 // TOS: return address + call-instruction-size (5 bytes). |
401 // RAX: result, must be preserved | 409 // RAX: result, must be preserved |
402 void StubCode::GenerateDeoptimizeLazyStub(Assembler* assembler) { | 410 void StubCode::GenerateDeoptimizeLazyStub(Assembler* assembler) { |
403 // Correct return address to point just after the call that is being | 411 // Correct return address to point just after the call that is being |
404 // deoptimized. | 412 // deoptimized. |
405 __ popq(RBX); | 413 __ popq(RBX); |
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2066 __ cmpq(left, right); | 2074 __ cmpq(left, right); |
2067 __ Bind(&done); | 2075 __ Bind(&done); |
2068 __ popq(right); | 2076 __ popq(right); |
2069 __ popq(left); | 2077 __ popq(left); |
2070 __ ret(); | 2078 __ ret(); |
2071 } | 2079 } |
2072 | 2080 |
2073 } // namespace dart | 2081 } // namespace dart |
2074 | 2082 |
2075 #endif // defined TARGET_ARCH_X64 | 2083 #endif // defined TARGET_ARCH_X64 |
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