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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 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #if V8_TARGET_ARCH_ARM64 | 5 #if V8_TARGET_ARCH_ARM64 |
6 | 6 |
7 #include "src/arm64/frames-arm64.h" | 7 #include "src/arm64/frames-arm64.h" |
8 #include "src/codegen.h" | 8 #include "src/codegen.h" |
9 #include "src/debug/debug.h" | 9 #include "src/debug/debug.h" |
10 #include "src/deoptimizer.h" | 10 #include "src/deoptimizer.h" |
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1439 | 1439 |
1440 void Builtins::Generate_InstantiateAsmJs(MacroAssembler* masm) { | 1440 void Builtins::Generate_InstantiateAsmJs(MacroAssembler* masm) { |
1441 // ----------- S t a t e ------------- | 1441 // ----------- S t a t e ------------- |
1442 // -- x0 : argument count (preserved for callee) | 1442 // -- x0 : argument count (preserved for callee) |
1443 // -- x1 : new target (preserved for callee) | 1443 // -- x1 : new target (preserved for callee) |
1444 // -- x3 : target function (preserved for callee) | 1444 // -- x3 : target function (preserved for callee) |
1445 // ----------------------------------- | 1445 // ----------------------------------- |
1446 Label failed; | 1446 Label failed; |
1447 { | 1447 { |
1448 FrameScope scope(masm, StackFrame::INTERNAL); | 1448 FrameScope scope(masm, StackFrame::INTERNAL); |
| 1449 // Preserve argument count for later compare. |
| 1450 __ Move(x4, x0); |
1449 // Push a copy of the target function and the new target. | 1451 // Push a copy of the target function and the new target. |
1450 __ SmiTag(x0); | 1452 __ SmiTag(x0); |
1451 // Push another copy as a parameter to the runtime call. | 1453 // Push another copy as a parameter to the runtime call. |
1452 __ Push(x0, x1, x3, x1); | 1454 __ Push(x0, x1, x3, x1); |
1453 | 1455 |
1454 // Copy arguments from caller (stdlib, foreign, heap). | 1456 // Copy arguments from caller (stdlib, foreign, heap). |
1455 for (int i = 2; i >= 0; --i) { | 1457 Label args_done; |
1456 __ ldr(x4, MemOperand(fp, StandardFrameConstants::kCallerSPOffset + | 1458 __ cmp(x4, Operand(0)); |
1457 i * kPointerSize)); | 1459 __ B(eq, &args_done); |
1458 __ push(x4); | 1460 |
1459 } | 1461 Label args2; |
| 1462 __ cmp(x4, Operand(1)); |
| 1463 __ B(ne, &args2); |
| 1464 __ ldr(x5, MemOperand(fp, StandardFrameConstants::kCallerSPOffset + |
| 1465 0 * kPointerSize)); |
| 1466 __ push(x5); |
| 1467 __ jmp(&args_done); |
| 1468 |
| 1469 __ bind(&args2); |
| 1470 Label args3; |
| 1471 __ cmp(x4, Operand(2)); |
| 1472 __ B(ne, &args3); |
| 1473 __ ldr(x5, MemOperand(fp, StandardFrameConstants::kCallerSPOffset + |
| 1474 1 * kPointerSize)); |
| 1475 __ push(x5); |
| 1476 __ ldr(x5, MemOperand(fp, StandardFrameConstants::kCallerSPOffset + |
| 1477 0 * kPointerSize)); |
| 1478 __ push(x5); |
| 1479 __ jmp(&args_done); |
| 1480 |
| 1481 __ bind(&args3); |
| 1482 __ ldr(x5, MemOperand(fp, StandardFrameConstants::kCallerSPOffset + |
| 1483 2 * kPointerSize)); |
| 1484 __ push(x5); |
| 1485 __ ldr(x5, MemOperand(fp, StandardFrameConstants::kCallerSPOffset + |
| 1486 1 * kPointerSize)); |
| 1487 __ push(x5); |
| 1488 __ ldr(x5, MemOperand(fp, StandardFrameConstants::kCallerSPOffset + |
| 1489 0 * kPointerSize)); |
| 1490 __ push(x5); |
| 1491 __ bind(&args_done); |
| 1492 |
| 1493 // Increment and restore argument count to call runtime method |
| 1494 // with function as extra argument. |
| 1495 __ add(x4, x4, Operand(1)); |
| 1496 __ Move(x0, x4); |
1460 // Call runtime, on success unwind frame, and parent frame. | 1497 // Call runtime, on success unwind frame, and parent frame. |
1461 __ CallRuntime(Runtime::kInstantiateAsmJs, 4); | 1498 __ CallRuntime(Runtime::kInstantiateAsmJs, -1); |
1462 // A smi 0 is returned on failure, an object on success. | 1499 // A smi 0 is returned on failure, an object on success. |
1463 __ JumpIfSmi(x0, &failed); | 1500 __ JumpIfSmi(x0, &failed); |
| 1501 |
| 1502 __ pop(x4); |
| 1503 __ pop(x4); |
| 1504 __ pop(x4); |
| 1505 __ SmiUntag(x4); |
1464 scope.GenerateLeaveFrame(); | 1506 scope.GenerateLeaveFrame(); |
1465 __ Drop(4); | 1507 |
| 1508 __ pop(x5); |
| 1509 __ add(x4, x4, Operand(1)); |
| 1510 __ add(jssp, jssp, Operand(x4, LSL, kPointerSizeLog2)); |
| 1511 __ push(x5); |
1466 __ Ret(); | 1512 __ Ret(); |
1467 | 1513 |
1468 __ bind(&failed); | 1514 __ bind(&failed); |
1469 // Restore target function and new target. | 1515 // Restore target function and new target. |
1470 __ Pop(x3, x1, x0); | 1516 __ Pop(x3, x1, x0); |
1471 __ SmiUntag(x0); | 1517 __ SmiUntag(x0); |
1472 } | 1518 } |
1473 // On failure, tail call back to regular js. | 1519 // On failure, tail call back to regular js. |
1474 GenerateTailCallToReturnedCode(masm, Runtime::kCompileLazy); | 1520 GenerateTailCallToReturnedCode(masm, Runtime::kCompileBaseline); |
1475 } | 1521 } |
1476 | 1522 |
1477 static void GenerateMakeCodeYoungAgainCommon(MacroAssembler* masm) { | 1523 static void GenerateMakeCodeYoungAgainCommon(MacroAssembler* masm) { |
1478 // For now, we are relying on the fact that make_code_young doesn't do any | 1524 // For now, we are relying on the fact that make_code_young doesn't do any |
1479 // garbage collection which allows us to save/restore the registers without | 1525 // garbage collection which allows us to save/restore the registers without |
1480 // worrying about which of them contain pointers. We also don't build an | 1526 // worrying about which of them contain pointers. We also don't build an |
1481 // internal frame to make the code fast, since we shouldn't have to do stack | 1527 // internal frame to make the code fast, since we shouldn't have to do stack |
1482 // crawls in MakeCodeYoung. This seems a bit fragile. | 1528 // crawls in MakeCodeYoung. This seems a bit fragile. |
1483 | 1529 |
1484 // The following caller-saved registers must be saved and restored when | 1530 // The following caller-saved registers must be saved and restored when |
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3033 __ Unreachable(); | 3079 __ Unreachable(); |
3034 } | 3080 } |
3035 } | 3081 } |
3036 | 3082 |
3037 #undef __ | 3083 #undef __ |
3038 | 3084 |
3039 } // namespace internal | 3085 } // namespace internal |
3040 } // namespace v8 | 3086 } // namespace v8 |
3041 | 3087 |
3042 #endif // V8_TARGET_ARCH_ARM | 3088 #endif // V8_TARGET_ARCH_ARM |
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