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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 // 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_ARM | 5 #if V8_TARGET_ARCH_ARM |
6 | 6 |
7 #include "src/codegen.h" | 7 #include "src/codegen.h" |
8 #include "src/debug/debug.h" | 8 #include "src/debug/debug.h" |
9 #include "src/deoptimizer.h" | 9 #include "src/deoptimizer.h" |
10 #include "src/full-codegen/full-codegen.h" | 10 #include "src/full-codegen/full-codegen.h" |
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1442 | 1442 |
1443 void Builtins::Generate_InstantiateAsmJs(MacroAssembler* masm) { | 1443 void Builtins::Generate_InstantiateAsmJs(MacroAssembler* masm) { |
1444 // ----------- S t a t e ------------- | 1444 // ----------- S t a t e ------------- |
1445 // -- r0 : argument count (preserved for callee) | 1445 // -- r0 : argument count (preserved for callee) |
1446 // -- r1 : new target (preserved for callee) | 1446 // -- r1 : new target (preserved for callee) |
1447 // -- r3 : target function (preserved for callee) | 1447 // -- r3 : target function (preserved for callee) |
1448 // ----------------------------------- | 1448 // ----------------------------------- |
1449 Label failed; | 1449 Label failed; |
1450 { | 1450 { |
1451 FrameScope scope(masm, StackFrame::INTERNAL); | 1451 FrameScope scope(masm, StackFrame::INTERNAL); |
| 1452 // Preserve argument count for later compare. |
| 1453 __ Move(r4, r0); |
1452 // Push the number of arguments to the callee. | 1454 // Push the number of arguments to the callee. |
1453 __ SmiTag(r0); | 1455 __ SmiTag(r0); |
1454 __ push(r0); | 1456 __ push(r0); |
1455 // Push a copy of the target function and the new target. | 1457 // Push a copy of the target function and the new target. |
1456 __ push(r1); | 1458 __ push(r1); |
1457 __ push(r3); | 1459 __ push(r3); |
1458 | 1460 |
1459 // The function. | 1461 // The function. |
1460 __ push(r1); | 1462 __ push(r1); |
1461 // Copy arguments from caller (stdlib, foreign, heap). | 1463 // Copy arguments from caller (stdlib, foreign, heap). |
1462 for (int i = 2; i >= 0; --i) { | 1464 Label args_done; |
1463 __ ldr(r4, MemOperand(fp, StandardFrameConstants::kCallerSPOffset + | 1465 __ cmp(r4, Operand(0)); |
1464 i * kPointerSize)); | 1466 __ b(eq, &args_done); |
1465 __ push(r4); | 1467 |
1466 } | 1468 Label args2; |
| 1469 __ cmp(r4, Operand(1)); |
| 1470 __ b(ne, &args2); |
| 1471 __ ldr(r5, MemOperand(fp, StandardFrameConstants::kCallerSPOffset + |
| 1472 0 * kPointerSize)); |
| 1473 __ push(r5); |
| 1474 __ jmp(&args_done); |
| 1475 |
| 1476 __ bind(&args2); |
| 1477 Label args3; |
| 1478 __ cmp(r4, Operand(2)); |
| 1479 __ b(ne, &args3); |
| 1480 __ ldr(r5, MemOperand(fp, StandardFrameConstants::kCallerSPOffset + |
| 1481 1 * kPointerSize)); |
| 1482 __ push(r5); |
| 1483 __ ldr(r5, MemOperand(fp, StandardFrameConstants::kCallerSPOffset + |
| 1484 0 * kPointerSize)); |
| 1485 __ push(r5); |
| 1486 __ jmp(&args_done); |
| 1487 |
| 1488 __ bind(&args3); |
| 1489 __ ldr(r5, MemOperand(fp, StandardFrameConstants::kCallerSPOffset + |
| 1490 2 * kPointerSize)); |
| 1491 __ push(r5); |
| 1492 __ ldr(r5, MemOperand(fp, StandardFrameConstants::kCallerSPOffset + |
| 1493 1 * kPointerSize)); |
| 1494 __ push(r5); |
| 1495 __ ldr(r5, MemOperand(fp, StandardFrameConstants::kCallerSPOffset + |
| 1496 0 * kPointerSize)); |
| 1497 __ push(r5); |
| 1498 __ bind(&args_done); |
| 1499 |
| 1500 // Increment and restore argument count to call runtime method |
| 1501 // with function as extra argument. |
| 1502 __ add(r4, r4, Operand(1)); |
| 1503 __ Move(r0, r4); |
1467 // Call runtime, on success unwind frame, and parent frame. | 1504 // Call runtime, on success unwind frame, and parent frame. |
1468 __ CallRuntime(Runtime::kInstantiateAsmJs, 4); | 1505 __ CallRuntime(Runtime::kInstantiateAsmJs, -1); |
1469 // A smi 0 is returned on failure, an object on success. | 1506 // A smi 0 is returned on failure, an object on success. |
1470 __ JumpIfSmi(r0, &failed); | 1507 __ JumpIfSmi(r0, &failed); |
| 1508 |
| 1509 __ pop(r4); |
| 1510 __ pop(r4); |
| 1511 __ pop(r4); |
| 1512 __ SmiUntag(r4); |
1471 scope.GenerateLeaveFrame(); | 1513 scope.GenerateLeaveFrame(); |
1472 __ Drop(4); | 1514 |
| 1515 __ pop(r5); |
| 1516 __ add(r4, r4, Operand(1)); |
| 1517 __ add(sp, sp, Operand(r4, LSL, kPointerSizeLog2)); |
| 1518 __ push(r5); |
1473 __ Ret(); | 1519 __ Ret(); |
1474 | 1520 |
1475 __ bind(&failed); | 1521 __ bind(&failed); |
1476 // Restore target function and new target. | 1522 // Restore target function and new target. |
1477 __ pop(r3); | 1523 __ pop(r3); |
1478 __ pop(r1); | 1524 __ pop(r1); |
1479 __ pop(r0); | 1525 __ pop(r0); |
1480 __ SmiUntag(r0); | 1526 __ SmiUntag(r0); |
1481 } | 1527 } |
1482 // On failure, tail call back to regular js. | 1528 // On failure, tail call back to regular js. |
1483 GenerateTailCallToReturnedCode(masm, Runtime::kCompileLazy); | 1529 GenerateTailCallToReturnedCode(masm, Runtime::kCompileBaseline); |
1484 } | 1530 } |
1485 | 1531 |
1486 static void GenerateMakeCodeYoungAgainCommon(MacroAssembler* masm) { | 1532 static void GenerateMakeCodeYoungAgainCommon(MacroAssembler* masm) { |
1487 // For now, we are relying on the fact that make_code_young doesn't do any | 1533 // For now, we are relying on the fact that make_code_young doesn't do any |
1488 // garbage collection which allows us to save/restore the registers without | 1534 // garbage collection which allows us to save/restore the registers without |
1489 // worrying about which of them contain pointers. We also don't build an | 1535 // worrying about which of them contain pointers. We also don't build an |
1490 // internal frame to make the code faster, since we shouldn't have to do stack | 1536 // internal frame to make the code faster, since we shouldn't have to do stack |
1491 // crawls in MakeCodeYoung. This seems a bit fragile. | 1537 // crawls in MakeCodeYoung. This seems a bit fragile. |
1492 | 1538 |
1493 // The following registers must be saved and restored when calling through to | 1539 // The following registers must be saved and restored when calling through to |
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2919 __ bkpt(0); | 2965 __ bkpt(0); |
2920 } | 2966 } |
2921 } | 2967 } |
2922 | 2968 |
2923 #undef __ | 2969 #undef __ |
2924 | 2970 |
2925 } // namespace internal | 2971 } // namespace internal |
2926 } // namespace v8 | 2972 } // namespace v8 |
2927 | 2973 |
2928 #endif // V8_TARGET_ARCH_ARM | 2974 #endif // V8_TARGET_ARCH_ARM |
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