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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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2019 | 2019 |
2020 // catch (e) { receiver = iter; f = 'throw'; arg = e; goto l_call; } | 2020 // catch (e) { receiver = iter; f = 'throw'; arg = e; goto l_call; } |
2021 __ bind(&l_catch); | 2021 __ bind(&l_catch); |
2022 handler_table()->set(expr->index(), Smi::FromInt(l_catch.pos())); | 2022 handler_table()->set(expr->index(), Smi::FromInt(l_catch.pos())); |
2023 __ LoadRoot(rcx, Heap::kthrow_stringRootIndex); // "throw" | 2023 __ LoadRoot(rcx, Heap::kthrow_stringRootIndex); // "throw" |
2024 __ push(rcx); | 2024 __ push(rcx); |
2025 __ push(Operand(rsp, 2 * kPointerSize)); // iter | 2025 __ push(Operand(rsp, 2 * kPointerSize)); // iter |
2026 __ push(rax); // exception | 2026 __ push(rax); // exception |
2027 __ jmp(&l_call); | 2027 __ jmp(&l_call); |
2028 | 2028 |
2029 // try { received = yield result.value } | 2029 // try { received = %yield result } |
| 2030 // Shuffle the received result above a try handler and yield it without |
| 2031 // re-boxing. |
2030 __ bind(&l_try); | 2032 __ bind(&l_try); |
2031 EmitCreateIteratorResult(false); // pop and box to rax | 2033 __ pop(rax); // result |
2032 __ PushTryHandler(StackHandler::CATCH, expr->index()); | 2034 __ PushTryHandler(StackHandler::CATCH, expr->index()); |
2033 const int handler_size = StackHandlerConstants::kSize; | 2035 const int handler_size = StackHandlerConstants::kSize; |
2034 __ push(rax); // result | 2036 __ push(rax); // result |
2035 __ push(Operand(rsp, (0 + 1) * kPointerSize + handler_size)); // g | 2037 __ push(Operand(rsp, (0 + 1) * kPointerSize + handler_size)); // g |
2036 __ CallRuntime(Runtime::kSuspendJSGeneratorObject, 1); | 2038 __ CallRuntime(Runtime::kSuspendJSGeneratorObject, 1); |
2037 __ movq(context_register(), | 2039 __ movq(context_register(), |
2038 Operand(rbp, StandardFrameConstants::kContextOffset)); | 2040 Operand(rbp, StandardFrameConstants::kContextOffset)); |
2039 __ CompareRoot(rax, Heap::kTheHoleValueRootIndex); | 2041 __ CompareRoot(rax, Heap::kTheHoleValueRootIndex); |
2040 __ j(not_equal, &l_resume); | 2042 __ j(not_equal, &l_resume); |
2041 __ pop(rax); // result | 2043 __ pop(rax); // result |
2042 EmitReturnSequence(); | 2044 EmitReturnSequence(); |
2043 __ bind(&l_resume); // received in rax | 2045 __ bind(&l_resume); // received in rax |
2044 __ PopTryHandler(); | 2046 __ PopTryHandler(); |
2045 | 2047 |
2046 // receiver = iter; f = 'next'; arg = received; | 2048 // receiver = iter; f = 'next'; arg = received; |
2047 __ bind(&l_next); | 2049 __ bind(&l_next); |
2048 __ LoadRoot(rcx, Heap::knext_stringRootIndex); // "next" | 2050 __ LoadRoot(rcx, Heap::knext_stringRootIndex); // "next" |
2049 __ push(rcx); | 2051 __ push(rcx); |
2050 __ push(Operand(rsp, 2 * kPointerSize)); // iter | 2052 __ push(Operand(rsp, 2 * kPointerSize)); // iter |
2051 __ push(rax); // received | 2053 __ push(rax); // received |
2052 | 2054 |
2053 // result = receiver[f](arg); | 2055 // result = receiver[f](arg); |
2054 __ bind(&l_call); | 2056 __ bind(&l_call); |
2055 Handle<Code> ic = isolate()->stub_cache()->ComputeKeyedCallInitialize(1); | 2057 Handle<Code> ic = isolate()->stub_cache()->ComputeKeyedCallInitialize(1); |
2056 CallIC(ic); | 2058 CallIC(ic); |
2057 __ movq(rsi, Operand(rbp, StandardFrameConstants::kContextOffset)); | 2059 __ movq(rsi, Operand(rbp, StandardFrameConstants::kContextOffset)); |
2058 __ Drop(1); // The key is still on the stack; drop it. | 2060 __ Drop(1); // The key is still on the stack; drop it. |
2059 | 2061 |
2060 // val = result.value; if (!result.done) goto l_try; | 2062 // if (!result.done) goto l_try; |
2061 __ bind(&l_loop); | 2063 __ bind(&l_loop); |
2062 // result.value | |
2063 __ push(rax); // save result | 2064 __ push(rax); // save result |
2064 __ LoadRoot(rcx, Heap::kvalue_stringRootIndex); // "value" | |
2065 Handle<Code> value_ic = isolate()->builtins()->LoadIC_Initialize(); | |
2066 CallIC(value_ic); // result.value in rax | |
2067 __ pop(rbx); // result | |
2068 __ push(rax); // result.value | |
2069 __ movq(rax, rbx); // result | |
2070 __ LoadRoot(rcx, Heap::kdone_stringRootIndex); // "done" | 2065 __ LoadRoot(rcx, Heap::kdone_stringRootIndex); // "done" |
2071 Handle<Code> done_ic = isolate()->builtins()->LoadIC_Initialize(); | 2066 Handle<Code> done_ic = isolate()->builtins()->LoadIC_Initialize(); |
2072 CallIC(done_ic); // result.done in rax | 2067 CallIC(done_ic); // result.done in rax |
2073 Handle<Code> bool_ic = ToBooleanStub::GetUninitialized(isolate()); | 2068 Handle<Code> bool_ic = ToBooleanStub::GetUninitialized(isolate()); |
2074 CallIC(bool_ic); | 2069 CallIC(bool_ic); |
2075 __ testq(result_register(), result_register()); | 2070 __ testq(result_register(), result_register()); |
2076 __ j(zero, &l_try); | 2071 __ j(zero, &l_try); |
2077 | 2072 |
2078 // result.value | 2073 // result.value |
2079 __ pop(rax); // result.value | 2074 __ pop(rax); // result |
| 2075 __ LoadRoot(rcx, Heap::kvalue_stringRootIndex); // "value" |
| 2076 Handle<Code> value_ic = isolate()->builtins()->LoadIC_Initialize(); |
| 2077 CallIC(value_ic); // result.value in rax |
2080 context()->DropAndPlug(2, rax); // drop iter and g | 2078 context()->DropAndPlug(2, rax); // drop iter and g |
2081 break; | 2079 break; |
2082 } | 2080 } |
2083 } | 2081 } |
2084 } | 2082 } |
2085 | 2083 |
2086 | 2084 |
2087 void FullCodeGenerator::EmitGeneratorResume(Expression *generator, | 2085 void FullCodeGenerator::EmitGeneratorResume(Expression *generator, |
2088 Expression *value, | 2086 Expression *value, |
2089 JSGeneratorObject::ResumeMode resume_mode) { | 2087 JSGeneratorObject::ResumeMode resume_mode) { |
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4883 *context_length = 0; | 4881 *context_length = 0; |
4884 return previous_; | 4882 return previous_; |
4885 } | 4883 } |
4886 | 4884 |
4887 | 4885 |
4888 #undef __ | 4886 #undef __ |
4889 | 4887 |
4890 } } // namespace v8::internal | 4888 } } // namespace v8::internal |
4891 | 4889 |
4892 #endif // V8_TARGET_ARCH_X64 | 4890 #endif // V8_TARGET_ARCH_X64 |
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