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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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| 2029 break; | 2029 break; |
| 2030 } | 2030 } |
| 2031 | 2031 |
| 2032 case Yield::DELEGATING: { | 2032 case Yield::DELEGATING: { |
| 2033 VisitForStackValue(expr->generator_object()); | 2033 VisitForStackValue(expr->generator_object()); |
| 2034 | 2034 |
| 2035 // Initial stack layout is as follows: | 2035 // Initial stack layout is as follows: |
| 2036 // [sp + 1 * kPointerSize] iter | 2036 // [sp + 1 * kPointerSize] iter |
| 2037 // [sp + 0 * kPointerSize] g | 2037 // [sp + 0 * kPointerSize] g |
| 2038 | 2038 |
| 2039 Label l_catch, l_try, l_resume, l_send, l_call, l_loop; | 2039 Label l_catch, l_try, l_resume, l_next, l_call, l_loop; |
| 2040 // Initial send value is undefined. | 2040 // Initial send value is undefined. |
| 2041 __ LoadRoot(a0, Heap::kUndefinedValueRootIndex); | 2041 __ LoadRoot(a0, Heap::kUndefinedValueRootIndex); |
| 2042 __ Branch(&l_send); | 2042 __ Branch(&l_next); |
| 2043 | 2043 |
| 2044 // catch (e) { receiver = iter; f = iter.throw; arg = e; goto l_call; } | 2044 // catch (e) { receiver = iter; f = iter.throw; arg = e; goto l_call; } |
| 2045 __ bind(&l_catch); | 2045 __ bind(&l_catch); |
| 2046 __ mov(a0, v0); | 2046 __ mov(a0, v0); |
| 2047 handler_table()->set(expr->index(), Smi::FromInt(l_catch.pos())); | 2047 handler_table()->set(expr->index(), Smi::FromInt(l_catch.pos())); |
| 2048 __ lw(a3, MemOperand(sp, 1 * kPointerSize)); // iter | 2048 __ lw(a3, MemOperand(sp, 1 * kPointerSize)); // iter |
| 2049 __ push(a3); // iter | 2049 __ push(a3); // iter |
| 2050 __ push(a0); // exception | 2050 __ push(a0); // exception |
| 2051 __ mov(a0, a3); // iter | 2051 __ mov(a0, a3); // iter |
| 2052 __ LoadRoot(a2, Heap::kthrow_stringRootIndex); // "throw" | 2052 __ LoadRoot(a2, Heap::kthrow_stringRootIndex); // "throw" |
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| 2067 __ mov(a0, v0); | 2067 __ mov(a0, v0); |
| 2068 __ lw(context_register(), | 2068 __ lw(context_register(), |
| 2069 MemOperand(fp, StandardFrameConstants::kContextOffset)); | 2069 MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| 2070 __ LoadRoot(at, Heap::kTheHoleValueRootIndex); | 2070 __ LoadRoot(at, Heap::kTheHoleValueRootIndex); |
| 2071 __ Branch(&l_resume, ne, a0, Operand(at)); | 2071 __ Branch(&l_resume, ne, a0, Operand(at)); |
| 2072 EmitReturnIteratorResult(false); | 2072 EmitReturnIteratorResult(false); |
| 2073 __ mov(a0, v0); | 2073 __ mov(a0, v0); |
| 2074 __ bind(&l_resume); // received in a0 | 2074 __ bind(&l_resume); // received in a0 |
| 2075 __ PopTryHandler(); | 2075 __ PopTryHandler(); |
| 2076 | 2076 |
| 2077 // receiver = iter; f = iter.send; arg = received; | 2077 // receiver = iter; f = iter.next; arg = received; |
| 2078 __ bind(&l_send); | 2078 __ bind(&l_next); |
| 2079 __ lw(a3, MemOperand(sp, 1 * kPointerSize)); // iter | 2079 __ lw(a3, MemOperand(sp, 1 * kPointerSize)); // iter |
| 2080 __ push(a3); // iter | 2080 __ push(a3); // iter |
| 2081 __ push(a0); // received | 2081 __ push(a0); // received |
| 2082 __ mov(a0, a3); // iter | 2082 __ mov(a0, a3); // iter |
| 2083 __ LoadRoot(a2, Heap::ksend_stringRootIndex); // "send" | 2083 __ LoadRoot(a2, Heap::knext_stringRootIndex); // "next" |
| 2084 Handle<Code> send_ic = isolate()->builtins()->LoadIC_Initialize(); | 2084 Handle<Code> next_ic = isolate()->builtins()->LoadIC_Initialize(); |
| 2085 CallIC(send_ic); // iter.send in a0 | 2085 CallIC(next_ic); // iter.next in a0 |
| 2086 __ mov(a0, v0); | 2086 __ mov(a0, v0); |
| 2087 | 2087 |
| 2088 // result = f.call(receiver, arg); | 2088 // result = f.call(receiver, arg); |
| 2089 __ bind(&l_call); | 2089 __ bind(&l_call); |
| 2090 Label l_call_runtime; | 2090 Label l_call_runtime; |
| 2091 __ JumpIfSmi(a0, &l_call_runtime); | 2091 __ JumpIfSmi(a0, &l_call_runtime); |
| 2092 __ GetObjectType(a0, a1, a1); | 2092 __ GetObjectType(a0, a1, a1); |
| 2093 __ Branch(&l_call_runtime, ne, a1, Operand(JS_FUNCTION_TYPE)); | 2093 __ Branch(&l_call_runtime, ne, a1, Operand(JS_FUNCTION_TYPE)); |
| 2094 __ mov(a1, a0); | 2094 __ mov(a1, a0); |
| 2095 ParameterCount count(1); | 2095 ParameterCount count(1); |
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| 2180 __ push(cp); // Callee's context. | 2180 __ push(cp); // Callee's context. |
| 2181 __ push(t0); // Callee's JS Function. | 2181 __ push(t0); // Callee's JS Function. |
| 2182 | 2182 |
| 2183 // Load the operand stack size. | 2183 // Load the operand stack size. |
| 2184 __ lw(a3, FieldMemOperand(a1, JSGeneratorObject::kOperandStackOffset)); | 2184 __ lw(a3, FieldMemOperand(a1, JSGeneratorObject::kOperandStackOffset)); |
| 2185 __ lw(a3, FieldMemOperand(a3, FixedArray::kLengthOffset)); | 2185 __ lw(a3, FieldMemOperand(a3, FixedArray::kLengthOffset)); |
| 2186 __ SmiUntag(a3); | 2186 __ SmiUntag(a3); |
| 2187 | 2187 |
| 2188 // If we are sending a value and there is no operand stack, we can jump back | 2188 // If we are sending a value and there is no operand stack, we can jump back |
| 2189 // in directly. | 2189 // in directly. |
| 2190 if (resume_mode == JSGeneratorObject::SEND) { | 2190 if (resume_mode == JSGeneratorObject::NEXT) { |
| 2191 Label slow_resume; | 2191 Label slow_resume; |
| 2192 __ Branch(&slow_resume, ne, a3, Operand(zero_reg)); | 2192 __ Branch(&slow_resume, ne, a3, Operand(zero_reg)); |
| 2193 __ lw(a3, FieldMemOperand(t0, JSFunction::kCodeEntryOffset)); | 2193 __ lw(a3, FieldMemOperand(t0, JSFunction::kCodeEntryOffset)); |
| 2194 __ lw(a2, FieldMemOperand(a1, JSGeneratorObject::kContinuationOffset)); | 2194 __ lw(a2, FieldMemOperand(a1, JSGeneratorObject::kContinuationOffset)); |
| 2195 __ SmiUntag(a2); | 2195 __ SmiUntag(a2); |
| 2196 __ Addu(a3, a3, Operand(a2)); | 2196 __ Addu(a3, a3, Operand(a2)); |
| 2197 __ li(a2, Operand(Smi::FromInt(JSGeneratorObject::kGeneratorExecuting))); | 2197 __ li(a2, Operand(Smi::FromInt(JSGeneratorObject::kGeneratorExecuting))); |
| 2198 __ sw(a2, FieldMemOperand(a1, JSGeneratorObject::kContinuationOffset)); | 2198 __ sw(a2, FieldMemOperand(a1, JSGeneratorObject::kContinuationOffset)); |
| 2199 __ Jump(a3); | 2199 __ Jump(a3); |
| 2200 __ bind(&slow_resume); | 2200 __ bind(&slow_resume); |
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| 4966 *context_length = 0; | 4966 *context_length = 0; |
| 4967 return previous_; | 4967 return previous_; |
| 4968 } | 4968 } |
| 4969 | 4969 |
| 4970 | 4970 |
| 4971 #undef __ | 4971 #undef __ |
| 4972 | 4972 |
| 4973 } } // namespace v8::internal | 4973 } } // namespace v8::internal |
| 4974 | 4974 |
| 4975 #endif // V8_TARGET_ARCH_MIPS | 4975 #endif // V8_TARGET_ARCH_MIPS |
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