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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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3177 | 3177 |
3178 // If we came here, we need to see if we are the array function. | 3178 // If we came here, we need to see if we are the array function. |
3179 // If we didn't have a matching function, and we didn't find the megamorph | 3179 // If we didn't have a matching function, and we didn't find the megamorph |
3180 // sentinel, then we have in the slot either some other function or an | 3180 // sentinel, then we have in the slot either some other function or an |
3181 // AllocationSite. Do a map check on the object in a3. | 3181 // AllocationSite. Do a map check on the object in a3. |
3182 __ lw(t1, FieldMemOperand(t0, 0)); | 3182 __ lw(t1, FieldMemOperand(t0, 0)); |
3183 __ LoadRoot(at, Heap::kAllocationSiteMapRootIndex); | 3183 __ LoadRoot(at, Heap::kAllocationSiteMapRootIndex); |
3184 __ Branch(&miss, ne, t1, Operand(at)); | 3184 __ Branch(&miss, ne, t1, Operand(at)); |
3185 | 3185 |
3186 // Make sure the function is the Array() function | 3186 // Make sure the function is the Array() function |
3187 __ LoadArrayFunction(t0); | 3187 __ LoadGlobalFunction(Context::ARRAY_FUNCTION_INDEX, t0); |
3188 __ Branch(&megamorphic, ne, a1, Operand(t0)); | 3188 __ Branch(&megamorphic, ne, a1, Operand(t0)); |
3189 __ jmp(&done); | 3189 __ jmp(&done); |
3190 | 3190 |
3191 __ bind(&miss); | 3191 __ bind(&miss); |
3192 | 3192 |
3193 // A monomorphic miss (i.e, here the cache is not uninitialized) goes | 3193 // A monomorphic miss (i.e, here the cache is not uninitialized) goes |
3194 // megamorphic. | 3194 // megamorphic. |
3195 __ LoadRoot(at, Heap::kTheHoleValueRootIndex); | 3195 __ LoadRoot(at, Heap::kTheHoleValueRootIndex); |
3196 __ Branch(&initialize, eq, t0, Operand(at)); | 3196 __ Branch(&initialize, eq, t0, Operand(at)); |
3197 // MegamorphicSentinel is an immortal immovable object (undefined) so no | 3197 // MegamorphicSentinel is an immortal immovable object (undefined) so no |
3198 // write-barrier is needed. | 3198 // write-barrier is needed. |
3199 __ bind(&megamorphic); | 3199 __ bind(&megamorphic); |
3200 __ sll(t0, a3, kPointerSizeLog2 - kSmiTagSize); | 3200 __ sll(t0, a3, kPointerSizeLog2 - kSmiTagSize); |
3201 __ Addu(t0, a2, Operand(t0)); | 3201 __ Addu(t0, a2, Operand(t0)); |
3202 __ LoadRoot(at, Heap::kUndefinedValueRootIndex); | 3202 __ LoadRoot(at, Heap::kUndefinedValueRootIndex); |
3203 __ sw(at, FieldMemOperand(t0, FixedArray::kHeaderSize)); | 3203 __ sw(at, FieldMemOperand(t0, FixedArray::kHeaderSize)); |
3204 __ jmp(&done); | 3204 __ jmp(&done); |
3205 | 3205 |
3206 // An uninitialized cache is patched with the function or sentinel to | 3206 // An uninitialized cache is patched with the function or sentinel to |
3207 // indicate the ElementsKind if function is the Array constructor. | 3207 // indicate the ElementsKind if function is the Array constructor. |
3208 __ bind(&initialize); | 3208 __ bind(&initialize); |
3209 // Make sure the function is the Array() function | 3209 // Make sure the function is the Array() function |
3210 __ LoadArrayFunction(t0); | 3210 __ LoadGlobalFunction(Context::ARRAY_FUNCTION_INDEX, t0); |
3211 __ Branch(¬_array_function, ne, a1, Operand(t0)); | 3211 __ Branch(¬_array_function, ne, a1, Operand(t0)); |
3212 | 3212 |
3213 // The target function is the Array constructor. | 3213 // The target function is the Array constructor. |
3214 // Create an AllocationSite if we don't already have it, store it in the slot. | 3214 // Create an AllocationSite if we don't already have it, store it in the slot. |
3215 { | 3215 { |
3216 FrameScope scope(masm, StackFrame::INTERNAL); | 3216 FrameScope scope(masm, StackFrame::INTERNAL); |
3217 const RegList kSavedRegs = | 3217 const RegList kSavedRegs = |
3218 1 << 4 | // a0 | 3218 1 << 4 | // a0 |
3219 1 << 5 | // a1 | 3219 1 << 5 | // a1 |
3220 1 << 6 | // a2 | 3220 1 << 6 | // a2 |
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5760 MemOperand(fp, 6 * kPointerSize), | 5760 MemOperand(fp, 6 * kPointerSize), |
5761 NULL); | 5761 NULL); |
5762 } | 5762 } |
5763 | 5763 |
5764 | 5764 |
5765 #undef __ | 5765 #undef __ |
5766 | 5766 |
5767 } } // namespace v8::internal | 5767 } } // namespace v8::internal |
5768 | 5768 |
5769 #endif // V8_TARGET_ARCH_MIPS | 5769 #endif // V8_TARGET_ARCH_MIPS |
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