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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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| 2781   __ Branch(if_false, eq, a3, Operand(t2)); | 2781   __ Branch(if_false, eq, a3, Operand(t2)); | 
| 2782   __ Addu(t0, t0, Operand(kPointerSize)); | 2782   __ Addu(t0, t0, Operand(kPointerSize)); | 
| 2783   __ bind(&entry); | 2783   __ bind(&entry); | 
| 2784   __ Branch(&loop, ne, t0, Operand(a2)); | 2784   __ Branch(&loop, ne, t0, Operand(a2)); | 
| 2785 | 2785 | 
| 2786   // If a valueOf property is not found on the object check that it's | 2786   // If a valueOf property is not found on the object check that it's | 
| 2787   // prototype is the un-modified String prototype. If not result is false. | 2787   // prototype is the un-modified String prototype. If not result is false. | 
| 2788   __ lw(a2, FieldMemOperand(a1, Map::kPrototypeOffset)); | 2788   __ lw(a2, FieldMemOperand(a1, Map::kPrototypeOffset)); | 
| 2789   __ JumpIfSmi(a2, if_false); | 2789   __ JumpIfSmi(a2, if_false); | 
| 2790   __ lw(a2, FieldMemOperand(a2, HeapObject::kMapOffset)); | 2790   __ lw(a2, FieldMemOperand(a2, HeapObject::kMapOffset)); | 
| 2791   __ lw(a3, ContextOperand(cp, Context::GLOBAL_INDEX)); | 2791   __ lw(a3, ContextOperand(cp, Context::GLOBAL_OBJECT_INDEX)); | 
| 2792   __ lw(a3, FieldMemOperand(a3, GlobalObject::kNativeContextOffset)); | 2792   __ lw(a3, FieldMemOperand(a3, GlobalObject::kNativeContextOffset)); | 
| 2793   __ lw(a3, ContextOperand(a3, Context::STRING_FUNCTION_PROTOTYPE_MAP_INDEX)); | 2793   __ lw(a3, ContextOperand(a3, Context::STRING_FUNCTION_PROTOTYPE_MAP_INDEX)); | 
| 2794   __ Branch(if_false, ne, a2, Operand(a3)); | 2794   __ Branch(if_false, ne, a2, Operand(a3)); | 
| 2795 | 2795 | 
| 2796   // Set the bit in the map to indicate that it has been checked safe for | 2796   // Set the bit in the map to indicate that it has been checked safe for | 
| 2797   // default valueOf and set true result. | 2797   // default valueOf and set true result. | 
| 2798   __ lbu(a2, FieldMemOperand(a1, Map::kBitField2Offset)); | 2798   __ lbu(a2, FieldMemOperand(a1, Map::kBitField2Offset)); | 
| 2799   __ Or(a2, a2, Operand(1 << Map::kStringWrapperSafeForDefaultValueOf)); | 2799   __ Or(a2, a2, Operand(1 << Map::kStringWrapperSafeForDefaultValueOf)); | 
| 2800   __ sb(a2, FieldMemOperand(a1, Map::kBitField2Offset)); | 2800   __ sb(a2, FieldMemOperand(a1, Map::kBitField2Offset)); | 
| 2801   __ jmp(if_true); | 2801   __ jmp(if_true); | 
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| 3062   __ CallRuntime(Runtime::kNumberAlloc, 0); | 3062   __ CallRuntime(Runtime::kNumberAlloc, 0); | 
| 3063   __ mov(s0, v0);   // Save result in s0, so it is saved thru CFunc call. | 3063   __ mov(s0, v0);   // Save result in s0, so it is saved thru CFunc call. | 
| 3064 | 3064 | 
| 3065   __ bind(&heapnumber_allocated); | 3065   __ bind(&heapnumber_allocated); | 
| 3066 | 3066 | 
| 3067   // Convert 32 random bits in v0 to 0.(32 random bits) in a double | 3067   // Convert 32 random bits in v0 to 0.(32 random bits) in a double | 
| 3068   // by computing: | 3068   // by computing: | 
| 3069   // ( 1.(20 0s)(32 random bits) x 2^20 ) - (1.0 x 2^20)). | 3069   // ( 1.(20 0s)(32 random bits) x 2^20 ) - (1.0 x 2^20)). | 
| 3070   if (CpuFeatures::IsSupported(FPU)) { | 3070   if (CpuFeatures::IsSupported(FPU)) { | 
| 3071     __ PrepareCallCFunction(1, a0); | 3071     __ PrepareCallCFunction(1, a0); | 
| 3072     __ lw(a0, ContextOperand(cp, Context::GLOBAL_INDEX)); | 3072     __ lw(a0, ContextOperand(cp, Context::GLOBAL_OBJECT_INDEX)); | 
| 3073     __ lw(a0, FieldMemOperand(a0, GlobalObject::kNativeContextOffset)); | 3073     __ lw(a0, FieldMemOperand(a0, GlobalObject::kNativeContextOffset)); | 
| 3074     __ CallCFunction(ExternalReference::random_uint32_function(isolate()), 1); | 3074     __ CallCFunction(ExternalReference::random_uint32_function(isolate()), 1); | 
| 3075 | 3075 | 
| 3076     CpuFeatures::Scope scope(FPU); | 3076     CpuFeatures::Scope scope(FPU); | 
| 3077     // 0x41300000 is the top half of 1.0 x 2^20 as a double. | 3077     // 0x41300000 is the top half of 1.0 x 2^20 as a double. | 
| 3078     __ li(a1, Operand(0x41300000)); | 3078     __ li(a1, Operand(0x41300000)); | 
| 3079     // Move 0x41300000xxxxxxxx (x = random bits in v0) to FPU. | 3079     // Move 0x41300000xxxxxxxx (x = random bits in v0) to FPU. | 
| 3080     __ Move(f12, v0, a1); | 3080     __ Move(f12, v0, a1); | 
| 3081     // Move 0x4130000000000000 to FPU. | 3081     // Move 0x4130000000000000 to FPU. | 
| 3082     __ Move(f14, zero_reg, a1); | 3082     __ Move(f14, zero_reg, a1); | 
| 3083     // Subtract and store the result in the heap number. | 3083     // Subtract and store the result in the heap number. | 
| 3084     __ sub_d(f0, f12, f14); | 3084     __ sub_d(f0, f12, f14); | 
| 3085     __ sdc1(f0, FieldMemOperand(s0, HeapNumber::kValueOffset)); | 3085     __ sdc1(f0, FieldMemOperand(s0, HeapNumber::kValueOffset)); | 
| 3086     __ mov(v0, s0); | 3086     __ mov(v0, s0); | 
| 3087   } else { | 3087   } else { | 
| 3088     __ PrepareCallCFunction(2, a0); | 3088     __ PrepareCallCFunction(2, a0); | 
| 3089     __ mov(a0, s0); | 3089     __ mov(a0, s0); | 
| 3090     __ lw(a1, ContextOperand(cp, Context::GLOBAL_INDEX)); | 3090     __ lw(a1, ContextOperand(cp, Context::GLOBAL_OBJECT_INDEX)); | 
| 3091     __ lw(a1, FieldMemOperand(a1, GlobalObject::kNativeContextOffset)); | 3091     __ lw(a1, FieldMemOperand(a1, GlobalObject::kNativeContextOffset)); | 
| 3092     __ CallCFunction( | 3092     __ CallCFunction( | 
| 3093         ExternalReference::fill_heap_number_with_random_function(isolate()), 2); | 3093         ExternalReference::fill_heap_number_with_random_function(isolate()), 2); | 
| 3094   } | 3094   } | 
| 3095 | 3095 | 
| 3096   context()->Plug(v0); | 3096   context()->Plug(v0); | 
| 3097 } | 3097 } | 
| 3098 | 3098 | 
| 3099 | 3099 | 
| 3100 void FullCodeGenerator::EmitSubString(CallRuntime* expr) { | 3100 void FullCodeGenerator::EmitSubString(CallRuntime* expr) { | 
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| 3508     __ Abort("Attempt to use undefined cache."); | 3508     __ Abort("Attempt to use undefined cache."); | 
| 3509     __ LoadRoot(v0, Heap::kUndefinedValueRootIndex); | 3509     __ LoadRoot(v0, Heap::kUndefinedValueRootIndex); | 
| 3510     context()->Plug(v0); | 3510     context()->Plug(v0); | 
| 3511     return; | 3511     return; | 
| 3512   } | 3512   } | 
| 3513 | 3513 | 
| 3514   VisitForAccumulatorValue(args->at(1)); | 3514   VisitForAccumulatorValue(args->at(1)); | 
| 3515 | 3515 | 
| 3516   Register key = v0; | 3516   Register key = v0; | 
| 3517   Register cache = a1; | 3517   Register cache = a1; | 
| 3518   __ lw(cache, ContextOperand(cp, Context::GLOBAL_INDEX)); | 3518   __ lw(cache, ContextOperand(cp, Context::GLOBAL_OBJECT_INDEX)); | 
| 3519   __ lw(cache, FieldMemOperand(cache, GlobalObject::kNativeContextOffset)); | 3519   __ lw(cache, FieldMemOperand(cache, GlobalObject::kNativeContextOffset)); | 
| 3520   __ lw(cache, | 3520   __ lw(cache, | 
| 3521          ContextOperand( | 3521          ContextOperand( | 
| 3522              cache, Context::JSFUNCTION_RESULT_CACHES_INDEX)); | 3522              cache, Context::JSFUNCTION_RESULT_CACHES_INDEX)); | 
| 3523   __ lw(cache, | 3523   __ lw(cache, | 
| 3524          FieldMemOperand(cache, FixedArray::OffsetOfElementAt(cache_id))); | 3524          FieldMemOperand(cache, FixedArray::OffsetOfElementAt(cache_id))); | 
| 3525 | 3525 | 
| 3526 | 3526 | 
| 3527   Label done, not_found; | 3527   Label done, not_found; | 
| 3528   STATIC_ASSERT(kSmiTag == 0 && kSmiTagSize == 1); | 3528   STATIC_ASSERT(kSmiTag == 0 && kSmiTagSize == 1); | 
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| 4611   *context_length = 0; | 4611   *context_length = 0; | 
| 4612   return previous_; | 4612   return previous_; | 
| 4613 } | 4613 } | 
| 4614 | 4614 | 
| 4615 | 4615 | 
| 4616 #undef __ | 4616 #undef __ | 
| 4617 | 4617 | 
| 4618 } }  // namespace v8::internal | 4618 } }  // namespace v8::internal | 
| 4619 | 4619 | 
| 4620 #endif  // V8_TARGET_ARCH_MIPS | 4620 #endif  // V8_TARGET_ARCH_MIPS | 
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