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Issue 2899004: Add number allocation call to runtime.cc instead of misusing (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: Created 10 years, 5 months ago
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1 // Copyright 2009 the V8 project authors. All rights reserved. 1 // Copyright 2009 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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2154 ASSERT(args->length() == 0); 2154 ASSERT(args->length() == 0);
2155 2155
2156 Label slow_allocate_heapnumber; 2156 Label slow_allocate_heapnumber;
2157 Label heapnumber_allocated; 2157 Label heapnumber_allocated;
2158 2158
2159 __ LoadRoot(r6, Heap::kHeapNumberMapRootIndex); 2159 __ LoadRoot(r6, Heap::kHeapNumberMapRootIndex);
2160 __ AllocateHeapNumber(r4, r1, r2, r6, &slow_allocate_heapnumber); 2160 __ AllocateHeapNumber(r4, r1, r2, r6, &slow_allocate_heapnumber);
2161 __ jmp(&heapnumber_allocated); 2161 __ jmp(&heapnumber_allocated);
2162 2162
2163 __ bind(&slow_allocate_heapnumber); 2163 __ bind(&slow_allocate_heapnumber);
2164 // To allocate a heap number, and ensure that it is not a smi, we 2164 // Allocate a heap number.
2165 // call the runtime function FUnaryMinus on 0, returning the double 2165 __ CallRuntime(Runtime::kNumberAlloc, 0);
2166 // -0.0. A new, distinct heap number is returned each time.
2167 __ mov(r0, Operand(Smi::FromInt(0)));
2168 __ push(r0);
2169 __ CallRuntime(Runtime::kNumberUnaryMinus, 1);
2170 __ mov(r4, Operand(r0)); 2166 __ mov(r4, Operand(r0));
2171 2167
2172 __ bind(&heapnumber_allocated); 2168 __ bind(&heapnumber_allocated);
2173 2169
2174 // Convert 32 random bits in r0 to 0.(32 random bits) in a double 2170 // Convert 32 random bits in r0 to 0.(32 random bits) in a double
2175 // by computing: 2171 // by computing:
2176 // ( 1.(20 0s)(32 random bits) x 2^20 ) - (1.0 x 2^20)). 2172 // ( 1.(20 0s)(32 random bits) x 2^20 ) - (1.0 x 2^20)).
2177 if (CpuFeatures::IsSupported(VFP3)) { 2173 if (CpuFeatures::IsSupported(VFP3)) {
2178 __ PrepareCallCFunction(0, r1); 2174 __ PrepareCallCFunction(0, r1);
2179 __ CallCFunction(ExternalReference::random_uint32_function(), 0); 2175 __ CallCFunction(ExternalReference::random_uint32_function(), 0);
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3155 __ mov(r1, Operand(r1, ASR, 1)); // Un-smi-tag value. 3151 __ mov(r1, Operand(r1, ASR, 1)); // Un-smi-tag value.
3156 __ add(pc, r1, Operand(masm_->CodeObject())); 3152 __ add(pc, r1, Operand(masm_->CodeObject()));
3157 } 3153 }
3158 3154
3159 3155
3160 #undef __ 3156 #undef __
3161 3157
3162 } } // namespace v8::internal 3158 } } // namespace v8::internal
3163 3159
3164 #endif // V8_TARGET_ARCH_ARM 3160 #endif // V8_TARGET_ARCH_ARM
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