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Issue 8390032: MIPS: port Moved random generator state to global context. (Closed)
Patch Set: Created 9 years, 2 months ago
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1 // Copyright 2011 the V8 project authors. All rights reserved. 1 // Copyright 2011 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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2844 __ mov(s0, v0); // Save result in s0, so it is saved thru CFunc call. 2844 __ mov(s0, v0); // Save result in s0, so it is saved thru CFunc call.
2845 2845
2846 __ bind(&heapnumber_allocated); 2846 __ bind(&heapnumber_allocated);
2847 2847
2848 // Convert 32 random bits in v0 to 0.(32 random bits) in a double 2848 // Convert 32 random bits in v0 to 0.(32 random bits) in a double
2849 // by computing: 2849 // by computing:
2850 // ( 1.(20 0s)(32 random bits) x 2^20 ) - (1.0 x 2^20)). 2850 // ( 1.(20 0s)(32 random bits) x 2^20 ) - (1.0 x 2^20)).
2851 if (CpuFeatures::IsSupported(FPU)) { 2851 if (CpuFeatures::IsSupported(FPU)) {
2852 __ PrepareCallCFunction(1, a0); 2852 __ PrepareCallCFunction(1, a0);
2853 __ lw(a0, ContextOperand(cp, Context::GLOBAL_INDEX)); 2853 __ lw(a0, ContextOperand(cp, Context::GLOBAL_INDEX));
2854 __ lw(a0, FieldOperand(a0, GlobalObject::kGlobalContextOffset)); 2854 __ lw(a0, FieldMemOperand(a0, GlobalObject::kGlobalContextOffset));
2855 __ CallCFunction(ExternalReference::random_uint32_function(isolate()), 1); 2855 __ CallCFunction(ExternalReference::random_uint32_function(isolate()), 1);
2856 2856
2857 2857
2858 CpuFeatures::Scope scope(FPU); 2858 CpuFeatures::Scope scope(FPU);
2859 // 0x41300000 is the top half of 1.0 x 2^20 as a double. 2859 // 0x41300000 is the top half of 1.0 x 2^20 as a double.
2860 __ li(a1, Operand(0x41300000)); 2860 __ li(a1, Operand(0x41300000));
2861 // Move 0x41300000xxxxxxxx (x = random bits in v0) to FPU. 2861 // Move 0x41300000xxxxxxxx (x = random bits in v0) to FPU.
2862 __ Move(f12, v0, a1); 2862 __ Move(f12, v0, a1);
2863 // Move 0x4130000000000000 to FPU. 2863 // Move 0x4130000000000000 to FPU.
2864 __ Move(f14, zero_reg, a1); 2864 __ Move(f14, zero_reg, a1);
2865 // Subtract and store the result in the heap number. 2865 // Subtract and store the result in the heap number.
2866 __ sub_d(f0, f12, f14); 2866 __ sub_d(f0, f12, f14);
2867 __ sdc1(f0, MemOperand(s0, HeapNumber::kValueOffset - kHeapObjectTag)); 2867 __ sdc1(f0, MemOperand(s0, HeapNumber::kValueOffset - kHeapObjectTag));
2868 __ mov(v0, s0); 2868 __ mov(v0, s0);
2869 } else { 2869 } else {
2870 __ PrepareCallCFunction(2, a0); 2870 __ PrepareCallCFunction(2, a0);
2871 __ mov(a0, s0); 2871 __ mov(a0, s0);
2872 __ lw(a1, ContextOperand(cp, Context::GLOBAL_INDEX)); 2872 __ lw(a1, ContextOperand(cp, Context::GLOBAL_INDEX));
2873 __ lw(a1, FieldOperand(a1, GlobalObject::kGlobalContextOffset)); 2873 __ lw(a1, FieldMemOperand(a1, GlobalObject::kGlobalContextOffset));
2874 __ CallCFunction( 2874 __ CallCFunction(
2875 ExternalReference::fill_heap_number_with_random_function(isolate()), 2); 2875 ExternalReference::fill_heap_number_with_random_function(isolate()), 2);
2876 } 2876 }
2877 2877
2878 context()->Plug(v0); 2878 context()->Plug(v0);
2879 } 2879 }
2880 2880
2881 2881
2882 void FullCodeGenerator::EmitSubString(ZoneList<Expression*>* args) { 2882 void FullCodeGenerator::EmitSubString(ZoneList<Expression*>* args) {
2883 // Load the arguments on the stack and call the stub. 2883 // Load the arguments on the stack and call the stub.
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4336 *context_length = 0; 4336 *context_length = 0;
4337 return previous_; 4337 return previous_;
4338 } 4338 }
4339 4339
4340 4340
4341 #undef __ 4341 #undef __
4342 4342
4343 } } // namespace v8::internal 4343 } } // namespace v8::internal
4344 4344
4345 #endif // V8_TARGET_ARCH_MIPS 4345 #endif // V8_TARGET_ARCH_MIPS
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