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| 1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 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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| 35 | 35 |
| 36 namespace v8 { | 36 namespace v8 { |
| 37 namespace internal { | 37 namespace internal { |
| 38 | 38 |
| 39 #define __ ACCESS_MASM(masm) | 39 #define __ ACCESS_MASM(masm) |
| 40 | 40 |
| 41 #if defined(USE_SIMULATOR) | 41 #if defined(USE_SIMULATOR) |
| 42 byte* fast_exp_a64_machine_code = NULL; | 42 byte* fast_exp_a64_machine_code = NULL; |
| 43 double fast_exp_simulator(double x) { | 43 double fast_exp_simulator(double x) { |
| 44 Simulator * simulator = Simulator::current(Isolate::Current()); | 44 Simulator * simulator = Simulator::current(Isolate::Current()); |
| 45 return simulator->CallDouble(fast_exp_a64_machine_code, | 45 Simulator::CallArgument args[] = { |
| 46 Simulator::CallArgument(x), | 46 Simulator::CallArgument(x), |
| 47 Simulator::CallArgument::End()); | 47 Simulator::CallArgument::End() |
| 48 }; |
| 49 return simulator->CallDouble(fast_exp_a64_machine_code, args); |
| 48 } | 50 } |
| 49 #endif | 51 #endif |
| 50 | 52 |
| 51 | 53 |
| 52 UnaryMathFunction CreateExpFunction() { | 54 UnaryMathFunction CreateExpFunction() { |
| 53 if (!FLAG_fast_math) return &std::exp; | 55 if (!FLAG_fast_math) return &std::exp; |
| 54 | 56 |
| 55 // Use the Math.exp implemetation in MathExpGenerator::EmitMathExp() to create | 57 // Use the Math.exp implemetation in MathExpGenerator::EmitMathExp() to create |
| 56 // an AAPCS64-compliant exp() function. This will be faster than the C | 58 // an AAPCS64-compliant exp() function. This will be faster than the C |
| 57 // library's exp() function, but probably less accurate. | 59 // library's exp() function, but probably less accurate. |
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| 605 __ Fmul(result, double_temp3, double_temp1); | 607 __ Fmul(result, double_temp3, double_temp1); |
| 606 | 608 |
| 607 __ Bind(&done); | 609 __ Bind(&done); |
| 608 } | 610 } |
| 609 | 611 |
| 610 #undef __ | 612 #undef __ |
| 611 | 613 |
| 612 } } // namespace v8::internal | 614 } } // namespace v8::internal |
| 613 | 615 |
| 614 #endif // V8_TARGET_ARCH_A64 | 616 #endif // V8_TARGET_ARCH_A64 |
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