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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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7663 return isolate->heap()->AllocateHeapNumber(std::NAME(x)); \ | 7663 return isolate->heap()->AllocateHeapNumber(std::NAME(x)); \ |
7664 } | 7664 } |
7665 | 7665 |
7666 RUNTIME_UNARY_MATH(acos) | 7666 RUNTIME_UNARY_MATH(acos) |
7667 RUNTIME_UNARY_MATH(asin) | 7667 RUNTIME_UNARY_MATH(asin) |
7668 RUNTIME_UNARY_MATH(atan) | 7668 RUNTIME_UNARY_MATH(atan) |
7669 RUNTIME_UNARY_MATH(log) | 7669 RUNTIME_UNARY_MATH(log) |
7670 #undef RUNTIME_UNARY_MATH | 7670 #undef RUNTIME_UNARY_MATH |
7671 | 7671 |
7672 | 7672 |
7673 RUNTIME_FUNCTION(MaybeObject*, Runtime_DoubleHi) { | |
7674 SealHandleScope shs(isolate); | |
7675 ASSERT(args.length() == 1); | |
7676 CONVERT_DOUBLE_ARG_CHECKED(x, 0); | |
7677 return isolate->heap()->NumberFromDouble( | |
7678 static_cast<int32_t>(double_to_uint64(x) >> 32)); | |
7679 } | |
7680 | |
7681 | |
7682 RUNTIME_FUNCTION(MaybeObject*, Runtime_DoubleLo) { | |
7683 SealHandleScope shs(isolate); | |
7684 ASSERT(args.length() == 1); | |
7685 CONVERT_DOUBLE_ARG_CHECKED(x, 0); | |
7686 return isolate->heap()->NumberFromDouble( | |
7687 static_cast<int32_t>(double_to_uint64(x) & 0xffffffff)); | |
Sven Panne
2014/03/03 11:28:27
Add an unsigned suffix 'u' to the hexadecimal cons
| |
7688 } | |
7689 | |
7690 | |
7691 RUNTIME_FUNCTION(MaybeObject*, Runtime_ConstructDouble) { | |
7692 SealHandleScope shs(isolate); | |
7693 ASSERT(args.length() == 2); | |
7694 CONVERT_NUMBER_CHECKED(uint32_t, hi, Uint32, args[0]); | |
7695 CONVERT_NUMBER_CHECKED(uint32_t, lo, Uint32, args[1]); | |
7696 uint64_t result = (static_cast<uint64_t>(hi) << 32) | lo; | |
7697 return isolate->heap()->AllocateHeapNumber(uint64_to_double(result)); | |
7698 } | |
7699 | |
7700 | |
7673 // Cube root approximation, refer to: http://metamerist.com/cbrt/cbrt.htm | 7701 // Cube root approximation, refer to: http://metamerist.com/cbrt/cbrt.htm |
7674 // Using initial approximation adapted from Kahan's cbrt and 4 iterations | 7702 // Using initial approximation adapted from Kahan's cbrt and 4 iterations |
7675 // of Newton's method. | 7703 // of Newton's method. |
7676 inline double CubeRootNewtonIteration(double approx, double x) { | 7704 inline double CubeRootNewtonIteration(double approx, double x) { |
7677 return (1.0 / 3.0) * (x / (approx * approx) + 2 * approx); | 7705 return (1.0 / 3.0) * (x / (approx * approx) + 2 * approx); |
7678 } | 7706 } |
7679 | 7707 |
7680 | 7708 |
7681 inline double CubeRoot(double x) { | 7709 inline double CubeRoot(double x) { |
7682 static const uint64_t magic = V8_2PART_UINT64_C(0x2A9F7893, 00000000); | 7710 static const uint64_t magic = V8_2PART_UINT64_C(0x2A9F7893, 00000000); |
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14965 // Handle last resort GC and make sure to allow future allocations | 14993 // Handle last resort GC and make sure to allow future allocations |
14966 // to grow the heap without causing GCs (if possible). | 14994 // to grow the heap without causing GCs (if possible). |
14967 isolate->counters()->gc_last_resort_from_js()->Increment(); | 14995 isolate->counters()->gc_last_resort_from_js()->Increment(); |
14968 isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags, | 14996 isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags, |
14969 "Runtime::PerformGC"); | 14997 "Runtime::PerformGC"); |
14970 } | 14998 } |
14971 } | 14999 } |
14972 | 15000 |
14973 | 15001 |
14974 } } // namespace v8::internal | 15002 } } // namespace v8::internal |
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