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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 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 (function(global, utils) { | 5 (function(global, utils) { |
| 6 "use strict"; | 6 "use strict"; |
| 7 | 7 |
| 8 %CheckIsBootstrapping(); | 8 %CheckIsBootstrapping(); |
| 9 | 9 |
| 10 // ------------------------------------------------------------------- | 10 // ------------------------------------------------------------------- |
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| 40 randomNumbers = %GenerateRandomNumbers(randomNumbers); | 40 randomNumbers = %GenerateRandomNumbers(randomNumbers); |
| 41 if (%_IsTypedArray(randomNumbers)) { | 41 if (%_IsTypedArray(randomNumbers)) { |
| 42 nextRandomIndex = %_TypedArrayGetLength(randomNumbers); | 42 nextRandomIndex = %_TypedArrayGetLength(randomNumbers); |
| 43 } else { | 43 } else { |
| 44 nextRandomIndex = randomNumbers.length; | 44 nextRandomIndex = randomNumbers.length; |
| 45 } | 45 } |
| 46 } | 46 } |
| 47 return randomNumbers[--nextRandomIndex]; | 47 return randomNumbers[--nextRandomIndex]; |
| 48 } | 48 } |
| 49 | 49 |
| 50 function MathRandomRaw() { | |
| 51 if (nextRandomIndex <= kRandomNumberStart) { | |
| 52 randomNumbers = %GenerateRandomNumbers(randomNumbers); | |
| 53 nextRandomIndex = %_TypedArrayGetLength(randomNumbers); | |
| 54 } | |
| 55 return %_DoubleLo(randomNumbers[--nextRandomIndex]) & 0x3FFFFFFF; | |
| 56 } | |
| 57 | |
| 58 // ES6 draft 09-27-13, section 20.2.2.28. | 50 // ES6 draft 09-27-13, section 20.2.2.28. |
| 59 function MathSign(x) { | 51 function MathSign(x) { |
| 60 x = +x; | 52 x = +x; |
| 61 if (x > 0) return 1; | 53 if (x > 0) return 1; |
| 62 if (x < 0) return -1; | 54 if (x < 0) return -1; |
| 63 // -0, 0 or NaN. | 55 // -0, 0 or NaN. |
| 64 return x; | 56 return x; |
| 65 } | 57 } |
| 66 | 58 |
| 67 // ES6 draft 09-27-13, section 20.2.2.5. | 59 // ES6 draft 09-27-13, section 20.2.2.5. |
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| 135 ]); | 127 ]); |
| 136 | 128 |
| 137 %SetForceInlineFlag(MathRandom); | 129 %SetForceInlineFlag(MathRandom); |
| 138 %SetForceInlineFlag(MathSign); | 130 %SetForceInlineFlag(MathSign); |
| 139 | 131 |
| 140 // ------------------------------------------------------------------- | 132 // ------------------------------------------------------------------- |
| 141 // Exports | 133 // Exports |
| 142 | 134 |
| 143 utils.Export(function(to) { | 135 utils.Export(function(to) { |
| 144 to.MathAbs = MathAbs; | 136 to.MathAbs = MathAbs; |
| 145 to.IntRandom = MathRandomRaw; | 137 to.MathRandom = MathRandom; |
| 146 }); | 138 }); |
| 147 | 139 |
| 148 }) | 140 }) |
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