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| 1 // Copyright 2015 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 (function(global, code_stubs) { |
| 6 |
| 7 "use strict"; |
| 8 |
| 9 code_stubs.StringLengthTFStub = function StringLengthTFStub(call_conv, minor_key
) { |
| 10 var stub = function(receiver, name, i, v) { |
| 11 // i and v are dummy parameters mandated by the InterfaceDescriptor, |
| 12 // (LoadWithVectorDescriptor). |
| 13 return %_StringGetLength(%_JSValueGetValue(receiver)); |
| 14 } |
| 15 return stub; |
| 16 } |
| 17 |
| 18 code_stubs.StringAddTFStub = function StringAddTFStub(call_conv, minor_key) { |
| 19 var stub = function(left, right) { |
| 20 return %StringAdd(left, right); |
| 21 } |
| 22 return stub; |
| 23 } |
| 24 |
| 25 const kTurboFanICCallModeMask = 1; |
| 26 const kTurboFanICCallForUnptimizedCode = 0; |
| 27 const kTurboFanICCallForOptimizedCode = 1; |
| 28 |
| 29 code_stubs.MathFloorStub = function MathFloorStub(call_conv, minor_key) { |
| 30 var call_from_optimized_ic = function(f, i, tv, receiver, v) { |
| 31 "use strict"; |
| 32 // |f| is this function's JSFunction |
| 33 // |i| is TypeFeedbackVector slot # of callee's CallIC for Math.floor call |
| 34 // |receiver| is receiver, should not be used |
| 35 // |tv| is the calling function's type vector |
| 36 // |v| is the value to floor |
| 37 if (f !== %_FixedArrayGet(tv, i|0)) { |
| 38 return %_CallFunction(receiver, v, f); |
| 39 } |
| 40 var r = %_MathFloor(+v); |
| 41 if (%_IsMinusZero(r)) { |
| 42 // Collect type feedback when the result of the floor is -0. This is |
| 43 // accomplished by storing a sentinel in the second, "extra" |
| 44 // TypeFeedbackVector slot corresponding to the Math.floor CallIC call in |
| 45 // the caller's TypeVector. |
| 46 %_FixedArraySet(tv, ((i|0)+1)|0, 1); |
| 47 return -0; |
| 48 } |
| 49 // Return integers in smi range as smis. |
| 50 var trunc = r|0; |
| 51 if (trunc === r) { |
| 52 return trunc; |
| 53 } |
| 54 return r; |
| 55 } |
| 56 var call_mode = (minor_key & kTurboFanICCallModeMask); |
| 57 if (call_mode == kTurboFanICCallForOptimizedCode) { |
| 58 return call_from_optimized_ic; |
| 59 } else { |
| 60 %SetForceInlineFlag(call_from_optimized_ic); |
| 61 var call_from_unoptimized_ic = function(f, i, receiver, v) { |
| 62 var tv = %_GetTypeFeedbackVector(%_GetCallerJSFunction()); |
| 63 return call_from_optimized_ic(f, i, tv, receiver, v); |
| 64 } |
| 65 return call_from_unoptimized_ic; |
| 66 } |
| 67 } |
| 68 |
| 69 }) |
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