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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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| 1011           } | 1011           } | 
| 1012 | 1012 | 
| 1013           // Correct the sign of the result is the constant is negative. | 1013           // Correct the sign of the result is the constant is negative. | 
| 1014           if (constant < 0)  { | 1014           if (constant < 0)  { | 
| 1015             __ Subu(result, zero_reg, result); | 1015             __ Subu(result, zero_reg, result); | 
| 1016           } | 1016           } | 
| 1017 | 1017 | 
| 1018         } else { | 1018         } else { | 
| 1019           // Generate standard code. | 1019           // Generate standard code. | 
| 1020           __ li(at, constant); | 1020           __ li(at, constant); | 
| 1021           __ mul(result, left, at); | 1021           __ Mul(result, left, at); | 
| 1022         } | 1022         } | 
| 1023     } | 1023     } | 
| 1024 | 1024 | 
| 1025   } else { | 1025   } else { | 
| 1026     Register right = EmitLoadRegister(right_op, scratch); | 1026     Register right = EmitLoadRegister(right_op, scratch); | 
| 1027     if (bailout_on_minus_zero) { | 1027     if (bailout_on_minus_zero) { | 
| 1028       __ Or(ToRegister(instr->TempAt(0)), left, right); | 1028       __ Or(ToRegister(instr->TempAt(0)), left, right); | 
| 1029     } | 1029     } | 
| 1030 | 1030 | 
| 1031     if (can_overflow) { | 1031     if (can_overflow) { | 
| 1032       // hi:lo = left * right. | 1032       // hi:lo = left * right. | 
| 1033       __ mult(left, right); | 1033       __ mult(left, right); | 
| 1034       __ mfhi(scratch); | 1034       __ mfhi(scratch); | 
| 1035       __ mflo(result); | 1035       __ mflo(result); | 
| 1036       __ sra(at, result, 31); | 1036       __ sra(at, result, 31); | 
| 1037       DeoptimizeIf(ne, instr->environment(), scratch, Operand(at)); | 1037       DeoptimizeIf(ne, instr->environment(), scratch, Operand(at)); | 
| 1038     } else { | 1038     } else { | 
| 1039       __ mul(result, left, right); | 1039       __ Mul(result, left, right); | 
| 1040     } | 1040     } | 
| 1041 | 1041 | 
| 1042     if (bailout_on_minus_zero) { | 1042     if (bailout_on_minus_zero) { | 
| 1043       // Bail out if the result is supposed to be negative zero. | 1043       // Bail out if the result is supposed to be negative zero. | 
| 1044       Label done; | 1044       Label done; | 
| 1045       __ Branch(&done, ne, result, Operand(zero_reg)); | 1045       __ Branch(&done, ne, result, Operand(zero_reg)); | 
| 1046       DeoptimizeIf(lt, | 1046       DeoptimizeIf(lt, | 
| 1047                    instr->environment(), | 1047                    instr->environment(), | 
| 1048                    ToRegister(instr->TempAt(0)), | 1048                    ToRegister(instr->TempAt(0)), | 
| 1049                    Operand(zero_reg)); | 1049                    Operand(zero_reg)); | 
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| 2657   Register result = ToRegister(instr->result()); | 2657   Register result = ToRegister(instr->result()); | 
| 2658 | 2658 | 
| 2659   // Check if the calling frame is an arguments adaptor frame. | 2659   // Check if the calling frame is an arguments adaptor frame. | 
| 2660   Label done, adapted; | 2660   Label done, adapted; | 
| 2661   __ lw(scratch, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); | 2661   __ lw(scratch, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); | 
| 2662   __ lw(result, MemOperand(scratch, StandardFrameConstants::kContextOffset)); | 2662   __ lw(result, MemOperand(scratch, StandardFrameConstants::kContextOffset)); | 
| 2663   __ Xor(temp, result, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); | 2663   __ Xor(temp, result, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); | 
| 2664 | 2664 | 
| 2665   // Result is the frame pointer for the frame if not adapted and for the real | 2665   // Result is the frame pointer for the frame if not adapted and for the real | 
| 2666   // frame below the adaptor frame if adapted. | 2666   // frame below the adaptor frame if adapted. | 
| 2667   __ movn(result, fp, temp);  // move only if temp is not equal to zero (ne) | 2667   __ Movn(result, fp, temp);  // Move only if temp is not equal to zero (ne). | 
| 2668   __ movz(result, scratch, temp);  // move only if temp is equal to zero (eq) | 2668   __ Movz(result, scratch, temp);  // Move only if temp is equal to zero (eq). | 
| 2669 } | 2669 } | 
| 2670 | 2670 | 
| 2671 | 2671 | 
| 2672 void LCodeGen::DoArgumentsLength(LArgumentsLength* instr) { | 2672 void LCodeGen::DoArgumentsLength(LArgumentsLength* instr) { | 
| 2673   Register elem = ToRegister(instr->InputAt(0)); | 2673   Register elem = ToRegister(instr->InputAt(0)); | 
| 2674   Register result = ToRegister(instr->result()); | 2674   Register result = ToRegister(instr->result()); | 
| 2675 | 2675 | 
| 2676   Label done; | 2676   Label done; | 
| 2677 | 2677 | 
| 2678   // If no arguments adaptor frame the number of arguments is fixed. | 2678   // If no arguments adaptor frame the number of arguments is fixed. | 
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| 5046   __ Subu(scratch, result, scratch); | 5046   __ Subu(scratch, result, scratch); | 
| 5047   __ lw(result, FieldMemOperand(scratch, | 5047   __ lw(result, FieldMemOperand(scratch, | 
| 5048                                 FixedArray::kHeaderSize - kPointerSize)); | 5048                                 FixedArray::kHeaderSize - kPointerSize)); | 
| 5049   __ bind(&done); | 5049   __ bind(&done); | 
| 5050 } | 5050 } | 
| 5051 | 5051 | 
| 5052 | 5052 | 
| 5053 #undef __ | 5053 #undef __ | 
| 5054 | 5054 | 
| 5055 } }  // namespace v8::internal | 5055 } }  // namespace v8::internal | 
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