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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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4000 __ add(r0, r0, Operand(r1, LSL, 14)); | 4000 __ add(r0, r0, Operand(r1, LSL, 14)); |
4001 | 4001 |
4002 __ bind(deferred->exit()); | 4002 __ bind(deferred->exit()); |
4003 // 0x41300000 is the top half of 1.0 x 2^20 as a double. | 4003 // 0x41300000 is the top half of 1.0 x 2^20 as a double. |
4004 // Create this constant using mov/orr to avoid PC relative load. | 4004 // Create this constant using mov/orr to avoid PC relative load. |
4005 __ mov(r1, Operand(0x41000000)); | 4005 __ mov(r1, Operand(0x41000000)); |
4006 __ orr(r1, r1, Operand(0x300000)); | 4006 __ orr(r1, r1, Operand(0x300000)); |
4007 // Move 0x41300000xxxxxxxx (x = random bits) to VFP. | 4007 // Move 0x41300000xxxxxxxx (x = random bits) to VFP. |
4008 __ vmov(d7, r0, r1); | 4008 __ vmov(d7, r0, r1); |
4009 // Move 0x4130000000000000 to VFP. | 4009 // Move 0x4130000000000000 to VFP. |
4010 __ mov(r0, Operand(0, RelocInfo::NONE)); | 4010 __ mov(r0, Operand(0, RelocInfo::NONE32)); |
4011 __ vmov(d8, r0, r1); | 4011 __ vmov(d8, r0, r1); |
4012 // Subtract and store the result in the heap number. | 4012 // Subtract and store the result in the heap number. |
4013 __ vsub(d7, d7, d8); | 4013 __ vsub(d7, d7, d8); |
4014 } | 4014 } |
4015 | 4015 |
4016 | 4016 |
4017 void LCodeGen::DoDeferredRandom(LRandom* instr) { | 4017 void LCodeGen::DoDeferredRandom(LRandom* instr) { |
4018 __ PrepareCallCFunction(1, scratch0()); | 4018 __ PrepareCallCFunction(1, scratch0()); |
4019 __ CallCFunction(ExternalReference::random_uint32_function(isolate()), 1); | 4019 __ CallCFunction(ExternalReference::random_uint32_function(isolate()), 1); |
4020 // Return value is in r0. | 4020 // Return value is in r0. |
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4756 const int mantissa_shift_for_hi_word = | 4756 const int mantissa_shift_for_hi_word = |
4757 meaningful_bits - HeapNumber::kMantissaBitsInTopWord; | 4757 meaningful_bits - HeapNumber::kMantissaBitsInTopWord; |
4758 const int mantissa_shift_for_lo_word = | 4758 const int mantissa_shift_for_lo_word = |
4759 kBitsPerInt - mantissa_shift_for_hi_word; | 4759 kBitsPerInt - mantissa_shift_for_hi_word; |
4760 masm->mov(scratch, Operand(biased_exponent << HeapNumber::kExponentShift)); | 4760 masm->mov(scratch, Operand(biased_exponent << HeapNumber::kExponentShift)); |
4761 if (mantissa_shift_for_hi_word > 0) { | 4761 if (mantissa_shift_for_hi_word > 0) { |
4762 masm->mov(loword, Operand(hiword, LSL, mantissa_shift_for_lo_word)); | 4762 masm->mov(loword, Operand(hiword, LSL, mantissa_shift_for_lo_word)); |
4763 masm->orr(hiword, scratch, | 4763 masm->orr(hiword, scratch, |
4764 Operand(hiword, LSR, mantissa_shift_for_hi_word)); | 4764 Operand(hiword, LSR, mantissa_shift_for_hi_word)); |
4765 } else { | 4765 } else { |
4766 masm->mov(loword, Operand(0, RelocInfo::NONE)); | 4766 masm->mov(loword, Operand(0, RelocInfo::NONE32)); |
4767 masm->orr(hiword, scratch, | 4767 masm->orr(hiword, scratch, |
4768 Operand(hiword, LSL, -mantissa_shift_for_hi_word)); | 4768 Operand(hiword, LSL, -mantissa_shift_for_hi_word)); |
4769 } | 4769 } |
4770 | 4770 |
4771 // If least significant bit of biased exponent was not 1 it was corrupted | 4771 // If least significant bit of biased exponent was not 1 it was corrupted |
4772 // by most significant bit of mantissa so we should fix that. | 4772 // by most significant bit of mantissa so we should fix that. |
4773 if (!(biased_exponent & 1)) { | 4773 if (!(biased_exponent & 1)) { |
4774 masm->bic(hiword, hiword, Operand(1 << HeapNumber::kExponentShift)); | 4774 masm->bic(hiword, hiword, Operand(1 << HeapNumber::kExponentShift)); |
4775 } | 4775 } |
4776 } | 4776 } |
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6082 __ sub(scratch, result, Operand(index, LSL, kPointerSizeLog2 - kSmiTagSize)); | 6082 __ sub(scratch, result, Operand(index, LSL, kPointerSizeLog2 - kSmiTagSize)); |
6083 __ ldr(result, FieldMemOperand(scratch, | 6083 __ ldr(result, FieldMemOperand(scratch, |
6084 FixedArray::kHeaderSize - kPointerSize)); | 6084 FixedArray::kHeaderSize - kPointerSize)); |
6085 __ bind(&done); | 6085 __ bind(&done); |
6086 } | 6086 } |
6087 | 6087 |
6088 | 6088 |
6089 #undef __ | 6089 #undef __ |
6090 | 6090 |
6091 } } // namespace v8::internal | 6091 } } // namespace v8::internal |
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