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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 |
| (...skipping 771 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
| 782 const double src2, | 782 const double src2, |
| 783 const Register fpscr_flags, | 783 const Register fpscr_flags, |
| 784 const Condition cond) { | 784 const Condition cond) { |
| 785 // Compare and load FPSCR. | 785 // Compare and load FPSCR. |
| 786 vcmp(src1, src2, cond); | 786 vcmp(src1, src2, cond); |
| 787 vmrs(fpscr_flags, cond); | 787 vmrs(fpscr_flags, cond); |
| 788 } | 788 } |
| 789 | 789 |
| 790 void MacroAssembler::Vmov(const DwVfpRegister dst, | 790 void MacroAssembler::Vmov(const DwVfpRegister dst, |
| 791 const double imm, | 791 const double imm, |
| 792 const Register scratch, | |
| 793 const Condition cond) { | 792 const Condition cond) { |
| 794 ASSERT(CpuFeatures::IsEnabled(VFP2)); | 793 ASSERT(CpuFeatures::IsEnabled(VFP2)); |
| 795 static const DoubleRepresentation minus_zero(-0.0); | 794 static const DoubleRepresentation minus_zero(-0.0); |
| 796 static const DoubleRepresentation zero(0.0); | 795 static const DoubleRepresentation zero(0.0); |
| 797 DoubleRepresentation value(imm); | 796 DoubleRepresentation value(imm); |
| 798 // Handle special values first. | 797 // Handle special values first. |
| 799 if (value.bits == zero.bits) { | 798 if (value.bits == zero.bits) { |
| 800 vmov(dst, kDoubleRegZero, cond); | 799 vmov(dst, kDoubleRegZero, cond); |
| 801 } else if (value.bits == minus_zero.bits) { | 800 } else if (value.bits == minus_zero.bits) { |
| 802 vneg(dst, kDoubleRegZero, cond); | 801 vneg(dst, kDoubleRegZero, cond); |
| 803 } else { | 802 } else { |
| 804 vmov(dst, imm, scratch, cond); | 803 vmov(dst, imm, cond); |
| 805 } | 804 } |
| 806 } | 805 } |
| 807 | 806 |
| 808 | 807 |
| 809 void MacroAssembler::EnterFrame(StackFrame::Type type) { | 808 void MacroAssembler::EnterFrame(StackFrame::Type type) { |
| 810 // r0-r3: preserved | 809 // r0-r3: preserved |
| 811 stm(db_w, sp, cp.bit() | fp.bit() | lr.bit()); | 810 stm(db_w, sp, cp.bit() | fp.bit() | lr.bit()); |
| 812 mov(ip, Operand(Smi::FromInt(type))); | 811 mov(ip, Operand(Smi::FromInt(type))); |
| 813 push(ip); | 812 push(ip); |
| 814 mov(ip, Operand(CodeObject())); | 813 mov(ip, Operand(CodeObject())); |
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| 1981 Operand(key_reg, LSL, kDoubleSizeLog2 - kSmiTagSize)); | 1980 Operand(key_reg, LSL, kDoubleSizeLog2 - kSmiTagSize)); |
| 1982 // scratch1 is now effective address of the double element | 1981 // scratch1 is now effective address of the double element |
| 1983 | 1982 |
| 1984 FloatingPointHelper::Destination destination; | 1983 FloatingPointHelper::Destination destination; |
| 1985 if (CpuFeatures::IsSupported(VFP2)) { | 1984 if (CpuFeatures::IsSupported(VFP2)) { |
| 1986 destination = FloatingPointHelper::kVFPRegisters; | 1985 destination = FloatingPointHelper::kVFPRegisters; |
| 1987 } else { | 1986 } else { |
| 1988 destination = FloatingPointHelper::kCoreRegisters; | 1987 destination = FloatingPointHelper::kCoreRegisters; |
| 1989 } | 1988 } |
| 1990 | 1989 |
| 1991 Register untagged_value = elements_reg; | 1990 Register untagged_value = receiver_reg; |
| 1992 SmiUntag(untagged_value, value_reg); | 1991 SmiUntag(untagged_value, value_reg); |
| 1993 FloatingPointHelper::ConvertIntToDouble(this, | 1992 FloatingPointHelper::ConvertIntToDouble(this, |
| 1994 untagged_value, | 1993 untagged_value, |
| 1995 destination, | 1994 destination, |
| 1996 d0, | 1995 d0, |
| 1997 mantissa_reg, | 1996 mantissa_reg, |
| 1998 exponent_reg, | 1997 exponent_reg, |
| 1999 scratch4, | 1998 scratch4, |
| 2000 s2); | 1999 s2); |
| 2001 if (destination == FloatingPointHelper::kVFPRegisters) { | 2000 if (destination == FloatingPointHelper::kVFPRegisters) { |
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| 3670 Vmov(temp_double_reg, 0.0); | 3669 Vmov(temp_double_reg, 0.0); |
| 3671 VFPCompareAndSetFlags(input_reg, temp_double_reg); | 3670 VFPCompareAndSetFlags(input_reg, temp_double_reg); |
| 3672 b(gt, &above_zero); | 3671 b(gt, &above_zero); |
| 3673 | 3672 |
| 3674 // Double value is less than zero, NaN or Inf, return 0. | 3673 // Double value is less than zero, NaN or Inf, return 0. |
| 3675 mov(result_reg, Operand(0)); | 3674 mov(result_reg, Operand(0)); |
| 3676 b(al, &done); | 3675 b(al, &done); |
| 3677 | 3676 |
| 3678 // Double value is >= 255, return 255. | 3677 // Double value is >= 255, return 255. |
| 3679 bind(&above_zero); | 3678 bind(&above_zero); |
| 3680 Vmov(temp_double_reg, 255.0, result_reg); | 3679 Vmov(temp_double_reg, 255.0); |
| 3681 VFPCompareAndSetFlags(input_reg, temp_double_reg); | 3680 VFPCompareAndSetFlags(input_reg, temp_double_reg); |
| 3682 b(le, &in_bounds); | 3681 b(le, &in_bounds); |
| 3683 mov(result_reg, Operand(255)); | 3682 mov(result_reg, Operand(255)); |
| 3684 b(al, &done); | 3683 b(al, &done); |
| 3685 | 3684 |
| 3686 // In 0-255 range, round and truncate. | 3685 // In 0-255 range, round and truncate. |
| 3687 bind(&in_bounds); | 3686 bind(&in_bounds); |
| 3688 // Save FPSCR. | 3687 // Save FPSCR. |
| 3689 vmrs(ip); | 3688 vmrs(ip); |
| 3690 // Set rounding mode to round to the nearest integer by clearing bits[23:22]. | 3689 // Set rounding mode to round to the nearest integer by clearing bits[23:22]. |
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| 3723 bind(&load_from_back_pointer); | 3722 bind(&load_from_back_pointer); |
| 3724 ldr(temp, FieldMemOperand(temp, Map::kTransitionsOrBackPointerOffset)); | 3723 ldr(temp, FieldMemOperand(temp, Map::kTransitionsOrBackPointerOffset)); |
| 3725 ldr(temp, FieldMemOperand(temp, TransitionArray::kDescriptorsPointerOffset)); | 3724 ldr(temp, FieldMemOperand(temp, TransitionArray::kDescriptorsPointerOffset)); |
| 3726 ldr(descriptors, FieldMemOperand(temp, JSGlobalPropertyCell::kValueOffset)); | 3725 ldr(descriptors, FieldMemOperand(temp, JSGlobalPropertyCell::kValueOffset)); |
| 3727 | 3726 |
| 3728 bind(&ok); | 3727 bind(&ok); |
| 3729 } | 3728 } |
| 3730 | 3729 |
| 3731 | 3730 |
| 3732 void MacroAssembler::NumberOfOwnDescriptors(Register dst, Register map) { | 3731 void MacroAssembler::NumberOfOwnDescriptors(Register dst, Register map) { |
| 3733 ldr(dst, FieldMemOperand(map, Map::kBitField3Offset)); | 3732 ldr(dst, FieldMemOperand(map, Map::kBitFieldOffset)); |
| 3734 DecodeField<Map::NumberOfOwnDescriptorsBits>(dst); | 3733 DecodeField<Map::NumberOfOwnDescriptorsBits>(dst); |
| 3735 } | 3734 } |
| 3736 | 3735 |
| 3737 | 3736 |
| 3738 void MacroAssembler::EnumLength(Register dst, Register map) { | 3737 void MacroAssembler::EnumLength(Register dst, Register map) { |
| 3739 STATIC_ASSERT(Map::EnumLengthBits::kShift == 0); | 3738 STATIC_ASSERT(Map::EnumLengthBits::kShift == 0); |
| 3740 ldr(dst, FieldMemOperand(map, Map::kBitField3Offset)); | 3739 ldr(dst, FieldMemOperand(map, Map::kBitField3Offset)); |
| 3741 and_(dst, dst, Operand(Smi::FromInt(Map::EnumLengthBits::kMask))); | 3740 and_(dst, dst, Operand(Smi::FromInt(Map::EnumLengthBits::kMask))); |
| 3742 } | 3741 } |
| 3743 | 3742 |
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| 3839 void CodePatcher::EmitCondition(Condition cond) { | 3838 void CodePatcher::EmitCondition(Condition cond) { |
| 3840 Instr instr = Assembler::instr_at(masm_.pc_); | 3839 Instr instr = Assembler::instr_at(masm_.pc_); |
| 3841 instr = (instr & ~kCondMask) | cond; | 3840 instr = (instr & ~kCondMask) | cond; |
| 3842 masm_.emit(instr); | 3841 masm_.emit(instr); |
| 3843 } | 3842 } |
| 3844 | 3843 |
| 3845 | 3844 |
| 3846 } } // namespace v8::internal | 3845 } } // namespace v8::internal |
| 3847 | 3846 |
| 3848 #endif // V8_TARGET_ARCH_ARM | 3847 #endif // V8_TARGET_ARCH_ARM |
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