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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 #include <limits.h> // For LONG_MIN, LONG_MAX. | 5 #include <limits.h> // For LONG_MIN, LONG_MAX. |
6 | 6 |
7 #include "src/v8.h" | 7 #include "src/v8.h" |
8 | 8 |
9 #if V8_TARGET_ARCH_ARM | 9 #if V8_TARGET_ARCH_ARM |
10 | 10 |
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3610 } | 3610 } |
3611 } | 3611 } |
3612 | 3612 |
3613 | 3613 |
3614 void MacroAssembler::GetRelocatedValueLocation(Register ldr_location, | 3614 void MacroAssembler::GetRelocatedValueLocation(Register ldr_location, |
3615 Register result) { | 3615 Register result) { |
3616 const uint32_t kLdrOffsetMask = (1 << 12) - 1; | 3616 const uint32_t kLdrOffsetMask = (1 << 12) - 1; |
3617 ldr(result, MemOperand(ldr_location)); | 3617 ldr(result, MemOperand(ldr_location)); |
3618 if (emit_debug_code()) { | 3618 if (emit_debug_code()) { |
3619 // Check that the instruction is a ldr reg, [<pc or pp> + offset] . | 3619 // Check that the instruction is a ldr reg, [<pc or pp> + offset] . |
3620 if (FLAG_enable_ool_constant_pool) { | 3620 and_(result, result, Operand(GetConsantPoolLoadPattern())); |
3621 and_(result, result, Operand(kLdrPpPattern)); | 3621 cmp(result, Operand(GetConsantPoolLoadPattern())); |
3622 cmp(result, Operand(kLdrPpPattern)); | 3622 Check(eq, kTheInstructionToPatchShouldBeALoadFromConstantPool); |
3623 Check(eq, kTheInstructionToPatchShouldBeALoadFromPp); | |
3624 } else { | |
3625 and_(result, result, Operand(kLdrPCPattern)); | |
3626 cmp(result, Operand(kLdrPCPattern)); | |
3627 Check(eq, kTheInstructionToPatchShouldBeALoadFromPc); | |
3628 } | |
3629 // Result was clobbered. Restore it. | 3623 // Result was clobbered. Restore it. |
3630 ldr(result, MemOperand(ldr_location)); | 3624 ldr(result, MemOperand(ldr_location)); |
3631 } | 3625 } |
3632 // Get the address of the constant. | 3626 // Get the address of the constant. |
3633 and_(result, result, Operand(kLdrOffsetMask)); | 3627 and_(result, result, Operand(kLdrOffsetMask)); |
3634 if (FLAG_enable_ool_constant_pool) { | 3628 if (FLAG_enable_ool_constant_pool) { |
3635 add(result, pp, Operand(result)); | 3629 add(result, pp, Operand(result)); |
3636 } else { | 3630 } else { |
3637 add(result, ldr_location, Operand(result)); | 3631 add(result, ldr_location, Operand(result)); |
3638 add(result, result, Operand(Instruction::kPCReadOffset)); | 3632 add(result, result, Operand(Instruction::kPCReadOffset)); |
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4075 sub(result, result, Operand(dividend)); | 4069 sub(result, result, Operand(dividend)); |
4076 } | 4070 } |
4077 if (ms.shift() > 0) mov(result, Operand(result, ASR, ms.shift())); | 4071 if (ms.shift() > 0) mov(result, Operand(result, ASR, ms.shift())); |
4078 add(result, result, Operand(dividend, LSR, 31)); | 4072 add(result, result, Operand(dividend, LSR, 31)); |
4079 } | 4073 } |
4080 | 4074 |
4081 | 4075 |
4082 } } // namespace v8::internal | 4076 } } // namespace v8::internal |
4083 | 4077 |
4084 #endif // V8_TARGET_ARCH_ARM | 4078 #endif // V8_TARGET_ARCH_ARM |
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