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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 #if V8_TARGET_ARCH_ARM | 7 #if V8_TARGET_ARCH_ARM |
| 8 | 8 |
| 9 #include "src/base/bits.h" | 9 #include "src/base/bits.h" |
| 10 #include "src/base/division-by-constant.h" | 10 #include "src/base/division-by-constant.h" |
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| 1962 ldr(result, FieldMemOperand(t2, kValueOffset)); | 1962 ldr(result, FieldMemOperand(t2, kValueOffset)); |
| 1963 } | 1963 } |
| 1964 | 1964 |
| 1965 | 1965 |
| 1966 void MacroAssembler::Allocate(int object_size, | 1966 void MacroAssembler::Allocate(int object_size, |
| 1967 Register result, | 1967 Register result, |
| 1968 Register scratch1, | 1968 Register scratch1, |
| 1969 Register scratch2, | 1969 Register scratch2, |
| 1970 Label* gc_required, | 1970 Label* gc_required, |
| 1971 AllocationFlags flags) { | 1971 AllocationFlags flags) { |
| 1972 DCHECK(object_size <= Page::kMaxRegularHeapObjectSize); | 1972 DCHECK(object_size <= kMaxRegularHeapObjectSize); |
| 1973 DCHECK((flags & ALLOCATION_FOLDED) == 0); | 1973 DCHECK((flags & ALLOCATION_FOLDED) == 0); |
| 1974 if (!FLAG_inline_new) { | 1974 if (!FLAG_inline_new) { |
| 1975 if (emit_debug_code()) { | 1975 if (emit_debug_code()) { |
| 1976 // Trash the registers to simulate an allocation failure. | 1976 // Trash the registers to simulate an allocation failure. |
| 1977 mov(result, Operand(0x7091)); | 1977 mov(result, Operand(0x7091)); |
| 1978 mov(scratch1, Operand(0x7191)); | 1978 mov(scratch1, Operand(0x7191)); |
| 1979 mov(scratch2, Operand(0x7291)); | 1979 mov(scratch2, Operand(0x7291)); |
| 1980 } | 1980 } |
| 1981 jmp(gc_required); | 1981 jmp(gc_required); |
| 1982 return; | 1982 return; |
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| 2217 } | 2217 } |
| 2218 // The top pointer is not updated for allocation folding dominators. | 2218 // The top pointer is not updated for allocation folding dominators. |
| 2219 str(result_end, MemOperand(top_address)); | 2219 str(result_end, MemOperand(top_address)); |
| 2220 | 2220 |
| 2221 add(result, result, Operand(kHeapObjectTag)); | 2221 add(result, result, Operand(kHeapObjectTag)); |
| 2222 } | 2222 } |
| 2223 | 2223 |
| 2224 void MacroAssembler::FastAllocate(int object_size, Register result, | 2224 void MacroAssembler::FastAllocate(int object_size, Register result, |
| 2225 Register scratch1, Register scratch2, | 2225 Register scratch1, Register scratch2, |
| 2226 AllocationFlags flags) { | 2226 AllocationFlags flags) { |
| 2227 DCHECK(object_size <= Page::kMaxRegularHeapObjectSize); | 2227 DCHECK(object_size <= kMaxRegularHeapObjectSize); |
| 2228 DCHECK(!AreAliased(result, scratch1, scratch2, ip)); | 2228 DCHECK(!AreAliased(result, scratch1, scratch2, ip)); |
| 2229 | 2229 |
| 2230 // Make object size into bytes. | 2230 // Make object size into bytes. |
| 2231 if ((flags & SIZE_IN_WORDS) != 0) { | 2231 if ((flags & SIZE_IN_WORDS) != 0) { |
| 2232 object_size *= kPointerSize; | 2232 object_size *= kPointerSize; |
| 2233 } | 2233 } |
| 2234 DCHECK_EQ(0, object_size & kObjectAlignmentMask); | 2234 DCHECK_EQ(0, object_size & kObjectAlignmentMask); |
| 2235 | 2235 |
| 2236 ExternalReference allocation_top = | 2236 ExternalReference allocation_top = |
| 2237 AllocationUtils::GetAllocationTopReference(isolate(), flags); | 2237 AllocationUtils::GetAllocationTopReference(isolate(), flags); |
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| 4026 } | 4026 } |
| 4027 } | 4027 } |
| 4028 if (mag.shift > 0) mov(result, Operand(result, ASR, mag.shift)); | 4028 if (mag.shift > 0) mov(result, Operand(result, ASR, mag.shift)); |
| 4029 add(result, result, Operand(dividend, LSR, 31)); | 4029 add(result, result, Operand(dividend, LSR, 31)); |
| 4030 } | 4030 } |
| 4031 | 4031 |
| 4032 } // namespace internal | 4032 } // namespace internal |
| 4033 } // namespace v8 | 4033 } // namespace v8 |
| 4034 | 4034 |
| 4035 #endif // V8_TARGET_ARCH_ARM | 4035 #endif // V8_TARGET_ARCH_ARM |
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