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| 1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 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 <assert.h> // For assert | 5 #include <assert.h> // For assert |
| 6 #include <limits.h> // For LONG_MIN, LONG_MAX. | 6 #include <limits.h> // For LONG_MIN, LONG_MAX. |
| 7 | 7 |
| 8 #if V8_TARGET_ARCH_S390 | 8 #if V8_TARGET_ARCH_S390 |
| 9 | 9 |
| 10 #include "src/base/bits.h" | 10 #include "src/base/bits.h" |
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| 1632 | 1632 |
| 1633 if ((flags & ALLOCATION_FOLDING_DOMINATOR) == 0) { | 1633 if ((flags & ALLOCATION_FOLDING_DOMINATOR) == 0) { |
| 1634 // The top pointer is not updated for allocation folding dominators. | 1634 // The top pointer is not updated for allocation folding dominators. |
| 1635 StoreP(result_end, MemOperand(top_address)); | 1635 StoreP(result_end, MemOperand(top_address)); |
| 1636 } | 1636 } |
| 1637 | 1637 |
| 1638 if (CpuFeatures::IsSupported(GENERAL_INSTR_EXT)) { | 1638 if (CpuFeatures::IsSupported(GENERAL_INSTR_EXT)) { |
| 1639 // Prefetch the allocation_top's next cache line in advance to | 1639 // Prefetch the allocation_top's next cache line in advance to |
| 1640 // help alleviate potential cache misses. | 1640 // help alleviate potential cache misses. |
| 1641 // Mode 2 - Prefetch the data into a cache line for store access. | 1641 // Mode 2 - Prefetch the data into a cache line for store access. |
| 1642 pfd(r2, MemOperand(result, 256)); | 1642 pfd(static_cast<Condition>(2), MemOperand(result, 256)); |
| 1643 } | 1643 } |
| 1644 | 1644 |
| 1645 // Tag object. | 1645 // Tag object. |
| 1646 la(result, MemOperand(result, kHeapObjectTag)); | 1646 la(result, MemOperand(result, kHeapObjectTag)); |
| 1647 } | 1647 } |
| 1648 | 1648 |
| 1649 void MacroAssembler::Allocate(Register object_size, Register result, | 1649 void MacroAssembler::Allocate(Register object_size, Register result, |
| 1650 Register result_end, Register scratch, | 1650 Register result_end, Register scratch, |
| 1651 Label* gc_required, AllocationFlags flags) { | 1651 Label* gc_required, AllocationFlags flags) { |
| 1652 DCHECK((flags & ALLOCATION_FOLDED) == 0); | 1652 DCHECK((flags & ALLOCATION_FOLDED) == 0); |
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| 1731 } | 1731 } |
| 1732 if ((flags & ALLOCATION_FOLDING_DOMINATOR) == 0) { | 1732 if ((flags & ALLOCATION_FOLDING_DOMINATOR) == 0) { |
| 1733 // The top pointer is not updated for allocation folding dominators. | 1733 // The top pointer is not updated for allocation folding dominators. |
| 1734 StoreP(result_end, MemOperand(top_address)); | 1734 StoreP(result_end, MemOperand(top_address)); |
| 1735 } | 1735 } |
| 1736 | 1736 |
| 1737 if (CpuFeatures::IsSupported(GENERAL_INSTR_EXT)) { | 1737 if (CpuFeatures::IsSupported(GENERAL_INSTR_EXT)) { |
| 1738 // Prefetch the allocation_top's next cache line in advance to | 1738 // Prefetch the allocation_top's next cache line in advance to |
| 1739 // help alleviate potential cache misses. | 1739 // help alleviate potential cache misses. |
| 1740 // Mode 2 - Prefetch the data into a cache line for store access. | 1740 // Mode 2 - Prefetch the data into a cache line for store access. |
| 1741 pfd(r2, MemOperand(result, 256)); | 1741 pfd(static_cast<Condition>(2), MemOperand(result, 256)); |
| 1742 } | 1742 } |
| 1743 | 1743 |
| 1744 // Tag object. | 1744 // Tag object. |
| 1745 la(result, MemOperand(result, kHeapObjectTag)); | 1745 la(result, MemOperand(result, kHeapObjectTag)); |
| 1746 } | 1746 } |
| 1747 | 1747 |
| 1748 void MacroAssembler::FastAllocate(Register object_size, Register result, | 1748 void MacroAssembler::FastAllocate(Register object_size, Register result, |
| 1749 Register result_end, Register scratch, | 1749 Register result_end, Register scratch, |
| 1750 AllocationFlags flags) { | 1750 AllocationFlags flags) { |
| 1751 // |object_size| and |result_end| may overlap if the DOUBLE_ALIGNMENT flag | 1751 // |object_size| and |result_end| may overlap if the DOUBLE_ALIGNMENT flag |
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| 1791 if (emit_debug_code()) { | 1791 if (emit_debug_code()) { |
| 1792 AndP(r0, result_end, Operand(kObjectAlignmentMask)); | 1792 AndP(r0, result_end, Operand(kObjectAlignmentMask)); |
| 1793 Check(eq, kUnalignedAllocationInNewSpace, cr0); | 1793 Check(eq, kUnalignedAllocationInNewSpace, cr0); |
| 1794 } | 1794 } |
| 1795 StoreP(result_end, MemOperand(top_address)); | 1795 StoreP(result_end, MemOperand(top_address)); |
| 1796 | 1796 |
| 1797 if (CpuFeatures::IsSupported(GENERAL_INSTR_EXT)) { | 1797 if (CpuFeatures::IsSupported(GENERAL_INSTR_EXT)) { |
| 1798 // Prefetch the allocation_top's next cache line in advance to | 1798 // Prefetch the allocation_top's next cache line in advance to |
| 1799 // help alleviate potential cache misses. | 1799 // help alleviate potential cache misses. |
| 1800 // Mode 2 - Prefetch the data into a cache line for store access. | 1800 // Mode 2 - Prefetch the data into a cache line for store access. |
| 1801 pfd(r2, MemOperand(result, 256)); | 1801 pfd(static_cast<Condition>(2), MemOperand(result, 256)); |
| 1802 } | 1802 } |
| 1803 | 1803 |
| 1804 // Tag object. | 1804 // Tag object. |
| 1805 la(result, MemOperand(result, kHeapObjectTag)); | 1805 la(result, MemOperand(result, kHeapObjectTag)); |
| 1806 } | 1806 } |
| 1807 | 1807 |
| 1808 void MacroAssembler::FastAllocate(int object_size, Register result, | 1808 void MacroAssembler::FastAllocate(int object_size, Register result, |
| 1809 Register scratch1, Register scratch2, | 1809 Register scratch1, Register scratch2, |
| 1810 AllocationFlags flags) { | 1810 AllocationFlags flags) { |
| 1811 DCHECK(object_size <= kMaxRegularHeapObjectSize); | 1811 DCHECK(object_size <= kMaxRegularHeapObjectSize); |
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| 1859 // Calculate new top using result. | 1859 // Calculate new top using result. |
| 1860 AddP(result_end, result, Operand(object_size)); | 1860 AddP(result_end, result, Operand(object_size)); |
| 1861 // Update allocation top. | 1861 // Update allocation top. |
| 1862 StoreP(result_end, MemOperand(top_address)); | 1862 StoreP(result_end, MemOperand(top_address)); |
| 1863 #endif | 1863 #endif |
| 1864 | 1864 |
| 1865 if (CpuFeatures::IsSupported(GENERAL_INSTR_EXT)) { | 1865 if (CpuFeatures::IsSupported(GENERAL_INSTR_EXT)) { |
| 1866 // Prefetch the allocation_top's next cache line in advance to | 1866 // Prefetch the allocation_top's next cache line in advance to |
| 1867 // help alleviate potential cache misses. | 1867 // help alleviate potential cache misses. |
| 1868 // Mode 2 - Prefetch the data into a cache line for store access. | 1868 // Mode 2 - Prefetch the data into a cache line for store access. |
| 1869 pfd(r2, MemOperand(result, 256)); | 1869 pfd(static_cast<Condition>(2), MemOperand(result, 256)); |
| 1870 } | 1870 } |
| 1871 | 1871 |
| 1872 // Tag object. | 1872 // Tag object. |
| 1873 la(result, MemOperand(result, kHeapObjectTag)); | 1873 la(result, MemOperand(result, kHeapObjectTag)); |
| 1874 } | 1874 } |
| 1875 | 1875 |
| 1876 void MacroAssembler::CompareObjectType(Register object, Register map, | 1876 void MacroAssembler::CompareObjectType(Register object, Register map, |
| 1877 Register type_reg, InstanceType type) { | 1877 Register type_reg, InstanceType type) { |
| 1878 const Register temp = type_reg.is(no_reg) ? r0 : type_reg; | 1878 const Register temp = type_reg.is(no_reg) ? r0 : type_reg; |
| 1879 | 1879 |
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| 5363 } | 5363 } |
| 5364 if (mag.shift > 0) ShiftRightArith(result, result, Operand(mag.shift)); | 5364 if (mag.shift > 0) ShiftRightArith(result, result, Operand(mag.shift)); |
| 5365 ExtractBit(r0, dividend, 31); | 5365 ExtractBit(r0, dividend, 31); |
| 5366 AddP(result, r0); | 5366 AddP(result, r0); |
| 5367 } | 5367 } |
| 5368 | 5368 |
| 5369 } // namespace internal | 5369 } // namespace internal |
| 5370 } // namespace v8 | 5370 } // namespace v8 |
| 5371 | 5371 |
| 5372 #endif // V8_TARGET_ARCH_S390 | 5372 #endif // V8_TARGET_ARCH_S390 |
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