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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 "src/v8.h" | 5 #include "src/v8.h" |
6 | 6 |
7 #if V8_TARGET_ARCH_X64 | 7 #if V8_TARGET_ARCH_X64 |
8 | 8 |
9 #include "src/codegen.h" | 9 #include "src/codegen.h" |
10 #include "src/ic/ic.h" | 10 #include "src/ic/ic.h" |
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23 // The offset is scaled by 4, based on | 23 // The offset is scaled by 4, based on |
24 // kCacheIndexShift, which is two bits | 24 // kCacheIndexShift, which is two bits |
25 Register offset) { | 25 Register offset) { |
26 // We need to scale up the pointer by 2 when the offset is scaled by less | 26 // We need to scale up the pointer by 2 when the offset is scaled by less |
27 // than the pointer size. | 27 // than the pointer size. |
28 DCHECK(kPointerSize == kInt64Size | 28 DCHECK(kPointerSize == kInt64Size |
29 ? kPointerSizeLog2 == StubCache::kCacheIndexShift + 1 | 29 ? kPointerSizeLog2 == StubCache::kCacheIndexShift + 1 |
30 : kPointerSizeLog2 == StubCache::kCacheIndexShift); | 30 : kPointerSizeLog2 == StubCache::kCacheIndexShift); |
31 ScaleFactor scale_factor = kPointerSize == kInt64Size ? times_2 : times_1; | 31 ScaleFactor scale_factor = kPointerSize == kInt64Size ? times_2 : times_1; |
32 | 32 |
33 DCHECK_EQ(3 * kPointerSize, sizeof(StubCache::Entry)); | 33 DCHECK_EQ(3u * kPointerSize, sizeof(StubCache::Entry)); |
34 // The offset register holds the entry offset times four (due to masking | 34 // The offset register holds the entry offset times four (due to masking |
35 // and shifting optimizations). | 35 // and shifting optimizations). |
36 ExternalReference key_offset(isolate->stub_cache()->key_reference(table)); | 36 ExternalReference key_offset(isolate->stub_cache()->key_reference(table)); |
37 ExternalReference value_offset(isolate->stub_cache()->value_reference(table)); | 37 ExternalReference value_offset(isolate->stub_cache()->value_reference(table)); |
38 Label miss; | 38 Label miss; |
39 | 39 |
40 // Multiply by 3 because there are 3 fields per entry (name, code, map). | 40 // Multiply by 3 because there are 3 fields per entry (name, code, map). |
41 __ leap(offset, Operand(offset, offset, times_2, 0)); | 41 __ leap(offset, Operand(offset, offset, times_2, 0)); |
42 | 42 |
43 __ LoadAddress(kScratchRegister, key_offset); | 43 __ LoadAddress(kScratchRegister, key_offset); |
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158 __ bind(&miss); | 158 __ bind(&miss); |
159 __ IncrementCounter(counters->megamorphic_stub_cache_misses(), 1); | 159 __ IncrementCounter(counters->megamorphic_stub_cache_misses(), 1); |
160 } | 160 } |
161 | 161 |
162 | 162 |
163 #undef __ | 163 #undef __ |
164 } | 164 } |
165 } // namespace v8::internal | 165 } // namespace v8::internal |
166 | 166 |
167 #endif // V8_TARGET_ARCH_X64 | 167 #endif // V8_TARGET_ARCH_X64 |
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