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Issue 2622003004: [ic] Port {Load,Store}IC_Normal to TF (Closed)
Patch Set: fix nit Created 3 years, 11 months ago
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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 #if V8_TARGET_ARCH_MIPS 5 #if V8_TARGET_ARCH_MIPS
6 6
7 #include "src/code-stubs.h" 7 #include "src/code-stubs.h"
8 #include "src/api-arguments.h" 8 #include "src/api-arguments.h"
9 #include "src/base/bits.h" 9 #include "src/base/bits.h"
10 #include "src/bootstrapper.h" 10 #include "src/bootstrapper.h"
(...skipping 2818 matching lines...) Expand 10 before | Expand all | Expand 10 after
2829 __ li(a1, Operand(Handle<Name>(name))); 2829 __ li(a1, Operand(Handle<Name>(name)));
2830 NameDictionaryLookupStub stub(masm->isolate(), NEGATIVE_LOOKUP); 2830 NameDictionaryLookupStub stub(masm->isolate(), NEGATIVE_LOOKUP);
2831 __ CallStub(&stub); 2831 __ CallStub(&stub);
2832 __ mov(at, v0); 2832 __ mov(at, v0);
2833 __ MultiPop(spill_mask); 2833 __ MultiPop(spill_mask);
2834 2834
2835 __ Branch(done, eq, at, Operand(zero_reg)); 2835 __ Branch(done, eq, at, Operand(zero_reg));
2836 __ Branch(miss, ne, at, Operand(zero_reg)); 2836 __ Branch(miss, ne, at, Operand(zero_reg));
2837 } 2837 }
2838 2838
2839
2840 // Probe the name dictionary in the |elements| register. Jump to the
2841 // |done| label if a property with the given name is found. Jump to
2842 // the |miss| label otherwise.
2843 // If lookup was successful |scratch2| will be equal to elements + 4 * index.
2844 void NameDictionaryLookupStub::GeneratePositiveLookup(MacroAssembler* masm,
2845 Label* miss,
2846 Label* done,
2847 Register elements,
2848 Register name,
2849 Register scratch1,
2850 Register scratch2) {
2851 DCHECK(!elements.is(scratch1));
2852 DCHECK(!elements.is(scratch2));
2853 DCHECK(!name.is(scratch1));
2854 DCHECK(!name.is(scratch2));
2855
2856 __ AssertName(name);
2857
2858 // Compute the capacity mask.
2859 __ lw(scratch1, FieldMemOperand(elements, kCapacityOffset));
2860 __ sra(scratch1, scratch1, kSmiTagSize); // convert smi to int
2861 __ Subu(scratch1, scratch1, Operand(1));
2862
2863 // Generate an unrolled loop that performs a few probes before
2864 // giving up. Measurements done on Gmail indicate that 2 probes
2865 // cover ~93% of loads from dictionaries.
2866 for (int i = 0; i < kInlinedProbes; i++) {
2867 // Compute the masked index: (hash + i + i * i) & mask.
2868 __ lw(scratch2, FieldMemOperand(name, Name::kHashFieldOffset));
2869 if (i > 0) {
2870 // Add the probe offset (i + i * i) left shifted to avoid right shifting
2871 // the hash in a separate instruction. The value hash + i + i * i is right
2872 // shifted in the following and instruction.
2873 DCHECK(NameDictionary::GetProbeOffset(i) <
2874 1 << (32 - Name::kHashFieldOffset));
2875 __ Addu(scratch2, scratch2, Operand(
2876 NameDictionary::GetProbeOffset(i) << Name::kHashShift));
2877 }
2878 __ srl(scratch2, scratch2, Name::kHashShift);
2879 __ And(scratch2, scratch1, scratch2);
2880
2881 // Scale the index by multiplying by the element size.
2882 STATIC_ASSERT(NameDictionary::kEntrySize == 3);
2883 // scratch2 = scratch2 * 3.
2884
2885 __ Lsa(scratch2, scratch2, scratch2, 1);
2886
2887 // Check if the key is identical to the name.
2888 __ Lsa(scratch2, elements, scratch2, 2);
2889 __ lw(at, FieldMemOperand(scratch2, kElementsStartOffset));
2890 __ Branch(done, eq, name, Operand(at));
2891 }
2892
2893 const int spill_mask =
2894 (ra.bit() | t2.bit() | t1.bit() | t0.bit() |
2895 a3.bit() | a2.bit() | a1.bit() | a0.bit() | v0.bit()) &
2896 ~(scratch1.bit() | scratch2.bit());
2897
2898 __ MultiPush(spill_mask);
2899 if (name.is(a0)) {
2900 DCHECK(!elements.is(a1));
2901 __ Move(a1, name);
2902 __ Move(a0, elements);
2903 } else {
2904 __ Move(a0, elements);
2905 __ Move(a1, name);
2906 }
2907 NameDictionaryLookupStub stub(masm->isolate(), POSITIVE_LOOKUP);
2908 __ CallStub(&stub);
2909 __ mov(scratch2, a2);
2910 __ mov(at, v0);
2911 __ MultiPop(spill_mask);
2912
2913 __ Branch(done, ne, at, Operand(zero_reg));
2914 __ Branch(miss, eq, at, Operand(zero_reg));
2915 }
2916
2917
2918 void NameDictionaryLookupStub::Generate(MacroAssembler* masm) { 2839 void NameDictionaryLookupStub::Generate(MacroAssembler* masm) {
2919 // This stub overrides SometimesSetsUpAFrame() to return false. That means 2840 // This stub overrides SometimesSetsUpAFrame() to return false. That means
2920 // we cannot call anything that could cause a GC from this stub. 2841 // we cannot call anything that could cause a GC from this stub.
2921 // Registers: 2842 // Registers:
2922 // result: NameDictionary to probe 2843 // result: NameDictionary to probe
2923 // a1: key 2844 // a1: key
2924 // dictionary: NameDictionary to probe. 2845 // dictionary: NameDictionary to probe.
2925 // index: will hold an index of entry if lookup is successful. 2846 // index: will hold an index of entry if lookup is successful.
2926 // might alias with result_. 2847 // might alias with result_.
2927 // Returns: 2848 // Returns:
(...skipping 1437 matching lines...) Expand 10 before | Expand all | Expand 10 after
4365 kStackUnwindSpace, kInvalidStackOffset, 4286 kStackUnwindSpace, kInvalidStackOffset,
4366 return_value_operand, NULL); 4287 return_value_operand, NULL);
4367 } 4288 }
4368 4289
4369 #undef __ 4290 #undef __
4370 4291
4371 } // namespace internal 4292 } // namespace internal
4372 } // namespace v8 4293 } // namespace v8
4373 4294
4374 #endif // V8_TARGET_ARCH_MIPS 4295 #endif // V8_TARGET_ARCH_MIPS
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