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Unified Diff: src/arm64/decoder-arm64-inl.h

Issue 2785183005: Revert "ARM64: Add NEON support" (Closed)
Patch Set: Created 3 years, 9 months ago
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Index: src/arm64/decoder-arm64-inl.h
diff --git a/src/arm64/decoder-arm64-inl.h b/src/arm64/decoder-arm64-inl.h
index 6718bd3d6899942216f547f51be6066b0d6f7d87..2405f8783000751dbc5f030772d36ff7486bfe6f 100644
--- a/src/arm64/decoder-arm64-inl.h
+++ b/src/arm64/decoder-arm64-inl.h
@@ -213,11 +213,6 @@ void Decoder<V>::DecodeLoadStore(Instruction* instr) {
(instr->Bits(27, 24) == 0xC) ||
(instr->Bits(27, 24) == 0xD) );
- if ((instr->Bit(28) == 0) && (instr->Bit(29) == 0) && (instr->Bit(26) == 1)) {
- DecodeNEONLoadStore(instr);
- return;
- }
-
if (instr->Bit(24) == 0) {
if (instr->Bit(28) == 0) {
if (instr->Bit(29) == 0) {
@@ -231,6 +226,8 @@ void Decoder<V>::DecodeLoadStore(Instruction* instr) {
} else {
V::VisitLoadStoreAcquireRelease(instr);
}
+ } else {
+ DecodeAdvSIMDLoadStore(instr);
}
} else {
if ((instr->Bits(31, 30) == 0x3) ||
@@ -516,14 +513,16 @@ void Decoder<V>::DecodeFP(Instruction* instr) {
(instr->Bits(27, 24) == 0xF) );
if (instr->Bit(28) == 0) {
- DecodeNEONVectorDataProcessing(instr);
+ DecodeAdvSIMDDataProcessing(instr);
} else {
- if (instr->Bits(31, 30) == 0x3) {
+ if (instr->Bit(29) == 1) {
V::VisitUnallocated(instr);
- } else if (instr->Bits(31, 30) == 0x1) {
- DecodeNEONScalarDataProcessing(instr);
} else {
- if (instr->Bit(29) == 0) {
+ if (instr->Bits(31, 30) == 0x3) {
+ V::VisitUnallocated(instr);
+ } else if (instr->Bits(31, 30) == 0x1) {
+ DecodeAdvSIMDDataProcessing(instr);
+ } else {
if (instr->Bit(24) == 0) {
if (instr->Bit(21) == 0) {
if ((instr->Bit(23) == 1) ||
@@ -630,190 +629,25 @@ void Decoder<V>::DecodeFP(Instruction* instr) {
V::VisitFPDataProcessing3Source(instr);
}
}
- } else {
- V::VisitUnallocated(instr);
}
}
}
}
-template <typename V>
-void Decoder<V>::DecodeNEONLoadStore(Instruction* instr) {
- DCHECK(instr->Bits(29, 25) == 0x6);
- if (instr->Bit(31) == 0) {
- if ((instr->Bit(24) == 0) && (instr->Bit(21) == 1)) {
- V::VisitUnallocated(instr);
- return;
- }
- if (instr->Bit(23) == 0) {
- if (instr->Bits(20, 16) == 0) {
- if (instr->Bit(24) == 0) {
- V::VisitNEONLoadStoreMultiStruct(instr);
- } else {
- V::VisitNEONLoadStoreSingleStruct(instr);
- }
- } else {
- V::VisitUnallocated(instr);
- }
- } else {
- if (instr->Bit(24) == 0) {
- V::VisitNEONLoadStoreMultiStructPostIndex(instr);
- } else {
- V::VisitNEONLoadStoreSingleStructPostIndex(instr);
- }
- }
- } else {
- V::VisitUnallocated(instr);
- }
+template<typename V>
+void Decoder<V>::DecodeAdvSIMDLoadStore(Instruction* instr) {
+ // TODO(all): Implement Advanced SIMD load/store instruction decode.
+ DCHECK(instr->Bits(29, 25) == 0x6);
+ V::VisitUnimplemented(instr);
}
-template <typename V>
-void Decoder<V>::DecodeNEONVectorDataProcessing(Instruction* instr) {
- DCHECK(instr->Bits(28, 25) == 0x7);
- if (instr->Bit(31) == 0) {
- if (instr->Bit(24) == 0) {
- if (instr->Bit(21) == 0) {
- if (instr->Bit(15) == 0) {
- if (instr->Bit(10) == 0) {
- if (instr->Bit(29) == 0) {
- if (instr->Bit(11) == 0) {
- V::VisitNEONTable(instr);
- } else {
- V::VisitNEONPerm(instr);
- }
- } else {
- V::VisitNEONExtract(instr);
- }
- } else {
- if (instr->Bits(23, 22) == 0) {
- V::VisitNEONCopy(instr);
- } else {
- V::VisitUnallocated(instr);
- }
- }
- } else {
- V::VisitUnallocated(instr);
- }
- } else {
- if (instr->Bit(10) == 0) {
- if (instr->Bit(11) == 0) {
- V::VisitNEON3Different(instr);
- } else {
- if (instr->Bits(18, 17) == 0) {
- if (instr->Bit(20) == 0) {
- if (instr->Bit(19) == 0) {
- V::VisitNEON2RegMisc(instr);
- } else {
- if (instr->Bits(30, 29) == 0x2) {
- V::VisitUnallocated(instr);
- } else {
- V::VisitUnallocated(instr);
- }
- }
- } else {
- if (instr->Bit(19) == 0) {
- V::VisitNEONAcrossLanes(instr);
- } else {
- V::VisitUnallocated(instr);
- }
- }
- } else {
- V::VisitUnallocated(instr);
- }
- }
- } else {
- V::VisitNEON3Same(instr);
- }
- }
- } else {
- if (instr->Bit(10) == 0) {
- V::VisitNEONByIndexedElement(instr);
- } else {
- if (instr->Bit(23) == 0) {
- if (instr->Bits(22, 19) == 0) {
- V::VisitNEONModifiedImmediate(instr);
- } else {
- V::VisitNEONShiftImmediate(instr);
- }
- } else {
- V::VisitUnallocated(instr);
- }
- }
- }
- } else {
- V::VisitUnallocated(instr);
- }
-}
-template <typename V>
-void Decoder<V>::DecodeNEONScalarDataProcessing(Instruction* instr) {
- DCHECK(instr->Bits(28, 25) == 0xF);
- if (instr->Bit(24) == 0) {
- if (instr->Bit(21) == 0) {
- if (instr->Bit(15) == 0) {
- if (instr->Bit(10) == 0) {
- if (instr->Bit(29) == 0) {
- if (instr->Bit(11) == 0) {
- V::VisitUnallocated(instr);
- } else {
- V::VisitUnallocated(instr);
- }
- } else {
- V::VisitUnallocated(instr);
- }
- } else {
- if (instr->Bits(23, 22) == 0) {
- V::VisitNEONScalarCopy(instr);
- } else {
- V::VisitUnallocated(instr);
- }
- }
- } else {
- V::VisitUnallocated(instr);
- }
- } else {
- if (instr->Bit(10) == 0) {
- if (instr->Bit(11) == 0) {
- V::VisitNEONScalar3Diff(instr);
- } else {
- if (instr->Bits(18, 17) == 0) {
- if (instr->Bit(20) == 0) {
- if (instr->Bit(19) == 0) {
- V::VisitNEONScalar2RegMisc(instr);
- } else {
- if (instr->Bit(29) == 0) {
- V::VisitUnallocated(instr);
- } else {
- V::VisitUnallocated(instr);
- }
- }
- } else {
- if (instr->Bit(19) == 0) {
- V::VisitNEONScalarPairwise(instr);
- } else {
- V::VisitUnallocated(instr);
- }
- }
- } else {
- V::VisitUnallocated(instr);
- }
- }
- } else {
- V::VisitNEONScalar3Same(instr);
- }
- }
- } else {
- if (instr->Bit(10) == 0) {
- V::VisitNEONScalarByIndexedElement(instr);
- } else {
- if (instr->Bit(23) == 0) {
- V::VisitNEONScalarShiftImmediate(instr);
- } else {
- V::VisitUnallocated(instr);
- }
- }
- }
+template<typename V>
+void Decoder<V>::DecodeAdvSIMDDataProcessing(Instruction* instr) {
+ // TODO(all): Implement Advanced SIMD data processing instruction decode.
+ DCHECK(instr->Bits(27, 25) == 0x7);
+ V::VisitUnimplemented(instr);
}
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