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diff --git a/js/src/jit/arm64/vixl/Decoder-vixl.cpp b/js/src/jit/arm64/vixl/Decoder-vixl.cpp
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+++ b/js/src/jit/arm64/vixl/Decoder-vixl.cpp
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+// Copyright 2014, ARM Limited
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+// * Redistributions of source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above copyright notice,
+// this list of conditions and the following disclaimer in the documentation
+// and/or other materials provided with the distribution.
+// * Neither the name of ARM Limited nor the names of its contributors may be
+// used to endorse or promote products derived from this software without
+// specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS CONTRIBUTORS "AS IS" AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "jit/arm64/vixl/Decoder-vixl.h"
+
+#include <algorithm>
+
+#include "jit/arm64/vixl/Globals-vixl.h"
+#include "jit/arm64/vixl/Utils-vixl.h"
+
+namespace vixl {
+
+void Decoder::DecodeInstruction(const Instruction *instr) {
+ if (instr->Bits(28, 27) == 0) {
+ VisitUnallocated(instr);
+ } else {
+ switch (instr->Bits(27, 24)) {
+ // 0: PC relative addressing.
+ case 0x0: DecodePCRelAddressing(instr); break;
+
+ // 1: Add/sub immediate.
+ case 0x1: DecodeAddSubImmediate(instr); break;
+
+ // A: Logical shifted register.
+ // Add/sub with carry.
+ // Conditional compare register.
+ // Conditional compare immediate.
+ // Conditional select.
+ // Data processing 1 source.
+ // Data processing 2 source.
+ // B: Add/sub shifted register.
+ // Add/sub extended register.
+ // Data processing 3 source.
+ case 0xA:
+ case 0xB: DecodeDataProcessing(instr); break;
+
+ // 2: Logical immediate.
+ // Move wide immediate.
+ case 0x2: DecodeLogical(instr); break;
+
+ // 3: Bitfield.
+ // Extract.
+ case 0x3: DecodeBitfieldExtract(instr); break;
+
+ // 4: Unconditional branch immediate.
+ // Exception generation.
+ // Compare and branch immediate.
+ // 5: Compare and branch immediate.
+ // Conditional branch.
+ // System.
+ // 6,7: Unconditional branch.
+ // Test and branch immediate.
+ case 0x4:
+ case 0x5:
+ case 0x6:
+ case 0x7: DecodeBranchSystemException(instr); break;
+
+ // 8,9: Load/store register pair post-index.
+ // Load register literal.
+ // Load/store register unscaled immediate.
+ // Load/store register immediate post-index.
+ // Load/store register immediate pre-index.
+ // Load/store register offset.
+ // Load/store exclusive.
+ // C,D: Load/store register pair offset.
+ // Load/store register pair pre-index.
+ // Load/store register unsigned immediate.
+ // Advanced SIMD.
+ case 0x8:
+ case 0x9:
+ case 0xC:
+ case 0xD: DecodeLoadStore(instr); break;
+
+ // E: FP fixed point conversion.
+ // FP integer conversion.
+ // FP data processing 1 source.
+ // FP compare.
+ // FP immediate.
+ // FP data processing 2 source.
+ // FP conditional compare.
+ // FP conditional select.
+ // Advanced SIMD.
+ // F: FP data processing 3 source.
+ // Advanced SIMD.
+ case 0xE:
+ case 0xF: DecodeFP(instr); break;
+ }
+ }
+}
+
+void Decoder::AppendVisitor(DecoderVisitor* new_visitor) {
+ visitors_.append(new_visitor);
+}
+
+
+void Decoder::PrependVisitor(DecoderVisitor* new_visitor) {
+ visitors_.insert(visitors_.begin(), new_visitor);
+}
+
+
+void Decoder::InsertVisitorBefore(DecoderVisitor* new_visitor,
+ DecoderVisitor* registered_visitor) {
+ for (auto it = visitors_.begin(); it != visitors_.end(); it++) {
+ if (*it == registered_visitor) {
+ visitors_.insert(it, new_visitor);
+ return;
+ }
+ }
+ // We reached the end of the list without finding registered_visitor.
+ visitors_.append(new_visitor);
+}
+
+
+void Decoder::InsertVisitorAfter(DecoderVisitor* new_visitor,
+ DecoderVisitor* registered_visitor) {
+ for (auto it = visitors_.begin(); it != visitors_.end(); it++) {
+ if (*it == registered_visitor) {
+ it++;
+ visitors_.insert(it, new_visitor);
+ return;
+ }
+ }
+ // We reached the end of the list without finding registered_visitor.
+ visitors_.append(new_visitor);
+}
+
+
+void Decoder::RemoveVisitor(DecoderVisitor* visitor) {
+ visitors_.erase(std::remove(visitors_.begin(), visitors_.end(), visitor),
+ visitors_.end());
+}
+
+
+void Decoder::DecodePCRelAddressing(const Instruction* instr) {
+ VIXL_ASSERT(instr->Bits(27, 24) == 0x0);
+ // We know bit 28 is set, as <b28:b27> = 0 is filtered out at the top level
+ // decode.
+ VIXL_ASSERT(instr->Bit(28) == 0x1);
+ VisitPCRelAddressing(instr);
+}
+
+
+void Decoder::DecodeBranchSystemException(const Instruction* instr) {
+ VIXL_ASSERT((instr->Bits(27, 24) == 0x4) ||
+ (instr->Bits(27, 24) == 0x5) ||
+ (instr->Bits(27, 24) == 0x6) ||
+ (instr->Bits(27, 24) == 0x7) );
+
+ switch (instr->Bits(31, 29)) {
+ case 0:
+ case 4: {
+ VisitUnconditionalBranch(instr);
+ break;
+ }
+ case 1:
+ case 5: {
+ if (instr->Bit(25) == 0) {
+ VisitCompareBranch(instr);
+ } else {
+ VisitTestBranch(instr);
+ }
+ break;
+ }
+ case 2: {
+ if (instr->Bit(25) == 0) {
+ if ((instr->Bit(24) == 0x1) ||
+ (instr->Mask(0x01000010) == 0x00000010)) {
+ VisitUnallocated(instr);
+ } else {
+ VisitConditionalBranch(instr);
+ }
+ } else {
+ VisitUnallocated(instr);
+ }
+ break;
+ }
+ case 6: {
+ if (instr->Bit(25) == 0) {
+ if (instr->Bit(24) == 0) {
+ if ((instr->Bits(4, 2) != 0) ||
+ (instr->Mask(0x00E0001D) == 0x00200001) ||
+ (instr->Mask(0x00E0001D) == 0x00400001) ||
+ (instr->Mask(0x00E0001E) == 0x00200002) ||
+ (instr->Mask(0x00E0001E) == 0x00400002) ||
+ (instr->Mask(0x00E0001C) == 0x00600000) ||
+ (instr->Mask(0x00E0001C) == 0x00800000) ||
+ (instr->Mask(0x00E0001F) == 0x00A00000) ||
+ (instr->Mask(0x00C0001C) == 0x00C00000)) {
+ VisitUnallocated(instr);
+ } else {
+ VisitException(instr);
+ }
+ } else {
+ if (instr->Bits(23, 22) == 0) {
+ const Instr masked_003FF0E0 = instr->Mask(0x003FF0E0);
+ if ((instr->Bits(21, 19) == 0x4) ||
+ (masked_003FF0E0 == 0x00033000) ||
+ (masked_003FF0E0 == 0x003FF020) ||
+ (masked_003FF0E0 == 0x003FF060) ||
+ (masked_003FF0E0 == 0x003FF0E0) ||
+ (instr->Mask(0x00388000) == 0x00008000) ||
+ (instr->Mask(0x0038E000) == 0x00000000) ||
+ (instr->Mask(0x0039E000) == 0x00002000) ||
+ (instr->Mask(0x003AE000) == 0x00002000) ||
+ (instr->Mask(0x003CE000) == 0x00042000) ||
+ (instr->Mask(0x003FFFC0) == 0x000320C0) ||
+ (instr->Mask(0x003FF100) == 0x00032100) ||
+ (instr->Mask(0x003FF200) == 0x00032200) ||
+ (instr->Mask(0x003FF400) == 0x00032400) ||
+ (instr->Mask(0x003FF800) == 0x00032800) ||
+ (instr->Mask(0x0038F000) == 0x00005000) ||
+ (instr->Mask(0x0038E000) == 0x00006000)) {
+ VisitUnallocated(instr);
+ } else {
+ VisitSystem(instr);
+ }
+ } else {
+ VisitUnallocated(instr);
+ }
+ }
+ } else {
+ if ((instr->Bit(24) == 0x1) ||
+ (instr->Bits(20, 16) != 0x1F) ||
+ (instr->Bits(15, 10) != 0) ||
+ (instr->Bits(4, 0) != 0) ||
+ (instr->Bits(24, 21) == 0x3) ||
+ (instr->Bits(24, 22) == 0x3)) {
+ VisitUnallocated(instr);
+ } else {
+ VisitUnconditionalBranchToRegister(instr);
+ }
+ }
+ break;
+ }
+ case 3:
+ case 7: {
+ VisitUnallocated(instr);
+ break;
+ }
+ }
+}
+
+
+void Decoder::DecodeLoadStore(const Instruction* instr) {
+ VIXL_ASSERT((instr->Bits(27, 24) == 0x8) ||
+ (instr->Bits(27, 24) == 0x9) ||
+ (instr->Bits(27, 24) == 0xC) ||
+ (instr->Bits(27, 24) == 0xD) );
+ // TODO(all): rearrange the tree to integrate this branch.
+ 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) {
+ if (instr->Bit(26) == 0) {
+ VisitLoadStoreExclusive(instr);
+ } else {
+ VIXL_UNREACHABLE();
+ }
+ } else {
+ if ((instr->Bits(31, 30) == 0x3) ||
+ (instr->Mask(0xC4400000) == 0x40000000)) {
+ VisitUnallocated(instr);
+ } else {
+ if (instr->Bit(23) == 0) {
+ if (instr->Mask(0xC4400000) == 0xC0400000) {
+ VisitUnallocated(instr);
+ } else {
+ VisitLoadStorePairNonTemporal(instr);
+ }
+ } else {
+ VisitLoadStorePairPostIndex(instr);
+ }
+ }
+ }
+ } else {
+ if (instr->Bit(29) == 0) {
+ if (instr->Mask(0xC4000000) == 0xC4000000) {
+ VisitUnallocated(instr);
+ } else {
+ VisitLoadLiteral(instr);
+ }
+ } else {
+ if ((instr->Mask(0x84C00000) == 0x80C00000) ||
+ (instr->Mask(0x44800000) == 0x44800000) ||
+ (instr->Mask(0x84800000) == 0x84800000)) {
+ VisitUnallocated(instr);
+ } else {
+ if (instr->Bit(21) == 0) {
+ switch (instr->Bits(11, 10)) {
+ case 0: {
+ VisitLoadStoreUnscaledOffset(instr);
+ break;
+ }
+ case 1: {
+ if (instr->Mask(0xC4C00000) == 0xC0800000) {
+ VisitUnallocated(instr);
+ } else {
+ VisitLoadStorePostIndex(instr);
+ }
+ break;
+ }
+ case 2: {
+ // TODO: VisitLoadStoreRegisterOffsetUnpriv.
+ VisitUnimplemented(instr);
+ break;
+ }
+ case 3: {
+ if (instr->Mask(0xC4C00000) == 0xC0800000) {
+ VisitUnallocated(instr);
+ } else {
+ VisitLoadStorePreIndex(instr);
+ }
+ break;
+ }
+ }
+ } else {
+ if (instr->Bits(11, 10) == 0x2) {
+ if (instr->Bit(14) == 0) {
+ VisitUnallocated(instr);
+ } else {
+ VisitLoadStoreRegisterOffset(instr);
+ }
+ } else {
+ VisitUnallocated(instr);
+ }
+ }
+ }
+ }
+ }
+ } else {
+ if (instr->Bit(28) == 0) {
+ if (instr->Bit(29) == 0) {
+ VisitUnallocated(instr);
+ } else {
+ if ((instr->Bits(31, 30) == 0x3) ||
+ (instr->Mask(0xC4400000) == 0x40000000)) {
+ VisitUnallocated(instr);
+ } else {
+ if (instr->Bit(23) == 0) {
+ VisitLoadStorePairOffset(instr);
+ } else {
+ VisitLoadStorePairPreIndex(instr);
+ }
+ }
+ }
+ } else {
+ if (instr->Bit(29) == 0) {
+ VisitUnallocated(instr);
+ } else {
+ if ((instr->Mask(0x84C00000) == 0x80C00000) ||
+ (instr->Mask(0x44800000) == 0x44800000) ||
+ (instr->Mask(0x84800000) == 0x84800000)) {
+ VisitUnallocated(instr);
+ } else {
+ VisitLoadStoreUnsignedOffset(instr);
+ }
+ }
+ }
+ }
+}
+
+
+void Decoder::DecodeLogical(const Instruction* instr) {
+ VIXL_ASSERT(instr->Bits(27, 24) == 0x2);
+
+ if (instr->Mask(0x80400000) == 0x00400000) {
+ VisitUnallocated(instr);
+ } else {
+ if (instr->Bit(23) == 0) {
+ VisitLogicalImmediate(instr);
+ } else {
+ if (instr->Bits(30, 29) == 0x1) {
+ VisitUnallocated(instr);
+ } else {
+ VisitMoveWideImmediate(instr);
+ }
+ }
+ }
+}
+
+
+void Decoder::DecodeBitfieldExtract(const Instruction* instr) {
+ VIXL_ASSERT(instr->Bits(27, 24) == 0x3);
+
+ if ((instr->Mask(0x80400000) == 0x80000000) ||
+ (instr->Mask(0x80400000) == 0x00400000) ||
+ (instr->Mask(0x80008000) == 0x00008000)) {
+ VisitUnallocated(instr);
+ } else if (instr->Bit(23) == 0) {
+ if ((instr->Mask(0x80200000) == 0x00200000) ||
+ (instr->Mask(0x60000000) == 0x60000000)) {
+ VisitUnallocated(instr);
+ } else {
+ VisitBitfield(instr);
+ }
+ } else {
+ if ((instr->Mask(0x60200000) == 0x00200000) ||
+ (instr->Mask(0x60000000) != 0x00000000)) {
+ VisitUnallocated(instr);
+ } else {
+ VisitExtract(instr);
+ }
+ }
+}
+
+
+void Decoder::DecodeAddSubImmediate(const Instruction* instr) {
+ VIXL_ASSERT(instr->Bits(27, 24) == 0x1);
+ if (instr->Bit(23) == 1) {
+ VisitUnallocated(instr);
+ } else {
+ VisitAddSubImmediate(instr);
+ }
+}
+
+
+void Decoder::DecodeDataProcessing(const Instruction* instr) {
+ VIXL_ASSERT((instr->Bits(27, 24) == 0xA) ||
+ (instr->Bits(27, 24) == 0xB));
+
+ if (instr->Bit(24) == 0) {
+ if (instr->Bit(28) == 0) {
+ if (instr->Mask(0x80008000) == 0x00008000) {
+ VisitUnallocated(instr);
+ } else {
+ VisitLogicalShifted(instr);
+ }
+ } else {
+ switch (instr->Bits(23, 21)) {
+ case 0: {
+ if (instr->Mask(0x0000FC00) != 0) {
+ VisitUnallocated(instr);
+ } else {
+ VisitAddSubWithCarry(instr);
+ }
+ break;
+ }
+ case 2: {
+ if ((instr->Bit(29) == 0) ||
+ (instr->Mask(0x00000410) != 0)) {
+ VisitUnallocated(instr);
+ } else {
+ if (instr->Bit(11) == 0) {
+ VisitConditionalCompareRegister(instr);
+ } else {
+ VisitConditionalCompareImmediate(instr);
+ }
+ }
+ break;
+ }
+ case 4: {
+ if (instr->Mask(0x20000800) != 0x00000000) {
+ VisitUnallocated(instr);
+ } else {
+ VisitConditionalSelect(instr);
+ }
+ break;
+ }
+ case 6: {
+ if (instr->Bit(29) == 0x1) {
+ VisitUnallocated(instr);
+ VIXL_FALLTHROUGH();
+ } else {
+ if (instr->Bit(30) == 0) {
+ if ((instr->Bit(15) == 0x1) ||
+ (instr->Bits(15, 11) == 0) ||
+ (instr->Bits(15, 12) == 0x1) ||
+ (instr->Bits(15, 12) == 0x3) ||
+ (instr->Bits(15, 13) == 0x3) ||
+ (instr->Mask(0x8000EC00) == 0x00004C00) ||
+ (instr->Mask(0x8000E800) == 0x80004000) ||
+ (instr->Mask(0x8000E400) == 0x80004000)) {
+ VisitUnallocated(instr);
+ } else {
+ VisitDataProcessing2Source(instr);
+ }
+ } else {
+ if ((instr->Bit(13) == 1) ||
+ (instr->Bits(20, 16) != 0) ||
+ (instr->Bits(15, 14) != 0) ||
+ (instr->Mask(0xA01FFC00) == 0x00000C00) ||
+ (instr->Mask(0x201FF800) == 0x00001800)) {
+ VisitUnallocated(instr);
+ } else {
+ VisitDataProcessing1Source(instr);
+ }
+ }
+ break;
+ }
+ }
+ case 1:
+ case 3:
+ case 5:
+ case 7: VisitUnallocated(instr); break;
+ }
+ }
+ } else {
+ if (instr->Bit(28) == 0) {
+ if (instr->Bit(21) == 0) {
+ if ((instr->Bits(23, 22) == 0x3) ||
+ (instr->Mask(0x80008000) == 0x00008000)) {
+ VisitUnallocated(instr);
+ } else {
+ VisitAddSubShifted(instr);
+ }
+ } else {
+ if ((instr->Mask(0x00C00000) != 0x00000000) ||
+ (instr->Mask(0x00001400) == 0x00001400) ||
+ (instr->Mask(0x00001800) == 0x00001800)) {
+ VisitUnallocated(instr);
+ } else {
+ VisitAddSubExtended(instr);
+ }
+ }
+ } else {
+ if ((instr->Bit(30) == 0x1) ||
+ (instr->Bits(30, 29) == 0x1) ||
+ (instr->Mask(0xE0600000) == 0x00200000) ||
+ (instr->Mask(0xE0608000) == 0x00400000) ||
+ (instr->Mask(0x60608000) == 0x00408000) ||
+ (instr->Mask(0x60E00000) == 0x00E00000) ||
+ (instr->Mask(0x60E00000) == 0x00800000) ||
+ (instr->Mask(0x60E00000) == 0x00600000)) {
+ VisitUnallocated(instr);
+ } else {
+ VisitDataProcessing3Source(instr);
+ }
+ }
+ }
+}
+
+
+void Decoder::DecodeFP(const Instruction* instr) {
+ VIXL_ASSERT((instr->Bits(27, 24) == 0xE) ||
+ (instr->Bits(27, 24) == 0xF));
+ if (instr->Bit(28) == 0) {
+ DecodeNEONVectorDataProcessing(instr);
+ } else {
+ if (instr->Bits(31, 30) == 0x3) {
+ VisitUnallocated(instr);
+ } else if (instr->Bits(31, 30) == 0x1) {
+ DecodeNEONScalarDataProcessing(instr);
+ } else {
+ if (instr->Bit(29) == 0) {
+ if (instr->Bit(24) == 0) {
+ if (instr->Bit(21) == 0) {
+ if ((instr->Bit(23) == 1) ||
+ (instr->Bit(18) == 1) ||
+ (instr->Mask(0x80008000) == 0x00000000) ||
+ (instr->Mask(0x000E0000) == 0x00000000) ||
+ (instr->Mask(0x000E0000) == 0x000A0000) ||
+ (instr->Mask(0x00160000) == 0x00000000) ||
+ (instr->Mask(0x00160000) == 0x00120000)) {
+ VisitUnallocated(instr);
+ } else {
+ VisitFPFixedPointConvert(instr);
+ }
+ } else {
+ if (instr->Bits(15, 10) == 32) {
+ VisitUnallocated(instr);
+ } else if (instr->Bits(15, 10) == 0) {
+ if ((instr->Bits(23, 22) == 0x3) ||
+ (instr->Mask(0x000E0000) == 0x000A0000) ||
+ (instr->Mask(0x000E0000) == 0x000C0000) ||
+ (instr->Mask(0x00160000) == 0x00120000) ||
+ (instr->Mask(0x00160000) == 0x00140000) ||
+ (instr->Mask(0x20C40000) == 0x00800000) ||
+ (instr->Mask(0x20C60000) == 0x00840000) ||
+ (instr->Mask(0xA0C60000) == 0x80060000) ||
+ (instr->Mask(0xA0C60000) == 0x00860000) ||
+ (instr->Mask(0xA0C60000) == 0x00460000) ||
+ (instr->Mask(0xA0CE0000) == 0x80860000) ||
+ (instr->Mask(0xA0CE0000) == 0x804E0000) ||
+ (instr->Mask(0xA0CE0000) == 0x000E0000) ||
+ (instr->Mask(0xA0D60000) == 0x00160000) ||
+ (instr->Mask(0xA0D60000) == 0x80560000) ||
+ (instr->Mask(0xA0D60000) == 0x80960000)) {
+ VisitUnallocated(instr);
+ } else {
+ VisitFPIntegerConvert(instr);
+ }
+ } else if (instr->Bits(14, 10) == 16) {
+ const Instr masked_A0DF8000 = instr->Mask(0xA0DF8000);
+ if ((instr->Mask(0x80180000) != 0) ||
+ (masked_A0DF8000 == 0x00020000) ||
+ (masked_A0DF8000 == 0x00030000) ||
+ (masked_A0DF8000 == 0x00068000) ||
+ (masked_A0DF8000 == 0x00428000) ||
+ (masked_A0DF8000 == 0x00430000) ||
+ (masked_A0DF8000 == 0x00468000) ||
+ (instr->Mask(0xA0D80000) == 0x00800000) ||
+ (instr->Mask(0xA0DE0000) == 0x00C00000) ||
+ (instr->Mask(0xA0DF0000) == 0x00C30000) ||
+ (instr->Mask(0xA0DC0000) == 0x00C40000)) {
+ VisitUnallocated(instr);
+ } else {
+ VisitFPDataProcessing1Source(instr);
+ }
+ } else if (instr->Bits(13, 10) == 8) {
+ if ((instr->Bits(15, 14) != 0) ||
+ (instr->Bits(2, 0) != 0) ||
+ (instr->Mask(0x80800000) != 0x00000000)) {
+ VisitUnallocated(instr);
+ } else {
+ VisitFPCompare(instr);
+ }
+ } else if (instr->Bits(12, 10) == 4) {
+ if ((instr->Bits(9, 5) != 0) ||
+ (instr->Mask(0x80800000) != 0x00000000)) {
+ VisitUnallocated(instr);
+ } else {
+ VisitFPImmediate(instr);
+ }
+ } else {
+ if (instr->Mask(0x80800000) != 0x00000000) {
+ VisitUnallocated(instr);
+ } else {
+ switch (instr->Bits(11, 10)) {
+ case 1: {
+ VisitFPConditionalCompare(instr);
+ break;
+ }
+ case 2: {
+ if ((instr->Bits(15, 14) == 0x3) ||
+ (instr->Mask(0x00009000) == 0x00009000) ||
+ (instr->Mask(0x0000A000) == 0x0000A000)) {
+ VisitUnallocated(instr);
+ } else {
+ VisitFPDataProcessing2Source(instr);
+ }
+ break;
+ }
+ case 3: {
+ VisitFPConditionalSelect(instr);
+ break;
+ }
+ default: VIXL_UNREACHABLE();
+ }
+ }
+ }
+ }
+ } else {
+ // Bit 30 == 1 has been handled earlier.
+ VIXL_ASSERT(instr->Bit(30) == 0);
+ if (instr->Mask(0xA0800000) != 0) {
+ VisitUnallocated(instr);
+ } else {
+ VisitFPDataProcessing3Source(instr);
+ }
+ }
+ } else {
+ VisitUnallocated(instr);
+ }
+ }
+ }
+}
+
+
+void Decoder::DecodeNEONLoadStore(const Instruction* instr) {
+ VIXL_ASSERT(instr->Bits(29, 25) == 0x6);
+ if (instr->Bit(31) == 0) {
+ if ((instr->Bit(24) == 0) && (instr->Bit(21) == 1)) {
+ VisitUnallocated(instr);
+ return;
+ }
+
+ if (instr->Bit(23) == 0) {
+ if (instr->Bits(20, 16) == 0) {
+ if (instr->Bit(24) == 0) {
+ VisitNEONLoadStoreMultiStruct(instr);
+ } else {
+ VisitNEONLoadStoreSingleStruct(instr);
+ }
+ } else {
+ VisitUnallocated(instr);
+ }
+ } else {
+ if (instr->Bit(24) == 0) {
+ VisitNEONLoadStoreMultiStructPostIndex(instr);
+ } else {
+ VisitNEONLoadStoreSingleStructPostIndex(instr);
+ }
+ }
+ } else {
+ VisitUnallocated(instr);
+ }
+}
+
+
+void Decoder::DecodeNEONVectorDataProcessing(const Instruction* instr) {
+ VIXL_ASSERT(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) {
+ VisitNEONTable(instr);
+ } else {
+ VisitNEONPerm(instr);
+ }
+ } else {
+ VisitNEONExtract(instr);
+ }
+ } else {
+ if (instr->Bits(23, 22) == 0) {
+ VisitNEONCopy(instr);
+ } else {
+ VisitUnallocated(instr);
+ }
+ }
+ } else {
+ VisitUnallocated(instr);
+ }
+ } else {
+ if (instr->Bit(10) == 0) {
+ if (instr->Bit(11) == 0) {
+ VisitNEON3Different(instr);
+ } else {
+ if (instr->Bits(18, 17) == 0) {
+ if (instr->Bit(20) == 0) {
+ if (instr->Bit(19) == 0) {
+ VisitNEON2RegMisc(instr);
+ } else {
+ if (instr->Bits(30, 29) == 0x2) {
+ VisitCryptoAES(instr);
+ } else {
+ VisitUnallocated(instr);
+ }
+ }
+ } else {
+ if (instr->Bit(19) == 0) {
+ VisitNEONAcrossLanes(instr);
+ } else {
+ VisitUnallocated(instr);
+ }
+ }
+ } else {
+ VisitUnallocated(instr);
+ }
+ }
+ } else {
+ VisitNEON3Same(instr);
+ }
+ }
+ } else {
+ if (instr->Bit(10) == 0) {
+ VisitNEONByIndexedElement(instr);
+ } else {
+ if (instr->Bit(23) == 0) {
+ if (instr->Bits(22, 19) == 0) {
+ VisitNEONModifiedImmediate(instr);
+ } else {
+ VisitNEONShiftImmediate(instr);
+ }
+ } else {
+ VisitUnallocated(instr);
+ }
+ }
+ }
+ } else {
+ VisitUnallocated(instr);
+ }
+}
+
+
+void Decoder::DecodeNEONScalarDataProcessing(const Instruction* instr) {
+ VIXL_ASSERT(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) {
+ VisitCrypto3RegSHA(instr);
+ } else {
+ VisitUnallocated(instr);
+ }
+ } else {
+ VisitUnallocated(instr);
+ }
+ } else {
+ if (instr->Bits(23, 22) == 0) {
+ VisitNEONScalarCopy(instr);
+ } else {
+ VisitUnallocated(instr);
+ }
+ }
+ } else {
+ VisitUnallocated(instr);
+ }
+ } else {
+ if (instr->Bit(10) == 0) {
+ if (instr->Bit(11) == 0) {
+ VisitNEONScalar3Diff(instr);
+ } else {
+ if (instr->Bits(18, 17) == 0) {
+ if (instr->Bit(20) == 0) {
+ if (instr->Bit(19) == 0) {
+ VisitNEONScalar2RegMisc(instr);
+ } else {
+ if (instr->Bit(29) == 0) {
+ VisitCrypto2RegSHA(instr);
+ } else {
+ VisitUnallocated(instr);
+ }
+ }
+ } else {
+ if (instr->Bit(19) == 0) {
+ VisitNEONScalarPairwise(instr);
+ } else {
+ VisitUnallocated(instr);
+ }
+ }
+ } else {
+ VisitUnallocated(instr);
+ }
+ }
+ } else {
+ VisitNEONScalar3Same(instr);
+ }
+ }
+ } else {
+ if (instr->Bit(10) == 0) {
+ VisitNEONScalarByIndexedElement(instr);
+ } else {
+ if (instr->Bit(23) == 0) {
+ VisitNEONScalarShiftImmediate(instr);
+ } else {
+ VisitUnallocated(instr);
+ }
+ }
+ }
+}
+
+
+#define DEFINE_VISITOR_CALLERS(A) \
+ void Decoder::Visit##A(const Instruction *instr) { \
+ VIXL_ASSERT(instr->Mask(A##FMask) == A##Fixed); \
+ for (auto visitor : visitors_) { \
+ visitor->Visit##A(instr); \
+ } \
+ }
+VISITOR_LIST(DEFINE_VISITOR_CALLERS)
+#undef DEFINE_VISITOR_CALLERS
+} // namespace vixl
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-29 12:35:49 +0000