summaryrefslogtreecommitdiffstats
path: root/qemu/disas/libvixl/vixl/a64/decoder-a64.cc
diff options
context:
space:
mode:
Diffstat (limited to 'qemu/disas/libvixl/vixl/a64/decoder-a64.cc')
-rw-r--r--qemu/disas/libvixl/vixl/a64/decoder-a64.cc877
1 files changed, 0 insertions, 877 deletions
diff --git a/qemu/disas/libvixl/vixl/a64/decoder-a64.cc b/qemu/disas/libvixl/vixl/a64/decoder-a64.cc
deleted file mode 100644
index 5ba2d3ce0..000000000
--- a/qemu/disas/libvixl/vixl/a64/decoder-a64.cc
+++ /dev/null
@@ -1,877 +0,0 @@
-// 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 "vixl/globals.h"
-#include "vixl/utils.h"
-#include "vixl/a64/decoder-a64.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_.push_back(new_visitor);
-}
-
-
-void Decoder::PrependVisitor(DecoderVisitor* new_visitor) {
- visitors_.push_front(new_visitor);
-}
-
-
-void Decoder::InsertVisitorBefore(DecoderVisitor* new_visitor,
- DecoderVisitor* registered_visitor) {
- std::list<DecoderVisitor*>::iterator it;
- for (it = visitors_.begin(); it != visitors_.end(); it++) {
- if (*it == registered_visitor) {
- visitors_.insert(it, new_visitor);
- return;
- }
- }
- // We reached the end of the list. The last element must be
- // registered_visitor.
- VIXL_ASSERT(*it == registered_visitor);
- visitors_.insert(it, new_visitor);
-}
-
-
-void Decoder::InsertVisitorAfter(DecoderVisitor* new_visitor,
- DecoderVisitor* registered_visitor) {
- std::list<DecoderVisitor*>::iterator it;
- for (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. The last element must be
- // registered_visitor.
- VIXL_ASSERT(*it == registered_visitor);
- visitors_.push_back(new_visitor);
-}
-
-
-void Decoder::RemoveVisitor(DecoderVisitor* visitor) {
- visitors_.remove(visitor);
-}
-
-
-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); \
- std::list<DecoderVisitor*>::iterator it; \
- for (it = visitors_.begin(); it != visitors_.end(); it++) { \
- (*it)->Visit##A(instr); \
- } \
- }
-VISITOR_LIST(DEFINE_VISITOR_CALLERS)
-#undef DEFINE_VISITOR_CALLERS
-} // namespace vixl