diff options
author | Don Dugger <n0ano@n0ano.com> | 2016-06-03 03:33:22 +0000 |
---|---|---|
committer | Gerrit Code Review <gerrit@172.30.200.206> | 2016-06-03 03:33:23 +0000 |
commit | da27230f80795d0028333713f036d44c53cb0e68 (patch) | |
tree | b3d379eaf000adf72b36cb01cdf4d79c3e3f064c /qemu/disas/libvixl/a64/decoder-a64.cc | |
parent | 0e68cb048bb8aadb14675f5d4286d8ab2fc35449 (diff) | |
parent | 437fd90c0250dee670290f9b714253671a990160 (diff) |
Merge "These changes are the raw update to qemu-2.6."
Diffstat (limited to 'qemu/disas/libvixl/a64/decoder-a64.cc')
-rw-r--r-- | qemu/disas/libvixl/a64/decoder-a64.cc | 707 |
1 files changed, 0 insertions, 707 deletions
diff --git a/qemu/disas/libvixl/a64/decoder-a64.cc b/qemu/disas/libvixl/a64/decoder-a64.cc deleted file mode 100644 index 82591ca30..000000000 --- a/qemu/disas/libvixl/a64/decoder-a64.cc +++ /dev/null @@ -1,707 +0,0 @@ -// Copyright 2013, 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 "globals.h" -#include "utils.h" -#include "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) ); - - if (instr->Bit(24) == 0) { - if (instr->Bit(28) == 0) { - if (instr->Bit(29) == 0) { - if (instr->Bit(26) == 0) { - VisitLoadStoreExclusive(instr); - } else { - DecodeAdvSIMDLoadStore(instr); - } - } 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); - } 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) { - DecodeAdvSIMDDataProcessing(instr); - } else { - if (instr->Bit(29) == 1) { - VisitUnallocated(instr); - } else { - if (instr->Bits(31, 30) == 0x3) { - 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) || - (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); - } - } - } - } - } -} - - -void Decoder::DecodeAdvSIMDLoadStore(const Instruction* instr) { - // TODO: Implement Advanced SIMD load/store instruction decode. - VIXL_ASSERT(instr->Bits(29, 25) == 0x6); - VisitUnimplemented(instr); -} - - -void Decoder::DecodeAdvSIMDDataProcessing(const Instruction* instr) { - // TODO: Implement Advanced SIMD data processing instruction decode. - VIXL_ASSERT(instr->Bits(27, 25) == 0x7); - VisitUnimplemented(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 |