diff options
Diffstat (limited to 'disas/libvixl/a64/instructions-a64.h')
| -rw-r--r-- | disas/libvixl/a64/instructions-a64.h | 384 |
1 files changed, 0 insertions, 384 deletions
diff --git a/disas/libvixl/a64/instructions-a64.h b/disas/libvixl/a64/instructions-a64.h deleted file mode 100644 index f1d883ccc7..0000000000 --- a/disas/libvixl/a64/instructions-a64.h +++ /dev/null @@ -1,384 +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. - -#ifndef VIXL_A64_INSTRUCTIONS_A64_H_ -#define VIXL_A64_INSTRUCTIONS_A64_H_ - -#include "globals.h" -#include "utils.h" -#include "a64/constants-a64.h" - -namespace vixl { -// ISA constants. -------------------------------------------------------------- - -typedef uint32_t Instr; -const unsigned kInstructionSize = 4; -const unsigned kInstructionSizeLog2 = 2; -const unsigned kLiteralEntrySize = 4; -const unsigned kLiteralEntrySizeLog2 = 2; -const unsigned kMaxLoadLiteralRange = 1 * MBytes; - -// This is the nominal page size (as used by the adrp instruction); the actual -// size of the memory pages allocated by the kernel is likely to differ. -const unsigned kPageSize = 4 * KBytes; -const unsigned kPageSizeLog2 = 12; - -const unsigned kWRegSize = 32; -const unsigned kWRegSizeLog2 = 5; -const unsigned kWRegSizeInBytes = kWRegSize / 8; -const unsigned kWRegSizeInBytesLog2 = kWRegSizeLog2 - 3; -const unsigned kXRegSize = 64; -const unsigned kXRegSizeLog2 = 6; -const unsigned kXRegSizeInBytes = kXRegSize / 8; -const unsigned kXRegSizeInBytesLog2 = kXRegSizeLog2 - 3; -const unsigned kSRegSize = 32; -const unsigned kSRegSizeLog2 = 5; -const unsigned kSRegSizeInBytes = kSRegSize / 8; -const unsigned kSRegSizeInBytesLog2 = kSRegSizeLog2 - 3; -const unsigned kDRegSize = 64; -const unsigned kDRegSizeLog2 = 6; -const unsigned kDRegSizeInBytes = kDRegSize / 8; -const unsigned kDRegSizeInBytesLog2 = kDRegSizeLog2 - 3; -const uint64_t kWRegMask = UINT64_C(0xffffffff); -const uint64_t kXRegMask = UINT64_C(0xffffffffffffffff); -const uint64_t kSRegMask = UINT64_C(0xffffffff); -const uint64_t kDRegMask = UINT64_C(0xffffffffffffffff); -const uint64_t kSSignMask = UINT64_C(0x80000000); -const uint64_t kDSignMask = UINT64_C(0x8000000000000000); -const uint64_t kWSignMask = UINT64_C(0x80000000); -const uint64_t kXSignMask = UINT64_C(0x8000000000000000); -const uint64_t kByteMask = UINT64_C(0xff); -const uint64_t kHalfWordMask = UINT64_C(0xffff); -const uint64_t kWordMask = UINT64_C(0xffffffff); -const uint64_t kXMaxUInt = UINT64_C(0xffffffffffffffff); -const uint64_t kWMaxUInt = UINT64_C(0xffffffff); -const int64_t kXMaxInt = INT64_C(0x7fffffffffffffff); -const int64_t kXMinInt = INT64_C(0x8000000000000000); -const int32_t kWMaxInt = INT32_C(0x7fffffff); -const int32_t kWMinInt = INT32_C(0x80000000); -const unsigned kLinkRegCode = 30; -const unsigned kZeroRegCode = 31; -const unsigned kSPRegInternalCode = 63; -const unsigned kRegCodeMask = 0x1f; - -const unsigned kAddressTagOffset = 56; -const unsigned kAddressTagWidth = 8; -const uint64_t kAddressTagMask = - ((UINT64_C(1) << kAddressTagWidth) - 1) << kAddressTagOffset; -VIXL_STATIC_ASSERT(kAddressTagMask == UINT64_C(0xff00000000000000)); - -// AArch64 floating-point specifics. These match IEEE-754. -const unsigned kDoubleMantissaBits = 52; -const unsigned kDoubleExponentBits = 11; -const unsigned kFloatMantissaBits = 23; -const unsigned kFloatExponentBits = 8; - -// Floating-point infinity values. -extern const float kFP32PositiveInfinity; -extern const float kFP32NegativeInfinity; -extern const double kFP64PositiveInfinity; -extern const double kFP64NegativeInfinity; - -// The default NaN values (for FPCR.DN=1). -extern const double kFP64DefaultNaN; -extern const float kFP32DefaultNaN; - - -enum LSDataSize { - LSByte = 0, - LSHalfword = 1, - LSWord = 2, - LSDoubleWord = 3 -}; - -LSDataSize CalcLSPairDataSize(LoadStorePairOp op); - -enum ImmBranchType { - UnknownBranchType = 0, - CondBranchType = 1, - UncondBranchType = 2, - CompareBranchType = 3, - TestBranchType = 4 -}; - -enum AddrMode { - Offset, - PreIndex, - PostIndex -}; - -enum FPRounding { - // The first four values are encodable directly by FPCR<RMode>. - FPTieEven = 0x0, - FPPositiveInfinity = 0x1, - FPNegativeInfinity = 0x2, - FPZero = 0x3, - - // The final rounding mode is only available when explicitly specified by the - // instruction (such as with fcvta). It cannot be set in FPCR. - FPTieAway -}; - -enum Reg31Mode { - Reg31IsStackPointer, - Reg31IsZeroRegister -}; - -// Instructions. --------------------------------------------------------------- - -class Instruction { - public: - Instr InstructionBits() const { - return *(reinterpret_cast<const Instr*>(this)); - } - - void SetInstructionBits(Instr new_instr) { - *(reinterpret_cast<Instr*>(this)) = new_instr; - } - - int Bit(int pos) const { - return (InstructionBits() >> pos) & 1; - } - - uint32_t Bits(int msb, int lsb) const { - return unsigned_bitextract_32(msb, lsb, InstructionBits()); - } - - int32_t SignedBits(int msb, int lsb) const { - int32_t bits = *(reinterpret_cast<const int32_t*>(this)); - return signed_bitextract_32(msb, lsb, bits); - } - - Instr Mask(uint32_t mask) const { - return InstructionBits() & mask; - } - - #define DEFINE_GETTER(Name, HighBit, LowBit, Func) \ - int64_t Name() const { return Func(HighBit, LowBit); } - INSTRUCTION_FIELDS_LIST(DEFINE_GETTER) - #undef DEFINE_GETTER - - // ImmPCRel is a compound field (not present in INSTRUCTION_FIELDS_LIST), - // formed from ImmPCRelLo and ImmPCRelHi. - int ImmPCRel() const { - int const offset = ((ImmPCRelHi() << ImmPCRelLo_width) | ImmPCRelLo()); - int const width = ImmPCRelLo_width + ImmPCRelHi_width; - return signed_bitextract_32(width-1, 0, offset); - } - - uint64_t ImmLogical() const; - float ImmFP32() const; - double ImmFP64() const; - - LSDataSize SizeLSPair() const { - return CalcLSPairDataSize( - static_cast<LoadStorePairOp>(Mask(LoadStorePairMask))); - } - - // Helpers. - bool IsCondBranchImm() const { - return Mask(ConditionalBranchFMask) == ConditionalBranchFixed; - } - - bool IsUncondBranchImm() const { - return Mask(UnconditionalBranchFMask) == UnconditionalBranchFixed; - } - - bool IsCompareBranch() const { - return Mask(CompareBranchFMask) == CompareBranchFixed; - } - - bool IsTestBranch() const { - return Mask(TestBranchFMask) == TestBranchFixed; - } - - bool IsPCRelAddressing() const { - return Mask(PCRelAddressingFMask) == PCRelAddressingFixed; - } - - bool IsLogicalImmediate() const { - return Mask(LogicalImmediateFMask) == LogicalImmediateFixed; - } - - bool IsAddSubImmediate() const { - return Mask(AddSubImmediateFMask) == AddSubImmediateFixed; - } - - bool IsAddSubExtended() const { - return Mask(AddSubExtendedFMask) == AddSubExtendedFixed; - } - - bool IsLoadOrStore() const { - return Mask(LoadStoreAnyFMask) == LoadStoreAnyFixed; - } - - bool IsLoad() const; - bool IsStore() const; - - bool IsLoadLiteral() const { - // This includes PRFM_lit. - return Mask(LoadLiteralFMask) == LoadLiteralFixed; - } - - bool IsMovn() const { - return (Mask(MoveWideImmediateMask) == MOVN_x) || - (Mask(MoveWideImmediateMask) == MOVN_w); - } - - // Indicate whether Rd can be the stack pointer or the zero register. This - // does not check that the instruction actually has an Rd field. - Reg31Mode RdMode() const { - // The following instructions use sp or wsp as Rd: - // Add/sub (immediate) when not setting the flags. - // Add/sub (extended) when not setting the flags. - // Logical (immediate) when not setting the flags. - // Otherwise, r31 is the zero register. - if (IsAddSubImmediate() || IsAddSubExtended()) { - if (Mask(AddSubSetFlagsBit)) { - return Reg31IsZeroRegister; - } else { - return Reg31IsStackPointer; - } - } - if (IsLogicalImmediate()) { - // Of the logical (immediate) instructions, only ANDS (and its aliases) - // can set the flags. The others can all write into sp. - // Note that some logical operations are not available to - // immediate-operand instructions, so we have to combine two masks here. - if (Mask(LogicalImmediateMask & LogicalOpMask) == ANDS) { - return Reg31IsZeroRegister; - } else { - return Reg31IsStackPointer; - } - } - return Reg31IsZeroRegister; - } - - // Indicate whether Rn can be the stack pointer or the zero register. This - // does not check that the instruction actually has an Rn field. - Reg31Mode RnMode() const { - // The following instructions use sp or wsp as Rn: - // All loads and stores. - // Add/sub (immediate). - // Add/sub (extended). - // Otherwise, r31 is the zero register. - if (IsLoadOrStore() || IsAddSubImmediate() || IsAddSubExtended()) { - return Reg31IsStackPointer; - } - return Reg31IsZeroRegister; - } - - ImmBranchType BranchType() const { - if (IsCondBranchImm()) { - return CondBranchType; - } else if (IsUncondBranchImm()) { - return UncondBranchType; - } else if (IsCompareBranch()) { - return CompareBranchType; - } else if (IsTestBranch()) { - return TestBranchType; - } else { - return UnknownBranchType; - } - } - - // Find the target of this instruction. 'this' may be a branch or a - // PC-relative addressing instruction. - const Instruction* ImmPCOffsetTarget() const; - - // Patch a PC-relative offset to refer to 'target'. 'this' may be a branch or - // a PC-relative addressing instruction. - void SetImmPCOffsetTarget(const Instruction* target); - // Patch a literal load instruction to load from 'source'. - void SetImmLLiteral(const Instruction* source); - - // Calculate the address of a literal referred to by a load-literal - // instruction, and return it as the specified type. - // - // The literal itself is safely mutable only if the backing buffer is safely - // mutable. - template <typename T> - T LiteralAddress() const { - uint64_t base_raw = reinterpret_cast<uintptr_t>(this); - ptrdiff_t offset = ImmLLiteral() << kLiteralEntrySizeLog2; - uint64_t address_raw = base_raw + offset; - - // Cast the address using a C-style cast. A reinterpret_cast would be - // appropriate, but it can't cast one integral type to another. - T address = (T)(address_raw); - - // Assert that the address can be represented by the specified type. - VIXL_ASSERT((uint64_t)(address) == address_raw); - - return address; - } - - uint32_t Literal32() const { - uint32_t literal; - memcpy(&literal, LiteralAddress<const void*>(), sizeof(literal)); - return literal; - } - - uint64_t Literal64() const { - uint64_t literal; - memcpy(&literal, LiteralAddress<const void*>(), sizeof(literal)); - return literal; - } - - float LiteralFP32() const { - return rawbits_to_float(Literal32()); - } - - double LiteralFP64() const { - return rawbits_to_double(Literal64()); - } - - const Instruction* NextInstruction() const { - return this + kInstructionSize; - } - - const Instruction* InstructionAtOffset(int64_t offset) const { - VIXL_ASSERT(IsWordAligned(this + offset)); - return this + offset; - } - - template<typename T> static Instruction* Cast(T src) { - return reinterpret_cast<Instruction*>(src); - } - - template<typename T> static const Instruction* CastConst(T src) { - return reinterpret_cast<const Instruction*>(src); - } - - private: - int ImmBranch() const; - - void SetPCRelImmTarget(const Instruction* target); - void SetBranchImmTarget(const Instruction* target); -}; -} // namespace vixl - -#endif // VIXL_A64_INSTRUCTIONS_A64_H_ |