diff options
Diffstat (limited to 'src/armv8')
| -rw-r--r-- | src/armv8/a64.rs | 1201 |
1 files changed, 916 insertions, 285 deletions
diff --git a/src/armv8/a64.rs b/src/armv8/a64.rs index 3aaca8e..16709c2 100644 --- a/src/armv8/a64.rs +++ b/src/armv8/a64.rs @@ -281,6 +281,13 @@ impl Display for Instruction { return write!(fmt, "isb"); } } + Opcode::SBC => { + if let Operand::Register(_, 31) = self.operands[1] { + return write!(fmt, "ngc {}, {}", self.operands[0], self.operands[2]); + } else { + write!(fmt, "sbc")?; + } + } Opcode::MOVN => { let imm = if let Operand::ImmShift(imm, shift) = self.operands[1] { !((imm as u64) << shift) @@ -319,8 +326,10 @@ impl Display for Instruction { if let Operand::Register(_, 31) = self.operands[1] { if let Operand::Immediate(0) = self.operands[2] { return write!(fmt, "mov {}, {}", self.operands[0], self.operands[1]); - } else if let Operand::RegShift(ShiftStyle::LSL, 0, size, r) = self.operands[2] { - return write!(fmt, "mov {}, {}", self.operands[0], Operand::Register(size, r)); + } else if let Operand::RegShift(style, amt, size, r) = self.operands[2] { + if style == ShiftStyle::LSL && amt == 0 { + return write!(fmt, "mov {}, {}", self.operands[0], Operand::Register(size, r)); + } } else { return write!(fmt, "mov {}, {}", self.operands[0], self.operands[2]); } @@ -341,6 +350,11 @@ impl Display for Instruction { } write!(fmt, "ands")?; }, + Opcode::NOT => { + // `This instruction is used by the alias MVN. The alias is always the preferred + // disassembly.` + write!(fmt, "mvn")?; + }, Opcode::ADDS => { if let Operand::Register(_, 31) = self.operands[0] { return write!(fmt, "cmn {}, {}", self.operands[1], self.operands[2]); @@ -351,13 +365,13 @@ impl Display for Instruction { }, Opcode::ADD => { if let Operand::Immediate(0) = self.operands[2] { - if let Operand::Register(_, 31) = self.operands[0] { - return write!(fmt, "mov {}, {}", self.operands[0], self.operands[1]); - } else if let Operand::RegisterOrSP(_, 31) = self.operands[0] { + if let Operand::RegisterOrSP(_, 31) = self.operands[0] { return write!(fmt, "mov {}, {}", self.operands[0], self.operands[1]); } else if let Operand::RegisterOrSP(_, 31) = self.operands[1] { return write!(fmt, "mov {}, {}", self.operands[0], self.operands[1]); } + } else if let Operand::Register(_, 31) = self.operands[1] { + return write!(fmt, "mov {}, {}", self.operands[0], self.operands[2]); } else if let Operand::RegShift(ShiftStyle::LSL, 0, size, reg) = self.operands[2] { return write!(fmt, "add {}, {}, {}", self.operands[0], self.operands[1], Operand::Register(size, reg)); } @@ -381,6 +395,12 @@ impl Display for Instruction { } write!(fmt, "sub")?; }, + Opcode::SBCS => { + if let Operand::Register(_, 31) = self.operands[1] { + return write!(fmt, "ngcs {}, {}", self.operands[0], self.operands[2]) + } + write!(fmt, "sbcs")?; + }, Opcode::UBFM => { if let Operand::Immediate(0) = self.operands[2] { let newdest = if let Operand::Register(_size, destnum) = self.operands[0] { @@ -422,10 +442,10 @@ impl Display for Instruction { unreachable!("operand 3 is a register"); }; if imms + 1 == immr { - return write!(fmt, "lsl {}, {}, {:#x}", self.operands[0], self.operands[1], size - imms - 1); + return write!(fmt, "lsl {}, {}, #{:#x}", self.operands[0], self.operands[1], size - imms - 1); } if imms < immr { - return write!(fmt, "ubfiz {}, {}, {:#x}, {:#x}", + return write!(fmt, "ubfiz {}, {}, #{:#x}, #{:#x}", self.operands[0], self.operands[1], size - immr, @@ -444,6 +464,30 @@ impl Display for Instruction { }; return write!(fmt, "ubfx {}, {}, {}, {}", self.operands[0], self.operands[1], self.operands[2], width); }, + Opcode::BFM => { + if let (Operand::Immediate(immr), Operand::Immediate(imms)) = (self.operands[2], self.operands[3]) { + if imms < immr { + if let Operand::Register(sz, rn) = self.operands[1] { + let width = imms + 1; + let lsb = if sz == SizeCode::W { + ((-(immr as i8)) as u8) & 0x1f + } else { + ((-(immr as i8)) as u8) & 0x3f + }; + if rn == 31 { + return write!(fmt, "bfc {}, #{:#x}, #{:#x}", self.operands[0], lsb, width); + } else { + return write!(fmt, "bfi {}, {}, #{:#x}, #{:#x}", self.operands[0], self.operands[1], lsb, width); + } + } + } else { + // bfxil + let lsb = immr; + let width = imms + 1 - lsb; + return write!(fmt, "bfxil {}, {}, #{:#x}, #{:#x}", self.operands[0], self.operands[1], lsb, width); + } + } + } Opcode::SBFM => { if let Operand::Immediate(63) = self.operands[3] { if let Operand::Register(SizeCode::X, _) = self.operands[0] { @@ -480,7 +524,7 @@ impl Display for Instruction { } else { unreachable!("operand 0 is always a register"); }; - return write!(fmt, "sbfiz {}, {}, {:#x}, {:#x}", + return write!(fmt, "sbfiz {}, {}, #{:#x}, #{:#x}", self.operands[0], self.operands[1], size - imms, @@ -544,7 +588,7 @@ impl Display for Instruction { } Opcode::CSNEG => { if let (Operand::Register(_size, rn), Operand::Register(_, rm), Operand::ConditionCode(cond)) = (self.operands[1], self.operands[2], self.operands[3]) { - if rn == rm { + if cond < 0b1110 && rn == rm { return write!(fmt, "cneg {}, {}, {}", self.operands[0], self.operands[2], Operand::ConditionCode(cond ^ 0x01)); } } else { @@ -572,7 +616,7 @@ impl Display for Instruction { (Operand::Register(_, n), Operand::Register(_, m), Operand::ConditionCode(cond)) => { if n == m && n != 31 && cond < 0b1110 { return write!(fmt, "cinv {}, {}, {}", self.operands[0], self.operands[1], Operand::ConditionCode(cond ^ 0x01)) - } else if n == m && n == 31 { + } else if n == m && n == 31 && cond < 0b1110 { return write!(fmt, "csetm {}, {}", self.operands[0], Operand::ConditionCode(cond ^ 0x01)); } } @@ -649,7 +693,7 @@ impl Display for Instruction { // `dup (element)` // manual says `mov` is the preferred disassembly here? but capstone uses // `dup`. - write!(fmt, "dup")?; + write!(fmt, "mov")?; } } Opcode::UMOV => { @@ -662,6 +706,318 @@ impl Display for Instruction { } } } + Opcode::LDADD(ar) => { + if let Operand::Register(_, rt) = self.operands[1] { + if rt == 31 && ar & 0b10 == 0b00 { + let inst = if ar & 0b01 == 0b00 { + "stadd" + } else { + "staddl" + }; + return write!(fmt, "{} {}, {}", inst, self.operands[0], self.operands[2]); + } + } + write!(fmt, "{}", self.opcode)?; + } + Opcode::LDCLR(ar) => { + if let Operand::Register(_, rt) = self.operands[1] { + if rt == 31 && ar & 0b10 == 0b00 { + let inst = if ar & 0b01 == 0b00 { + "stclr" + } else { + "stclrl" + }; + return write!(fmt, "{} {}, {}", inst, self.operands[0], self.operands[2]); + } + } + write!(fmt, "{}", self.opcode)?; + } + Opcode::LDSET(ar) => { + if let Operand::Register(_, rt) = self.operands[1] { + if rt == 31 && ar & 0b10 == 0b00 { + let inst = if ar & 0b01 == 0b00 { + "stset" + } else { + "stsetl" + }; + return write!(fmt, "{} {}, {}", inst, self.operands[0], self.operands[2]); + } + } + write!(fmt, "{}", self.opcode)?; + } + Opcode::LDSMAX(ar) => { + if let Operand::Register(_, rt) = self.operands[1] { + if rt == 31 && ar & 0b10 == 0b00 { + let inst = if ar & 0b01 == 0b00 { + "stsmax" + } else { + "stsmaxl" + }; + return write!(fmt, "{} {}, {}", inst, self.operands[0], self.operands[2]); + } + } + write!(fmt, "{}", self.opcode)?; + } + Opcode::LDSMIN(ar) => { + if let Operand::Register(_, rt) = self.operands[1] { + if rt == 31 && ar & 0b10 == 0b00 { + let inst = if ar & 0b01 == 0b00 { + "stsmin" + } else { + "stsminl" + }; + return write!(fmt, "{} {}, {}", inst, self.operands[0], self.operands[2]); + } + } + write!(fmt, "{}", self.opcode)?; + } + Opcode::LDUMAX(ar) => { + if let Operand::Register(_, rt) = self.operands[1] { + if rt == 31 && ar & 0b10 == 0b00 { + let inst = if ar & 0b01 == 0b00 { + "stumax" + } else { + "stumaxl" + }; + return write!(fmt, "{} {}, {}", inst, self.operands[0], self.operands[2]); + } + } + write!(fmt, "{}", self.opcode)?; + } + Opcode::LDUMIN(ar) => { + if let Operand::Register(_, rt) = self.operands[1] { + if rt == 31 && ar & 0b10 == 0b00 { + let inst = if ar & 0b01 == 0b00 { + "stumin" + } else { + "stuminl" + }; + return write!(fmt, "{} {}, {}", inst, self.operands[0], self.operands[2]); + } + } + write!(fmt, "{}", self.opcode)?; + } + Opcode::LDEOR(ar) => { + if let Operand::Register(_, rt) = self.operands[1] { + if rt == 31 && ar & 0b10 == 0b00 { + let inst = if ar & 0b01 == 0b00 { + "steor" + } else { + "steorl" + }; + return write!(fmt, "{} {}, {}", inst, self.operands[0], self.operands[2]); + } + } + write!(fmt, "{}", self.opcode)?; + } + Opcode::LDADDH(ar) => { + if let Operand::Register(_, rt) = self.operands[1] { + if rt == 31 && ar & 0b10 == 0b00 { + let inst = if ar & 0b01 == 0b00 { + "staddh" + } else { + "staddlh" + }; + return write!(fmt, "{} {}, {}", inst, self.operands[0], self.operands[2]); + } + } + write!(fmt, "{}", self.opcode)?; + } + Opcode::LDCLRH(ar) => { + if let Operand::Register(_, rt) = self.operands[1] { + if rt == 31 && ar & 0b10 == 0b00 { + let inst = if ar & 0b01 == 0b00 { + "stclrh" + } else { + "stclrlh" + }; + return write!(fmt, "{} {}, {}", inst, self.operands[0], self.operands[2]); + } + } + write!(fmt, "{}", self.opcode)?; + } + Opcode::LDSETH(ar) => { + if let Operand::Register(_, rt) = self.operands[1] { + if rt == 31 && ar & 0b10 == 0b00 { + let inst = if ar & 0b01 == 0b00 { + "stseth" + } else { + "stsetlh" + }; + return write!(fmt, "{} {}, {}", inst, self.operands[0], self.operands[2]); + } + } + write!(fmt, "{}", self.opcode)?; + } + Opcode::LDSMAXH(ar) => { + if let Operand::Register(_, rt) = self.operands[1] { + if rt == 31 && ar & 0b10 == 0b00 { + let inst = if ar & 0b01 == 0b00 { + "stsmaxh" + } else { + "stsmaxlh" + }; + return write!(fmt, "{} {}, {}", inst, self.operands[0], self.operands[2]); + } + } + write!(fmt, "{}", self.opcode)?; + } + Opcode::LDSMINH(ar) => { + if let Operand::Register(_, rt) = self.operands[1] { + if rt == 31 && ar & 0b10 == 0b00 { + let inst = if ar & 0b01 == 0b00 { + "stsminh" + } else { + "stsminlh" + }; + return write!(fmt, "{} {}, {}", inst, self.operands[0], self.operands[2]); + } + } + write!(fmt, "{}", self.opcode)?; + } + Opcode::LDUMAXH(ar) => { + if let Operand::Register(_, rt) = self.operands[1] { + if rt == 31 && ar & 0b10 == 0b00 { + let inst = if ar & 0b01 == 0b00 { + "stumaxh" + } else { + "stumaxlh" + }; + return write!(fmt, "{} {}, {}", inst, self.operands[0], self.operands[2]); + } + } + write!(fmt, "{}", self.opcode)?; + } + Opcode::LDUMINH(ar) => { + if let Operand::Register(_, rt) = self.operands[1] { + if rt == 31 && ar & 0b10 == 0b00 { + let inst = if ar & 0b01 == 0b00 { + "stuminh" + } else { + "stuminlh" + }; + return write!(fmt, "{} {}, {}", inst, self.operands[0], self.operands[2]); + } + } + write!(fmt, "{}", self.opcode)?; + } + Opcode::LDEORH(ar) => { + if let Operand::Register(_, rt) = self.operands[1] { + if rt == 31 && ar & 0b10 == 0b00 { + let inst = if ar & 0b01 == 0b00 { + "steorh" + } else { + "steorlh" + }; + return write!(fmt, "{} {}, {}", inst, self.operands[0], self.operands[2]); + } + } + write!(fmt, "{}", self.opcode)?; + } + Opcode::LDADDB(ar) => { + if let Operand::Register(_, rt) = self.operands[1] { + if rt == 31 && ar & 0b10 == 0b00 { + let inst = if ar & 0b01 == 0b00 { + "staddb" + } else { + "staddlb" + }; + return write!(fmt, "{} {}, {}", inst, self.operands[0], self.operands[2]); + } + } + write!(fmt, "{}", self.opcode)?; + } + Opcode::LDCLRB(ar) => { + if let Operand::Register(_, rt) = self.operands[1] { + if rt == 31 && ar & 0b10 == 0b00 { + let inst = if ar & 0b01 == 0b00 { + "stclrb" + } else { + "stclrlb" + }; + return write!(fmt, "{} {}, {}", inst, self.operands[0], self.operands[2]); + } + } + write!(fmt, "{}", self.opcode)?; + } + Opcode::LDSETB(ar) => { + if let Operand::Register(_, rt) = self.operands[1] { + if rt == 31 && ar & 0b10 == 0b00 { + let inst = if ar & 0b01 == 0b00 { + "stsetb" + } else { + "stsetlb" + }; + return write!(fmt, "{} {}, {}", inst, self.operands[0], self.operands[2]); + } + } + write!(fmt, "{}", self.opcode)?; + } + Opcode::LDSMAXB(ar) => { + if let Operand::Register(_, rt) = self.operands[1] { + if rt == 31 && ar & 0b10 == 0b00 { + let inst = if ar & 0b01 == 0b00 { + "stsmaxb" + } else { + "stsmaxlb" + }; + return write!(fmt, "{} {}, {}", inst, self.operands[0], self.operands[2]); + } + } + write!(fmt, "{}", self.opcode)?; + } + Opcode::LDSMINB(ar) => { + if let Operand::Register(_, rt) = self.operands[1] { + if rt == 31 && ar & 0b10 == 0b00 { + let inst = if ar & 0b01 == 0b00 { + "stsminb" + } else { + "stsminlb" + }; + return write!(fmt, "{} {}, {}", inst, self.operands[0], self.operands[2]); + } + } + write!(fmt, "{}", self.opcode)?; + } + Opcode::LDUMAXB(ar) => { + if let Operand::Register(_, rt) = self.operands[1] { + if rt == 31 && ar & 0b10 == 0b00 { + let inst = if ar & 0b01 == 0b00 { + "stumaxb" + } else { + "stumaxlb" + }; + return write!(fmt, "{} {}, {}", inst, self.operands[0], self.operands[2]); + } + } + write!(fmt, "{}", self.opcode)?; + } + Opcode::LDUMINB(ar) => { + if let Operand::Register(_, rt) = self.operands[1] { + if rt == 31 && ar & 0b10 == 0b00 { + let inst = if ar & 0b01 == 0b00 { + "stuminb" + } else { + "stuminlb" + }; + return write!(fmt, "{} {}, {}", inst, self.operands[0], self.operands[2]); + } + } + write!(fmt, "{}", self.opcode)?; + } + Opcode::LDEORB(ar) => { + if let Operand::Register(_, rt) = self.operands[1] { + if rt == 31 && ar & 0b10 == 0b00 { + let inst = if ar & 0b01 == 0b00 { + "steorb" + } else { + "steorlb" + }; + return write!(fmt, "{} {}, {}", inst, self.operands[0], self.operands[2]); + } + } + write!(fmt, "{}", self.opcode)?; + } other => { write!(fmt, "{}", other)?; } }; @@ -958,9 +1314,7 @@ pub enum Opcode { UMLAL2, MLA, SDOT, - SQRDMULH2, SQDMULH, - SQDMULH2, SQDMULL, SQDMULL2, SMULL, @@ -1094,8 +1448,11 @@ pub enum Opcode { CMLT, ABS, XTN, + XTN2, SQXTN, + SQXTN2, FCVTN, + FCVTN2, FCMGT, FCVTL, FCVTL2, @@ -1113,9 +1470,13 @@ pub enum Opcode { CMLE, NEG, SQXTUN, + SQXTUN2, SHLL, + SHLL2, UQXTN, + UQXTN2, FCVTXN, + FCVTXN2, FCVTNU, FCVTMU, FCVTAU, @@ -1136,7 +1497,6 @@ pub enum Opcode { SQSHRN2, SQRSHRN2, SQSHRUN2, - SQRSHRUN2, UQSHRN2, UQRSHRN2, @@ -1204,7 +1564,9 @@ pub enum Opcode { LDRAA, LDRAB, - LDAPRH(u8), + LDAPR, + LDAPRH, + LDAPRB, SWP(u8), SWPB(u8), SWPH(u8), @@ -1261,6 +1623,26 @@ pub enum Opcode { STLUR, STLURB, STLURH, + + SETF8, + SETF16, + RMIF, + + NOT, + + RSHRN2, + SQRSHRUN2, + USHLL2, + + SHA1C, + SHA1P, + SHA1M, + SHA1SU0, + SHA256H, + SHA256H2, + SHA256SU1, + + SHRN2, } impl Display for Opcode { @@ -1444,9 +1826,7 @@ impl Display for Opcode { Opcode::UMLAL2 => "umlal2", Opcode::MLA => "mla", Opcode::SDOT => "sdot", - Opcode::SQRDMULH2 => "sqrdmulh2", Opcode::SQDMULH => "sqdmulh", - Opcode::SQDMULH2 => "sqdmulh2", Opcode::SQDMULL => "sqdmull", Opcode::SQDMULL2 => "sqdmull2", Opcode::SMULL => "smull", @@ -1469,6 +1849,7 @@ impl Display for Opcode { Opcode::SHL => "shl", Opcode::SQSHL => "sqshl", Opcode::SHRN => "shrn", + Opcode::SHRN2 => "shrn2", Opcode::RSHRN => "rshrn", Opcode::SQSHRN => "sqshrn", Opcode::SQRSHRN => "sqrshrn", @@ -1488,6 +1869,10 @@ impl Display for Opcode { Opcode::UQRSHRN => "uqrshrn", Opcode::MOVI => "movi", Opcode::MVNI => "mvni", + Opcode::NOT => "not", + Opcode::RSHRN2 => "rshrn2", + Opcode::SQRSHRUN2 => "sqrshrun2", + Opcode::USHLL2 => "ushll2", Opcode::SHADD => "shadd", Opcode::SQADD => "sqadd", Opcode::SRHADD => "srhadd", @@ -1579,8 +1964,11 @@ impl Display for Opcode { Opcode::CMLT => "cmlt", Opcode::ABS => "abs", Opcode::XTN => "xtn", + Opcode::XTN2 => "xtn2", Opcode::SQXTN => "sqxtn", + Opcode::SQXTN2 => "sqxtn2", Opcode::FCVTN => "fcvtn", + Opcode::FCVTN2 => "fcvtn2", Opcode::FCMGT => "fcmgt", Opcode::FCVTL => "fcvtl", Opcode::FCVTL2 => "fcvtl2", @@ -1597,9 +1985,13 @@ impl Display for Opcode { Opcode::CMLE => "cmle", Opcode::NEG => "neg", Opcode::SQXTUN => "sqxtun", + Opcode::SQXTUN2 => "sqxtun2", Opcode::SHLL => "shll", + Opcode::SHLL2 => "shll2", Opcode::UQXTN => "uqxtn", + Opcode::UQXTN2 => "uqxtn2", Opcode::FCVTXN => "fcvtxn", + Opcode::FCVTXN2 => "fcvtxn2", Opcode::FCVTNU => "fcvtnu", Opcode::FCVTMU => "fcvtmu", Opcode::FCVTAU => "fcvtau", @@ -1615,7 +2007,6 @@ impl Display for Opcode { Opcode::SQSHRN2 => "sqshrn2", Opcode::SQRSHRN2 => "sqrshrn2", Opcode::SQSHRUN2 => "sqshrun2", - Opcode::SQRSHRUN2 => "sqrshrun2", Opcode::UQSHRN2 => "uqshrn2", Opcode::UQRSHRN2 => "uqrshrn2", Opcode::FMLS => "fmls", @@ -1671,26 +2062,18 @@ impl Display for Opcode { Opcode::XAR => "xar", Opcode::LDRAA => "ldraa", Opcode::LDRAB => "ldrab", - Opcode::LDAPRH(ar) => { - if ar == 0 { - "ldaprh" - } else if ar == 0b01 { - "ldaprlh" - } else if ar == 0b10 { - "ldaprah" - } else { - "ldapralh" - } - } + Opcode::LDAPR => "ldapr", + Opcode::LDAPRH => "ldaprh", + Opcode::LDAPRB => "ldaprb", Opcode::SWP(ar) => { if ar == 0 { "swp" } else if ar == 0b01 { - "swlp" + "swpl" } else if ar == 0b10 { - "swap" + "swpa" } else { - "swalp" + "swpal" } } Opcode::SWPB(ar) => { @@ -2040,6 +2423,18 @@ impl Display for Opcode { Opcode::STLURB => "stlurb", Opcode::STLURH => "stlurh", + Opcode::SETF8 => "setf8", + Opcode::SETF16 => "setf16", + Opcode::RMIF => "rmif", + + Opcode::SHA1C => "sha1c", + Opcode::SHA1P => "sha1p", + Opcode::SHA1M => "sha1m", + Opcode::SHA1SU0 => "sha1su0", + Opcode::SHA256H => "sha256h", + Opcode::SHA256H2 => "sha256h2", + Opcode::SHA256SU1 => "sha256su1", + Opcode::Bcc(cond) => { return write!(fmt, "b.{}", Operand::ConditionCode(cond)); }, @@ -2182,6 +2577,7 @@ pub enum Operand { SIMDRegister(SIMDSizeCode, u16), SIMDRegisterElements(SIMDSizeCode, u16, SIMDSizeCode), SIMDRegisterElementsLane(SIMDSizeCode, u16, SIMDSizeCode, u8), + SIMDRegisterElementsMultipleLane(SIMDSizeCode, u16, SIMDSizeCode, u8, u8), SIMDRegisterGroup(SIMDSizeCode, u16, SIMDSizeCode, u8), SIMDRegisterGroupLane(u16, SIMDSizeCode, u8, u8), RegisterOrSP(SizeCode, u16), @@ -2355,7 +2751,7 @@ impl Display for Operand { 0b1001 => { write!(fmt, "ls") } 0b1011 => { write!(fmt, "lt") } 0b1101 => { write!(fmt, "le") } - 0b1111 => { write!(fmt, "al") } + 0b1111 => { write!(fmt, "nv") } // `The Condition code NV exists only to provide a valid disassembly of the 0b1111 encoding, otherwise its behavior is identical to AL`. _ => { unreachable!(); } } } @@ -2430,46 +2826,38 @@ impl Display for Operand { Operand::RegOffset(reg, offset) => { if *offset != 0 { if *offset < 0 { - write!(fmt, "[{}, -{:#x}]", Operand::RegisterOrSP(SizeCode::X, *reg), -*offset) + write!(fmt, "[{}, #-{:#x}]", Operand::RegisterOrSP(SizeCode::X, *reg), -*offset) } else { - write!(fmt, "[{}, {:#x}]", Operand::RegisterOrSP(SizeCode::X, *reg), offset) + write!(fmt, "[{}, #{:#x}]", Operand::RegisterOrSP(SizeCode::X, *reg), offset) } } else { write!(fmt, "[{}]", Operand::RegisterOrSP(SizeCode::X, *reg)) } } Operand::RegRegOffset(reg, index_reg, index_size, extend, amount) => { - if *extend == ShiftStyle::LSL && *amount == 0 { - write!(fmt, "[{}, {}]", Operand::RegisterOrSP(SizeCode::X, *reg), Operand::RegisterOrSP(*index_size, *index_reg)) - } else { - write!(fmt, "[{}, {}, {} {}]", Operand::RegisterOrSP(SizeCode::X, *reg), Operand::RegisterOrSP(*index_size, *index_reg), extend, amount) - } + write!(fmt, "[{}, {}, {} #{:#x}]", Operand::RegisterOrSP(SizeCode::X, *reg), Operand::Register(*index_size, *index_reg), extend, amount) } - Operand::RegPreIndex(reg, offset, wback) => { - let wback = if *wback { + Operand::RegPreIndex(reg, offset, wback_bit) => { + let wback = if *wback_bit { "!" } else { "" }; - if *offset != 0 { + if *offset != 0 || *wback_bit { if *offset < 0 { - write!(fmt, "[{}, -{:#x}]{}", Operand::RegisterOrSP(SizeCode::X, *reg), -*offset, wback) + write!(fmt, "[{}, #-{:#x}]{}", Operand::RegisterOrSP(SizeCode::X, *reg), -*offset, wback) } else { - write!(fmt, "[{}, {:#x}]{}", Operand::RegisterOrSP(SizeCode::X, *reg), offset, wback) + write!(fmt, "[{}, #{:#x}]{}", Operand::RegisterOrSP(SizeCode::X, *reg), offset, wback) } } else { - write!(fmt, "[{}]{}", Operand::RegisterOrSP(SizeCode::X, *reg), wback) + write!(fmt, "[{}]", Operand::RegisterOrSP(SizeCode::X, *reg)) } } Operand::RegPostIndex(reg, offset) => { - if *offset != 0 { - if *offset < 0 { - write!(fmt, "[{}], #-{}", Operand::RegisterOrSP(SizeCode::X, *reg), -*offset) - } else { - write!(fmt, "[{}], #{}", Operand::RegisterOrSP(SizeCode::X, *reg), offset) - } + if *offset < 0 { + write!(fmt, "[{}], #-{:#x}", Operand::RegisterOrSP(SizeCode::X, *reg), -*offset) } else { - write!(fmt, "[{}]", Operand::RegisterOrSP(SizeCode::X, *reg)) + write!(fmt, "[{}], #{:#x}", Operand::RegisterOrSP(SizeCode::X, *reg), offset) } } Operand::RegPostIndexReg(reg, offset_reg) => { @@ -2578,62 +2966,113 @@ impl Decoder<ARMv8> for InstDecoder { return Err(DecodeError::InvalidOperand); } - let (T, shift) = if immh > 0b0111 { - (SIMDSizeCode::D, ((immh << 3) | immb) & 0b0111_111) - } else if immh > 0b0011 { - (SIMDSizeCode::S, ((immh << 3) | immb) & 0b0011_111) - } else if immh > 0b0001 { - (SIMDSizeCode::H, ((immh << 3) | immb) & 0b0101_111) - } else { - (SIMDSizeCode::B, ((immh << 3) | immb) & 0b0000_111) - }; let datasize = if Q == 1 { SIMDSizeCode::Q } else { SIMDSizeCode::D }; - const OPCODES: &[Result<Opcode, DecodeError>] = &[ - Ok(Opcode::SSHR), Err(DecodeError::InvalidOpcode), - Ok(Opcode::SSRA), Err(DecodeError::InvalidOpcode), - Ok(Opcode::SRSHR), Err(DecodeError::InvalidOpcode), - Ok(Opcode::SRSRA), Err(DecodeError::InvalidOpcode), + // is shift encoded as `N - imm` or `imm - N`? + const OPCODES: &[Result<(Opcode, bool), DecodeError>] = &[ + Ok((Opcode::SSHR, true)), Err(DecodeError::InvalidOpcode), + Ok((Opcode::SSRA, true)), Err(DecodeError::InvalidOpcode), + Ok((Opcode::SRSHR, true)), Err(DecodeError::InvalidOpcode), + Ok((Opcode::SRSRA, true)), Err(DecodeError::InvalidOpcode), // 0b01000 - Err(DecodeError::InvalidOpcode), Err(DecodeError::InvalidOpcode), - Ok(Opcode::SHL), Err(DecodeError::InvalidOpcode), - Err(DecodeError::InvalidOpcode), Err(DecodeError::InvalidOpcode), - Ok(Opcode::SQSHL), Err(DecodeError::InvalidOpcode), + Err(DecodeError::InvalidOpcode), Err(DecodeError::InvalidOpcode), + Ok((Opcode::SHL, false)), Err(DecodeError::InvalidOpcode), + Err(DecodeError::InvalidOpcode), Err(DecodeError::InvalidOpcode), + Ok((Opcode::SQSHL, false)), Err(DecodeError::InvalidOpcode), // 0b10000 - Ok(Opcode::SHRN), Ok(Opcode::RSHRN), - Ok(Opcode::SQSHRN), Ok(Opcode::SQRSHRN), - Ok(Opcode::SSHLL), Err(DecodeError::InvalidOpcode), - Err(DecodeError::InvalidOpcode), Err(DecodeError::InvalidOpcode), + Ok((Opcode::SHRN, true)), Ok((Opcode::RSHRN, true)), + Ok((Opcode::SQSHRN, true)), Ok((Opcode::SQRSHRN, true)), + Ok((Opcode::SSHLL, false)), Err(DecodeError::InvalidOpcode), + Err(DecodeError::InvalidOpcode), Err(DecodeError::InvalidOpcode), // 0b11000 - Err(DecodeError::InvalidOpcode), Err(DecodeError::InvalidOpcode), - Err(DecodeError::InvalidOpcode), Err(DecodeError::InvalidOpcode), - Ok(Opcode::SCVTF), Err(DecodeError::InvalidOpcode), - Err(DecodeError::InvalidOpcode), Ok(Opcode::FCVTZS), + Err(DecodeError::InvalidOpcode), Err(DecodeError::InvalidOpcode), + Err(DecodeError::InvalidOpcode), Err(DecodeError::InvalidOpcode), + Ok((Opcode::SCVTF, true)), Err(DecodeError::InvalidOpcode), + Err(DecodeError::InvalidOpcode), Ok((Opcode::FCVTZS, true)), // U == 1 - Ok(Opcode::USHR), Err(DecodeError::InvalidOpcode), - Ok(Opcode::USRA), Err(DecodeError::InvalidOpcode), - Ok(Opcode::URSHR), Err(DecodeError::InvalidOpcode), - Ok(Opcode::URSRA), Err(DecodeError::InvalidOpcode), + Ok((Opcode::USHR, true)), Err(DecodeError::InvalidOpcode), + Ok((Opcode::USRA, true)), Err(DecodeError::InvalidOpcode), + Ok((Opcode::URSHR, true)), Err(DecodeError::InvalidOpcode), + Ok((Opcode::URSRA, true)), Err(DecodeError::InvalidOpcode), // 0b01000 - Ok(Opcode::SRI), Err(DecodeError::InvalidOpcode), - Ok(Opcode::SLI), Err(DecodeError::InvalidOpcode), - Ok(Opcode::SQSHLU), Err(DecodeError::InvalidOpcode), - Ok(Opcode::UQSHL), Err(DecodeError::InvalidOpcode), + Ok((Opcode::SRI, true)), Err(DecodeError::InvalidOpcode), + Ok((Opcode::SLI, false)), Err(DecodeError::InvalidOpcode), + Ok((Opcode::SQSHLU, false)), Err(DecodeError::InvalidOpcode), + Ok((Opcode::UQSHL, false)), Err(DecodeError::InvalidOpcode), // 0b10000 - Ok(Opcode::SQSHRUN), Ok(Opcode::SQRSHRUN), - Ok(Opcode::UQSHRN), Ok(Opcode::UQRSHRN), - Ok(Opcode::USHLL), Err(DecodeError::InvalidOpcode), - Err(DecodeError::InvalidOpcode), Err(DecodeError::InvalidOpcode), + Ok((Opcode::SQSHRUN, true)), Ok((Opcode::SQRSHRUN, true)), + Ok((Opcode::UQSHRN, true)), Ok((Opcode::UQRSHRN, true)), + Ok((Opcode::USHLL, false)), Err(DecodeError::InvalidOpcode), + Err(DecodeError::InvalidOpcode), Err(DecodeError::InvalidOpcode), // 0b11000 - Err(DecodeError::InvalidOpcode), Err(DecodeError::InvalidOpcode), - Err(DecodeError::InvalidOpcode), Err(DecodeError::InvalidOpcode), - Ok(Opcode::UCVTF), Err(DecodeError::InvalidOpcode), - Err(DecodeError::InvalidOpcode), Ok(Opcode::FCVTZU), + Err(DecodeError::InvalidOpcode), Err(DecodeError::InvalidOpcode), + Err(DecodeError::InvalidOpcode), Err(DecodeError::InvalidOpcode), + Ok((Opcode::UCVTF, true)), Err(DecodeError::InvalidOpcode), + Err(DecodeError::InvalidOpcode), Ok((Opcode::FCVTZU, true)), ]; - inst.opcode = OPCODES[((U << 5) | opcode) as usize]?; + let (opcode, before) = OPCODES[((U << 5) | opcode) as usize]?; + inst.opcode = opcode; + let (T, shift) = if before { + if immh > 0b0111 { + (SIMDSizeCode::D, 128 - ((immh << 3) | immb)) + } else if immh > 0b0011 { + (SIMDSizeCode::S, 64 - ((immh << 3) | immb)) + } else if immh > 0b0001 { + (SIMDSizeCode::H, 32 - ((immh << 3) | immb)) + } else { + (SIMDSizeCode::B, 16 - ((immh << 3) | immb)) + } + } else { + if immh > 0b0111 { + (SIMDSizeCode::D, ((immh << 3) | immb) - 64) + } else if immh > 0b0011 { + (SIMDSizeCode::S, ((immh << 3) | immb) - 32) + } else if immh > 0b0001 { + (SIMDSizeCode::H, ((immh << 3) | immb) - 16) + } else { + (SIMDSizeCode::B, ((immh << 3) | immb) - 8) + } + }; + + let (Vb, Tb) = if opcode == Opcode::SQSHRUN || opcode == Opcode::SQRSHRUN || opcode == Opcode::UQSHRN || opcode == Opcode::UQRSHRN || opcode == Opcode::SHRN || opcode == Opcode::RSHRN || opcode == Opcode::SQSHRN || opcode == Opcode::SQRSHRN { + if immh > 0b0111 { + return Err(DecodeError::InvalidOperand); + } else if immh > 0b0011 { + (SIMDSizeCode::Q, SIMDSizeCode::D) + } else if immh > 0b0001 { + (SIMDSizeCode::Q, SIMDSizeCode::S) + } else { + (SIMDSizeCode::Q, SIMDSizeCode::H) + } + } else { + (datasize, T) + }; + + if Q == 1 { + if inst.opcode == Opcode::RSHRN { + inst.opcode = Opcode::RSHRN2; + } else if inst.opcode == Opcode::SQSHRUN { + inst.opcode = Opcode::SQSHRUN2; + } else if inst.opcode == Opcode::SQRSHRUN { + inst.opcode = Opcode::SQRSHRUN2; + } else if inst.opcode == Opcode::UQSHRN { + inst.opcode = Opcode::UQSHRN2; + } else if inst.opcode == Opcode::UQRSHRN { + inst.opcode = Opcode::UQRSHRN2; + } else if inst.opcode == Opcode::USHLL { + inst.opcode = Opcode::USHLL2; + } else if inst.opcode == Opcode::SHRN { + inst.opcode = Opcode::SHRN2; + } else if inst.opcode == Opcode::SQSHRN { + inst.opcode = Opcode::SQSHRN2; + } else if inst.opcode == Opcode::SQRSHRN { + inst.opcode = Opcode::SQRSHRN2; + } + }; + inst.operands = [ Operand::SIMDRegisterElements(datasize, Rd as u16, T), - Operand::SIMDRegisterElements(datasize, Rn as u16, T), + Operand::SIMDRegisterElements(Vb, Rn as u16, Tb), Operand::Immediate(shift), Operand::Nothing, ]; @@ -2666,7 +3105,7 @@ impl Decoder<ARMv8> for InstDecoder { Ok((Opcode::MVNI, SIMDSizeCode::S)), Ok((Opcode::BIC, SIMDSizeCode::S)), Ok((Opcode::MVNI, SIMDSizeCode::H)), Ok((Opcode::BIC, SIMDSizeCode::H)), Ok((Opcode::MVNI, SIMDSizeCode::H)), Ok((Opcode::BIC, SIMDSizeCode::H)), - Ok((Opcode::MVNI, SIMDSizeCode::S)), Ok((Opcode::BIC, SIMDSizeCode::S)), + Ok((Opcode::MVNI, SIMDSizeCode::S)), Ok((Opcode::MVNI, SIMDSizeCode::S)), Ok((Opcode::MOVI, SIMDSizeCode::D)), Ok((Opcode::FMOV, SIMDSizeCode::B)), ]; @@ -2734,7 +3173,7 @@ impl Decoder<ARMv8> for InstDecoder { } _ => 0, }; - if cmode & 0b1110 == 0b1100 && op == 0 { + if cmode & 0b1110 == 0b1100 { let amount = (cmode & 1) << 3; Operand::ImmShiftMSL(imm8 as u16, amount as u8 + 8) } else { @@ -2780,12 +3219,12 @@ impl Decoder<ARMv8> for InstDecoder { return Err(DecodeError::InvalidOperand); } - let (index, Rm) = if size == 0b10 { + let (index, Rm) = if size == 0b01 { let index = (H << 2) | (L << 1) | M; - let Rm = (M << 4) | Rm; (index, Rm) } else { let index = (H << 1) | L; + let Rm = (M << 4) | Rm; (index, Rm) }; @@ -2813,12 +3252,12 @@ impl Decoder<ARMv8> for InstDecoder { return Err(DecodeError::InvalidOperand); } - let (index, Rm) = if size == 0b10 { + let (index, Rm) = if size == 0b01 { let index = (H << 2) | (L << 1) | M; - let Rm = (M << 4) | Rm; (index, Rm) } else { let index = (H << 1) | L; + let Rm = (M << 4) | Rm; (index, Rm) }; @@ -2846,12 +3285,12 @@ impl Decoder<ARMv8> for InstDecoder { return Err(DecodeError::InvalidOperand); } - let (index, Rm) = if size == 0b10 { + let (index, Rm) = if size == 0b01 { let index = (H << 2) | (L << 1) | M; - let Rm = (M << 4) | Rm; (index, Rm) } else { let index = (H << 1) | L; + let Rm = (M << 4) | Rm; (index, Rm) }; @@ -2879,12 +3318,12 @@ impl Decoder<ARMv8> for InstDecoder { return Err(DecodeError::InvalidOperand); } - let (index, Rm) = if size == 0b10 { + let (index, Rm) = if size == 0b01 { let index = (H << 2) | (L << 1) | M; - let Rm = (M << 4) | Rm; (index, Rm) } else { let index = (H << 1) | L; + let Rm = (M << 4) | Rm; (index, Rm) }; @@ -2912,12 +3351,12 @@ impl Decoder<ARMv8> for InstDecoder { return Err(DecodeError::InvalidOperand); } - let (index, Rm) = if size == 0b10 { + let (index, Rm) = if size == 0b01 { let index = (H << 2) | (L << 1) | M; - let Rm = (M << 4) | Rm; (index, Rm) } else { let index = (H << 1) | L; + let Rm = (M << 4) | Rm; (index, Rm) }; @@ -2941,12 +3380,12 @@ impl Decoder<ARMv8> for InstDecoder { return Err(DecodeError::InvalidOperand); } - let (index, Rm) = if size == 0b10 { + let (index, Rm) = if size == 0b01 { let index = (H << 2) | (L << 1) | M; - let Rm = (M << 4) | Rm; (index, Rm) } else { let index = (H << 1) | L; + let Rm = (M << 4) | Rm; (index, Rm) }; @@ -2974,12 +3413,12 @@ impl Decoder<ARMv8> for InstDecoder { return Err(DecodeError::InvalidOperand); } - let (index, Rm) = if size == 0b10 { + let (index, Rm) = if size == 0b01 { let index = (H << 2) | (L << 1) | M; - let Rm = (M << 4) | Rm; (index, Rm) } else { let index = (H << 1) | L; + let Rm = (M << 4) | Rm; (index, Rm) }; @@ -3007,27 +3446,23 @@ impl Decoder<ARMv8> for InstDecoder { return Err(DecodeError::InvalidOperand); } - let (index, Rm) = if size == 0b10 { + let (index, Rm) = if size == 0b01 { let index = (H << 2) | (L << 1) | M; - let Rm = (M << 4) | Rm; (index, Rm) } else { let index = (H << 1) | L; + let Rm = (M << 4) | Rm; (index, Rm) }; let Tb_vecsize = if Q == 1 { SIMDSizeCode::Q } else { SIMDSizeCode::D }; let (Ta, Tb_elemsize, Ts) = if size == 0b01 { - (SIMDSizeCode::S, SIMDSizeCode::H, SIMDSizeCode::H) + (SIMDSizeCode::H, SIMDSizeCode::H, SIMDSizeCode::H) } else { - (SIMDSizeCode::D, SIMDSizeCode::S, SIMDSizeCode::S) + (SIMDSizeCode::S, SIMDSizeCode::S, SIMDSizeCode::S) }; - inst.opcode = if Q == 1 { - Opcode::SQDMULH2 - } else { - Opcode::SQDMULH - }; + inst.opcode = Opcode::SQDMULH; inst.operands = [ Operand::SIMDRegisterElements(SIMDSizeCode::Q, Rd as u16, Ta), Operand::SIMDRegisterElements(Tb_vecsize, Rn as u16, Tb_elemsize), @@ -3040,27 +3475,23 @@ impl Decoder<ARMv8> for InstDecoder { return Err(DecodeError::InvalidOperand); } - let (index, Rm) = if size == 0b10 { + let (index, Rm) = if size == 0b01 { let index = (H << 2) | (L << 1) | M; - let Rm = (M << 4) | Rm; (index, Rm) } else { let index = (H << 1) | L; + let Rm = (M << 4) | Rm; (index, Rm) }; let Tb_vecsize = if Q == 1 { SIMDSizeCode::Q } else { SIMDSizeCode::D }; let (Ta, Tb_elemsize, Ts) = if size == 0b01 { - (SIMDSizeCode::S, SIMDSizeCode::H, SIMDSizeCode::H) + (SIMDSizeCode::H, SIMDSizeCode::H, SIMDSizeCode::H) } else { - (SIMDSizeCode::D, SIMDSizeCode::S, SIMDSizeCode::S) + (SIMDSizeCode::S, SIMDSizeCode::S, SIMDSizeCode::S) }; - inst.opcode = if Q == 1 { - Opcode::SQRDMULH2 - } else { - Opcode::SQRDMULH - }; + inst.opcode = Opcode::SQRDMULH; inst.operands = [ Operand::SIMDRegisterElements(SIMDSizeCode::Q, Rd as u16, Ta), Operand::SIMDRegisterElements(Tb_vecsize, Rn as u16, Tb_elemsize), @@ -3082,7 +3513,7 @@ impl Decoder<ARMv8> for InstDecoder { inst.operands = [ Operand::SIMDRegisterElements(datasize, Rd as u16, SIMDSizeCode::S), Operand::SIMDRegisterElements(datasize, Rn as u16, SIMDSizeCode::B), - Operand::SIMDRegisterElementsLane(SIMDSizeCode::Q, Rm as u16, SIMDSizeCode::B, index as u8), + Operand::SIMDRegisterElementsMultipleLane(SIMDSizeCode::Q, Rm as u16, SIMDSizeCode::B, index as u8, 4), Operand::Nothing, ]; }, @@ -3264,12 +3695,12 @@ impl Decoder<ARMv8> for InstDecoder { return Err(DecodeError::InvalidOperand); } - let (index, Rm) = if size == 0b10 { + let (index, Rm) = if size == 0b01 { let index = (H << 2) | (L << 1) | M; - let Rm = (M << 4) | Rm; (index, Rm) } else { let index = (H << 1) | L; + let Rm = (M << 4) | Rm; (index, Rm) }; @@ -3293,12 +3724,12 @@ impl Decoder<ARMv8> for InstDecoder { return Err(DecodeError::InvalidOperand); } - let (index, Rm) = if size == 0b10 { + let (index, Rm) = if size == 0b01 { let index = (H << 2) | (L << 1) | M; - let Rm = (M << 4) | Rm; (index, Rm) } else { let index = (H << 1) | L; + let Rm = (M << 4) | Rm; (index, Rm) }; @@ -3326,12 +3757,12 @@ impl Decoder<ARMv8> for InstDecoder { return Err(DecodeError::InvalidOperand); } - let (index, Rm) = if size == 0b10 { + let (index, Rm) = if size == 0b01 { let index = (H << 2) | (L << 1) | M; - let Rm = (M << 4) | Rm; (index, Rm) } else { let index = (H << 1) | L; + let Rm = (M << 4) | Rm; (index, Rm) }; @@ -3355,12 +3786,12 @@ impl Decoder<ARMv8> for InstDecoder { return Err(DecodeError::InvalidOperand); } - let (index, Rm) = if size == 0b10 { + let (index, Rm) = if size == 0b01 { let index = (H << 2) | (L << 1) | M; - let Rm = (M << 4) | Rm; (index, Rm) } else { let index = (H << 1) | L; + let Rm = (M << 4) | Rm; (index, Rm) }; @@ -3388,12 +3819,12 @@ impl Decoder<ARMv8> for InstDecoder { return Err(DecodeError::InvalidOperand); } - let (index, Rm) = if size == 0b10 { + let (index, Rm) = if size == 0b01 { let index = (H << 2) | (L << 1) | M; - let Rm = (M << 4) | Rm; (index, Rm) } else { let index = (H << 1) | L; + let Rm = (M << 4) | Rm; (index, Rm) }; @@ -3424,25 +3855,25 @@ impl Decoder<ARMv8> for InstDecoder { return Err(DecodeError::InvalidOperand); } - let (index, Rm) = if size == 0b10 { + let (index, Rm) = if size == 0b01 { let index = (H << 2) | (L << 1) | M; - let Rm = (M << 4) | Rm; (index, Rm) } else { let index = (H << 1) | L; + let Rm = (M << 4) | Rm; (index, Rm) }; let Tb_vecsize = if Q == 1 { SIMDSizeCode::Q } else { SIMDSizeCode::D }; let (Ta, Tb_elemsize, Ts) = if size == 0b01 { - (SIMDSizeCode::S, SIMDSizeCode::H, SIMDSizeCode::H) + (SIMDSizeCode::H, SIMDSizeCode::H, SIMDSizeCode::H) } else { - (SIMDSizeCode::D, SIMDSizeCode::S, SIMDSizeCode::S) + (SIMDSizeCode::S, SIMDSizeCode::S, SIMDSizeCode::S) }; inst.opcode = Opcode::SQRDMLAH; inst.operands = [ - Operand::SIMDRegisterElements(SIMDSizeCode::Q, Rd as u16, Ta), + Operand::SIMDRegisterElements(Tb_vecsize, Rd as u16, Ta), Operand::SIMDRegisterElements(Tb_vecsize, Rn as u16, Tb_elemsize), Operand::SIMDRegisterElementsLane(SIMDSizeCode::Q, Rm as u16, Ts, index as u8), Operand::Nothing, @@ -3462,7 +3893,7 @@ impl Decoder<ARMv8> for InstDecoder { inst.operands = [ Operand::SIMDRegisterElements(datasize, Rd as u16, SIMDSizeCode::S), Operand::SIMDRegisterElements(datasize, Rn as u16, SIMDSizeCode::B), - Operand::SIMDRegisterElementsLane(SIMDSizeCode::Q, Rm as u16, SIMDSizeCode::B, index as u8), + Operand::SIMDRegisterElementsMultipleLane(SIMDSizeCode::Q, Rm as u16, SIMDSizeCode::B, index as u8, 4), Operand::Nothing, ]; } @@ -3471,25 +3902,25 @@ impl Decoder<ARMv8> for InstDecoder { return Err(DecodeError::InvalidOperand); } - let (index, Rm) = if size == 0b10 { + let (index, Rm) = if size == 0b01 { let index = (H << 2) | (L << 1) | M; - let Rm = (M << 4) | Rm; (index, Rm) } else { let index = (H << 1) | L; + let Rm = (M << 4) | Rm; (index, Rm) }; let Tb_vecsize = if Q == 1 { SIMDSizeCode::Q } else { SIMDSizeCode::D }; let (Ta, Tb_elemsize, Ts) = if size == 0b01 { - (SIMDSizeCode::S, SIMDSizeCode::H, SIMDSizeCode::H) + (SIMDSizeCode::H, SIMDSizeCode::H, SIMDSizeCode::H) } else { - (SIMDSizeCode::D, SIMDSizeCode::S, SIMDSizeCode::S) + (SIMDSizeCode::S, SIMDSizeCode::S, SIMDSizeCode::S) }; inst.opcode = Opcode::SQRDMLSH; inst.operands = [ - Operand::SIMDRegisterElements(SIMDSizeCode::Q, Rd as u16, Ta), + Operand::SIMDRegisterElements(Tb_vecsize, Rd as u16, Ta), Operand::SIMDRegisterElements(Tb_vecsize, Rn as u16, Tb_elemsize), Operand::SIMDRegisterElementsLane(SIMDSizeCode::Q, Rm as u16, Ts, index as u8), Operand::Nothing, @@ -3532,18 +3963,24 @@ impl Decoder<ARMv8> for InstDecoder { return Err(DecodeError::InvalidOpcode); } - let (index, Rm) = if size == 0b10 { + let (index, Rm) = if size == 0b00 { let index = (H << 2) | (L << 1) | M; - let Rm = (M << 4) | Rm; (index, Rm) - } else { + } else if size == 0b10 { let index = (H << 1) | L; + let Rm = (M << 4) | Rm; (index, Rm) + } else { + if L == 1 { + return Err(DecodeError::InvalidOperand); + } + let Rm = (M << 4) | Rm; + (H, Rm) }; let datasize = if Q == 1 { SIMDSizeCode::Q } else { SIMDSizeCode::D }; let (Ta, Tb_elemsize, Ts) = if size == 0b00 { - (SIMDSizeCode::H, SIMDSizeCode::H, SIMDSizeCode::S) + (SIMDSizeCode::H, SIMDSizeCode::H, SIMDSizeCode::H) } else if size == 0b10 { (SIMDSizeCode::S, SIMDSizeCode::S, SIMDSizeCode::S) } else /* if size == 0b11 */ { @@ -3573,10 +4010,10 @@ impl Decoder<ARMv8> for InstDecoder { return Err(DecodeError::InvalidOperand); } - let index = if size == 0b10 { - H - } else { + let index = if size == 0b01 { (H << 1) | L + } else { + H }; let Rm = (M << 4) | Rm; @@ -3842,11 +4279,7 @@ impl Decoder<ARMv8> for InstDecoder { if size != 0b00 && size != 0b11 { return Err(DecodeError::InvalidOperand); } - let ta_size = if size == 0b00 { - SIMDSizeCode::D - } else { - SIMDSizeCode::Q - }; + let ta_size = SIMDSizeCode::Q; inst.operands = [ Operand::SIMDRegisterElements(ta_size, Rd as u16, Ta), Operand::SIMDRegisterElements(datasize, Rn as u16, Tb), @@ -3903,9 +4336,9 @@ impl Decoder<ARMv8> for InstDecoder { ]; const TABLE_E: &'static OperandSizeTable = &[ - Ok((D, B, Q, H)), Ok((Q, H, Q, H)), - Ok((D, H, Q, S)), Ok((Q, S, Q, S)), - Ok((D, S, Q, D)), Ok((Q, D, Q, D)), + Ok((D, B, Q, H)), Ok((Q, B, Q, H)), + Ok((D, H, Q, S)), Ok((Q, H, Q, S)), + Ok((D, S, Q, D)), Ok((Q, S, Q, D)), Err(DecodeError::InvalidOperand), Err(DecodeError::InvalidOperand), ]; @@ -3940,21 +4373,28 @@ impl Decoder<ARMv8> for InstDecoder { Err(DecodeError::InvalidOperand), Ok((Q, D, Q, D)), ]; + const TABLE_J: &'static OperandSizeTable = &[ + Ok((Q, H, D, B)), Ok((Q, H, Q, B)), + Ok((Q, S, D, H)), Ok((Q, S, Q, H)), + Ok((Q, D, D, S)), Ok((Q, D, Q, S)), + Err(DecodeError::InvalidOperand), Err(DecodeError::InvalidOperand), + ]; + if op2 & 0b0111 == 0b0100 { // `Advanced SIMD two-register miscellaneous` const OPCODES_U0_LOW: &[Result<(Opcode, &'static OperandSizeTable), DecodeError>; 20] = &[ Ok((Opcode::REV64, TABLE_A)), Ok((Opcode::REV16, TABLE_B)), Ok((Opcode::SADDLP, TABLE_C)), - Ok((Opcode::SUQADD, TABLE_D)), + Ok((Opcode::SUQADD, TABLE_A)), Ok((Opcode::CLS, TABLE_A)), Ok((Opcode::CNT, TABLE_B)), Ok((Opcode::SADALP, TABLE_C)), - Ok((Opcode::SQABS, TABLE_D)), - Ok((Opcode::CMGT, TABLE_D)), - Ok((Opcode::CMEQ, TABLE_D)), - Ok((Opcode::CMLT, TABLE_D)), - Ok((Opcode::ABS, TABLE_D)), + Ok((Opcode::SQABS, TABLE_A)), + Ok((Opcode::CMGT, TABLE_A)), + Ok((Opcode::CMEQ, TABLE_A)), + Ok((Opcode::CMLT, TABLE_A)), + Ok((Opcode::ABS, TABLE_A)), // 0b01100, all four size=1x Ok((Opcode::FCMGT, TABLE_I)), Ok((Opcode::FCMEQ, TABLE_I)), @@ -4002,15 +4442,15 @@ impl Decoder<ARMv8> for InstDecoder { Ok((Opcode::REV32, TABLE_A)), Err(DecodeError::InvalidOpcode), Ok((Opcode::UADDLP, TABLE_C)), - Ok((Opcode::USQADD, TABLE_D)), + Ok((Opcode::USQADD, TABLE_A)), Ok((Opcode::CLZ, TABLE_A)), Err(DecodeError::InvalidOpcode), Ok((Opcode::UADALP, TABLE_C)), - Ok((Opcode::SQNEG, TABLE_D)), - Ok((Opcode::CMGE, TABLE_D)), - Ok((Opcode::CMLE, TABLE_D)), + Ok((Opcode::SQNEG, TABLE_A)), + Ok((Opcode::CMGE, TABLE_A)), + Ok((Opcode::CMLE, TABLE_A)), Err(DecodeError::InvalidOpcode), - Ok((Opcode::NEG, TABLE_D)), + Ok((Opcode::NEG, TABLE_A)), // 0b01100, all four size=1x Ok((Opcode::FCMGE, TABLE_I)), Ok((Opcode::FCMLE, TABLE_I)), @@ -4020,7 +4460,7 @@ impl Decoder<ARMv8> for InstDecoder { Err(DecodeError::InvalidOpcode), Err(DecodeError::InvalidOpcode), Ok((Opcode::SQXTUN, TABLE_E)), - Ok((Opcode::SHLL, TABLE_E)), // TODO: verify + Ok((Opcode::SHLL, TABLE_J)), // 0b10100 ]; // index by low 3 of opcode | upper bit of size @@ -4052,7 +4492,20 @@ impl Decoder<ARMv8> for InstDecoder { // u == 1, op == 0b00000 ]; - let (opc, (datasize_a, elemsize_a, datasize_b, elemsize_b)) = if opcode < 0b10100 { + let (opc, (datasize_a, elemsize_a, datasize_b, elemsize_b)) = if opcode == 0b00101 && U == 1{ + let vecsize = if q == 0 { + SIMDSizeCode::D + } else { + SIMDSizeCode::Q + }; + if size == 0b00 { + (Opcode::NOT, (vecsize, SIMDSizeCode::B, vecsize, SIMDSizeCode::B)) + } else if size == 0b01 { + (Opcode::RBIT, (vecsize, SIMDSizeCode::B, vecsize, SIMDSizeCode::B)) + } else { + return Err(DecodeError::InvalidOpcode); + } + } else if opcode < 0b10100 { let (opc, table) = if U == 0 { OPCODES_U0_LOW[opcode as usize]? } else { @@ -4068,10 +4521,24 @@ impl Decoder<ARMv8> for InstDecoder { (opc, table[((size << 1) | q) as usize]?) }; - if opc == Opcode::FCVTL && q != 0 { - inst.opcode = Opcode::FCVTL2; - } else { - inst.opcode = opc; + inst.opcode = opc; + + if q != 0 { + if opc == Opcode::FCVTL { + inst.opcode = Opcode::FCVTL2; + } else if opc == Opcode::XTN { + inst.opcode = Opcode::XTN2; + } else if opc == Opcode::SQXTN { + inst.opcode = Opcode::SQXTN2; + } else if opc == Opcode::SQXTUN { + inst.opcode = Opcode::SQXTUN2; + } else if opc == Opcode::UQXTN { + inst.opcode = Opcode::UQXTN2; + } else if opc == Opcode::FCVTN { + inst.opcode = Opcode::FCVTN2; + } else if opc == Opcode::FCVTXN { + inst.opcode = Opcode::FCVTXN2; + } } inst.operands = [ Operand::SIMDRegisterElements(datasize_a, Rd as u16, elemsize_a), @@ -4083,6 +4550,15 @@ impl Decoder<ARMv8> for InstDecoder { inst.operands[2] = Operand::Imm64(0); } else if [Opcode::FCMGE, Opcode::FCMLE, Opcode::FCMGT, Opcode::FCMEQ, Opcode::FCMLT].contains(&inst.opcode) { inst.operands[2] = Operand::ImmediateDouble(0.0); + } else if inst.opcode == Opcode::SHLL { + if q == 1 { + inst.opcode = Opcode::SHLL2; + } + let sz = (word >> 22) & 0b11; + if sz == 0b11 { + return Err(DecodeError::InvalidOperand); + } + inst.operands[2] = Operand::Imm64((8 << sz) as u64); } } else if op2 & 0b0111 == 0b0110 { // `Advanced SIMD across lanes` @@ -4206,6 +4682,33 @@ impl Decoder<ARMv8> for InstDecoder { Operand::Nothing, Operand::Nothing, ]; + } else if op2 & 0b0111 == 0b0101 && op0 == 0b0100 { + // `Cryptographic AES` + let Rd = word & 0b11111; + let Rn = (word >> 5) & 0b11111; + let opcode = (word >> 12) & 0b11111; + let size = (word >> 22) & 0b11; + + if size != 0b00 { + return Err(DecodeError::InvalidOpcode); + } + + let opcode = match opcode { + 0b00100 => Opcode::AESE, + 0b00101 => Opcode::AESD, + 0b00110 => Opcode::AESMC, + 0b00111 => Opcode::AESIMC, + _ => { + return Err(DecodeError::InvalidOpcode); + } + }; + inst.opcode = opcode; + inst.operands = [ + Operand::SIMDRegisterElements(SIMDSizeCode::Q, Rd as u16, SIMDSizeCode::B), + Operand::SIMDRegisterElements(SIMDSizeCode::Q, Rn as u16, SIMDSizeCode::B), + Operand::Nothing, + Operand::Nothing, + ]; } } else { // op3 == 1xxxxx10 or x1xxxx10: both unallocated. @@ -4294,7 +4797,7 @@ impl Decoder<ARMv8> for InstDecoder { Operand::SIMDRegisterElements(vec_size, Rd as u16, elem_size), Operand::SIMDRegisterElements(vec_size, Rn as u16, elem_size), Operand::SIMDRegisterElements(vec_size, Rm as u16, elem_size), - Operand::Imm16(rot as u16), + Operand::Imm16(90 * (rot as u16)), ]; } else if opcode & 0b1101 == 0b1100 { // fcadd @@ -4320,7 +4823,7 @@ impl Decoder<ARMv8> for InstDecoder { Operand::SIMDRegisterElements(vec_size, Rd as u16, elem_size), Operand::SIMDRegisterElements(vec_size, Rn as u16, elem_size), Operand::SIMDRegisterElements(vec_size, Rm as u16, elem_size), - Operand::Imm16(rot as u16), + Operand::Imm16(90 + 180 * (rot as u16)), ]; } else { return Err(DecodeError::InvalidOpcode); @@ -4796,7 +5299,7 @@ impl Decoder<ARMv8> for InstDecoder { return Err(DecodeError::InvalidOpcode); } - if mode != 0b00 && opcode >= 0b100 { + if mode != 0b00 && opcode >= 0b100 && opcode != 0b110 { return Err(DecodeError::InvalidOpcode); } @@ -5116,7 +5619,7 @@ impl Decoder<ARMv8> for InstDecoder { inst.operands = [ Operand::SIMDRegister(precision, Rn as u16), if opcode2 & 0b01000 != 0 { // and, sugguested, Rm == 0 - Operand::Immediate(0) + Operand::ImmediateDouble(0.0) } else { Operand::SIMDRegister(precision, Rm as u16) }, @@ -5674,6 +6177,8 @@ impl Decoder<ARMv8> for InstDecoder { ]; if [Opcode::FCMGE, Opcode::FCMLE, Opcode::FCMGT, Opcode::FCMEQ, Opcode::FCMLT].contains(&inst.opcode) { inst.operands[2] = Operand::ImmediateDouble(0.0); + } else if [Opcode::CMGE, Opcode::CMLE, Opcode::CMGT, Opcode::CMEQ, Opcode::CMLT].contains(&inst.opcode) { + inst.operands[2] = Operand::Immediate(0); } } else if op2 & 0b0111 == 0b110 { // `Advanced SIMD scalar pairwise` @@ -5734,18 +6239,18 @@ impl Decoder<ARMv8> for InstDecoder { 0b11011_0_0 => Ok(Opcode::FCVTMS), 0b11100_0_0 => Ok(Opcode::FCVTAS), 0b11101_0_0 => Ok(Opcode::SCVTF), - 0b01100_1_0 => Ok(Opcode::FCMGT), - 0b01101_1_0 => Ok(Opcode::FCMEQ), - 0b01110_1_0 => Ok(Opcode::FCMLT), - 0b11010_1_0 => Ok(Opcode::FCVTPS), - 0b11011_1_0 => Ok(Opcode::FCVTZS), - 0b11101_1_0 => Ok(Opcode::FRECPE), - 0b11111_1_0 => Ok(Opcode::FRECPX), - - 0b11010_0_1 => Ok(Opcode::FCVTNU), - 0b11011_0_1 => Ok(Opcode::FCVTMU), - 0b11100_0_1 => Ok(Opcode::FCVTAU), - 0b11101_0_1 => Ok(Opcode::UCVTF), + 0b01100_0_1 => Ok(Opcode::FCMGT), + 0b01101_0_1 => Ok(Opcode::FCMEQ), + 0b01110_0_1 => Ok(Opcode::FCMLT), + 0b11010_0_1 => Ok(Opcode::FCVTPS), + 0b11011_0_1 => Ok(Opcode::FCVTZS), + 0b11101_0_1 => Ok(Opcode::FRECPE), + 0b11111_0_1 => Ok(Opcode::FRECPX), + + 0b11010_1_0 => Ok(Opcode::FCVTNU), + 0b11011_1_0 => Ok(Opcode::FCVTMU), + 0b11100_1_0 => Ok(Opcode::FCVTAU), + 0b11101_1_0 => Ok(Opcode::UCVTF), 0b01100_1_1 => Ok(Opcode::FCMGE), 0b01101_1_1 => Ok(Opcode::FCMLE), 0b11010_1_1 => Ok(Opcode::FCVTPU), @@ -5799,33 +6304,6 @@ impl Decoder<ARMv8> for InstDecoder { Operand::Nothing, ]; } - } else if op2 & 0b0111 == 0b0101 && op0 == 0b0100 { - // `Cryptographic AES` - let Rd = word & 0b11111; - let Rn = (word >> 5) & 0b11111; - let opcode = (word >> 12) & 0b11111; - let size = (word >> 22) & 0b11; - - if size != 0b00 { - return Err(DecodeError::InvalidOpcode); - } - - let opcode = match opcode { - 0b00100 => Opcode::AESE, - 0b00101 => Opcode::AESD, - 0b00110 => Opcode::AESMC, - 0b00111 => Opcode::AESIMC, - _ => { - return Err(DecodeError::InvalidOpcode); - } - }; - inst.opcode = opcode; - inst.operands = [ - Operand::SIMDRegisterElements(SIMDSizeCode::Q, Rd as u16, SIMDSizeCode::B), - Operand::SIMDRegisterElements(SIMDSizeCode::Q, Rn as u16, SIMDSizeCode::B), - Operand::Nothing, - Operand::Nothing, - ]; } else { // unallocated return Err(DecodeError::InvalidOpcode); @@ -5834,11 +6312,51 @@ impl Decoder<ARMv8> for InstDecoder { } } else { // op2 == x0xx - if op3 & 0b000100001 == 0 { - // op3 == xxx0xxxx0, `Unallocated` - return Err(DecodeError::InvalidOpcode); - } - if op2 & 0b1000 == 0b1000 { + if op0 == 0b0101 && op2 & 0b0100 == 0b0000 && op3 & 0b000_100_011 == 0b000_000_000 { + // `Cryptographic three-register SHA` + let Rd = word & 0b11111; + let Rn = (word >> 5) & 0b11111; + let opcode_bits = (word >> 12) & 0b111; + let Rm = (word >> 16) & 0b11111; + let size = (word >> 22) & 0b11; + + if size != 0b00 { + return Err(DecodeError::InvalidOpcode); + } + + let (opcode, scalars) = &[ + Ok((Opcode::SHA1C, true)), + Ok((Opcode::SHA1P, true)), + Ok((Opcode::SHA1M, true)), + Ok((Opcode::SHA1SU0, false)), + Ok((Opcode::SHA256H, true)), + Ok((Opcode::SHA256H2, true)), + Ok((Opcode::SHA256SU1, false)), + Err(DecodeError::InvalidOpcode), + ][opcode_bits as usize]?; + + inst.opcode = *opcode; + if *scalars { + inst.operands = [ + Operand::SIMDRegister(SIMDSizeCode::Q, Rd as u16), + if opcode_bits < 0b100 { + // sha1 second reg is `Sn` + Operand::SIMDRegister(SIMDSizeCode::S, Rn as u16) + } else { + Operand::SIMDRegister(SIMDSizeCode::Q, Rn as u16) + }, + Operand::SIMDRegisterElements(SIMDSizeCode::Q, Rm as u16, SIMDSizeCode::S), + Operand::Nothing, + ]; + } else { + inst.operands = [ + Operand::SIMDRegisterElements(SIMDSizeCode::Q, Rd as u16, SIMDSizeCode::S), + Operand::SIMDRegisterElements(SIMDSizeCode::Q, Rn as u16, SIMDSizeCode::S), + Operand::SIMDRegisterElements(SIMDSizeCode::Q, Rm as u16, SIMDSizeCode::S), + Operand::Nothing, + ]; + } + } else if op0 & 0b1101 == 0b0101 && op2 & 0b1000 == 0b1000 && op3 & 0b000_110_001 == 0b000_000_001 { // op2 == 10xx // `Advanced SIMD scalar three same FP16` let Rd = word & 0b11111; @@ -5856,32 +6374,29 @@ impl Decoder<ARMv8> for InstDecoder { let index = (opcode << 2) | (U << 1) | a; inst.opcode = [ + // opcode == 0b011 Ok(Opcode::FMULX), - Ok(Opcode::FCMEQ), Err(DecodeError::InvalidOpcode), Err(DecodeError::InvalidOpcode), - // opcode == 0b111 - Ok(Opcode::FRECPS), Err(DecodeError::InvalidOpcode), + // opcode == 0b100 + Ok(Opcode::FCMEQ), Err(DecodeError::InvalidOpcode), + Ok(Opcode::FCMGE), Err(DecodeError::InvalidOpcode), - // opcode == 0b111 - Ok(Opcode::FRSQRTS), - Err(DecodeError::InvalidOpcode), - Err(DecodeError::InvalidOpcode), + // opcode == 0b101 Err(DecodeError::InvalidOpcode), Err(DecodeError::InvalidOpcode), - // opcode == 0b100 - Ok(Opcode::FCMGE), Ok(Opcode::FACGE), + Ok(Opcode::FACGT), + // opcode == 0b110 Err(DecodeError::InvalidOpcode), Err(DecodeError::InvalidOpcode), Err(DecodeError::InvalidOpcode), Err(DecodeError::InvalidOpcode), - Ok(Opcode::FABD), - Err(DecodeError::InvalidOpcode), - Ok(Opcode::FCMGT), - Ok(Opcode::FACGT), + // opcode == 0b111 + Ok(Opcode::FRECPS), + Ok(Opcode::FRSQRTS), Err(DecodeError::InvalidOpcode), Err(DecodeError::InvalidOpcode), ][index as usize]?; @@ -5892,7 +6407,8 @@ impl Decoder<ARMv8> for InstDecoder { Operand::SIMDRegister(SIMDSizeCode::H, Rm as u16), Operand::Nothing, ]; - } else { + } else if word & 0b1101_000_11_1100_000100001_0000000000 == 0b0101_000_00_0000_000000001_0000000000 { + // check op0, op1, op2, and op3 all at once because i am lazy // op2 == 00xx // `Advanced SIMD scalar copy` let imm4 = (word >> 11) & 0b1111; @@ -5932,6 +6448,39 @@ impl Decoder<ARMv8> for InstDecoder { } else { return Err(DecodeError::InvalidOpcode); } + } else if word & 0b1101_1111_0010_0000_1000_0100_0000_0000 == 0b0101_1110_0000_0000_1000_0100_0000_0000 { + // `Advanced SIMD scalar three same extra` + let Rd = (word >> 0) & 0b11111; + let Rn = (word >> 5) & 0b11111; + let Rm = (word >> 16) & 0b11111; + let opcode = (word >> 11) & 0b1111; + let size = (word >> 22) & 0b11; + let u = (word >> 29) & 1; + + if u == 0 || opcode > 0b0001 { + return Err(DecodeError::InvalidOpcode); + } + let size = if size == 0b01 { + SIMDSizeCode::H + } else if size == 0b10 { + SIMDSizeCode::S + } else { + return Err(DecodeError::InvalidOperand); + }; + + inst.opcode = if opcode == 0b0000 { + Opcode::SQRDMLAH + } else { + Opcode::SQRDMLSH + }; + inst.operands = [ + Operand::SIMDRegister(size, Rd as u16), + Operand::SIMDRegister(size, Rn as u16), + Operand::SIMDRegister(size, Rm as u16), + Operand::Nothing, + ]; + } else { + return Err(DecodeError::InvalidOpcode); } } } else { @@ -5967,12 +6516,12 @@ impl Decoder<ARMv8> for InstDecoder { Opcode::SQRDMLAH } else { Opcode::SQRDMULH - }, OperandKind::DifferentSizes) + }, OperandKind::SameSizes) } 0b1111_0 => (Opcode::SQRDMLSH, OperandKind::DifferentSizes), 0b1001_1 => (Opcode::FMULX, OperandKind::SameSizes), - 0b1101_1 => (Opcode::SQRDMLAH, OperandKind::DifferentSizes), - 0b1111_1 => (Opcode::SQRDMLSH, OperandKind::DifferentSizes), + 0b1101_1 => (Opcode::SQRDMLAH, OperandKind::SameSizes), + 0b1111_1 => (Opcode::SQRDMLSH, OperandKind::SameSizes), _ => { return Err(DecodeError::InvalidOpcode); } @@ -5991,22 +6540,21 @@ impl Decoder<ARMv8> for InstDecoder { _ => SIMDSizeCode::D, }; - let index = match size { + let (Rm, index) = match size { SIMDSizeCode::H => { - (H << 2) | (L << 1) | M + (Rm, (H << 2) | (L << 1) | M) }, SIMDSizeCode::S => { - (H << 1) | L + (Rm | (M << 4), (H << 1) | L) } _ => { /* SIMDSizeCode::D */ if L != 0 { return Err(DecodeError::InvalidOperand); } - H + (Rm | (M << 4), H) } }; - let Rm = (M << 4) | Rm; inst.operands = [ Operand::SIMDRegister(size, Rd as u16), @@ -6366,9 +6914,46 @@ impl Decoder<ARMv8> for InstDecoder { let opc2 = ((word >> 10) & 0x3f) as u16; let Rm = ((word >> 16) & 0x1f) as u16; - if opc2 == 0b000000 { - inst.opcode = Opcode::Invalid; - return Err(DecodeError::InvalidOperand); + if opc2 != 0b000000 { + if opc2 & 0b011111 == 0b000001 { + // `Rotate right into flags` + if word & 0xe0_00_00_10 != 0xa0_00_00_00 { + return Err(DecodeError::InvalidOperand); + } + let mask = (word >> 0) & 0xf; + let imm6 = (word >> 15) & 0x3f; + + inst.opcode = Opcode::RMIF; + inst.operands = [ + Operand::Register(SizeCode::X, Rn), + Operand::Imm16(imm6 as u16), + Operand::Imm16(mask as u16), + Operand::Nothing, + ]; + return Ok(()); + } else if opc2 & 0b001111 == 0b000010 { + // `Evaluate into flags` + let sz = (word >> 14) & 1; + if word & 0b1111_1111_1111_1111_1011_1100_0001_1111 != + 0b0011_1010_0000_0000_0000_1000_0000_1101 { + return Err(DecodeError::InvalidOperand); + } + inst.opcode = if sz == 0 { + Opcode::SETF8 + } else { + Opcode::SETF16 + }; + inst.operands = [ + Operand::Register(SizeCode::W, Rn), + Operand::Nothing, + Operand::Nothing, + Operand::Nothing, + ]; + return Ok(()); + } else { + inst.opcode = Opcode::Invalid; + return Err(DecodeError::InvalidOperand); + } } let size_code = match word >> 29 { @@ -6591,25 +7176,25 @@ impl Decoder<ARMv8> for InstDecoder { Err(DecodeError::InvalidOpcode), Err(DecodeError::InvalidOpcode), // opcode = 0b01_0000 - Ok((Opcode::CRC32B, SizeCode::X)), + Ok((Opcode::CRC32B, SizeCode::W)), Err(DecodeError::InvalidOpcode), // opcode = 0b01_0001 - Ok((Opcode::CRC32H, SizeCode::X)), + Ok((Opcode::CRC32H, SizeCode::W)), Err(DecodeError::InvalidOpcode), // opcode = 0b01_0010 - Ok((Opcode::CRC32W, SizeCode::X)), + Ok((Opcode::CRC32W, SizeCode::W)), Err(DecodeError::InvalidOpcode), // opcode = 0b01_0011 Err(DecodeError::InvalidOpcode), Ok((Opcode::CRC32X, SizeCode::X)), // opcode = 0b01_0100 - Ok((Opcode::CRC32CB, SizeCode::X)), + Ok((Opcode::CRC32CB, SizeCode::W)), Err(DecodeError::InvalidOpcode), // opcode = 0b01_0101 - Ok((Opcode::CRC32CH, SizeCode::X)), + Ok((Opcode::CRC32CH, SizeCode::W)), Err(DecodeError::InvalidOpcode), // opcode = 0b01_0110 - Ok((Opcode::CRC32CW, SizeCode::X)), + Ok((Opcode::CRC32CW, SizeCode::W)), Err(DecodeError::InvalidOpcode), // opcode = 0b01_0111 Err(DecodeError::InvalidOpcode), @@ -6618,8 +7203,17 @@ impl Decoder<ARMv8> for InstDecoder { let (opcode, size) = OPCODES.get(combined_idx as usize).cloned().unwrap_or(Err(DecodeError::InvalidOpcode))?; inst.opcode = opcode; inst.operands = [ - Operand::Register(size, Rd), - Operand::Register(size, Rn), + // `crc32` instructions always have w-reg dest/source1 operands + if combined_idx > 0b01_0000_0 { + Operand::Register(SizeCode::W, Rd) + } else { + Operand::Register(SizeCode::X, Rd) + }, + if combined_idx > 0b01_0000_0 { + Operand::Register(SizeCode::W, Rn) + } else { + Operand::Register(SizeCode::X, Rn) + }, Operand::Register(size, Rm), Operand::Nothing, ]; @@ -6735,7 +7329,7 @@ impl Decoder<ARMv8> for InstDecoder { Err(DecodeError::InvalidOpcode), Ok((Opcode::SMSUBL, SizeCode::W, SizeCode::X)), Err(DecodeError::InvalidOpcode), - Ok((Opcode::SMULH, SizeCode::W, SizeCode::X)), + Ok((Opcode::SMULH, SizeCode::X, SizeCode::X)), Err(DecodeError::InvalidOpcode), Err(DecodeError::InvalidOpcode), Err(DecodeError::InvalidOpcode), @@ -6765,7 +7359,12 @@ impl Decoder<ARMv8> for InstDecoder { Operand::Register(dest_size, Rd), Operand::Register(source_size, Rn), Operand::Register(source_size, Rm), - Operand::Register(dest_size, Ra), // in practice these match up with the corresponding operand. + if opcode == Opcode::SMULH { + Operand::Nothing + } else { + // in practice these match up with the corresponding operand. + Operand::Register(dest_size, Ra) + }, ]; if opcode == Opcode::UMULH { inst.operands[3] = Operand::Nothing; @@ -6838,8 +7437,19 @@ impl Decoder<ARMv8> for InstDecoder { let option = (word >> 13) & 0x07; let Rm = ((word >> 16) & 0x1f) as u16; - inst.operands[0] = Operand::RegisterOrSP(size, Rd); - inst.operands[1] = Operand::RegisterOrSP(size, Rn); + // for `extended register` instructions, sometimes the dest is Rd, + // sometimes it's <Rd|xSP>. this depends on if the instruction sets + // status flags. + inst.operands = [ + if (word >> 29 & 1) == 0 { + Operand::RegisterOrSP(size, Rd) + } else { + Operand::Register(size, Rd) + }, + Operand::RegisterOrSP(size, Rn), + Operand::Nothing, + Operand::Nothing, + ]; let shift_size = match option { 0b011 | @@ -7049,7 +7659,11 @@ impl Decoder<ARMv8> for InstDecoder { }; inst.operands = [ - Operand::RegisterOrSP(size, Rd), + if (word >> 29 & 0b11) == 0b11 { + Operand::Register(size, Rd) + } else { + Operand::RegisterOrSP(size, Rd) + }, Operand::Register(size, Rn), match size { SizeCode::W => Operand::Immediate(docs::DecodeBitMasks_32(N as u8, imms as u8, immr as u8)?.0), @@ -7648,6 +8262,12 @@ impl Decoder<ARMv8> for InstDecoder { let (opcode, size) = ENCODINGS[opc_L as usize]?; inst.opcode = opcode; + let scale = if size == SizeCode::W { + 2 + } else { + 3 + }; + let Rt = (word & 0x1f) as u16; let Rn = ((word >> 5) & 0x1f) as u16; let Rt2 = ((word >> 10) & 0x1f) as u16; @@ -7657,7 +8277,7 @@ impl Decoder<ARMv8> for InstDecoder { inst.operands = [ Operand::Register(size, Rt), Operand::Register(size, Rt2), - Operand::RegPreIndex(Rn, imm7 as i32, true), + Operand::RegPreIndex(Rn, (imm7 as i32) << scale, false), Operand::Nothing, ]; }, @@ -7679,6 +8299,14 @@ impl Decoder<ARMv8> for InstDecoder { let (opcode, size) = ENCODINGS[opc_L as usize]?; inst.opcode = opcode; + let scale = if size == SIMDSizeCode::S { + 2 + } else if size == SIMDSizeCode::D { + 3 + } else { + 4 + }; + let Rt = (word & 0x1f) as u16; let Rn = ((word >> 5) & 0x1f) as u16; let Rt2 = ((word >> 10) & 0x1f) as u16; @@ -7688,7 +8316,7 @@ impl Decoder<ARMv8> for InstDecoder { inst.operands = [ Operand::SIMDRegister(size, Rt), Operand::SIMDRegister(size, Rt2), - Operand::RegPreIndex(Rn, imm7 as i32, true), + Operand::RegPreIndex(Rn, (imm7 as i32) << scale, false), Operand::Nothing, ]; }, @@ -8104,13 +8732,16 @@ impl Decoder<ARMv8> for InstDecoder { Operand::Nothing, ]; } else if opcode == 0b100 { + if ar != 0b10 { + return Err(DecodeError::InvalidOpcode); + } inst.opcode = if sz == 0b01 { - Opcode::LDAPRH(ar) + Opcode::LDAPRH } else if sz == 0b00 { - return Err(DecodeError::InvalidOpcode); + Opcode::LDAPRB } else { // sz = 1x - Opcode::LDAPRH(ar) + Opcode::LDAPR }; // TOOD: should_is_must, Rs = 11111 @@ -8159,10 +8790,10 @@ impl Decoder<ARMv8> for InstDecoder { // Load/store register (register offset) // C3.3.10 const OPCODES: &[Result<(Opcode, SizeCode, u8), DecodeError>] = &[ - Ok((Opcode::STRB, SizeCode::W, 1)), - Ok((Opcode::LDRB, SizeCode::W, 1)), - Ok((Opcode::LDRSB, SizeCode::X, 1)), - Ok((Opcode::LDRSB, SizeCode::W, 1)), + Ok((Opcode::STRB, SizeCode::W, 0)), + Ok((Opcode::LDRB, SizeCode::W, 0)), + Ok((Opcode::LDRSB, SizeCode::X, 0)), + Ok((Opcode::LDRSB, SizeCode::W, 0)), Ok((Opcode::STRH, SizeCode::W, 1)), Ok((Opcode::LDRH, SizeCode::W, 1)), Ok((Opcode::LDRSH, SizeCode::X, 1)), @@ -8286,7 +8917,7 @@ impl Decoder<ARMv8> for InstDecoder { inst.operands = [ Operand::Register(size, Rt), - Operand::RegPreIndex(Rn, imm9 as i32, true), + Operand::RegPreIndex(Rn, imm9 as i32, false), Operand::Nothing, Operand::Nothing, ]; @@ -8491,7 +9122,7 @@ impl Decoder<ARMv8> for InstDecoder { let (opcode, size) = OPCODES.get(size_opc as usize).cloned().unwrap_or(Err(DecodeError::InvalidOpcode))?; let shift_amount = match size { - SIMDSizeCode::B => 1, + SIMDSizeCode::B => 0, SIMDSizeCode::H => 1, SIMDSizeCode::S => 2, SIMDSizeCode::D => 3, @@ -8786,7 +9417,7 @@ impl Decoder<ARMv8> for InstDecoder { ]; inst.operands = [ Operand::SIMDRegisterGroup(datasize, Rt as u16, SIZES[size as usize], num_regs), - Operand::RegPostIndex(Rn as u16, 0), + Operand::RegOffset(Rn as u16, 0), Operand::Nothing, Operand::Nothing, ]; @@ -8917,7 +9548,7 @@ impl Decoder<ARMv8> for InstDecoder { ]; inst.operands = [ Operand::SIMDRegisterGroup(datasize, Rt as u16, SIZES[size as usize], opc_idx as u8 + 1), - Operand::RegPostIndex(Rn as u16, 0), + Operand::RegOffset(Rn as u16, 0), Operand::Nothing, Operand::Nothing, ]; @@ -8981,7 +9612,7 @@ impl Decoder<ARMv8> for InstDecoder { }; inst.operands = [ Operand::SIMDRegisterGroupLane(Rt as u16, item_size, group_size, index as u8), - Operand::RegPostIndex(Rn as u16, 0), + Operand::RegOffset(Rn as u16, 0), Operand::Nothing, Operand::Nothing, ]; 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