diff options
| author | iximeow <me@iximeow.net> | 2019-11-28 02:21:34 -0800 |
|---|---|---|
| committer | iximeow <me@iximeow.net> | 2020-01-12 17:29:01 -0800 |
| commit | 179d5d9cb7e94851ba69bf67f6d2dfbafa6aa6fe (patch) | |
| tree | af40c09afea071cf75aec2680e8ca7661267bce2 /src | |
| parent | a2aaf35628135974a57dc2e09fb2d71eab2c35e5 (diff) | |
update arm to revised decoder trait
Diffstat (limited to 'src')
| -rw-r--r-- | src/armv7.rs | 210 | ||||
| -rw-r--r-- | src/armv8/a64.rs | 997 |
2 files changed, 740 insertions, 467 deletions
diff --git a/src/armv7.rs b/src/armv7.rs index 9fe6fea..7d13c89 100644 --- a/src/armv7.rs +++ b/src/armv7.rs @@ -3,7 +3,7 @@ use std::fmt::{Display, Formatter}; -use yaxpeax_arch::{Arch, Colorize, Colored, ColorSettings, Decodable, LengthedInstruction, ShowContextual, YaxColors}; +use yaxpeax_arch::{Arch, Colorize, Colored, ColorSettings, Decoder, LengthedInstruction, ShowContextual, YaxColors}; struct ConditionedOpcode(pub Opcode, pub ConditionCode); @@ -668,16 +668,19 @@ impl ConditionCode { } } +#[derive(Default, Debug)] +pub struct InstDecoder {} + #[allow(non_snake_case)] -impl Decodable for Instruction { - fn decode<T: IntoIterator<Item=u8>>(bytes: T) -> Option<Self> { +impl Decoder<Instruction> for InstDecoder { + fn decode<T: IntoIterator<Item=u8>>(&self, bytes: T) -> Option<Instruction> { let mut blank = Instruction::blank(); - match blank.decode_into(bytes) { + match self.decode_into(&mut blank, bytes) { Some(_) => Some(blank), None => None } } - fn decode_into<T: IntoIterator<Item=u8>>(&mut self, bytes: T) -> Option<()> { + fn decode_into<T: IntoIterator<Item=u8>>(&self, inst: &mut Instruction, bytes: T) -> Option<()> { fn read_word<T: IntoIterator<Item=u8>>(bytes: T) -> Option<u32> { let mut iter = bytes.into_iter(); let instr: u32 = @@ -704,38 +707,38 @@ impl Decodable for Instruction { if cond == 0b1111 { // do unconditional instruction stuff - self.condition = ConditionCode::AL; + inst.condition = ConditionCode::AL; let op1 = (word >> 20) as u8; if op1 > 0x80 { match (op1 >> 5) & 0b11 { 0b00 => { - self.opcode = Opcode::Incomplete(word); + inst.opcode = Opcode::Incomplete(word); } 0b01 => { - self.opcode = Opcode::BLX; + inst.opcode = Opcode::BLX; let operand = ((word & 0xffffff) as i32) << 8 >> 6; - self.operands = Operands::BranchOffset( + inst.operands = Operands::BranchOffset( operand | ( ((word >> 23) & 0b10) as i32 ) ); } 0b10 => { - self.opcode = Opcode::Incomplete(word); + inst.opcode = Opcode::Incomplete(word); } 0b11 => { - self.opcode = Opcode::Incomplete(word); + inst.opcode = Opcode::Incomplete(word); } _ => { unreachable!(); } } } else { - self.opcode = Opcode::Incomplete(word); + inst.opcode = Opcode::Incomplete(word); } return Some(()); } else { - self.condition = ConditionCode::build(cond); + inst.condition = ConditionCode::build(cond); } // distinction at this point is on page A5-192 @@ -768,47 +771,47 @@ impl Decodable for Instruction { ((word >> 12) & 0x0f) as u8, ((word >> 16) & 0x0f) as u8 ]; - self.set_S(s); + inst.set_S(s); match op { 0b000 => { - self.opcode = Opcode::MUL; - self.operands = Operands::MulThreeRegs(R[3], R[0], R[1]); + inst.opcode = Opcode::MUL; + inst.operands = Operands::MulThreeRegs(R[3], R[0], R[1]); }, 0b001 => { - self.opcode = Opcode::MLA; - self.operands = Operands::MulFourRegs(R[3], R[0], R[1], R[2]); + inst.opcode = Opcode::MLA; + inst.operands = Operands::MulFourRegs(R[3], R[0], R[1], R[2]); }, 0b010 => { if s { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; return None; } - self.opcode = Opcode::UMAAL; - self.operands = Operands::MulFourRegs(R[2], R[3], R[0], R[1]); + inst.opcode = Opcode::UMAAL; + inst.operands = Operands::MulFourRegs(R[2], R[3], R[0], R[1]); }, 0b011 => { if s { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; return None; } - self.opcode = Opcode::MLS; - self.operands = Operands::MulFourRegs(R[3], R[0], R[1], R[2]); + inst.opcode = Opcode::MLS; + inst.operands = Operands::MulFourRegs(R[3], R[0], R[1], R[2]); } 0b100 => { - self.opcode = Opcode::UMULL; - self.operands = Operands::MulFourRegs(R[2], R[3], R[0], R[1]); + inst.opcode = Opcode::UMULL; + inst.operands = Operands::MulFourRegs(R[2], R[3], R[0], R[1]); } 0b101 => { - self.opcode = Opcode::UMLAL; - self.operands = Operands::MulFourRegs(R[2], R[3], R[0], R[1]); + inst.opcode = Opcode::UMLAL; + inst.operands = Operands::MulFourRegs(R[2], R[3], R[0], R[1]); } 0b110 => { - self.opcode = Opcode::SMULL; - self.operands = Operands::MulFourRegs(R[2], R[3], R[0], R[1]); + inst.opcode = Opcode::SMULL; + inst.operands = Operands::MulFourRegs(R[2], R[3], R[0], R[1]); } 0b111 => { - self.opcode = Opcode::SMLAL; - self.operands = Operands::MulFourRegs(R[2], R[3], R[0], R[1]); + inst.opcode = Opcode::SMLAL; + inst.operands = Operands::MulFourRegs(R[2], R[3], R[0], R[1]); } _ => { unreachable!(format!("mul upcode: {:x}", op)) } } @@ -838,52 +841,52 @@ impl Decodable for Instruction { // this is swp or {ld,st}ex, conditional on bit 23 match flags { 0b10000 => { - self.opcode = Opcode::SWP; - self.operands = Operands::ThreeOperand(Rn, Rd, LoOffset); + inst.opcode = Opcode::SWP; + inst.operands = Operands::ThreeOperand(Rn, Rd, LoOffset); }, 0b10001 | 0b10010 | 0b10011 => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; return None; } 0b10100 => { - self.opcode = Opcode::SWPB; - self.operands = Operands::ThreeOperand(Rn, Rd, LoOffset); + inst.opcode = Opcode::SWPB; + inst.operands = Operands::ThreeOperand(Rn, Rd, LoOffset); }, 0b10101 | 0b10110 | 0b10111 => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; return None; } 0b11000 => { - self.opcode = Opcode::STREX; - self.operands = Operands::ThreeOperand(Rn, Rd, LoOffset); + inst.opcode = Opcode::STREX; + inst.operands = Operands::ThreeOperand(Rn, Rd, LoOffset); } 0b11001 => { - self.opcode = Opcode::LDREX; - self.operands = Operands::ThreeOperand(Rn, Rd, LoOffset); + inst.opcode = Opcode::LDREX; + inst.operands = Operands::ThreeOperand(Rn, Rd, LoOffset); } 0b11010 => { - self.opcode = Opcode::STREXD; - self.operands = Operands::ThreeOperand(Rn, Rd, LoOffset); + inst.opcode = Opcode::STREXD; + inst.operands = Operands::ThreeOperand(Rn, Rd, LoOffset); } 0b11011 => { - self.opcode = Opcode::LDREXD; - self.operands = Operands::ThreeOperand(Rn, Rd, LoOffset); + inst.opcode = Opcode::LDREXD; + inst.operands = Operands::ThreeOperand(Rn, Rd, LoOffset); } 0b11100 => { - self.opcode = Opcode::STREXB; - self.operands = Operands::ThreeOperand(Rn, Rd, LoOffset); + inst.opcode = Opcode::STREXB; + inst.operands = Operands::ThreeOperand(Rn, Rd, LoOffset); } 0b11101 => { - self.opcode = Opcode::LDREXB; - self.operands = Operands::ThreeOperand(Rn, Rd, LoOffset); + inst.opcode = Opcode::LDREXB; + inst.operands = Operands::ThreeOperand(Rn, Rd, LoOffset); } 0b11110 => { - self.opcode = Opcode::STREXH; - self.operands = Operands::ThreeOperand(Rn, Rd, LoOffset); + inst.opcode = Opcode::STREXH; + inst.operands = Operands::ThreeOperand(Rn, Rd, LoOffset); } 0b11111 => { - self.opcode = Opcode::LDREXH; - self.operands = Operands::ThreeOperand(Rn, Rd, LoOffset); + inst.opcode = Opcode::LDREXH; + inst.operands = Operands::ThreeOperand(Rn, Rd, LoOffset); } _ => { /* @@ -900,30 +903,30 @@ impl Decodable for Instruction { 0b01 => { // |c o n d|0 0 0 x|x x x x x x x x x x x x x x x x|1 0 1 1|x x x x| // page A5-201 - self.opcode = Opcode::Incomplete(word); + inst.opcode = Opcode::Incomplete(word); // return Some(()); match flags { 0b00010 => { - // self.opcode = Opcode::STRHT_sub; - self.opcode = Opcode::Incomplete(word); - self.operands = Operands::ThreeOperand(Rn, Rd, LoOffset); + // inst.opcode = Opcode::STRHT_sub; + inst.opcode = Opcode::Incomplete(word); + inst.operands = Operands::ThreeOperand(Rn, Rd, LoOffset); } 0b01010 => { - // self.opcode = Opcode::STRHT_add; - self.opcode = Opcode::Incomplete(word); - self.operands = Operands::ThreeOperand(Rn, Rd, LoOffset); + // inst.opcode = Opcode::STRHT_add; + inst.opcode = Opcode::Incomplete(word); + inst.operands = Operands::ThreeOperand(Rn, Rd, LoOffset); } 0b00110 => { - // self.opcode = Opcode::STRHT_sub; - self.opcode = Opcode::Incomplete(word); + // inst.opcode = Opcode::STRHT_sub; + inst.opcode = Opcode::Incomplete(word); let imm = (HiOffset << 4) as u16 | LoOffset as u16; - self.operands = Operands::ThreeOperandImm(Rn, Rd, imm); + inst.operands = Operands::ThreeOperandImm(Rn, Rd, imm); } 0b01110 => { - // self.opcode = Opcode::STRHT_add; - self.opcode = Opcode::Incomplete(word); + // inst.opcode = Opcode::STRHT_add; + inst.opcode = Opcode::Incomplete(word); let imm = (HiOffset << 4) as u16 | LoOffset as u16; - self.operands = Operands::ThreeOperandImm(Rn, Rd, imm); + inst.operands = Operands::ThreeOperandImm(Rn, Rd, imm); } _ => { unreachable!(); @@ -934,13 +937,13 @@ impl Decodable for Instruction { 0b10 => { // |c o n d|0 0 0 x|x x x x x x x x x x x x x x x x|1 1 0 1|x x x x| // page A5-201 - self.opcode = Opcode::Incomplete(word); + inst.opcode = Opcode::Incomplete(word); return Some(()); } 0b11 => { // |c o n d|0 0 0 x|x x x x x x x x x x x x x x x x|1 1 1 1|x x x x| // page A5-201 - self.opcode = Opcode::Incomplete(word); + inst.opcode = Opcode::Incomplete(word); return Some(()); } _ => { unreachable!(); } @@ -970,15 +973,15 @@ impl Decodable for Instruction { }, 0b011 => { if opcode & 0b11 == 0b01 { - self.opcode = Opcode::BLX; - self.operands = Operands::OneOperand((word & 0x0f) as u8); + inst.opcode = Opcode::BLX; + inst.operands = Operands::OneOperand((word & 0x0f) as u8); return Some(()); } else { return None; } }, 0b100 => { - self.opcode = Opcode::Incomplete(word); + inst.opcode = Opcode::Incomplete(word); return Some(()); }, 0b101 => { @@ -996,15 +999,15 @@ impl Decodable for Instruction { } else { // |c o n d|0 0 0|1 0 x x|0|x x x x|x x x x|x x x x|1|x x|x|x x x x| // multiply and multiply-accumulate - self.opcode = Opcode::Incomplete(word); + inst.opcode = Opcode::Incomplete(word); return Some(()); } } else { if opcode >= 16 { unreachable!(); } - self.opcode = DATA_PROCESSING_OPCODES[opcode as usize]; - self.set_S(s); + inst.opcode = DATA_PROCESSING_OPCODES[opcode as usize]; + inst.set_S(s); // at this point we know this is a data processing instruction // either immediate shift or register shift @@ -1025,15 +1028,15 @@ impl Decodable for Instruction { if shift_spec == 0 { if (0b1101 & opcode) == 0b1101 { // MOV or MVN - self.operands = Operands::TwoOperand(Rd, Rm); + inst.operands = Operands::TwoOperand(Rd, Rm); } else { - self.operands = Operands::ThreeOperand(Rd, Rn, Rm); + inst.operands = Operands::ThreeOperand(Rd, Rn, Rm); } } else { /* * TODO: look at how this interacts with mov and mvn */ - self.operands = Operands::ThreeOperandWithShift(Rd, Rn, Rm, ShiftSpec::Immediate(shift_spec)); + inst.operands = Operands::ThreeOperandWithShift(Rd, Rn, Rm, ShiftSpec::Immediate(shift_spec)); } } else { // known 0 because it and bit 5 are not both 1 --v @@ -1053,10 +1056,10 @@ impl Decodable for Instruction { // here? if (0b1101 & opcode) == 0b1101 { // these are all invalid - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; return None; } else { - self.operands = Operands::ThreeOperandWithShift(Rd, Rn, Rm, ShiftSpec::Register(shift_spec)); + inst.operands = Operands::ThreeOperandWithShift(Rd, Rn, Rm, ShiftSpec::Register(shift_spec)); } } } @@ -1077,14 +1080,14 @@ impl Decodable for Instruction { // the instruction looks like // |c o n d|0 0 0|1 0 x x|0|x x x x|x x x x|x x x x x|x x|x|x x x x| // misc instructions (page A5-194) - self.opcode = Opcode::Incomplete(word); + inst.opcode = Opcode::Incomplete(word); return Some(()); } else { if opcode >= 16 { unreachable!(); } - self.opcode = DATA_PROCESSING_OPCODES[opcode as usize]; - self.set_S(s); + inst.opcode = DATA_PROCESSING_OPCODES[opcode as usize]; + inst.set_S(s); let (Rn, imm) = { let imm = word & 0x0000ffff; @@ -1092,17 +1095,17 @@ impl Decodable for Instruction { ((word & 0x0f) as u8, imm) }; if (opcode == 0b0010 || opcode == 0b0100) && Rn == 0b1111 { - self.opcode = Opcode::ADR; + inst.opcode = Opcode::ADR; } match opcode { 0b1101 => { - self.operands = Operands::RegImm( + inst.operands = Operands::RegImm( ((word >> 12) & 0xf) as u8, (word & 0x0fff) as u32 ); } _ => { - self.operands = Operands::RegImm(Rn, imm); + inst.operands = Operands::RegImm(Rn, imm); } } @@ -1125,7 +1128,7 @@ impl Decodable for Instruction { 0x110 -> STRBT 0x111 -> LDRBT */ - self.opcode = match op { + inst.opcode = match op { 0b010 => Opcode::STRT(add), 0b011 => Opcode::LDRT(add), 0b110 => Opcode::STRBT(add), @@ -1142,12 +1145,12 @@ impl Decodable for Instruction { let pre = (op & 0b10000) != 0; let wback = (op & 0b00010) != 0; let op = op & 0b00101; - self.opcode = match op { + inst.opcode = match op { 0b000 => Opcode::STR(add, pre, wback), 0b001 => { if Rn == 0b1111 { - self.operands = Operands::RegImm(Rt, imm.into()); - self.opcode = Opcode::LDR(add, pre, wback); + inst.operands = Operands::RegImm(Rt, imm.into()); + inst.opcode = Opcode::LDR(add, pre, wback); return Some(()); } Opcode::LDR(add, pre, wback) @@ -1155,8 +1158,8 @@ impl Decodable for Instruction { 0b100 => Opcode::STRB(add, pre, wback), 0b101 => { if Rn == 0b1111 { - self.operands = Operands::RegImm(Rt, imm.into()); - self.opcode = Opcode::LDRB(add, pre, wback); + inst.operands = Operands::RegImm(Rt, imm.into()); + inst.opcode = Opcode::LDRB(add, pre, wback); return Some(()); } Opcode::LDRB(add, pre, wback) @@ -1164,7 +1167,7 @@ impl Decodable for Instruction { _ => { unreachable!(); } }; } - self.operands = Operands::TwoRegImm(Rn, Rt, imm.into()); + inst.operands = Operands::TwoRegImm(Rn, Rt, imm.into()); }, 0b011 => { // page A5-192 to distinguish the following: @@ -1199,7 +1202,7 @@ impl Decodable for Instruction { 0x110 -> STRBT 0x111 -> LDRBT */ - self.opcode = match op { + inst.opcode = match op { 0b010 => Opcode::STRT(add), 0b011 => Opcode::LDRT(add), 0b110 => Opcode::STRBT(add), @@ -1216,7 +1219,7 @@ impl Decodable for Instruction { let pre = (op & 0b10000) != 0; let wback = (op & 0b00010) != 0; let op = op & 0b00101; - self.opcode = match op { + inst.opcode = match op { 0b000 => Opcode::STR(add, pre, wback), 0b001 => Opcode::LDR(add, pre, wback), 0b100 => Opcode::STRB(add, pre, wback), @@ -1232,7 +1235,7 @@ impl Decodable for Instruction { let Rt = (word & 0xf) as u8; (Rt, Rm, shift) }; - self.operands = Operands::ThreeOperandWithShift(Rn, Rt, Rm, ShiftSpec::Immediate(shift)); + inst.operands = Operands::ThreeOperandWithShift(Rn, Rt, Rm, ShiftSpec::Immediate(shift)); } return Some(()); }, @@ -1245,31 +1248,31 @@ impl Decodable for Instruction { let add = (op & 0b001000) != 0; let pre = (op & 0b010000) != 0; let usermode = (op & 0b000100) != 0; - self.opcode = if (op & 1) == 0 { + inst.opcode = if (op & 1) == 0 { Opcode::STM(add, pre, wback, usermode) } else { Opcode::LDM(add, pre, wback, usermode) }; - self.operands = Operands::RegRegList( + inst.operands = Operands::RegRegList( ((word >> 16) & 0xf) as u8, (word & 0xffff) as u16 ); } else if op < 0b110000 { // 10xxxx // the + 1 is to compensate for an architecturally-defined initial offset - self.opcode = Opcode::B; - self.operands = Operands::BranchOffset(((word & 0x00ffff) + 1) as i16 as i32); + inst.opcode = Opcode::B; + inst.operands = Operands::BranchOffset(((word & 0x00ffff) + 1) as i16 as i32); } else { // 11xxxx // the + 1 is to compensate for an architecturally-defined initial offset - self.opcode = Opcode::BL; - self.operands = Operands::BranchOffset(((word & 0x00ffff) + 1) as i16 as i32); + inst.opcode = Opcode::BL; + inst.operands = Operands::BranchOffset(((word & 0x00ffff) + 1) as i16 as i32); } }, 0b110 | 0b111 => { // coprocessor instructions and supervisor call // page A5-213 - self.opcode = Opcode::Incomplete(word); + inst.opcode = Opcode::Incomplete(word); return Some(()); }, _ => { unreachable!(); } @@ -1289,6 +1292,7 @@ pub struct ARMv7; impl Arch for ARMv7 { type Address = u32; type Instruction = Instruction; + type Decoder = InstDecoder; type Operand = Operands; } diff --git a/src/armv8/a64.rs b/src/armv8/a64.rs index 3e0403a..6dd9d68 100644 --- a/src/armv8/a64.rs +++ b/src/armv8/a64.rs @@ -3,7 +3,7 @@ use std::fmt::{Display, Formatter}; -use yaxpeax_arch::{Arch, ColorSettings, Decodable, LengthedInstruction, ShowContextual}; +use yaxpeax_arch::{Arch, ColorSettings, Decoder, LengthedInstruction, ShowContextual}; #[allow(non_snake_case)] mod docs { @@ -114,6 +114,16 @@ mod docs { let tmask = Replicate(telem, esize, 64); (wmask, tmask) } + + pub fn DecodeShift(op: u8) -> super::ShiftStyle { + assert!(op <= 0b11); + [ + super::ShiftStyle::LSL, + super::ShiftStyle::LSR, + super::ShiftStyle::ASR, + super::ShiftStyle::ROR, + ][op as usize] + } } #[allow(non_snake_case)] @@ -134,13 +144,20 @@ pub struct ARMv8 { } impl Arch for ARMv8 { type Address = u64; type Instruction = Instruction; + type Decoder = InstDecoder; type Operand = Operand; } #[derive(Copy, Clone, Debug, PartialEq)] +#[repr(u8)] pub enum SizeCode { X, W } #[derive(Copy, Clone, Debug, PartialEq)] +#[repr(u8)] +pub enum SIMDSizeCode { S, D, Q } + +#[derive(Copy, Clone, Debug, PartialEq)] +#[repr(C)] pub struct Instruction { pub opcode: Opcode, pub operands: [Operand; 4], @@ -176,16 +193,38 @@ impl Display for Instruction { Opcode::AND => { write!(fmt, "and")?; }, + Opcode::BIC => { + write!(fmt, "bic")?; + }, + Opcode::BICS => { + write!(fmt, "bics")?; + }, Opcode::ORR => { + 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)); + } + } write!(fmt, "orr")?; }, + Opcode::ORN => { + write!(fmt, "orn")?; + }, Opcode::EOR => { write!(fmt, "eor")?; }, + Opcode::EON => { + write!(fmt, "eon")?; + }, Opcode::ANDS => { write!(fmt, "ands")?; }, Opcode::ADDS => { + if let Operand::Register(SizeCode::X, 31) = self.operands[0] { + return write!(fmt, "cmn {}, {}", self.operands[1], self.operands[2]); + } write!(fmt, "adds")?; }, Opcode::ADD => { @@ -536,6 +575,12 @@ impl Display for Instruction { } write!(fmt, "csinv")?; } + Opcode::PACIA => { + write!(fmt, "pacia")?; + } + Opcode::PACIZA => { + write!(fmt, "paciza")?; + } }; if self.operands[0] != Operand::Nothing { @@ -582,6 +627,7 @@ impl Instruction { } #[derive(Copy, Clone, Debug, PartialEq)] +#[repr(u8)] pub enum Opcode { Invalid, MOVN, @@ -593,7 +639,11 @@ pub enum Opcode { SBCS, AND, ORR, + ORN, EOR, + EON, + BIC, + BICS, ANDS, ADDS, ADD, @@ -692,6 +742,8 @@ pub enum Opcode { CSNEG, CSINC, CSINV, + PACIA, + PACIZA, } #[derive(Copy, Clone, Debug, PartialEq)] @@ -699,6 +751,7 @@ pub enum ShiftStyle { LSL, LSR, ASR, + ROR, UXTB, UXTH, UXTW, @@ -715,6 +768,7 @@ impl Display for ShiftStyle { ShiftStyle::LSL => { write!(fmt, "lsl") }, ShiftStyle::LSR => { write!(fmt, "lsr") }, ShiftStyle::ASR => { write!(fmt, "asr") }, + ShiftStyle::ROR => { write!(fmt, "ror") }, ShiftStyle::UXTB => { write!(fmt, "uxtb") }, ShiftStyle::UXTH => { write!(fmt, "uxth") }, ShiftStyle::UXTW => { write!(fmt, "uxtw") }, @@ -728,9 +782,11 @@ impl Display for ShiftStyle { } #[derive(Copy, Clone, Debug, PartialEq)] +#[repr(C)] pub enum Operand { Nothing, Register(SizeCode, u16), + SIMDRegister(SIMDSizeCode, u16), RegisterOrSP(SizeCode, u16), ConditionCode(u8), Offset(u32), @@ -773,6 +829,13 @@ impl Display for Operand { } } }, + Operand::SIMDRegister(size, reg) => { + match size { + SIMDSizeCode::S => { write!(fmt, "s{}", reg) } + SIMDSizeCode::D => { write!(fmt, "d{}", reg) } + SIMDSizeCode::Q => { write!(fmt, "q{}", reg) } + } + } Operand::RegisterOrSP(size, reg) => { if *reg == 31 { match size { @@ -913,16 +976,19 @@ impl Display for Operand { } } +#[derive(Default, Debug)] +pub struct InstDecoder {} + #[allow(non_snake_case)] -impl Decodable for Instruction { - fn decode<T: IntoIterator<Item=u8>>(bytes: T) -> Option<Self> { +impl Decoder<Instruction> for InstDecoder { + fn decode<T: IntoIterator<Item=u8>>(&self, bytes: T) -> Option<Instruction> { let mut blank = Instruction::blank(); - match blank.decode_into(bytes) { + match self.decode_into(&mut blank, bytes) { Some(_) => Some(blank), None => None } } - fn decode_into<T: IntoIterator<Item=u8>>(&mut self, bytes: T) -> Option<()> { + fn decode_into<T: IntoIterator<Item=u8>>(&self, inst: &mut Instruction, bytes: T) -> Option<()> { fn read_word<T: IntoIterator<Item=u8>>(bytes: T) -> Option<u32> { let mut iter = bytes.into_iter(); let instr: u32 = @@ -990,7 +1056,7 @@ impl Decodable for Instruction { unreachable!(); } Section::Unallocated => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } Section::DataProcessingReg => { /* @@ -1003,7 +1069,6 @@ impl Decodable for Instruction { // These are of the form // XXX1101X_... let group_bits = (word >> 22) & 0x7; - println!("Group bits: {:#b}", group_bits); match group_bits { 0b000 => { // Add/subtract (with carry) @@ -1013,49 +1078,49 @@ impl Decodable for Instruction { let Rm = ((word >> 16) & 0x1f) as u16; if opc2 == 0b000000 { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; return Some(()); } let size_code = match word >> 29 { 0b000 => { - self.opcode = Opcode::ADC; + inst.opcode = Opcode::ADC; SizeCode::W } 0b001 => { - self.opcode = Opcode::ADCS; + inst.opcode = Opcode::ADCS; SizeCode::W } 0b010 => { - self.opcode = Opcode::SBC; + inst.opcode = Opcode::SBC; SizeCode::W } 0b011 => { - self.opcode = Opcode::SBCS; + inst.opcode = Opcode::SBCS; SizeCode::W } 0b100 => { - self.opcode = Opcode::ADC; + inst.opcode = Opcode::ADC; SizeCode::X } 0b101 => { - self.opcode = Opcode::ADCS; + inst.opcode = Opcode::ADCS; SizeCode::X } 0b110 => { - self.opcode = Opcode::SBC; + inst.opcode = Opcode::SBC; SizeCode::X } 0b111 => { - self.opcode = Opcode::SBCS; + inst.opcode = Opcode::SBCS; SizeCode::X } _ => { - unreachable!(); + unreachable!("opc and size flag are three bits"); } }; - self.operands = [ + inst.operands = [ Operand::Register(size_code, Rd), Operand::Register(size_code, Rn), Operand::Register(size_code, Rm), @@ -1064,6 +1129,7 @@ impl Decodable for Instruction { }, 0b001 => { // Conditional compare (register/immediate) + unimplemented!(); }, 0b010 => { // Conditional select @@ -1071,41 +1137,41 @@ impl Decodable for Instruction { let sf_op = (word >> 28) & 0x0c; if word & 0x20000000 != 0 { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; return Some(()); } let size = match sf_op | op2 { 0b0000 => { - self.opcode = Opcode::CSEL; + inst.opcode = Opcode::CSEL; SizeCode::W }, 0b0001 => { - self.opcode = Opcode::CSINC; + inst.opcode = Opcode::CSINC; SizeCode::W }, 0b0100 => { - self.opcode = Opcode::CSINV; + inst.opcode = Opcode::CSINV; SizeCode::W }, 0b0101 => { - self.opcode = Opcode::CSNEG; + inst.opcode = Opcode::CSNEG; SizeCode::W }, 0b1000 => { - self.opcode = Opcode::CSEL; + inst.opcode = Opcode::CSEL; SizeCode::X }, 0b1001 => { - self.opcode = Opcode::CSINC; + inst.opcode = Opcode::CSINC; SizeCode::X }, 0b1100 => { - self.opcode = Opcode::CSINV; + inst.opcode = Opcode::CSINV; SizeCode::X }, 0b1101 => { - self.opcode = Opcode::CSNEG; + inst.opcode = Opcode::CSNEG; SizeCode::X }, 0b0010 | @@ -1116,11 +1182,11 @@ impl Decodable for Instruction { 0b1011 | 0b1110 | 0b1111 => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; return Some(()); }, _ => { - unreachable!(); + unreachable!("sf, op, op2 are four bits total"); } }; @@ -1129,7 +1195,7 @@ impl Decodable for Instruction { let Rm = ((word >> 16) & 0x1f) as u16; let cond = ((word >> 12) & 0x0f) as u8; - self.operands = [ + inst.operands = [ Operand::Register(size, Rd), Operand::Register(size, Rn), Operand::Register(size, Rm), @@ -1138,9 +1204,64 @@ impl Decodable for Instruction { }, 0b011 => { // Data processing (1 source, 2 source) + if ((word >> 30) & 1) == 0 { + // X0X11010_110XXXXX_XXXXXXXX_XXXXXXXX + // Data-processing (2 source) + unimplemented!(); + } else { + // X1X11010_110XXXXX_XXXXXXXX_XXXXXXXX + // Data-processing (1 source) + let Rd = (word & 0x1f) as u16; + let Rn = ((word >> 5) & 0x1f) as u16; + let opcode = ((word >> 10) & 0x3f) as u8; + let opcode2 = ((word >> 16) & 0x1f) as u8; + // So ARMv8 ARM only says that 0b00000 has well-defined + // instructions + // however, PAC (added in v8.3) says otherwise. + match opcode2 { + 0b00000 => { + unimplemented!(); + } + 0b00001 => { + match opcode { + 0b000000 => { + inst.opcode = Opcode::PACIA; + inst.operands = [ + Operand::Register(SizeCode::X, Rd), + Operand::RegisterOrSP(SizeCode::X, Rn), + Operand::Nothing, + Operand::Nothing, + ]; + } + 0b001000 => { + if Rn != 31 { + // technically this is undefined - do some + // cores do something with this? + inst.opcode = Opcode::Invalid; + return None; + } + inst.opcode = Opcode::PACIZA; + inst.operands = [ + Operand::Register(SizeCode::X, Rd), + Operand::Nothing, + Operand::Nothing, + Operand::Nothing, + ]; + } + _ => { + inst.opcode = Opcode::Invalid; + } + } + } + _ => { + unimplemented!(); + } + } + } }, _ => { // Data processing (3 source) + unimplemented!(); } } } else { @@ -1153,12 +1274,37 @@ impl Decodable for Instruction { if (word & 0x01000000) == 0 { // Logical (shifted register) // XXX01010X_... - unreachable!(); + let sf = (word >> 31) == 1; + let size = if sf { SizeCode::X } else { SizeCode::W }; + + let opc = (word >> 28) & 6; + let n = (word >> 21) & 1; + inst.opcode = [ + Opcode::AND, + Opcode::BIC, + Opcode::ORR, + Opcode::ORN, + Opcode::EOR, + Opcode::EON, + Opcode::ANDS, + Opcode::BICS, + ][(opc | n) as usize]; + + let shift = ((word >> 22) & 3) as u8; + + let Rd = (word & 0x1f) as u16; + let Rn = ((word >> 5) & 0x1f) as u16; + let imm6 = ((word >> 10) & 0x13) as u8; + let Rm = ((word >> 16) & 0x1f) as u16; + + inst.operands[0] = Operand::Register(size, Rd); + inst.operands[1] = Operand::Register(size, Rn); + inst.operands[2] = Operand::RegShift(docs::DecodeShift(shift), imm6, size, Rm); } else { // Add/subtract ({shifted,extended} register) // XXX11011X_... // specific instruction is picked by the first two bits.. - self.opcode = [ + inst.opcode = [ Opcode::ADD, Opcode::ADDS, Opcode::SUB, @@ -1174,7 +1320,7 @@ impl Decodable for Instruction { // opt (bits 22, 23) must be 0 if (word >> 22) & 0x03 != 0 { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; return None; } @@ -1184,11 +1330,11 @@ impl Decodable for Instruction { let option = (word >> 13) & 0x07; let Rm = ((word >> 16) & 0x1f) as u16; - self.operands[0] = Operand::Register(size, Rd); - self.operands[1] = Operand::Register(size, Rn); + inst.operands[0] = Operand::Register(size, Rd); + inst.operands[1] = Operand::Register(size, Rn); let shift = (imm3 * 16) as u8; - self.operands[2] = match option { + inst.operands[2] = match option { 0b000 => Operand::RegShift(ShiftStyle::UXTB, shift, SizeCode::W, Rm), 0b001 => Operand::RegShift(ShiftStyle::UXTH, shift, SizeCode::W, Rm), 0b010 => Operand::RegShift(ShiftStyle::UXTW, shift, SizeCode::W, Rm), @@ -1197,14 +1343,14 @@ impl Decodable for Instruction { 0b101 => Operand::RegShift(ShiftStyle::SXTH, shift, SizeCode::W, Rm), 0b110 => Operand::RegShift(ShiftStyle::SXTW, shift, SizeCode::W, Rm), 0b111 => Operand::RegShift(ShiftStyle::SXTX, shift, SizeCode::X, Rm), - _ => { unreachable!(); }, + _ => { unreachable!("option is three bits"); }, }; } else { // shifted form let shift = (word >> 22) & 0x03; if shift == 0b11 { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; return None; } @@ -1214,18 +1360,18 @@ impl Decodable for Instruction { let Rm = ((word >> 16) & 0x1f) as u16; if size == SizeCode::W && imm6 >= 32 { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; return None; } - self.operands[0] = Operand::Register(size, Rd); - self.operands[1] = Operand::Register(size, Rn); + inst.operands[0] = Operand::Register(size, Rd); + inst.operands[1] = Operand::Register(size, Rn); - self.operands[2] = match shift { + inst.operands[2] = match shift { 0b00 => Operand::RegShift(ShiftStyle::LSL, imm6, size, Rm), 0b01 => Operand::RegShift(ShiftStyle::LSR, imm6, size, Rm), 0b10 => Operand::RegShift(ShiftStyle::ASR, imm6, size, Rm), - _ => { unreachable!(); }, + _ => { unreachable!("shift is two bits and 0b11 has early test"); }, }; } } @@ -1242,25 +1388,24 @@ impl Decodable for Instruction { 0b001 => { // PC-rel addressing if word >= 0x80000000 { - self.opcode = Opcode::ADRP; + inst.opcode = Opcode::ADRP; let imm = ((word >> 3) & 0x1ffffc) | ((word >> 29) & 0x3); - self.operands = [ + inst.operands = [ Operand::Register(SizeCode::X, (word & 0x1f) as u16), Operand::Immediate(imm * 0x1000), Operand::Nothing, Operand::Nothing ]; } else { - self.opcode = Opcode::ADR; + inst.opcode = Opcode::ADR; let imm = ((word >> 3) & 0x1ffffc) | ((word >> 29) & 0x3); - self.operands = [ + inst.operands = [ Operand::Register(SizeCode::X, (word & 0x1f) as u16), Operand::Immediate(imm), Operand::Nothing, Operand::Nothing ]; }; - } 0b010 | 0b011 => { @@ -1271,44 +1416,48 @@ impl Decodable for Instruction { let shift = (word >> 22) & 0x3; let size = match word >> 29 { 0b000 => { - self.opcode = Opcode::ADD; + inst.opcode = Opcode::ADD; SizeCode::W }, 0b001 => { - self.opcode = Opcode::ADDS; + inst.opcode = Opcode::ADDS; SizeCode::W }, 0b010 => { - self.opcode = Opcode::SUB; + inst.opcode = Opcode::SUB; SizeCode::W }, 0b011 => { - self.opcode = Opcode::SUBS; + inst.opcode = Opcode::SUBS; SizeCode::W }, 0b100 => { - self.opcode = Opcode::ADD; + inst.opcode = Opcode::ADD; SizeCode::X }, 0b101 => { - self.opcode = Opcode::ADDS; + inst.opcode = Opcode::ADDS; SizeCode::X }, 0b110 => { - self.opcode = Opcode::SUB; + inst.opcode = Opcode::SUB; SizeCode::X }, 0b111 => { - self.opcode = Opcode::SUBS; + inst.opcode = Opcode::SUBS; SizeCode::X }, _ => { - unreachable!(); + unreachable!("size and opc are three bits"); } }; - self.operands[0] = Operand::Register(size, Rd as u16); - self.operands[1] = Operand::RegisterOrSP(size, Rn as u16); - self.operands[2] = match shift { + if inst.opcode == Opcode::ADD || inst.opcode == Opcode::SUB { + inst.operands[0] = Operand::RegisterOrSP(size, Rd as u16); + } else { + inst.operands[0] = Operand::Register(size, Rd as u16); + } + inst.operands[1] = Operand::RegisterOrSP(size, Rn as u16); + inst.operands[2] = match shift { 0b00 => { Operand::Immediate(imm12 as u32) }, @@ -1317,12 +1466,12 @@ impl Decodable for Instruction { }, 0b10 | 0b11 => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; return None; } - _ => { unreachable!(); } + _ => { unreachable!("shift is two bits"); } }; - self.operands[3] = Operand::Nothing; + inst.operands[3] = Operand::Nothing; } 0b100 => { // logical (imm) @@ -1333,43 +1482,43 @@ impl Decodable for Instruction { let N = (word >> 22) & 1; let size = match word >> 29 { 0b000 => { - self.opcode = Opcode::AND; + inst.opcode = Opcode::AND; SizeCode::W } 0b001 => { - self.opcode = Opcode::ORR; + inst.opcode = Opcode::ORR; SizeCode::W } 0b010 => { - self.opcode = Opcode::EOR; + inst.opcode = Opcode::EOR; SizeCode::W } 0b011 => { - self.opcode = Opcode::ANDS; + inst.opcode = Opcode::ANDS; SizeCode::W } 0b100 => { - self.opcode = Opcode::AND; + inst.opcode = Opcode::AND; SizeCode::X } 0b101 => { - self.opcode = Opcode::ORR; + inst.opcode = Opcode::ORR; SizeCode::X } 0b110 => { - self.opcode = Opcode::EOR; + inst.opcode = Opcode::EOR; SizeCode::X } 0b111 => { - self.opcode = Opcode::ANDS; + inst.opcode = Opcode::ANDS; SizeCode::X } _ => { - unreachable!(); + unreachable!("size and opc are three bits"); } }; - self.operands = [ + inst.operands = [ Operand::Register(size, Rd), Operand::Register(size, Rn), match size { @@ -1387,54 +1536,54 @@ impl Decodable for Instruction { let size = match word >> 29 { 0b000 => { if hw >= 0x10 { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } else { - self.opcode = Opcode::MOVN; + inst.opcode = Opcode::MOVN; } SizeCode::W }, 0b001 => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; SizeCode::W } 0b010 => { if hw >= 0x10 { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } else { - self.opcode = Opcode::MOVZ; + inst.opcode = Opcode::MOVZ; } SizeCode::W }, 0b011 => { if hw >= 0x10 { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } else { - self.opcode = Opcode::MOVK; + inst.opcode = Opcode::MOVK; } SizeCode::W }, 0b100 => { - self.opcode = Opcode::MOVN; + inst.opcode = Opcode::MOVN; SizeCode::X }, 0b101 => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; SizeCode::X } 0b110 => { - self.opcode = Opcode::MOVZ; + inst.opcode = Opcode::MOVZ; SizeCode::X }, 0b111 => { - self.opcode = Opcode::MOVK; + inst.opcode = Opcode::MOVK; SizeCode::X }, _ => { - unreachable!(); + unreachable!("size and opc are three bits"); } }; - self.operands = [ + inst.operands = [ Operand::Register(size, Rd as u16), Operand::ImmShift(imm16 as u16, hw as u8), Operand::Nothing, @@ -1454,66 +1603,66 @@ impl Decodable for Instruction { let size = match sf_opc { 0b000 => { if N == 0 { - self.opcode = Opcode::SBFM; + inst.opcode = Opcode::SBFM; } else { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } SizeCode::W } 0b001 => { if N == 0 { - self.opcode = Opcode::BFM; + inst.opcode = Opcode::BFM; } else { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } SizeCode::W } 0b010 => { if N == 0 { - self.opcode = Opcode::UBFM; + inst.opcode = Opcode::UBFM; } else { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } SizeCode::W } 0b011 => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; SizeCode::W } 0b100 => { if N == 1 { - self.opcode = Opcode::SBFM; + inst.opcode = Opcode::SBFM; } else { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } SizeCode::X } 0b101 => { if N == 1 { - self.opcode = Opcode::SBFM; + inst.opcode = Opcode::SBFM; } else { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } SizeCode::X } 0b110 => { if N == 1 { - self.opcode = Opcode::SBFM; + inst.opcode = Opcode::SBFM; } else { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } SizeCode::X } 0b111 => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; SizeCode::X } _ => { - unreachable!(); + unreachable!("size and opc are three bits"); } }; - self.operands = [ + inst.operands = [ Operand::Register(size, Rd as u16), Operand::Register(size, Rn as u16), Operand::Immediate(immr as u32), @@ -1532,20 +1681,20 @@ impl Decodable for Instruction { if sf_op21 == 0b000 { if No0 != 0b00 || imms >= 0x10 { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } else { - self.opcode = Opcode::EXTR; + inst.opcode = Opcode::EXTR; } } else if sf_op21 == 0b100 { if No0 != 0b10 { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } else { - self.opcode = Opcode::EXTR; + inst.opcode = Opcode::EXTR; } } else { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } - unreachable!("decode Rd: {}, Rn: {}, imms: {}, Rm: {}, No0: {}", Rd, Rn, imms, Rm, No0); + unimplemented!("decode Rd: {}, Rn: {}, imms: {}, Rm: {}, No0: {}", Rd, Rn, imms, Rm, No0); } _ => { unreachable!() } } @@ -1568,45 +1717,131 @@ impl Decodable for Instruction { println!("Group byte: {:#b}, bits: {:#b}", group_byte, group_bits); match group_bits { 0b00000 => { - let Rt = word & 0x1f; - let Rn = (word >> 5) & 0x1f; - let Rt2 = (word >> 10) & 0x1f; - let o0 = word & 0x0080; - let Rs = (word >> 16) & 0x1f; - let Lo1 = word & 0x600000; + let Rt = (word & 0x1f) as u16; + let Rn = ((word >> 5) & 0x1f) as u16; + let Rt2 = ((word >> 10) & 0x1f) as u16; + let o0 = (word & 0x0080) >> 7; + let Rs = ((word >> 16) & 0x1f) as u16; + let Lo1 = (word & 0x600000) >> 21; let size = (word >> 29) & 0x3; // load/store exclusive // o2 == 0 - self.opcode = match (size, Lo1, o0) { - (0b00, 0b00, 0b0) => Opcode::STXRB, - (0b00, 0b00, 0b1) => Opcode::STLXRB, - (0b00, 0b10, 0b0) => Opcode::LDXRB, - (0b00, 0b10, 0b1) => Opcode::LDAXRB, - (0b01, 0b00, 0b0) => Opcode::STXRH, - (0b01, 0b00, 0b1) => Opcode::STLXRH, - (0b01, 0b10, 0b0) => Opcode::LDXRH, - (0b01, 0b10, 0b1) => Opcode::LDAXRH, - (0b10, 0b00, 0b0) => Opcode::STXR, // 32-bit - (0b10, 0b00, 0b1) => Opcode::STLXR, // 32-bit - (0b10, 0b01, 0b0) => Opcode::STXP, // 32-bit - (0b10, 0b01, 0b1) => Opcode::STLXP, // 32-bit - (0b10, 0b10, 0b0) => Opcode::LDXR, // 32-bit - (0b10, 0b10, 0b1) => Opcode::LDAXR, // 32-bit - (0b10, 0b11, 0b0) => Opcode::LDXP, // 32-bit - (0b10, 0b11, 0b1) => Opcode::LDAXP, // 32-bit - (0b11, 0b00, 0b0) => Opcode::STXR, // 64-bit - (0b11, 0b00, 0b1) => Opcode::STLXR, // 64-bit - (0b11, 0b01, 0b0) => Opcode::STXP, // 64-bit - (0b11, 0b01, 0b1) => Opcode::STLXP, // 64-bit - (0b11, 0b10, 0b0) => Opcode::LDXR, // 64-bit - (0b11, 0b10, 0b1) => Opcode::LDAXR, // 64-bit - (0b11, 0b11, 0b0) => Opcode::LDXP, // 64-bit - (0b11, 0b11, 0b1) => Opcode::LDAXP, // 64-bit + inst.opcode = match size { + size @ 0b00 | + size @ 0b01 => { + if Lo1 == 0b00 { + // store ops + inst.operands = [ + Operand::Register(SizeCode::W, Rs), + Operand::Register(SizeCode::W, Rt), + Operand::RegisterOrSP(SizeCode::X, Rn), + Operand::Nothing, + ]; + } else if Lo1 == 0b10 { + // load ops + inst.operands = [ + Operand::Register(SizeCode::W, Rt), + Operand::RegisterOrSP(SizeCode::X, Rn), + Operand::Nothing, + Operand::Nothing, + ]; + } else { + unreachable!("Lo checked for validity already"); + }; + if size == 0b00 { + match (Lo1, o0) { + (0b00, 0b0) => Opcode::STXRB, + (0b00, 0b1) => Opcode::STLXRB, + (0b10, 0b0) => Opcode::LDXRB, + (0b10, 0b1) => Opcode::LDAXRB, + _ => { + inst.opcode = Opcode::Invalid; + return None; + } + } + } else if size == 0b01 { + match (Lo1, o0) { + (0b00, 0b0) => Opcode::STXRH, + (0b00, 0b1) => Opcode::STLXRH, + (0b10, 0b0) => Opcode::LDXRH, + (0b10, 0b1) => Opcode::LDAXRH, + _ => { + inst.opcode = Opcode::Invalid; + return None; + } + } + } else { + unreachable!("size was checked to be 0 or 1"); + } + } + size @ 0b10 | + size @ 0b11 => { + let size_code = match size { + 0b10 => SizeCode::W, + 0b11 => SizeCode::X, + _ => { unreachable!("size is already known to be 0b10 or 0b11"); } + }; + + match Lo1 { + 0b00 => { + inst.operands = [ + Operand::Register(SizeCode::W, Rs), + Operand::Register(size_code, Rt), + Operand::RegisterOrSP(SizeCode::X, Rn), // memory operand? + Operand::Nothing, + ]; + match o0 { + 0b0 => Opcode::STXR, + 0b1 => Opcode::STLXR, + _ => { unreachable!("o0 is one bit"); } + } + } + 0b01 => { + inst.operands = [ + Operand::Register(SizeCode::W, Rs), + Operand::Register(size_code, Rt), + Operand::Register(size_code, Rt2), + Operand::RegisterOrSP(SizeCode::X, Rn), // memory operand? + ]; + match o0 { + 0b0 => Opcode::STXP, + 0b1 => Opcode::STLXP, + _ => { unreachable!("o0 is one bit"); } + } + } + 0b10 => { + inst.operands = [ + Operand::Register(size_code, Rt), + Operand::RegisterOrSP(SizeCode::X, Rn), // memory operand? + Operand::Nothing, + Operand::Nothing, + ]; + match o0 { + 0b0 => Opcode::LDXR, + 0b1 => Opcode::LDAXR, + _ => { unreachable!("o0 is one bit"); } + } + } + 0b11 => { + inst.operands = [ + Operand::Register(size_code, Rt), + Operand::Register(size_code, Rt2), + Operand::RegisterOrSP(SizeCode::X, Rn), // memory operand? + Operand::Nothing, + ]; + match o0 { + 0b0 => Opcode::LDXP, + 0b1 => Opcode::LDAXP, + _ => { unreachable!("o0 is one bit"); } + } + } + _ => { unreachable!("Lo1 is two bits"); } + } + } _ => { - Opcode::Invalid + unreachable!("size is two bits"); } - }; - unreachable!("Rt: {}, Rn: {}, Rt2: {}, Rs: {}", Rt, Rn, Rt2, Rs); + } }, 0b00001 => { let Rt = (word & 0x1f) as u16; @@ -1618,8 +1853,15 @@ impl Decodable for Instruction { let size = (word >> 30) & 0x3; // load/store exclusive // o2 == 1 - println!("Word: {:#b}", word); - self.opcode = match (size, Lo1, o0) { + // STLRB -> Wt (Rt) Xn|SP (Rn) + // LDARB -> Wt (Rt) Xn|SP (Rn) + // STLRH -> Wt (Rt) Xn|SP (Rn) + // LDARH -> Wt (Rt) Xn|SP (Rn) + // STLR -> Wt (Rt) Xn|SP (Rn) + // LDAR -> Wt (Rt) Xn|SP (Rn) + // STLR -> Wt (Rt) Xn|SP (Rn) + // LDAR -> Wt (Rt) Xn|SP (Rn) + inst.opcode = match (size, Lo1, o0) { (0b00, 0b00, 0b1) => Opcode::STLRB, (0b00, 0b10, 0b1) => Opcode::LDARB, (0b01, 0b00, 0b1) => Opcode::STLRH, @@ -1629,7 +1871,8 @@ impl Decodable for Instruction { (0b11, 0b00, 0b1) => Opcode::STLR, // 64-bit (0b11, 0b10, 0b1) => Opcode::LDAR, // 64-bit _ => { - Opcode::Invalid + inst.opcode = Opcode::Invalid; + return None; } }; let size_code = if size == 0b11 { @@ -1638,46 +1881,45 @@ impl Decodable for Instruction { SizeCode::W }; - self.operands = [ + inst.operands = [ Operand::Register(size_code, Rt), Operand::RegOffset(Rn, 0), Operand::Nothing, Operand::Nothing, ]; - unreachable!("Rt: {}, Rn: {}, Rt2: {}, Rs: {}", Rt, Rn, Rt2, Rs); }, 0b01000 | 0b01001 => { // load register (literal) // V == 0 - let opc = (word >> 29) & 0x3; + let opc = (word >> 30) & 0x3; let Rt = (word & 0x1f) as u16; let imm19 = (word >> 5) & 0x7fff; let size = match opc { 0b00 => { - self.opcode = Opcode::LDR; + inst.opcode = Opcode::LDR; SizeCode::W }, 0b01 => { - self.opcode = Opcode::LDR; + inst.opcode = Opcode::LDR; SizeCode::X } 0b10 => { - self.opcode = Opcode::LDRSW; + inst.opcode = Opcode::LDRSW; SizeCode::X } 0b11 => { - unreachable!("PRFM is not supported"); + unimplemented!("PRFM is not supported"); } _ => { - unreachable!(); + unreachable!("opc is two bits"); } }; - self.operands = [ + inst.operands = [ Operand::Register(size, Rt), - Operand::PCOffset(imm19), + Operand::PCOffset(imm19 * 4), Operand::Nothing, Operand::Nothing, ]; @@ -1686,22 +1928,43 @@ impl Decodable for Instruction { 0b01101 => { // load register (literal) // V == 1 - let opc = (word >> 29) & 0x3; - let Rt = word & 0x1f; + let opc = (word >> 30) & 0x3; + let Rt = (word & 0x1f) as u16; let imm19 = (word >> 5) & 0x7fff; - panic!("C3.3.5 V==1. opc: {}, Rt: {}, imm19: {}", opc, Rt, imm19); + + let size_code = match opc { + 0b00 => SIMDSizeCode::S, + 0b01 => SIMDSizeCode::D, + 0b10 => SIMDSizeCode::Q, + 0b11 => { + // 11011100_XXXXXXXX_XXXXXXXX_XXXXXXXX + inst.opcode = Opcode::Invalid; + return None; + } + _ => { + unreachable!("opc is two bits"); + } + }; + + inst.opcode = Opcode::LDR; + inst.operands = [ + Operand::SIMDRegister(size_code, Rt), + Operand::PCOffset(imm19 * 4), + Operand::Nothing, + Operand::Nothing, + ]; }, 0b10000 => { // load/store no-allocate pair (offset) // V == 0 let opc_L = ((word >> 22) & 1) | ((word >> 29) & 0x6); - panic!("C3.3.7 V==0, opc_L: {}", opc_L); + unimplemented!("C3.3.7 V==0, opc_L: {}", opc_L); }, 0b10100 => { // load/store no-allocate pair (offset) // V == 1 let opc_L = ((word >> 22) & 1) | ((word >> 29) & 0x6); - panic!("C3.3.7 V==1, opc_L: {}", opc_L); + unimplemented!("C3.3.7 V==1, opc_L: {}", opc_L); }, 0b10001 => { // load/store register pair (post-indexed) @@ -1713,42 +1976,42 @@ impl Decodable for Instruction { let opc_L = ((word >> 22) & 1) | ((word >> 29) & 0x6); let size = match opc_L { 0b000 => { - self.opcode = Opcode::STP; + inst.opcode = Opcode::STP; imm7 <<= 2; SizeCode::W }, 0b001 => { - self.opcode = Opcode::LDP; + inst.opcode = Opcode::LDP; imm7 <<= 2; SizeCode::W }, 0b010 => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; SizeCode::W }, 0b011 => { - self.opcode = Opcode::LDPSW; + inst.opcode = Opcode::LDPSW; imm7 <<= 2; SizeCode::W }, 0b100 => { - self.opcode = Opcode::STP; + inst.opcode = Opcode::STP; imm7 <<= 3; SizeCode::X }, 0b101 => { - self.opcode = Opcode::LDP; + inst.opcode = Opcode::LDP; imm7 <<= 3; SizeCode::X }, 0b110 | 0b111 => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; SizeCode::X } - _ => { unreachable!(); } + _ => { unreachable!("opc and L are three bits"); } }; - self.operands = [ + inst.operands = [ Operand::Register(size, Rt), Operand::Register(size, Rt2), Operand::RegPostIndex(Rn, imm7), @@ -1759,7 +2022,7 @@ impl Decodable for Instruction { // load/store register pair (post-indexed) // V == 1 let opc_L = ((word >> 22) & 1) | ((word >> 29) & 0x6); - panic!("C3.3.15 V==1, opc_L: {}", opc_L); + unreachable!("C3.3.15 V==1, opc_L: {}", opc_L); }, 0b10010 => { // load/store register pair (offset) @@ -1771,42 +2034,42 @@ impl Decodable for Instruction { let opc_L = ((word >> 22) & 1) | ((word >> 29) & 0x6); let size = match opc_L { 0b000 => { - self.opcode = Opcode::STP; + inst.opcode = Opcode::STP; imm7 <<= 2; SizeCode::W }, 0b001 => { - self.opcode = Opcode::LDP; + inst.opcode = Opcode::LDP; imm7 <<= 2; SizeCode::W }, 0b010 => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; SizeCode::W }, 0b011 => { - self.opcode = Opcode::LDPSW; + inst.opcode = Opcode::LDPSW; imm7 <<= 2; SizeCode::W }, 0b100 => { - self.opcode = Opcode::STP; + inst.opcode = Opcode::STP; imm7 <<= 3; SizeCode::X }, 0b101 => { - self.opcode = Opcode::LDP; + inst.opcode = Opcode::LDP; imm7 <<= 3; SizeCode::X }, 0b110 | 0b111 => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; SizeCode::X } - _ => { unreachable!(); } + _ => { unreachable!("opc and L are three bits"); } }; - self.operands = [ + inst.operands = [ Operand::Register(size, Rt), Operand::Register(size, Rt2), Operand::RegOffset(Rn, imm7), @@ -1817,7 +2080,7 @@ impl Decodable for Instruction { // load/store register pair (offset) // V == 1 let opc_L = ((word >> 22) & 1) | ((word >> 29) & 0x6); - panic!("C3.3.14 V==1, opc_L: {}", opc_L); + unimplemented!("C3.3.14 V==1, opc_L: {}", opc_L); }, 0b10011 => { // load/store register pair (pre-indexed) @@ -1829,42 +2092,42 @@ impl Decodable for Instruction { let opc_L = ((word >> 22) & 1) | ((word >> 29) & 0x6); let size = match opc_L { 0b000 => { - self.opcode = Opcode::STP; + inst.opcode = Opcode::STP; imm7 <<= 2; SizeCode::W }, 0b001 => { - self.opcode = Opcode::LDP; + inst.opcode = Opcode::LDP; imm7 <<= 2; SizeCode::W }, 0b010 => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; SizeCode::W }, 0b011 => { - self.opcode = Opcode::LDPSW; + inst.opcode = Opcode::LDPSW; imm7 <<= 2; SizeCode::W }, 0b100 => { - self.opcode = Opcode::STP; + inst.opcode = Opcode::STP; imm7 <<= 3; SizeCode::X }, 0b101 => { - self.opcode = Opcode::LDP; + inst.opcode = Opcode::LDP; imm7 <<= 3; SizeCode::X }, 0b110 | 0b111 => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; SizeCode::X } - _ => { unreachable!(); } + _ => { unreachable!("opc and L are three bits"); } }; - self.operands = [ + inst.operands = [ Operand::Register(size, Rt), Operand::Register(size, Rt2), Operand::RegPreIndex(Rn, imm7), @@ -1875,7 +2138,7 @@ impl Decodable for Instruction { // load/store register pair (pre-indexed) // V == 1 let opc_L = ((word >> 22) & 1) | ((word >> 29) & 0x6); - panic!("C3.3.16 V==1, opc_L: {}", opc_L); + unimplemented!("C3.3.16 V==1, opc_L: {}", opc_L); }, 0b11000 | 0b11001 => { @@ -1891,78 +2154,78 @@ impl Decodable for Instruction { println!("load/store: size_opc: {:#b}, category: {:#b}", size_opc, category); if word & 0x200000 != 0 { if category != 0b10 { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; return Some(()); } else { // Load/store register (register offset) // C3.3.10 let size = match size_opc { 0b0000 => { - self.opcode = Opcode::STRB; + inst.opcode = Opcode::STRB; SizeCode::W }, 0b0001 => { - self.opcode = Opcode::LDRB; + inst.opcode = Opcode::LDRB; SizeCode::W }, 0b0010 => { - self.opcode = Opcode::LDRSB; + inst.opcode = Opcode::LDRSB; SizeCode::X }, 0b0011 => { - self.opcode = Opcode::LDRSB; + inst.opcode = Opcode::LDRSB; SizeCode::W }, 0b0100 => { - self.opcode = Opcode::STRH; + inst.opcode = Opcode::STRH; SizeCode::W }, 0b0101 => { - self.opcode = Opcode::LDRH; + inst.opcode = Opcode::LDRH; SizeCode::W }, 0b0110 => { - self.opcode = Opcode::LDRSH; + inst.opcode = Opcode::LDRSH; SizeCode::X }, 0b0111 => { - self.opcode = Opcode::LDRSH; + inst.opcode = Opcode::LDRSH; SizeCode::W }, 0b1000 => { - self.opcode = Opcode::STR; + inst.opcode = Opcode::STR; SizeCode::W }, 0b1001 => { - self.opcode = Opcode::LDR; + inst.opcode = Opcode::LDR; SizeCode::W }, 0b1010 => { - self.opcode = Opcode::LDRSW; + inst.opcode = Opcode::LDRSW; SizeCode::X }, 0b1011 => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; SizeCode::X }, 0b1100 => { - self.opcode = Opcode::STR; + inst.opcode = Opcode::STR; SizeCode::X }, 0b1101 => { - self.opcode = Opcode::LDR; + inst.opcode = Opcode::LDR; SizeCode::X }, 0b1110 => { - panic!("PRFM is not supported yet"); -// self.opcode = Opcode::PRFM; + unimplemented!("PRFM is not supported yet"); +// inst.opcode = Opcode::PRFM; // SizeCode::X }, 0b1111 => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; SizeCode::X }, - _ => { unreachable!(); } + _ => { unreachable!("size and opc are four bits"); } }; let S = ((word >> 12) & 0x1) as u8; @@ -1972,33 +2235,33 @@ impl Decodable for Instruction { let index_size = match option & 0x3 { 0b00 | 0b01 => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; return Some(()); }, 0b10 => { SizeCode::W } 0b11 => { SizeCode::X } - _ => { unreachable!(); } + _ => { unreachable!("option is two bits"); } }; let shift_style = match option { 0b000 | 0b001 => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; return Some(()); }, 0b010 => { ShiftStyle::UXTW }, 0b011 => { ShiftStyle::LSL }, 0b100 | 0b101 => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; return Some(()); }, 0b110 => { ShiftStyle::SXTW }, 0b111 => { ShiftStyle::SXTX }, - _ => { unreachable!(); } + _ => { unreachable!("option is three bits"); } }; - self.operands = [ + inst.operands = [ Operand::Register(size, Rt), Operand::RegRegOffset(Rn, index_size, Rm, shift_style, S), Operand::Nothing, @@ -2012,74 +2275,74 @@ impl Decodable for Instruction { // Load/store register (unscaled immediate) let size = match size_opc { 0b0000 => { - self.opcode = Opcode::STURB; + inst.opcode = Opcode::STURB; SizeCode::W } 0b0001 => { - self.opcode = Opcode::LDURB; + inst.opcode = Opcode::LDURB; SizeCode::W } 0b0010 => { - self.opcode = Opcode::LDURSB; + inst.opcode = Opcode::LDURSB; SizeCode::X } 0b0011 => { - self.opcode = Opcode::LDURSB; + inst.opcode = Opcode::LDURSB; SizeCode::W } 0b0100 => { - self.opcode = Opcode::STURH; + inst.opcode = Opcode::STURH; SizeCode::W } 0b0101 => { - self.opcode = Opcode::LDURH; + inst.opcode = Opcode::LDURH; SizeCode::W } 0b0110 => { - self.opcode = Opcode::LDURSH; + inst.opcode = Opcode::LDURSH; SizeCode::X } 0b0111 => { - self.opcode = Opcode::LDURSH; + inst.opcode = Opcode::LDURSH; SizeCode::W } 0b1000 => { - self.opcode = Opcode::STUR; + inst.opcode = Opcode::STUR; SizeCode::W } 0b1001 => { - self.opcode = Opcode::LDUR; + inst.opcode = Opcode::LDUR; SizeCode::W } 0b1010 => { - self.opcode = Opcode::LDURSW; + inst.opcode = Opcode::LDURSW; SizeCode::X } 0b1011 => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; SizeCode::W } 0b1100 => { - self.opcode = Opcode::STUR; + inst.opcode = Opcode::STUR; SizeCode::X } 0b1101 => { - self.opcode = Opcode::LDUR; + inst.opcode = Opcode::LDUR; SizeCode::X } 0b1110 => { - panic!("PRFUM not handled yet"); + unimplemented!("PRFUM not handled yet"); }, 0b1111 => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; SizeCode::W } _ => { - unreachable!(); + unreachable!("size and opc are four bits"); } }; - self.operands = [ + inst.operands = [ Operand::Register(size, Rt), Operand::RegOffset(Rn, imm9), Operand::Nothing, @@ -2091,72 +2354,72 @@ impl Decodable for Instruction { let size = match size_opc { 0b0000 => { - self.opcode = Opcode::STTRB; + inst.opcode = Opcode::STTRB; SizeCode::W } 0b0001 => { - self.opcode = Opcode::LDTRB; + inst.opcode = Opcode::LDTRB; SizeCode::W } 0b0010 => { - self.opcode = Opcode::LDTRSB; + inst.opcode = Opcode::LDTRSB; SizeCode::X } 0b0011 => { - self.opcode = Opcode::LDTRSB; + inst.opcode = Opcode::LDTRSB; SizeCode::W } 0b0100 => { - self.opcode = Opcode::STTRH; + inst.opcode = Opcode::STTRH; SizeCode::W } 0b0101 => { - self.opcode = Opcode::LDTRH; + inst.opcode = Opcode::LDTRH; SizeCode::W } 0b0110 => { - self.opcode = Opcode::LDTRSH; + inst.opcode = Opcode::LDTRSH; SizeCode::X } 0b0111 => { - self.opcode = Opcode::LDTRSH; + inst.opcode = Opcode::LDTRSH; SizeCode::W } 0b1000 => { - self.opcode = Opcode::STTR; + inst.opcode = Opcode::STTR; SizeCode::W } 0b1001 => { - self.opcode = Opcode::LDTR; + inst.opcode = Opcode::LDTR; SizeCode::W } 0b1010 => { - self.opcode = Opcode::LDTRSW; + inst.opcode = Opcode::LDTRSW; SizeCode::X } 0b1011 => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; SizeCode::W } 0b1100 => { - self.opcode = Opcode::STTR; + inst.opcode = Opcode::STTR; SizeCode::X } 0b1101 => { - self.opcode = Opcode::LDTR; + inst.opcode = Opcode::LDTR; SizeCode::X } 0b1110 | 0b1111 => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; SizeCode::W } _ => { - unreachable!(); + unreachable!("size and opc are four bits"); } }; - self.operands = [ + inst.operands = [ Operand::Register(size, Rt), Operand::RegPreIndex(Rn, imm9), Operand::Nothing, @@ -2167,69 +2430,69 @@ impl Decodable for Instruction { 0b11 => { let size = match size_opc { 0b0000 => { - self.opcode = Opcode::STRB; + inst.opcode = Opcode::STRB; SizeCode::W }, 0b0001 => { - self.opcode = Opcode::LDRB; + inst.opcode = Opcode::LDRB; SizeCode::W } 0b0010 => { - self.opcode = Opcode::LDRSB; + inst.opcode = Opcode::LDRSB; SizeCode::X } 0b0011 => { - self.opcode = Opcode::LDRSB; + inst.opcode = Opcode::LDRSB; SizeCode::W } 0b0100 => { - self.opcode = Opcode::STRH; + inst.opcode = Opcode::STRH; SizeCode::W } 0b0101 => { - self.opcode = Opcode::LDRH; + inst.opcode = Opcode::LDRH; SizeCode::W } 0b0110 => { - self.opcode = Opcode::LDRSH; + inst.opcode = Opcode::LDRSH; SizeCode::X } 0b0111 => { - self.opcode = Opcode::LDRSH; + inst.opcode = Opcode::LDRSH; SizeCode::W } 0b1000 => { - self.opcode = Opcode::STR; + inst.opcode = Opcode::STR; SizeCode::W } 0b1001 => { - self.opcode = Opcode::LDR; + inst.opcode = Opcode::LDR; SizeCode::W } 0b1010 | 0b1011 => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; SizeCode::W } 0b1100 => { - self.opcode = Opcode::STR; + inst.opcode = Opcode::STR; SizeCode::X } 0b1101 => { - self.opcode = Opcode::LDR; + inst.opcode = Opcode::LDR; SizeCode::X } 0b1110 | 0b1111 => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; SizeCode::X } _ => { - unreachable!(); + unreachable!("size and opc are four bits"); } }; - self.operands = [ + inst.operands = [ Operand::Register(size, Rt), if category == 0b01 { Operand::RegPostIndex(Rn, imm9) @@ -2241,7 +2504,7 @@ impl Decodable for Instruction { ]; }, _ => { - unreachable!(); + unreachable!("category is two bits"); } } } @@ -2253,6 +2516,7 @@ impl Decodable for Instruction { * unprivileged, immediate pre-indexd, register offset} * V == 1 */ + unimplemented!("load/store register (unscaled immediate), load/store register (immediate post-indexed), V==1"); } 0b11010 | 0b11011 => { @@ -2264,8 +2528,8 @@ impl Decodable for Instruction { let size_opc = ((word >> 22) & 0x3) | ((word >> 28) & 0xc); match size_opc { 0b0000 => { - self.opcode = Opcode::STRB; - self.operands = [ + inst.opcode = Opcode::STRB; + inst.operands = [ Operand::Register(SizeCode::W, Rt), Operand::RegOffset(Rn, imm12), Operand::Nothing, @@ -2273,8 +2537,8 @@ impl Decodable for Instruction { ]; } 0b0001 => { - self.opcode = Opcode::LDRB; - self.operands = [ + inst.opcode = Opcode::LDRB; + inst.operands = [ Operand::Register(SizeCode::W, Rt), Operand::RegOffset(Rn, imm12), Operand::Nothing, @@ -2282,8 +2546,8 @@ impl Decodable for Instruction { ]; } 0b0010 => { - self.opcode = Opcode::LDRSB; - self.operands = [ + inst.opcode = Opcode::LDRSB; + inst.operands = [ Operand::Register(SizeCode::X, Rt), Operand::RegOffset(Rn, imm12), Operand::Nothing, @@ -2291,8 +2555,8 @@ impl Decodable for Instruction { ]; } 0b0011 => { - self.opcode = Opcode::LDRSB; - self.operands = [ + inst.opcode = Opcode::LDRSB; + inst.operands = [ Operand::Register(SizeCode::W, Rt), Operand::RegOffset(Rn, imm12), Operand::Nothing, @@ -2300,8 +2564,8 @@ impl Decodable for Instruction { ]; } 0b0100 => { - self.opcode = Opcode::STRH; - self.operands = [ + inst.opcode = Opcode::STRH; + inst.operands = [ Operand::Register(SizeCode::W, Rt), Operand::RegOffset(Rn, imm12 << 1), Operand::Nothing, @@ -2309,8 +2573,8 @@ impl Decodable for Instruction { ]; } 0b0101 => { - self.opcode = Opcode::LDRH; - self.operands = [ + inst.opcode = Opcode::LDRH; + inst.operands = [ Operand::Register(SizeCode::W, Rt), Operand::RegOffset(Rn, imm12 << 1), Operand::Nothing, @@ -2318,8 +2582,8 @@ impl Decodable for Instruction { ]; } 0b0110 => { - self.opcode = Opcode::LDRSH; - self.operands = [ + inst.opcode = Opcode::LDRSH; + inst.operands = [ Operand::Register(SizeCode::X, Rt), Operand::RegOffset(Rn, imm12 << 1), Operand::Nothing, @@ -2327,8 +2591,8 @@ impl Decodable for Instruction { ]; } 0b0111 => { - self.opcode = Opcode::LDRSH; - self.operands = [ + inst.opcode = Opcode::LDRSH; + inst.operands = [ Operand::Register(SizeCode::W, Rt), Operand::RegOffset(Rn, imm12 << 1), Operand::Nothing, @@ -2336,8 +2600,8 @@ impl Decodable for Instruction { ]; } 0b1000 => { - self.opcode = Opcode::STR; - self.operands = [ + inst.opcode = Opcode::STR; + inst.operands = [ Operand::Register(SizeCode::W, Rt), Operand::RegOffset(Rn, imm12 << 2), Operand::Nothing, @@ -2345,8 +2609,8 @@ impl Decodable for Instruction { ]; } 0b1001 => { - self.opcode = Opcode::LDR; - self.operands = [ + inst.opcode = Opcode::LDR; + inst.operands = [ Operand::Register(SizeCode::W, Rt), Operand::RegOffset(Rn, imm12 << 2), Operand::Nothing, @@ -2354,18 +2618,18 @@ impl Decodable for Instruction { ]; } 0b1010 => { - self.opcode = Opcode::LDRSW; - self.operands = [ + inst.opcode = Opcode::LDRSW; + inst.operands = [ Operand::Register(SizeCode::X, Rt), Operand::RegOffset(Rn, imm12 << 2), Operand::Nothing, Operand::Nothing, ]; } - 0b1011 => { self.opcode = Opcode::Invalid; } + 0b1011 => { inst.opcode = Opcode::Invalid; } 0b1100 => { - self.opcode = Opcode::STR; - self.operands = [ + inst.opcode = Opcode::STR; + inst.operands = [ Operand::Register(SizeCode::X, Rt), Operand::RegOffset(Rn, imm12 << 3), Operand::Nothing, @@ -2373,8 +2637,8 @@ impl Decodable for Instruction { ]; } 0b1101 => { - self.opcode = Opcode::LDR; - self.operands = [ + inst.opcode = Opcode::LDR; + inst.operands = [ Operand::Register(SizeCode::X, Rt), Operand::RegOffset(Rn, imm12 << 3), Operand::Nothing, @@ -2382,31 +2646,36 @@ impl Decodable for Instruction { ]; } 0b1110 => { - unreachable!("PRFM not yet supported"); + unimplemented!("PRFM not yet supported"); } - 0b1111 => { self.opcode = Opcode::Invalid; } - _ => { unreachable!(); } + 0b1111 => { inst.opcode = Opcode::Invalid; } + _ => { unreachable!("size and opc are four bits"); } } }, 0b11110 | 0b11111 => { // load/store register (unsigned immediate) // V == 1 + unimplemented!("load/store register (unsigned immediate) V==1"); }, 0b00100 => { // AdvSIMD load/store multiple structures + unimplemented!("AdvSIMD load/store multiple structures"); }, 0b00101 => { // AdvSIMD load/store multiple structures (post-indexed) + unimplemented!("AdvSIMD load/store multiple structures (post-indexed)"); }, 0b00110 => { // AdvSIMD load/store single structure + unimplemented!("AdvSIMD load/store single structure"); }, 0b00111 => { // AdvSIMD load/store single structure (post-indexed) + unimplemented!("AdvSIMD load/store single structures (post-indexed)"); } _ => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } } }, @@ -2417,8 +2686,8 @@ impl Decodable for Instruction { 0b00001 | 0b00010 | 0b00011 => { // unconditional branch (imm) - self.opcode = Opcode::B; - self.operands = [ + inst.opcode = Opcode::B; + inst.operands = [ Operand::Offset((word & 0x01ffffff) << 2), Operand::Nothing, Operand::Nothing, @@ -2426,10 +2695,10 @@ impl Decodable for Instruction { ]; }, 0b00100 => { // compare branch (imm) - self.opcode = Opcode::CBZ; + inst.opcode = Opcode::CBZ; let imm = (word >> 3) & 0x001ffffc; let Rt = word & 0x1f; - self.operands = [ + inst.operands = [ Operand::Register(SizeCode::W, Rt as u16), Operand::Offset(imm), Operand::Nothing, @@ -2437,10 +2706,10 @@ impl Decodable for Instruction { ]; }, 0b00101 => { // compare branch (imm) - self.opcode = Opcode::CBNZ; + inst.opcode = Opcode::CBNZ; let imm = (word >> 3) & 0x001ffffc; let Rt = word & 0x1f; - self.operands = [ + inst.operands = [ Operand::Register(SizeCode::W, Rt as u16), Operand::Offset(imm), Operand::Nothing, @@ -2451,8 +2720,8 @@ impl Decodable for Instruction { let imm = (word >> 3) & 0x0003fffc; let b = (word >> 19) & 0x1f; let Rt = word & 0x1f; - self.opcode = Opcode::TBZ; - self.operands = [ + inst.opcode = Opcode::TBZ; + inst.operands = [ Operand::Register(SizeCode::W, Rt as u16), Operand::Imm16(b as u16), Operand::Offset(imm), @@ -2463,8 +2732,8 @@ impl Decodable for Instruction { let imm = (word >> 3) & 0x0003fffc; let b = (word >> 19) & 0x1f; let Rt = word & 0x1f; - self.opcode = Opcode::TBNZ; - self.operands = [ + inst.opcode = Opcode::TBNZ; + inst.operands = [ Operand::Register(SizeCode::W, Rt as u16), Operand::Imm16(b as u16), Operand::Offset(imm), @@ -2474,8 +2743,8 @@ impl Decodable for Instruction { 0b01000 => { // conditional branch (imm) let imm = (word >> 3) & 0x001ffffc; let cond = word & 0x0f; - self.opcode = Opcode::Bcc(cond as u8); - self.operands = [ + inst.opcode = Opcode::Bcc(cond as u8); + inst.operands = [ Operand::Offset(imm), Operand::Nothing, Operand::Nothing, @@ -2483,15 +2752,15 @@ impl Decodable for Instruction { ]; } 0b01001 => { // conditional branch (imm) - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } /* 0b01010 to 0b01111 seem all invalid? */ 0b10000 | 0b10001 | 0b10010 | 0b10011 => { // unconditional branch (imm) - self.opcode = Opcode::BL; - self.operands = [ + inst.opcode = Opcode::BL; + inst.operands = [ Operand::Offset((word & 0x01ffffff) << 2), Operand::Nothing, Operand::Nothing, @@ -2499,10 +2768,10 @@ impl Decodable for Instruction { ]; }, 0b10100 => { // compare branch (imm) - self.opcode = Opcode::CBZ; + inst.opcode = Opcode::CBZ; let imm = (word >> 3) & 0x001ffffc; let Rt = word & 0x1f; - self.operands = [ + inst.operands = [ Operand::Register(SizeCode::X, Rt as u16), Operand::Offset(imm), Operand::Nothing, @@ -2510,10 +2779,10 @@ impl Decodable for Instruction { ]; }, 0b10101 => { // compare branch (imm) - self.opcode = Opcode::CBNZ; + inst.opcode = Opcode::CBNZ; let imm = (word >> 3) & 0x001ffffc; let Rt = word & 0x1f; - self.operands = [ + inst.operands = [ Operand::Register(SizeCode::X, Rt as u16), Operand::Offset(imm), Operand::Nothing, @@ -2524,8 +2793,8 @@ impl Decodable for Instruction { let imm = (word >> 3) & 0x0003fffc; let b = (word >> 19) & 0x1f; let Rt = word & 0x1f; - self.opcode = Opcode::TBZ; - self.operands = [ + inst.opcode = Opcode::TBZ; + inst.operands = [ Operand::Register(SizeCode::X, Rt as u16), Operand::Imm16((b as u16) | 0x20), Operand::Offset(imm), @@ -2536,8 +2805,8 @@ impl Decodable for Instruction { let imm = (word >> 3) & 0x0003fffc; let b = (word >> 19) & 0x1f; let Rt = word & 0x1f; - self.opcode = Opcode::TBNZ; - self.operands = [ + inst.opcode = Opcode::TBNZ; + inst.operands = [ Operand::Register(SizeCode::X, Rt as u16), Operand::Imm16((b as u16) | 0x20), Operand::Offset(imm), @@ -2550,35 +2819,35 @@ impl Decodable for Instruction { let opc = (word >> 21) & 0x7; match (opc, op2, ll) { (0b000, 0b000, 0b01) => { - self.opcode = Opcode::SVC; + inst.opcode = Opcode::SVC; } (0b000, 0b000, 0b10) => { - self.opcode = Opcode::HVC; + inst.opcode = Opcode::HVC; } (0b000, 0b000, 0b11) => { - self.opcode = Opcode::SMC; + inst.opcode = Opcode::SMC; } (0b001, 0b000, 0b00) => { - self.opcode = Opcode::BRK; + inst.opcode = Opcode::BRK; } (0b010, 0b000, 0b00) => { - self.opcode = Opcode::HLT; + inst.opcode = Opcode::HLT; } (0b101, 0b000, 0b01) => { - self.opcode = Opcode::DCPS1; + inst.opcode = Opcode::DCPS1; } (0b101, 0b000, 0b10) => { - self.opcode = Opcode::DCPS2; + inst.opcode = Opcode::DCPS2; } (0b101, 0b000, 0b11) => { - self.opcode = Opcode::DCPS3; + inst.opcode = Opcode::DCPS3; } _ => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } } let imm = (word >> 5) & 0xffff; - self.operands = [ + inst.operands = [ Operand::Imm16(imm as u16), Operand::Nothing, Operand::Nothing, @@ -2588,7 +2857,7 @@ impl Decodable for Instruction { 0b11001 => { // system let remainder = word & 0xffffff; if remainder >= 0x400000 { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } else { let Rt = word & 0x1f; let Lop0 = ((word >> 19) & 0x7) as u8; @@ -2603,65 +2872,65 @@ impl Decodable for Instruction { match CRn { 0b0010 => { if op1 == 0b011 { - self.opcode = Opcode::HINT(op2 as u8); + inst.opcode = Opcode::HINT(op2 as u8); } else { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } }, 0b0011 => { match op2 { 0b010 => { - self.opcode = Opcode::CLREX; + inst.opcode = Opcode::CLREX; }, 0b100 => { - self.opcode = Opcode::DSB; + inst.opcode = Opcode::DSB; }, 0b101 => { - self.opcode = Opcode::DMB; + inst.opcode = Opcode::DMB; }, 0b110 => { - self.opcode = Opcode::ISB; + inst.opcode = Opcode::ISB; } _ => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } }; }, 0b0100 => { - self.opcode = Opcode::MSRa(op1 as u8, op2 as u8); - self.operands[0] = Operand::Imm16( + inst.opcode = Opcode::MSRa(op1 as u8, op2 as u8); + inst.operands[0] = Operand::Imm16( ((word >> 8) & 0xf) as u16 ); } _ => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } } } else { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } } 0b001 => { - self.opcode = Opcode::SYS; + inst.opcode = Opcode::SYS; panic!("TODO"); } 0b010 | 0b011 => { - self.opcode = Opcode::MSRb(word & 0x0fffff); + inst.opcode = Opcode::MSRb(word & 0x0fffff); } 0b100 => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } 0b101 => { - self.opcode = Opcode::SYSL; + inst.opcode = Opcode::SYSL; panic!("TODO"); } 0b110 | 0b111 => { - self.opcode = Opcode::MRS(word & 0x0fffff); + inst.opcode = Opcode::MRS(word & 0x0fffff); } _ => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } } } @@ -2673,68 +2942,68 @@ impl Decodable for Instruction { 0b000 => { if (word & 0x1ffc1f) == 0x1f0000 { let Rn = (word >> 5) & 0x1f; - self.opcode = Opcode::BR; - self.operands = [ + inst.opcode = Opcode::BR; + inst.operands = [ Operand::Register(SizeCode::X, Rn as u16), Operand::Nothing, Operand::Nothing, Operand::Nothing ]; } else { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } }, 0b001 => { if (word & 0x1ffc1f) == 0x1f0000 { let Rn = (word >> 5) & 0x1f; - self.opcode = Opcode::BLR; - self.operands = [ + inst.opcode = Opcode::BLR; + inst.operands = [ Operand::Register(SizeCode::X, Rn as u16), Operand::Nothing, Operand::Nothing, Operand::Nothing ]; } else { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } }, 0b010 => { if (word & 0x1ffc1f) == 0x1f0000 { let Rn = (word >> 5) & 0x1f; - self.opcode = Opcode::RET; - self.operands = [ + inst.opcode = Opcode::RET; + inst.operands = [ Operand::Register(SizeCode::X, Rn as u16), Operand::Nothing, Operand::Nothing, Operand::Nothing ]; } else { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } }, 0b100 => { if (word & 0x1fffff) == 0x1f03e0 { - self.opcode = Opcode::ERET; + inst.opcode = Opcode::ERET; } else { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } }, 0b101 => { if (word & 0x1fffff) == 0x1f03e0 { - self.opcode = Opcode::DRPS; + inst.opcode = Opcode::DRPS; } else { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } }, _ => { - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } } } 0b11011 => { // unconditional branch (reg) // the last 1 is bit 24, which C3.2.7 indicates are // all invalid encodings (opc is b0101 or lower) - self.opcode = Opcode::Invalid; + inst.opcode = Opcode::Invalid; } _ => { // TODO: invalid |