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-rw-r--r--src/lib.rs371
1 files changed, 171 insertions, 200 deletions
diff --git a/src/lib.rs b/src/lib.rs
index a1f98ae..a8e6491 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -8,7 +8,7 @@ extern crate serde_derive;
use core::fmt;
-use yaxpeax_arch::{Arch, AddressDiff, Decoder, LengthedInstruction};
+use yaxpeax_arch::{Arch, AddressDiff, Decoder, LengthedInstruction, Reader, StandardDecodeError};
#[allow(non_camel_case_types)]
#[derive(Debug, Copy, Clone)]
@@ -650,18 +650,15 @@ impl Instruction {
}
}
-#[cfg(feature="use-serde")]
-#[derive(Debug, Serialize, Deserialize)]
-pub struct M16C;
-
-#[cfg(not(feature="use-serde"))]
+#[cfg_attr(feature="use-serde", derive(Serialize, Deserialize))]
#[derive(Debug)]
pub struct M16C;
impl Arch for M16C {
type Address = u32;
+ type Word = u8;
type Instruction = Instruction;
- type DecodeError = DecodeError;
+ type DecodeError = StandardDecodeError;
type Decoder = InstDecoder;
type Operand = Operand;
}
@@ -704,29 +701,6 @@ impl Default for Instruction {
}
}
-#[derive(Debug, PartialEq)]
-pub enum DecodeError {
- ExhaustedInput,
- InvalidOpcode,
- InvalidOperand,
-}
-
-impl fmt::Display for DecodeError {
- fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
- match self {
- DecodeError::ExhaustedInput => write!(f, "exhausted input"),
- DecodeError::InvalidOpcode => write!(f, "invalid opcode"),
- DecodeError::InvalidOperand => write!(f, "invalid operand"),
- }
- }
-}
-
-impl yaxpeax_arch::DecodeError for DecodeError {
- fn data_exhausted(&self) -> bool { self == &DecodeError::ExhaustedInput }
- fn bad_opcode(&self) -> bool { self == &DecodeError::InvalidOpcode }
- fn bad_operand(&self) -> bool { self == &DecodeError::InvalidOperand }
-}
-
impl yaxpeax_arch::Instruction for Instruction {
// currently only accept instructions that are well-defined.
fn well_defined(&self) -> bool { true }
@@ -741,12 +715,9 @@ impl fmt::Display for InstDecoder {
}
}
-impl Decoder<Instruction> for InstDecoder {
- type Error = DecodeError;
-
- fn decode_into<T: IntoIterator<Item=u8>>(&self, inst: &mut Instruction, bytes: T) -> Result<(), DecodeError> {
- let mut bytes_iter = bytes.into_iter();
- decode(self, inst, &mut bytes_iter)
+impl Decoder<M16C> for InstDecoder {
+ fn decode_into<T: Reader<<M16C as Arch>::Address, <M16C as Arch>::Word>>(&self, inst: &mut Instruction, words: &mut T) -> Result<(), <M16C as Arch>::DecodeError> {
+ decode(self, inst, words)
}
}
@@ -771,8 +742,8 @@ enum OperandInterpretation {
Reinterpret(OperandCategory)
}
-fn decode<T: Iterator<Item=u8>>(_decoder: &InstDecoder, inst: &mut Instruction, bytes: &mut T) -> Result<(), DecodeError> {
- let byte = bytes.next().ok_or(DecodeError::ExhaustedInput)?;
+fn decode<T: Reader<<M16C as Arch>::Address, <M16C as Arch>::Word>>(_decoder: &InstDecoder, inst: &mut Instruction, words: &mut T) -> Result<(), <M16C as Arch>::DecodeError> {
+ let byte = words.next()?;
inst.length += 1;
// IF there is a size bit, it is the low bit of the first byte.
let size = if byte & 1 == 0 {
@@ -909,7 +880,7 @@ fn decode<T: Iterator<Item=u8>>(_decoder: &InstDecoder, inst: &mut Instruction,
0b0111_1100 => (Opcode::NOP, Reinterpret(OperandCategory::Op7C)),
0b0111_1101 => (Opcode::NOP, Reinterpret(OperandCategory::Op7D)),
0b0111_1110 => (Opcode::NOP, Reinterpret(OperandCategory::Op7E)),
- 0b0111_1111 => { return Err(DecodeError::InvalidOperand); },
+ 0b0111_1111 => { return Err(StandardDecodeError::InvalidOperand); },
0b1000_0000 => (Opcode::TST(size), Reinterpret(OperandCategory::SrcDestRegOrDeref)),
0b1000_0001 => (Opcode::TST(size), Reinterpret(OperandCategory::SrcDestRegOrDeref)),
0b1000_0010 => (Opcode::PUSH(Size::B), Just([OperandSpec::R0L, OperandSpec::Nothing, OperandSpec::Nothing])),
@@ -1029,7 +1000,7 @@ fn decode<T: Iterator<Item=u8>>(_decoder: &InstDecoder, inst: &mut Instruction,
0b1111_0100 => (Opcode::JMP(Size::W), Just([OperandSpec::JmpDisp16, OperandSpec::Nothing, OperandSpec::Nothing])),
0b1111_0101 => (Opcode::JSR(Size::W), Just([OperandSpec::JmpDisp16, OperandSpec::Nothing, OperandSpec::Nothing])),
0b1111_0110 => (Opcode::INTO, Just([OperandSpec::Nothing, OperandSpec::Nothing, OperandSpec::Nothing])),
- 0b1111_0111 => { return Err(DecodeError::InvalidOperand); },
+ 0b1111_0111 => { return Err(StandardDecodeError::InvalidOperand); },
0b1111_1000 => (Opcode::ADJNZ(size), Reinterpret(OperandCategory::ADJNZ)),
0b1111_1001 => (Opcode::ADJNZ(size), Reinterpret(OperandCategory::ADJNZ)),
0b1111_1010 => (Opcode::DEC(Size::W), Just([OperandSpec::A1, OperandSpec::Nothing, OperandSpec::Nothing])),
@@ -1050,7 +1021,7 @@ fn decode<T: Iterator<Item=u8>>(_decoder: &InstDecoder, inst: &mut Instruction,
// additionally, Imm8 or Imm16 is the first operand, if present. so look for that
// first.
if let OperandSpec::Imm8 = inst.operands[0] {
- inst.imm_wide = read_imm(bytes, 1)? as u32;
+ inst.imm_wide = read_imm(words, 1)? as u32;
inst.length += 1;
}
@@ -1060,7 +1031,7 @@ fn decode<T: Iterator<Item=u8>>(_decoder: &InstDecoder, inst: &mut Instruction,
use OperandSpec::*;
match op {
RegList => {
- inst.imm_wide = read_imm(bytes, 1)? as u32;
+ inst.imm_wide = read_imm(words, 1)? as u32;
inst.length += 1;
// internally, the register list is given one order.
@@ -1082,17 +1053,17 @@ fn decode<T: Iterator<Item=u8>>(_decoder: &InstDecoder, inst: &mut Instruction,
Disp8_FB |
Disp8_SB => {
// have to sign extend in case these displacements are negative
- inst.dispabs = read_imm(bytes, 1)? as i8 as i16 as u16;
+ inst.dispabs = read_imm(words, 1)? as i8 as i16 as u16;
inst.length += 1;
}
JmpDisp16 |
Abs16 => {
- inst.dispabs = read_imm(bytes, 2)? as u16;
+ inst.dispabs = read_imm(words, 2)? as u16;
inst.length += 2;
}
JmpAbs20 |
Abs20 => {
- inst.imm_wide = read_imm(bytes, 3)? as u32 & 0x0f_ff_ff;
+ inst.imm_wide = read_imm(words, 3)? as u32 & 0x0f_ff_ff;
inst.length += 3;
}
Disp8_A0 |
@@ -1131,45 +1102,45 @@ fn decode<T: Iterator<Item=u8>>(_decoder: &InstDecoder, inst: &mut Instruction,
// now for STZX, really,...
if let OperandSpec::Imm82 = inst.operands[2] {
- inst.imm_wide |= (bytes.next().ok_or(DecodeError::ExhaustedInput)? as u32) << 8;
+ inst.imm_wide |= (words.next()? as u32) << 8;
inst.length += 1;
}
return Ok(());
},
Reinterpret(OperandCategory::Op74) => {
- return decode_op74(inst, size, bytes);
+ return decode_op74(inst, size, words);
},
Reinterpret(OperandCategory::Op76) => {
- return decode_op76(inst, size, bytes);
+ return decode_op76(inst, size, words);
},
Reinterpret(OperandCategory::Op78) => {
- return decode_op78(inst, size, bytes);
+ return decode_op78(inst, size, words);
},
Reinterpret(OperandCategory::Op7A) => {
- return decode_op7A(inst, size, bytes);
+ return decode_op7A(inst, size, words);
},
Reinterpret(OperandCategory::Op7B) => {
- return decode_op7B(inst, size, bytes);
+ return decode_op7B(inst, size, words);
},
Reinterpret(OperandCategory::Op7C) => {
- return decode_op7C(inst, size, bytes);
+ return decode_op7C(inst, size, words);
},
Reinterpret(OperandCategory::Op7D) => {
- return decode_op7D(inst, size, bytes);
+ return decode_op7D(inst, size, words);
},
Reinterpret(OperandCategory::Op7E) => {
- return decode_op7E(inst, size, bytes);
+ return decode_op7E(inst, size, words);
},
Reinterpret(OperandCategory::OpEB) => {
- return decode_opEB(inst, size, bytes);
+ return decode_opEB(inst, size, words);
},
Reinterpret(OperandCategory::Imm4Dest) => {
- let operands = bytes.next().ok_or(DecodeError::ExhaustedInput)?;
+ let operands = words.next()?;
inst.length += 1;
inst.imm_wide = (operands as i8 >> 4) as i32 as u32;
inst.operands[0] = OperandSpec::Imm4;
- inst.operands[1] = Operand_RegDerefDispAbs(operands & 0b1111, size, inst, bytes)?;
+ inst.operands[1] = Operand_RegDerefDispAbs(operands & 0b1111, size, inst, words)?;
inst.operands[2] = OperandSpec::Nothing;
}
Reinterpret(OperandCategory::JmpDispOpcodeLow3) => {
@@ -1181,149 +1152,149 @@ fn decode<T: Iterator<Item=u8>>(_decoder: &InstDecoder, inst: &mut Instruction,
Reinterpret(OperandCategory::ADJNZ) => {
// ADJNZ has operands like any other [IMM4|DEST] operand, but takes an additional byte
// for the destination label.
- let operands = bytes.next().ok_or(DecodeError::ExhaustedInput)?;
+ let operands = words.next()?;
inst.length += 1;
inst.imm_wide = ((operands as i8) >> 4) as u32;
inst.operands[0] = OperandSpec::Imm4;
- inst.operands[1] = Operand_RegDerefDispAbs(operands & 0b1111, size, inst, bytes)?;
+ inst.operands[1] = Operand_RegDerefDispAbs(operands & 0b1111, size, inst, words)?;
inst.operands[2] = OperandSpec::Label8;
}
Reinterpret(OperandCategory::SrcDestRegOrDeref) => {
// these instructions can read two disp8/disp16, so the first one can be handled
// normally, but the second will need some fixing up...
- let operands = bytes.next().ok_or(DecodeError::ExhaustedInput)?;
+ let operands = words.next()?;
inst.length += 1;
- inst.operands[0] = Operand_RegDerefDispAbs(operands >> 4, size, inst, bytes)?;
- inst.operands[1] = Operand_second_RegDerefDispAbs(operands & 0b1111, size, inst, bytes)?;
+ inst.operands[0] = Operand_RegDerefDispAbs(operands >> 4, size, inst, words)?;
+ inst.operands[1] = Operand_second_RegDerefDispAbs(operands & 0b1111, size, inst, words)?;
inst.operands[2] = OperandSpec::Nothing;
}
}
Ok(())
}
-fn decode_op74<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes: &mut T) -> Result<(), DecodeError> {
- let byte = bytes.next().ok_or(DecodeError::ExhaustedInput)?;
+fn decode_op74<T: Reader<<M16C as Arch>::Address, <M16C as Arch>::Word>>(inst: &mut Instruction, size: Size, words: &mut T) -> Result<(), <M16C as Arch>::DecodeError> {
+ let byte = words.next()?;
inst.length += 1;
match byte >> 4 {
0b0000 => {
inst.opcode = Opcode::STE;
- inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
inst.operands[1] = OperandSpec::Abs20;
- inst.imm_wide = read_imm(bytes, 3)? & 0x0f_ff_ff;
+ inst.imm_wide = read_imm(words, 3)? & 0x0f_ff_ff;
inst.length += 3;
}
0b0001 => {
inst.opcode = Opcode::STE;
- inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
inst.operands[1] = OperandSpec::Disp20_A0;
- inst.imm_wide = read_imm(bytes, 3)? & 0x0f_ff_ff;
+ inst.imm_wide = read_imm(words, 3)? & 0x0f_ff_ff;
inst.length += 3;
}
0b0010 => {
inst.opcode = Opcode::STE;
- inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
inst.operands[1] = OperandSpec::Deref_A1A0;
}
0b0011 => {
inst.opcode = Opcode::MOV(size);
- inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
inst.operands[1] = OperandSpec::Disp8_SP;
}
0b0100 => {
inst.opcode = Opcode::PUSH(size);
- inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
inst.operands[1] = OperandSpec::Nothing;
}
0b0101 => {
inst.opcode = Opcode::NEG;
- inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
inst.operands[1] = OperandSpec::Nothing;
}
0b0110 => {
inst.opcode = Opcode::ROT(size);
if size == Size::W && byte & 0b1111 == 0b0001 {
// invalid dest, would be R1
- return Err(DecodeError::InvalidOperand);
+ return Err(StandardDecodeError::InvalidOperand);
} else if size == Size::B && byte & 0b1111 == 0b0011 {
// invalid dest, would be R1H
- return Err(DecodeError::InvalidOperand);
+ return Err(StandardDecodeError::InvalidOperand);
}
inst.operands[0] = OperandSpec::R1H;
- inst.operands[1] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[1] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
}
0b0111 => {
inst.opcode = Opcode::NOT(size);
- inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
inst.operands[1] = OperandSpec::Nothing;
}
0b1000 => {
inst.opcode = Opcode::LDE;
inst.operands[0] = OperandSpec::Abs20;
- inst.operands[1] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[1] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
// careful! abs20 comes after dest disp/abs
- inst.imm_wide = read_imm(bytes, 3)? & 0x0f_ff_ff;
+ inst.imm_wide = read_imm(words, 3)? & 0x0f_ff_ff;
inst.length += 3;
}
0b1001 => {
inst.opcode = Opcode::LDE;
inst.operands[0] = OperandSpec::Disp20_A0;
- inst.operands[1] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[1] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
// careful! disp20 comes after dest disp/abs
- inst.imm_wide = read_imm(bytes, 3)? & 0x0f_ff_ff;
+ inst.imm_wide = read_imm(words, 3)? & 0x0f_ff_ff;
inst.length += 3;
}
0b1010 => {
inst.opcode = Opcode::LDE;
inst.operands[0] = OperandSpec::Deref_A1A0;
- inst.operands[1] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[1] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
}
0b1011 => {
inst.opcode = Opcode::MOV(size);
inst.operands[0] = OperandSpec::Disp8_SP;
- inst.operands[1] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[1] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
// careful! disp8 comes after dest disp/abs
- inst.dispabs = read_imm(bytes, 1)? as u16;
+ inst.dispabs = read_imm(words, 1)? as u16;
inst.length += 1;
}
0b1100 => {
inst.opcode = Opcode::MOV(size);
inst.operands[0] = if size == Size::W { OperandSpec::Imm16 } else { OperandSpec::Imm8 };
- inst.operands[1] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[1] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
// careful! imm comes after dest disp/abs
- inst.imm_wide = read_imm(bytes, size.as_bytes())? as u32;
+ inst.imm_wide = read_imm(words, size.as_bytes())? as u32;
inst.length += size.as_bytes();
}
0b1101 => {
inst.opcode = Opcode::POP;
- inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
inst.operands[1] = OperandSpec::Nothing;
}
0b1110 => {
inst.opcode = Opcode::SHL(size);
if size == Size::W && byte & 0b1111 == 0b0001 {
// invalid dest, would be R1
- return Err(DecodeError::InvalidOperand);
+ return Err(StandardDecodeError::InvalidOperand);
} else if size == Size::B && byte & 0b1111 == 0b0011 {
// invalid dest, would be R1H
- return Err(DecodeError::InvalidOperand);
+ return Err(StandardDecodeError::InvalidOperand);
}
inst.operands[0] = OperandSpec::R1H;
- inst.operands[1] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[1] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
}
0b1111 => {
inst.opcode = Opcode::SHA(size);
if size == Size::W && byte & 0b1111 == 0b0001 {
// invalid dest, would be R1
- return Err(DecodeError::InvalidOperand);
+ return Err(StandardDecodeError::InvalidOperand);
} else if size == Size::B && byte & 0b1111 == 0b0011 {
// invalid dest, would be R1H
- return Err(DecodeError::InvalidOperand);
+ return Err(StandardDecodeError::InvalidOperand);
}
inst.operands[0] = OperandSpec::R1H;
- inst.operands[1] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[1] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
}
_ => {
unreachable!("opcode selector is four bits");
@@ -1333,8 +1304,8 @@ fn decode_op74<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes:
Ok(())
}
-fn decode_op76<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes: &mut T) -> Result<(), DecodeError> {
- let byte = bytes.next().ok_or(DecodeError::ExhaustedInput)?;
+fn decode_op76<T: Reader<<M16C as Arch>::Address, <M16C as Arch>::Word>>(inst: &mut Instruction, size: Size, words: &mut T) -> Result<(), <M16C as Arch>::DecodeError> {
+ let byte = words.next()?;
inst.length += 1;
let opc_selector = byte >> 4;
if opc_selector < 0b1001 {
@@ -1343,49 +1314,49 @@ fn decode_op76<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes:
Opcode::OR(size), Opcode::ADD(size), Opcode::SUB(size),
Opcode::ADC(size), Opcode::SBB(size), Opcode::CMP(size)
][opc_selector as usize];
- inst.operands[1] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[1] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
inst.operands[0] = if size == Size::W { OperandSpec::Imm16 } else { OperandSpec::Imm8 };
- inst.imm_wide = read_imm(bytes, size.as_bytes())?;
+ inst.imm_wide = read_imm(words, size.as_bytes())?;
inst.length += size.as_bytes();
} else {
match opc_selector {
0b1001 => {
inst.opcode = Opcode::DIVX(size);
inst.operands[0] = if size == Size::W { OperandSpec::Imm16 } else { OperandSpec::Imm8 };
- inst.imm_wide = read_imm(bytes, size.as_bytes())?;
+ inst.imm_wide = read_imm(words, size.as_bytes())?;
inst.length += size.as_bytes();
}
0b1010 => {
inst.opcode = Opcode::ROLC;
- inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
inst.operands[1] = OperandSpec::Nothing;
}
0b1011 => {
inst.opcode = Opcode::RORC;
- inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
inst.operands[1] = OperandSpec::Nothing;
}
0b1100 => {
inst.opcode = Opcode::DIVU(size);
inst.operands[0] = if size == Size::W { OperandSpec::Imm16 } else { OperandSpec::Imm8 };
- inst.imm_wide = read_imm(bytes, size.as_bytes())?;
+ inst.imm_wide = read_imm(words, size.as_bytes())?;
inst.length += size.as_bytes();
}
0b1101 => {
inst.opcode = Opcode::DIV(size);
- inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
inst.operands[1] = OperandSpec::Nothing;
}
0b1110 => {
inst.opcode = Opcode::ADCF(size);
- inst.operands[1] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[1] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
inst.operands[0] = if size == Size::W { OperandSpec::Imm16 } else { OperandSpec::Imm8 };
- inst.imm_wide = read_imm(bytes, size.as_bytes())?;
+ inst.imm_wide = read_imm(words, size.as_bytes())?;
inst.length += size.as_bytes();
}
0b1111 => {
inst.opcode = Opcode::ABS;
- inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
inst.operands[1] = OperandSpec::Nothing;
}
_ => {
@@ -1397,74 +1368,74 @@ fn decode_op76<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes:
Ok(())
}
-fn decode_op78<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes: &mut T) -> Result<(), DecodeError> {
- let byte = bytes.next().ok_or(DecodeError::ExhaustedInput)?;
+fn decode_op78<T: Reader<<M16C as Arch>::Address, <M16C as Arch>::Word>>(inst: &mut Instruction, size: Size, words: &mut T) -> Result<(), <M16C as Arch>::DecodeError> {
+ let byte = words.next()?;
inst.length += 1;
inst.opcode = Opcode::MUL;
- inst.operands[0] = Operand_RegDerefDispAbs(byte >> 4, size, inst, bytes)?;
+ inst.operands[0] = Operand_RegDerefDispAbs(byte >> 4, size, inst, words)?;
let dest_code = byte & 0b1111;
match (size, dest_code) {
(Size::B, 0b0001) |
(Size::W, 0b0010) |
(_, 0b0011) |
(_, 0b0101) => {
- return Err(DecodeError::InvalidOperand);
+ return Err(StandardDecodeError::InvalidOperand);
}
_ => {}
}
- inst.operands[1] = Operand_RegDerefDispAbs(dest_code, size, inst, bytes)?;
+ inst.operands[1] = Operand_RegDerefDispAbs(dest_code, size, inst, words)?;
Ok(())
}
-fn decode_op7A<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes: &mut T) -> Result<(), DecodeError> {
- let byte = bytes.next().ok_or(DecodeError::ExhaustedInput)?;
+fn decode_op7A<T: Reader<<M16C as Arch>::Address, <M16C as Arch>::Word>>(inst: &mut Instruction, size: Size, words: &mut T) -> Result<(), <M16C as Arch>::DecodeError> {
+ let byte = words.next()?;
inst.length += 1;
if byte >= 0b10000000 {
inst.opcode = Opcode::LDC;
- inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
inst.operands[1] = Operand_IntFlgSpSbFb((byte >> 4) & 0b111)?;
} else {
inst.opcode = Opcode::XCHG(size);
assert_eq!(size, Size::B);
if byte >= 0b01000000 {
- return Err(DecodeError::InvalidOperand);
+ return Err(StandardDecodeError::InvalidOperand);
}
inst.operands[0] = [
OperandSpec::R0L, OperandSpec::R0H,
OperandSpec::R1L, OperandSpec::R1H,
][(byte >> 4) as usize];
- inst.operands[1] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[1] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
}
Ok(())
}
-fn decode_op7B<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes: &mut T) -> Result<(), DecodeError> {
- let byte = bytes.next().ok_or(DecodeError::ExhaustedInput)?;
+fn decode_op7B<T: Reader<<M16C as Arch>::Address, <M16C as Arch>::Word>>(inst: &mut Instruction, size: Size, words: &mut T) -> Result<(), <M16C as Arch>::DecodeError> {
+ let byte = words.next()?;
inst.length += 1;
if byte >= 0b10000000 {
inst.opcode = Opcode::STC;
inst.operands[1] = Operand_IntFlgSpSbFb((byte >> 4) & 0b111)?;
- inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
} else {
inst.opcode = Opcode::XCHG(size);
assert_eq!(size, Size::W);
if byte >= 0b01000000 {
- return Err(DecodeError::InvalidOperand);
+ return Err(StandardDecodeError::InvalidOperand);
}
inst.operands[0] = [
OperandSpec::R0, OperandSpec::R1,
OperandSpec::R2, OperandSpec::R3,
][(byte >> 4) as usize];
- inst.operands[1] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[1] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
}
Ok(())
}
-fn decode_op7C<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes: &mut T) -> Result<(), DecodeError> {
- let byte = bytes.next().ok_or(DecodeError::ExhaustedInput)?;
+fn decode_op7C<T: Reader<<M16C as Arch>::Address, <M16C as Arch>::Word>>(inst: &mut Instruction, size: Size, words: &mut T) -> Result<(), <M16C as Arch>::DecodeError> {
+ let byte = words.next()?;
inst.length += 1;
match byte >> 4 {
op @ 0b0000 |
@@ -1475,43 +1446,43 @@ fn decode_op7C<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes:
Opcode::MOVLL, Opcode::MOVLH,
Opcode::MOVHL, Opcode::MOVHH,
][op as usize];
- inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
inst.operands[1] = OperandSpec::R0L;
},
0b0100 => {
inst.opcode = Opcode::MULU(size);
inst.operands[0] = if size == Size::W { OperandSpec::Imm16 } else { OperandSpec::Imm8 };
- inst.operands[1] = Operand_RegDerefDispAbs(byte >> 4, size, inst, bytes)?;
+ inst.operands[1] = Operand_RegDerefDispAbs(byte >> 4, size, inst, words)?;
let dest_code = byte & 0b1111;
match (size, dest_code) {
(Size::B, 0b0001) |
(Size::W, 0b0010) |
(_, 0b0011) |
(_, 0b0101) => {
- return Err(DecodeError::InvalidOperand);
+ return Err(StandardDecodeError::InvalidOperand);
}
_ => {}
}
// careful! imm comes after dest disp/abs
- inst.imm_wide = read_imm(bytes, size.as_bytes())?;
+ inst.imm_wide = read_imm(words, size.as_bytes())?;
inst.length += size.as_bytes();
},
0b0101 => {
inst.opcode = Opcode::MUL;
inst.operands[0] = if size == Size::W { OperandSpec::Imm16 } else { OperandSpec::Imm8 };
- inst.operands[1] = Operand_RegDerefDispAbs(byte >> 4, size, inst, bytes)?;
+ inst.operands[1] = Operand_RegDerefDispAbs(byte >> 4, size, inst, words)?;
let dest_code = byte & 0b1111;
match (size, dest_code) {
(Size::B, 0b0001) |
(Size::W, 0b0010) |
(_, 0b0011) |
(_, 0b0101) => {
- return Err(DecodeError::InvalidOperand);
+ return Err(StandardDecodeError::InvalidOperand);
}
_ => {}
}
// careful! imm comes after dest disp/abs
- inst.imm_wide = read_imm(bytes, size.as_bytes())?;
+ inst.imm_wide = read_imm(words, size.as_bytes())?;
inst.length += size.as_bytes();
}
0b0110 => {
@@ -1522,11 +1493,11 @@ fn decode_op7C<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes:
0b0011 |
0b0100 |
0b0101 => {
- return Err(DecodeError::InvalidOperand);
+ return Err(StandardDecodeError::InvalidOperand);
}
_ => {}
}
- inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
inst.operands[1] = OperandSpec::Nothing;
}
op @ 0b1000 |
@@ -1538,7 +1509,7 @@ fn decode_op7C<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes:
Opcode::MOVHL, Opcode::MOVHH,
][(op & 0b11) as usize];
inst.operands[0] = OperandSpec::R0L;
- inst.operands[1] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[1] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
}
0b1100 => {
inst.opcode = Opcode::EXTS;
@@ -1546,13 +1517,13 @@ fn decode_op7C<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes:
0b0010 |
0b0011 |
0b0101 => {
- return Err(DecodeError::InvalidOperand);
+ return Err(StandardDecodeError::InvalidOperand);
}
0b0000 => OperandSpec::R2R0,
0b0001 => OperandSpec::R3R1,
0b0100 => OperandSpec::A1A0,
code => {
- Operand_RegDerefDispAbs(code, size, inst, bytes)?
+ Operand_RegDerefDispAbs(code, size, inst, words)?
}
};
inst.operands[0] = dest;
@@ -1573,7 +1544,7 @@ fn decode_op7C<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes:
inst.operands[0] = if size == Size::W { OperandSpec::Imm16 } else { OperandSpec::Imm8 };
inst.operands[1] = OperandSpec::Nothing;
inst.operands[2] = OperandSpec::Nothing;
- inst.imm_wide = read_imm(bytes, size.as_bytes())?;
+ inst.imm_wide = read_imm(words, size.as_bytes())?;
inst.length += size.as_bytes();
}
op @ 0b1000 |
@@ -1590,7 +1561,7 @@ fn decode_op7C<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes:
inst.operands[0] = if size == Size::W { OperandSpec::Imm16 } else { OperandSpec::Imm8 };
inst.operands[1] = OperandSpec::SP;
inst.operands[2] = OperandSpec::Nothing;
- inst.imm_wide = read_imm(bytes, size.as_bytes())?;
+ inst.imm_wide = read_imm(words, size.as_bytes())?;
inst.length += size.as_bytes();
}
_ => { unreachable!("this should be an invalid bit pattern"); }
@@ -1609,7 +1580,7 @@ fn decode_op7C<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes:
inst.operands[0] = OperandSpec::Imm8;
inst.operands[1] = OperandSpec::R0L;
assert_eq!(size, Size::B);
- inst.imm_wide = read_imm(bytes, size.as_bytes())?;
+ inst.imm_wide = read_imm(words, size.as_bytes())?;
inst.length += size.as_bytes();
}
}
@@ -1619,10 +1590,10 @@ fn decode_op7C<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes:
0b0000 => {
inst.opcode = Opcode::LDCTX;
inst.operands[0] = OperandSpec::Abs16;
- inst.dispabs = read_imm(bytes, 2)? as u16;
+ inst.dispabs = read_imm(words, 2)? as u16;
inst.length += 2;
inst.operands[1] = OperandSpec::Abs20;
- inst.imm_wide = read_imm(bytes, 3)? & 0x0f_ff_ff;
+ inst.imm_wide = read_imm(words, 3)? & 0x0f_ff_ff;
inst.length += 3;
}
0b0001 => {
@@ -1633,7 +1604,7 @@ fn decode_op7C<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes:
0b0010 => {
inst.opcode = Opcode::ENTER;
inst.operands[0] = OperandSpec::Imm8;
- inst.imm_wide = read_imm(bytes, 1)?;
+ inst.imm_wide = read_imm(words, 1)?;
inst.length += 1;
inst.operands[1] = OperandSpec::Nothing;
}
@@ -1643,20 +1614,20 @@ fn decode_op7C<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes:
inst.operands[1] = OperandSpec::Nothing;
}
_ => {
- return Err(DecodeError::InvalidOpcode);
+ return Err(StandardDecodeError::InvalidOpcode);
}
}
}
_ => {
- return Err(DecodeError::InvalidOpcode);
+ return Err(StandardDecodeError::InvalidOpcode);
}
}
Ok(())
}
-fn decode_op7D<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes: &mut T) -> Result<(), DecodeError> {
- let byte = bytes.next().ok_or(DecodeError::ExhaustedInput)?;
+fn decode_op7D<T: Reader<<M16C as Arch>::Address, <M16C as Arch>::Word>>(inst: &mut Instruction, size: Size, words: &mut T) -> Result<(), <M16C as Arch>::DecodeError> {
+ let byte = words.next()?;
inst.length += 1;
match byte >> 4 {
op @ 0b0000 |
@@ -1667,60 +1638,60 @@ fn decode_op7D<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes:
Opcode::JMPI, Opcode::JSRI,
Opcode::JMPI, Opcode::JSRI,
][op as usize];
- inst.operands[0] = Operand_RegDerefDisp20Abs(byte & 0b1111, inst, bytes)?;
+ inst.operands[0] = Operand_RegDerefDisp20Abs(byte & 0b1111, inst, words)?;
inst.operands[1] = OperandSpec::Nothing;
}
0b0100 => {
inst.opcode = Opcode::MULU(size);
inst.operands[0] = if size == Size::W { OperandSpec::Imm16 } else { OperandSpec::Imm8 };
- inst.operands[1] = Operand_RegDerefDispAbs(byte >> 4, size, inst, bytes)?;
+ inst.operands[1] = Operand_RegDerefDispAbs(byte >> 4, size, inst, words)?;
let dest_code = byte & 0b1111;
match (size, dest_code) {
(Size::B, 0b0001) |
(Size::W, 0b0010) |
(_, 0b0011) |
(_, 0b0101) => {
- return Err(DecodeError::InvalidOperand);
+ return Err(StandardDecodeError::InvalidOperand);
}
_ => {}
}
// careful! imm comes after dest disp/abs
- inst.imm_wide = read_imm(bytes, size.as_bytes())?;
+ inst.imm_wide = read_imm(words, size.as_bytes())?;
inst.length += size.as_bytes();
},
0b0101 => {
inst.opcode = Opcode::MUL;
inst.operands[0] = if size == Size::W { OperandSpec::Imm16 } else { OperandSpec::Imm8 };
- inst.operands[1] = Operand_RegDerefDispAbs(byte >> 4, size, inst, bytes)?;
+ inst.operands[1] = Operand_RegDerefDispAbs(byte >> 4, size, inst, words)?;
let dest_code = byte & 0b1111;
match (size, dest_code) {
(Size::B, 0b0001) |
(Size::W, 0b0010) |
(_, 0b0011) |
(_, 0b0101) => {
- return Err(DecodeError::InvalidOperand);
+ return Err(StandardDecodeError::InvalidOperand);
}
_ => {}
}
// careful! imm comes after dest disp/abs
- inst.imm_wide = read_imm(bytes, size.as_bytes())?;
+ inst.imm_wide = read_imm(words, size.as_bytes())?;
inst.length += size.as_bytes();
}
0b1001 => {
// byte is 0b1001_xxxx
if byte < 0b1001_1000 {
- return Err(DecodeError::InvalidOperand);
+ return Err(StandardDecodeError::InvalidOperand);
}
// byte is 0b1001_1xxx
inst.opcode = Opcode::PUSHA;
// while the low eight forms of this encoding are invalid, they would have been rejected above.
- inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, bytes)?;
+ inst.operands[0] = Operand_RegDerefDispAbs(byte & 0b1111, size, inst, words)?;
inst.operands[1] = OperandSpec::Nothing;
}
0b1010 => {
if byte >= 0b1010_1000 {
- return Err(DecodeError::InvalidOperand);
+ return Err(StandardDecodeError::InvalidOperand);
}
inst.opcode = Opcode::LDIPL;
inst.operands[0] = OperandSpec::Imm8;
@@ -1743,18 +1714,18 @@ fn decode_op7D<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes:
0b1101 => Opcode::JNO,
0b1110 => Opcode::JLT,
_ => {
- return Err(DecodeError::InvalidOpcode);
+ return Err(StandardDecodeError::InvalidOpcode);
}
};
inst.operands[0] = OperandSpec::Disp8;
inst.operands[1] = OperandSpec::Nothing;
- inst.imm_wide = read_imm(bytes, 1)?;
+ inst.imm_wide = read_imm(words, 1)?;
inst.length += 1;
}
0b1101 => {
let code = byte & 0b1111;
if code == 0b1011 || code == 0b1111 {
- return Err(DecodeError::InvalidOpcode);
+ return Err(StandardDecodeError::InvalidOpcode);
}
// the NOP here fill gaps that are invalid encodings as tested above.
inst.opcode = [
@@ -1781,7 +1752,7 @@ fn decode_op7D<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes:
inst.operands[0] = if size == Size::W { OperandSpec::Imm16 } else { OperandSpec::Imm8 };
inst.operands[1] = OperandSpec::Nothing;
inst.operands[2] = OperandSpec::Nothing;
- inst.imm_wide = read_imm(bytes, size.as_bytes())?;
+ inst.imm_wide = read_imm(words, size.as_bytes())?;
inst.length += size.as_bytes();
}
op @ 0b1000 |
@@ -1798,7 +1769,7 @@ fn decode_op7D<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes:
inst.operands[0] = if size == Size::W { OperandSpec::Imm16 } else { OperandSpec::Imm8 };
inst.operands[1] = OperandSpec::SP;
inst.operands[2] = OperandSpec::Nothing;
- inst.imm_wide = read_imm(bytes, size.as_bytes())?;
+ inst.imm_wide = read_imm(words, size.as_bytes())?;
inst.length += size.as_bytes();
}
_ => { unreachable!("this should be an invalid bit pattern"); }
@@ -1817,7 +1788,7 @@ fn decode_op7D<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes:
inst.operands[0] = OperandSpec::Imm16;
inst.operands[1] = OperandSpec::R0;
assert_eq!(size, Size::W);
- inst.imm_wide = read_imm(bytes, size.as_bytes())?;
+ inst.imm_wide = read_imm(words, size.as_bytes())?;
inst.length += size.as_bytes();
}
}
@@ -1828,10 +1799,10 @@ fn decode_op7D<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes:
0b0000 => {
inst.opcode = Opcode::STCTX;
inst.operands[0] = OperandSpec::Abs16;
- inst.dispabs = read_imm(bytes, 2)? as u16;
+ inst.dispabs = read_imm(words, 2)? as u16;
inst.length += 2;
inst.operands[1] = OperandSpec::Abs20;
- inst.imm_wide = read_imm(bytes, 3)? & 0x0f_ff_ff;
+ inst.imm_wide = read_imm(words, 3)? & 0x0f_ff_ff;
inst.length += 3;
}
0b0001 => {
@@ -1850,31 +1821,31 @@ fn decode_op7D<T: Iterator<Item=u8>>(inst: &mut Instruction, size: Size, bytes:
inst.operands[1] = OperandSpec::Nothing;
}
_ => {
- return Err(DecodeError::InvalidOpcode);
+ return Err(StandardDecodeError::InvalidOpcode);
}
}
}
_ => {
- return Err(DecodeError::InvalidOpcode);
+ return Err(StandardDecodeError::InvalidOpcode);
}
}
Ok(())
}
-fn decode_op7E<T: Iterator<Item=u8>>(inst: &mut Instruction, _size: Size, bytes: &mut T) -> Result<(), DecodeError> {
- let byte = bytes.next().ok_or(DecodeError::ExhaustedInput)?;
+fn decode_op7E<T: Reader<<M16C as Arch>::Address, <M16C as Arch>::Word>>(inst: &mut Instruction, _size: Size, words: &mut T) -> Result<(), <M16C as Arch>::DecodeError> {
+ let byte = words.next()?;
inst.length += 1;
let op = byte >> 4;
let code = byte & 0b1111;
if op > 0b1101 {
- return Err(DecodeError::InvalidOpcode);
+ return Err(StandardDecodeError::InvalidOpcode);
}
if op == 0b0010 {
// handle BMCMD specifically
- inst.operands[0] = Operand_BitRegDerefDispAbs(code, inst, bytes)?;
+ inst.operands[0] = Operand_BitRegDerefDispAbs(code, inst, words)?;
inst.operands[1] = OperandSpec::Nothing;
- let cnd = read_imm(bytes, 1)? as u8;
+ let cnd = read_imm(words, 1)? as u8;
inst.length += 1;
inst.opcode = match cnd {
0b0000_0000 => Opcode::BMGEU,
@@ -1892,7 +1863,7 @@ fn decode_op7E<T: Iterator<Item=u8>>(inst: &mut Instruction, _size: Size, bytes:
0b1111_1101 => Opcode::BMNO,
0b1111_1110 => Opcode::BMLT,
_ => {
- return Err(DecodeError::InvalidOpcode);
+ return Err(StandardDecodeError::InvalidOpcode);
}
};
} else {
@@ -1903,15 +1874,15 @@ fn decode_op7E<T: Iterator<Item=u8>>(inst: &mut Instruction, _size: Size, bytes:
Opcode::BSET, Opcode::BNOT, Opcode::BTST,
Opcode::BXOR, Opcode::BNXOR,
][op as usize];
- inst.operands[0] = Operand_BitRegDerefDispAbs(code, inst, bytes)?;
+ inst.operands[0] = Operand_BitRegDerefDispAbs(code, inst, words)?;
inst.operands[1] = OperandSpec::Nothing;
}
Ok(())
}
-fn decode_opEB<T: Iterator<Item=u8>>(inst: &mut Instruction, _size: Size, bytes: &mut T) -> Result<(), DecodeError> {
- let byte = bytes.next().ok_or(DecodeError::ExhaustedInput)?;
+fn decode_opEB<T: Reader<<M16C as Arch>::Address, <M16C as Arch>::Word>>(inst: &mut Instruction, _size: Size, words: &mut T) -> Result<(), <M16C as Arch>::DecodeError> {
+ let byte = words.next()?;
inst.length += 1;
let upper = byte >> 4;
let lower = byte & 0b1111;
@@ -1923,7 +1894,7 @@ fn decode_opEB<T: Iterator<Item=u8>>(inst: &mut Instruction, _size: Size, bytes:
inst.opcode = Opcode::LDC;
inst.operands[0] = OperandSpec::Imm16;
inst.operands[1] = Operand_IntFlgSpSbFb((byte >> 4) & 0b111)?;
- inst.imm_wide = read_imm(bytes, 2)?;
+ inst.imm_wide = read_imm(words, 2)?;
inst.length += 2;
}
0b0001 => {
@@ -1955,14 +1926,14 @@ fn decode_opEB<T: Iterator<Item=u8>>(inst: &mut Instruction, _size: Size, bytes:
inst.opcode = Opcode::MOVA;
let src = byte & 0b1111;
if src < 0b1000 {
- return Err(DecodeError::InvalidOperand);
+ return Err(StandardDecodeError::InvalidOperand);
}
- inst.operands[0] = Operand_RegDerefDispAbs(src, Size::W, inst, bytes)?;
+ inst.operands[0] = Operand_RegDerefDispAbs(src, Size::W, inst, words)?;
let dest = byte >> 4;
if dest >= 0b1000 {
- return Err(DecodeError::InvalidOperand);
+ return Err(StandardDecodeError::InvalidOperand);
}
- inst.operands[1] = Operand_RegDerefDispAbs(dest, Size::W, inst, bytes)?;
+ inst.operands[1] = Operand_RegDerefDispAbs(dest, Size::W, inst, words)?;
}
}
} else {
@@ -1983,12 +1954,12 @@ fn decode_opEB<T: Iterator<Item=u8>>(inst: &mut Instruction, _size: Size, bytes:
Ok(())
}
-fn read_imm<T: Iterator<Item=u8>>(bytes: &mut T, mut size: u8) -> Result<u32, DecodeError> {
+fn read_imm<T: Reader<<M16C as Arch>::Address, <M16C as Arch>::Word>>(words: &mut T, mut size: u8) -> Result<u32, <M16C as Arch>::DecodeError> {
let mut imm: u32 = 0;
let mut offset = 0;
while size > 0 {
- imm |= (bytes.next().ok_or(DecodeError::ExhaustedInput)? as u32) << (8 * offset);
+ imm |= (words.next()? as u32) << (8 * offset);
offset += 1;
size -= 1;
}
@@ -1997,7 +1968,7 @@ fn read_imm<T: Iterator<Item=u8>>(bytes: &mut T, mut size: u8) -> Result<u32, De
}
-fn Operand_BitRegDerefDispAbs<T: Iterator<Item=u8>>(code: u8, inst: &mut Instruction, bytes: &mut T) -> Result<OperandSpec, DecodeError> {
+fn Operand_BitRegDerefDispAbs<T: Reader<<M16C as Arch>::Address, <M16C as Arch>::Word>>(code: u8, inst: &mut Instruction, words: &mut T) -> Result<OperandSpec, <M16C as Arch>::DecodeError> {
use OperandSpec::*;
// "bit,<reg>" addressing modes taking their bit selector from a following byte is left mostly
// unspoken in the manual, aside from the "bit,Rn" and "bit,An" modes taking an extra byte.
@@ -2022,11 +1993,11 @@ fn Operand_BitRegDerefDispAbs<T: Iterator<Item=u8>>(code: u8, inst: &mut Instruc
};
if imm_size > 0 {
- inst.dispabs = bytes.next().ok_or(DecodeError::ExhaustedInput)? as u16;
+ inst.dispabs = words.next()? as u16;
inst.length += 1;
if imm_size == 2 {
- inst.dispabs |= (bytes.next().ok_or(DecodeError::ExhaustedInput)? as u16) << 8;
+ inst.dispabs |= (words.next()? as u16) << 8;
inst.length += 1;
}
}
@@ -2035,7 +2006,7 @@ fn Operand_BitRegDerefDispAbs<T: Iterator<Item=u8>>(code: u8, inst: &mut Instruc
}
-fn Operand_RegDerefDispAbs<T: Iterator<Item=u8>>(code: u8, size: Size, inst: &mut Instruction, bytes: &mut T) -> Result<OperandSpec, DecodeError> {
+fn Operand_RegDerefDispAbs<T: Reader<<M16C as Arch>::Address, <M16C as Arch>::Word>>(code: u8, size: Size, inst: &mut Instruction, words: &mut T) -> Result<OperandSpec, <M16C as Arch>::DecodeError> {
use OperandSpec::*;
let (imm_size, spec) = match code {
0b0000 => (0, { if size == Size::B { R0L } else { R0 } }),
@@ -2058,11 +2029,11 @@ fn Operand_RegDerefDispAbs<T: Iterator<Item=u8>>(code: u8, size: Size, inst: &mu
};
if imm_size > 0 {
- inst.dispabs = bytes.next().ok_or(DecodeError::ExhaustedInput)? as u16;
+ inst.dispabs = words.next()? as u16;
inst.length += 1;
if imm_size == 2 {
- inst.dispabs |= (bytes.next().ok_or(DecodeError::ExhaustedInput)? as u16) << 8;
+ inst.dispabs |= (words.next()? as u16) << 8;
inst.length += 1;
}
}
@@ -2070,7 +2041,7 @@ fn Operand_RegDerefDispAbs<T: Iterator<Item=u8>>(code: u8, size: Size, inst: &mu
Ok(spec)
}
-fn Operand_second_RegDerefDispAbs<T: Iterator<Item=u8>>(code: u8, size: Size, inst: &mut Instruction, bytes: &mut T) -> Result<OperandSpec, DecodeError> {
+fn Operand_second_RegDerefDispAbs<T: Reader<<M16C as Arch>::Address, <M16C as Arch>::Word>>(code: u8, size: Size, inst: &mut Instruction, words: &mut T) -> Result<OperandSpec, <M16C as Arch>::DecodeError> {
use OperandSpec::*;
let (imm_size, spec) = match code {
0b0000 => (0, { if size == Size::B { R0L } else { R0 } }),
@@ -2093,11 +2064,11 @@ fn Operand_second_RegDerefDispAbs<T: Iterator<Item=u8>>(code: u8, size: Size, in
};
if imm_size > 0 {
- inst.imm_wide = bytes.next().ok_or(DecodeError::ExhaustedInput)? as u32;
+ inst.imm_wide = words.next()? as u32;
inst.length += 1;
if imm_size == 2 {
- inst.imm_wide |= (bytes.next().ok_or(DecodeError::ExhaustedInput)? as u32) << 8;
+ inst.imm_wide |= (words.next()? as u32) << 8;
inst.length += 1;
}
}
@@ -2105,15 +2076,15 @@ fn Operand_second_RegDerefDispAbs<T: Iterator<Item=u8>>(code: u8, size: Size, in
Ok(spec)
}
-fn Operand_RegDerefDisp20Abs<T: Iterator<Item=u8>>(code: u8, inst: &mut Instruction, bytes: &mut T) -> Result<OperandSpec, DecodeError> {
+fn Operand_RegDerefDisp20Abs<T: Reader<<M16C as Arch>::Address, <M16C as Arch>::Word>>(code: u8, inst: &mut Instruction, words: &mut T) -> Result<OperandSpec, <M16C as Arch>::DecodeError> {
use OperandSpec::*;
let (imm_size, spec) = match code {
0b0000 => (0, R2R0),
0b0001 => (0, R3R1),
- 0b0010 => { return Err(DecodeError::InvalidOperand); },
- 0b0011 => { return Err(DecodeError::InvalidOperand); },
+ 0b0010 => { return Err(StandardDecodeError::InvalidOperand); },
+ 0b0011 => { return Err(StandardDecodeError::InvalidOperand); },
0b0100 => (0, A1A0),
- 0b0101 => { return Err(DecodeError::InvalidOperand); },
+ 0b0101 => { return Err(StandardDecodeError::InvalidOperand); },
0b0110 => (0, Deref_A0),
0b0111 => (0, Deref_A1),
0b1000 => (1, Disp8_A0),
@@ -2130,18 +2101,18 @@ fn Operand_RegDerefDisp20Abs<T: Iterator<Item=u8>>(code: u8, inst: &mut Instruct
match imm_size {
0 => {}
1 => {
- inst.dispabs = bytes.next().ok_or(DecodeError::ExhaustedInput)? as u16;
+ inst.dispabs = words.next()? as u16;
inst.length += 1;
}
2 => {
- inst.dispabs = bytes.next().ok_or(DecodeError::ExhaustedInput)? as u16;
- inst.dispabs |= (bytes.next().ok_or(DecodeError::ExhaustedInput)? as u16) << 8;
+ inst.dispabs = words.next()? as u16;
+ inst.dispabs |= (words.next()? as u16) << 8;
inst.length += 2;
}
3 => {
- inst.imm_wide = bytes.next().ok_or(DecodeError::ExhaustedInput)? as u32;
- inst.imm_wide |= (bytes.next().ok_or(DecodeError::ExhaustedInput)? as u32) << 8;
- inst.imm_wide |= ((bytes.next().ok_or(DecodeError::ExhaustedInput)? & 0x0f) as u32) << 16;
+ inst.imm_wide = words.next()? as u32;
+ inst.imm_wide |= (words.next()? as u32) << 8;
+ inst.imm_wide |= ((words.next()? & 0x0f) as u32) << 16;
inst.length += 3;
}
_ => {
@@ -2152,7 +2123,7 @@ fn Operand_RegDerefDisp20Abs<T: Iterator<Item=u8>>(code: u8, inst: &mut Instruct
Ok(spec)
}
-fn Operand_IntFlgSpSbFb(code: u8) -> Result<OperandSpec, DecodeError> {
+fn Operand_IntFlgSpSbFb(code: u8) -> Result<OperandSpec, <M16C as Arch>::DecodeError> {
use OperandSpec::*;
match code {
@@ -2163,6 +2134,6 @@ fn Operand_IntFlgSpSbFb(code: u8) -> Result<OperandSpec, DecodeError> {
0b101 => Ok(SP),
0b110 => Ok(SB),
0b111 => Ok(FB),
- _ => Err(DecodeError::InvalidOperand)
+ _ => Err(StandardDecodeError::InvalidOperand)
}
}
generated by cgit v1.1 at 2024-11-24 20:44:44 +0000