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-rw-r--r--src/lib.rs92
1 files changed, 48 insertions, 44 deletions
diff --git a/src/lib.rs b/src/lib.rs
index 2c0a001..cc70c16 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -8,7 +8,7 @@ extern crate serde;
extern crate yaxpeax_arch;
extern crate termion;
-use yaxpeax_arch::{Arch, ColorSettings, Colorize, Decodable, LengthedInstruction, ShowContextual};
+use yaxpeax_arch::{Arch, ColorSettings, Colorize, Decoder, LengthedInstruction, ShowContextual};
use std::fmt::{Display, Formatter};
@@ -31,6 +31,7 @@ pub struct PIC17;
impl Arch for PIC17 {
type Address = u16;
type Instruction = Instruction;
+ type Decoder = InstDecoder;
type Operand = Operand;
}
@@ -278,15 +279,18 @@ impl Display for Operand {
}
}
-impl Decodable for Instruction {
- fn decode<T: IntoIterator<Item=u8>>(bytes: T) -> Option<Self> {
+#[derive(Default, Debug)]
+pub struct InstDecoder {}
+
+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<()> {
let mut bytes_iter = bytes.into_iter();
let word: Vec<u8> = bytes_iter.by_ref().take(2).collect();
if word.len() != 2 {
@@ -295,43 +299,43 @@ impl Decodable for Instruction {
match word[1] {
0x00 => {
- self.operands = [Operand::Nothing, Operand::Nothing];
+ inst.operands = [Operand::Nothing, Operand::Nothing];
match word[0] {
0x00 => {
- self.opcode = Opcode::NOP;
+ inst.opcode = Opcode::NOP;
Some(())
},
0b00000010 => {
- self.opcode = Opcode::RETURN;
+ inst.opcode = Opcode::RETURN;
Some(())
},
0b00000011 => {
- self.opcode = Opcode::SLEEP;
+ inst.opcode = Opcode::SLEEP;
Some(())
},
0b00000100 => {
- self.opcode = Opcode::CLRWDT;
+ inst.opcode = Opcode::CLRWDT;
Some(())
},
0b00000101 => {
- self.opcode = Opcode::RETFIE;
+ inst.opcode = Opcode::RETFIE;
Some(())
},
_ => {
- self.opcode = Opcode::Invalid(word[1], word[0]);
+ inst.opcode = Opcode::Invalid(word[1], word[0]);
None
}
}
},
0x01 => {
- self.opcode = Opcode::MOVWF;
- self.operands = [Operand::File(word[0]), Operand::Nothing];
+ inst.opcode = Opcode::MOVWF;
+ inst.operands = [Operand::File(word[0]), Operand::Nothing];
Some(())
},
x if x < 0x30 => {
// TODO: consume
let d = x & 0x01 == 0x01;
- self.opcode = [
+ inst.opcode = [
Opcode::SUBWFB,
Opcode::SUBWF,
Opcode::DECF,
@@ -356,8 +360,8 @@ impl Decodable for Instruction {
Opcode::NEGW,
Opcode::DAW
][(x >> 1) as usize - 1];
- self.operands[0] = Operand::File(word[0]);
- self.operands[1] = if d {
+ inst.operands[0] = Operand::File(word[0]);
+ inst.operands[1] = if d {
Operand::File(word[0])
} else {
Operand::W
@@ -365,8 +369,8 @@ impl Decodable for Instruction {
Some(())
},
x if x < 0x40 => {
- self.operands = [Operand::File(word[0]), Operand::Nothing];
- self.opcode = match word[1] {
+ inst.operands = [Operand::File(word[0]), Operand::Nothing];
+ inst.opcode = match word[1] {
0x30 => Opcode::CPFSLT,
0x31 => Opcode::CPFSEQ,
0x32 => Opcode::CPFSGT,
@@ -375,43 +379,43 @@ impl Decodable for Instruction {
0x35 => { Opcode::Invalid(word[1], word[0]); return None },
0x36 => { Opcode::Invalid(word[1], word[0]); return None },
0x37 => { Opcode::Invalid(word[1], word[0]); return None },
- 0x38 => { self.operands[1] = Operand::ImmediateU8(0); Opcode::BTG },
- 0x39 => { self.operands[1] = Operand::ImmediateU8(1); Opcode::BTG },
- 0x3a => { self.operands[1] = Operand::ImmediateU8(2); Opcode::BTG },
- 0x3b => { self.operands[1] = Operand::ImmediateU8(3); Opcode::BTG },
- 0x3c => { self.operands[1] = Operand::ImmediateU8(4); Opcode::BTG },
- 0x3d => { self.operands[1] = Operand::ImmediateU8(5); Opcode::BTG },
- 0x3e => { self.operands[1] = Operand::ImmediateU8(6); Opcode::BTG },
- 0x3f => { self.operands[1] = Operand::ImmediateU8(7); Opcode::BTG },
+ 0x38 => { inst.operands[1] = Operand::ImmediateU8(0); Opcode::BTG },
+ 0x39 => { inst.operands[1] = Operand::ImmediateU8(1); Opcode::BTG },
+ 0x3a => { inst.operands[1] = Operand::ImmediateU8(2); Opcode::BTG },
+ 0x3b => { inst.operands[1] = Operand::ImmediateU8(3); Opcode::BTG },
+ 0x3c => { inst.operands[1] = Operand::ImmediateU8(4); Opcode::BTG },
+ 0x3d => { inst.operands[1] = Operand::ImmediateU8(5); Opcode::BTG },
+ 0x3e => { inst.operands[1] = Operand::ImmediateU8(6); Opcode::BTG },
+ 0x3f => { inst.operands[1] = Operand::ImmediateU8(7); Opcode::BTG },
_ => { unreachable!(); }
};
Some(())
},
x if x < 0x60 => {
- self.opcode = Opcode::MOVPF;
- self.operands[0] = Operand::File((word[1]) & 0x1f);
- self.operands[1] = Operand::File(word[0]);
+ inst.opcode = Opcode::MOVPF;
+ inst.operands[0] = Operand::File((word[1]) & 0x1f);
+ inst.operands[1] = Operand::File(word[0]);
Some(())
},
x if x < 0x80 => {
- self.opcode = Opcode::MOVFP;
- self.operands[0] = Operand::File(word[0]);
- self.operands[1] = Operand::File((word[1]) & 0x1f);
+ inst.opcode = Opcode::MOVFP;
+ inst.operands[0] = Operand::File(word[0]);
+ inst.operands[1] = Operand::File((word[1]) & 0x1f);
Some(())
},
x if x < 0xa0 => {
- self.opcode = [
+ inst.opcode = [
Opcode::BSF,
Opcode::BCF,
Opcode::BTFSS,
Opcode::BTFSC,
][(((word[1]) >> 3) & 0x3) as usize];
- self.operands[0] = Operand::File(word[0]);
- self.operands[1] = Operand::ImmediateU8((word[1]) & 0x7);
+ inst.operands[0] = Operand::File(word[0]);
+ inst.operands[1] = Operand::ImmediateU8((word[1]) & 0x7);
Some(())
},
x if x < 0xb0 => {
- self.opcode = [
+ inst.opcode = [
Opcode::TLRDL,
Opcode::TLRDL,
Opcode::TLRDH,
@@ -429,11 +433,11 @@ impl Decodable for Instruction {
Opcode::TABLWTH,
Opcode::TABLWTHI
][(x & 0x0f) as usize];
- self.operands = [Operand::File(word[0]), Operand::Nothing];
+ inst.operands = [Operand::File(word[0]), Operand::Nothing];
Some(())
},
x if x < 0xc0 => {
- self.opcode = [
+ inst.opcode = [
Opcode::MOVLW,
Opcode::ADDLW,
Opcode::SUBLW,
@@ -451,17 +455,17 @@ impl Decodable for Instruction {
Opcode::Invalid(word[1], word[0]),
Opcode::Invalid(word[1], word[0])
][((word[1]) & 0x0f) as usize];
- self.operands = [Operand::ImmediateU8(word[0]), Operand::Nothing];
+ inst.operands = [Operand::ImmediateU8(word[0]), Operand::Nothing];
Some(())
},
x if x < 0xe0 => {
- self.opcode = Opcode::GOTO;
- self.operands = [Operand::ImmediateU32(word[0] as u32 | (((word[1] as u32) & 0x1f) << 8)), Operand::Nothing];
+ inst.opcode = Opcode::GOTO;
+ inst.operands = [Operand::ImmediateU32(word[0] as u32 | (((word[1] as u32) & 0x1f) << 8)), Operand::Nothing];
Some(())
},
_ => {
- self.opcode = Opcode::CALL;
- self.operands = [Operand::ImmediateU32(word[0] as u32 | (((word[1] as u32) & 0x1f) << 8)), Operand::Nothing];
+ inst.opcode = Opcode::CALL;
+ inst.operands = [Operand::ImmediateU32(word[0] as u32 | (((word[1] as u32) & 0x1f) << 8)), Operand::Nothing];
Some(())
}
}
generated by cgit v1.1 at 2025-11-04 04:37:43 +0000