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-rw-r--r--src/lib.rs142
1 files changed, 73 insertions, 69 deletions
diff --git a/src/lib.rs b/src/lib.rs
index 93ad9af..3a611b5 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -7,7 +7,7 @@ extern crate serde;
extern crate yaxpeax_arch;
-use yaxpeax_arch::{Arch, Decodable, LengthedInstruction};
+use yaxpeax_arch::{Arch, Decoder, LengthedInstruction};
pub mod consts;
pub mod display;
@@ -23,6 +23,7 @@ pub struct PIC18;
impl Arch for PIC18 {
type Address = u32;
type Instruction = Instruction;
+ type Decoder = InstDecoder;
type Operand = Operand;
}
@@ -158,15 +159,18 @@ pub enum Operand {
Nothing
}
-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 {
@@ -178,154 +182,154 @@ impl Decodable for Instruction {
0x00 => {
match word[0] {
0x00 => {
- self.opcode = Opcode::NOP;
+ inst.opcode = Opcode::NOP;
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::PUSH;
+ inst.opcode = Opcode::PUSH;
Some(())
},
0b00000110 => {
- self.opcode = Opcode::POP;
+ inst.opcode = Opcode::POP;
Some(())
},
0b00000111 => {
- self.opcode = Opcode::DAW;
+ inst.opcode = Opcode::DAW;
Some(())
},
0b00001000 => {
- self.opcode = Opcode::TBLRD_S;
+ inst.opcode = Opcode::TBLRD_S;
Some(())
},
0b00001001 => {
- self.opcode = Opcode::TBLRD_S_I;
+ inst.opcode = Opcode::TBLRD_S_I;
Some(())
},
0b00001010 => {
- self.opcode = Opcode::TBLRD_S_D;
+ inst.opcode = Opcode::TBLRD_S_D;
Some(())
},
0b00001011 => {
- self.opcode = Opcode::TBLRD_I_S;
+ inst.opcode = Opcode::TBLRD_I_S;
Some(())
},
0b00001100 => {
- self.opcode = Opcode::TBLWT_S;
+ inst.opcode = Opcode::TBLWT_S;
Some(())
},
0b00001101 => {
- self.opcode = Opcode::TBLWT_S_I;
+ inst.opcode = Opcode::TBLWT_S_I;
Some(())
},
0b00001110 => {
- self.opcode = Opcode::TBLWT_S_D;
+ inst.opcode = Opcode::TBLWT_S_D;
Some(())
},
0b00001111 => {
- self.opcode = Opcode::TBLWT_I_S;
+ inst.opcode = Opcode::TBLWT_I_S;
Some(())
},
0b00010000 => {
- self.opcode = Opcode::RETFIE;
+ inst.opcode = Opcode::RETFIE;
Some(())
},
0b00010001 => {
- self.opcode = Opcode::RETFIE_FAST;
+ inst.opcode = Opcode::RETFIE_FAST;
Some(())
},
0b00010010 => {
- self.opcode = Opcode::RETURN;
+ inst.opcode = Opcode::RETURN;
Some(())
},
0b00010011 => {
- self.opcode = Opcode::RETURN_FAST;
+ inst.opcode = Opcode::RETURN_FAST;
Some(())
},
0b00010100 => {
- self.opcode = Opcode::CALLW;
+ inst.opcode = Opcode::CALLW;
Some(())
},
0b11111111 => {
- self.opcode = Opcode::RESET;
+ inst.opcode = Opcode::RESET;
Some(())
},
_ => {
- self.opcode = Opcode::Invalid(word[0], word[1]);
+ inst.opcode = Opcode::Invalid(word[0], word[1]);
None
}
}
},
0x01 => {
- self.opcode = Opcode::MOVLB;
+ inst.opcode = Opcode::MOVLB;
// this ignores high nibble of low word. ok by isa, but...
- self.operands[0] = Operand::ImmediateU8(word[0] & 0x0f);
+ inst.operands[0] = Operand::ImmediateU8(word[0] & 0x0f);
Some(())
},
0x02 | 0x03 => {
- self.opcode = Opcode::MULWF;
+ inst.opcode = Opcode::MULWF;
let a = (word[1] & 0x01) == 1;
- self.operands[0] = Operand::File(word[0], a);
+ inst.operands[0] = Operand::File(word[0], a);
Some(())
},
0x04 | 0x05 | 0x06 | 0x07 => {
- self.opcode = Opcode::DECF;
+ inst.opcode = Opcode::DECF;
let d = ((word[1] >> 1) & 0x01u8) == 1u8;
let a = (word[1] & 0x01) == 1;
- self.operands[0] = Operand::RedirectableFile(word[0], a, d);
+ inst.operands[0] = Operand::RedirectableFile(word[0], a, d);
Some(())
},
0x08 => {
- self.opcode = Opcode::SUBLW;
- self.operands[0] = Operand::ImmediateU8(word[0]);
+ inst.opcode = Opcode::SUBLW;
+ inst.operands[0] = Operand::ImmediateU8(word[0]);
Some(())
},
0x09 => {
- self.opcode = Opcode::IORLW;
- self.operands[0] = Operand::ImmediateU8(word[0]);
+ inst.opcode = Opcode::IORLW;
+ inst.operands[0] = Operand::ImmediateU8(word[0]);
Some(())
},
0x0a => {
- self.opcode = Opcode::XORLW;
- self.operands[0] = Operand::ImmediateU8(word[0]);
+ inst.opcode = Opcode::XORLW;
+ inst.operands[0] = Operand::ImmediateU8(word[0]);
Some(())
},
0x0b => {
- self.opcode = Opcode::ANDLW;
- self.operands[0] = Operand::ImmediateU8(word[0]);
+ inst.opcode = Opcode::ANDLW;
+ inst.operands[0] = Operand::ImmediateU8(word[0]);
Some(())
},
0x0c => {
- self.opcode = Opcode::RETLW;
- self.operands[0] = Operand::ImmediateU8(word[0]);
+ inst.opcode = Opcode::RETLW;
+ inst.operands[0] = Operand::ImmediateU8(word[0]);
Some(())
},
0x0d => {
- self.opcode = Opcode::MULLW;
- self.operands[0] = Operand::ImmediateU8(word[0]);
+ inst.opcode = Opcode::MULLW;
+ inst.operands[0] = Operand::ImmediateU8(word[0]);
Some(())
},
0x0e => {
- self.opcode = Opcode::MOVLW;
- self.operands[0] = Operand::ImmediateU8(word[0]);
+ inst.opcode = Opcode::MOVLW;
+ inst.operands[0] = Operand::ImmediateU8(word[0]);
Some(())
},
0x0f => {
- self.opcode = Opcode::ADDLW;
- self.operands[0] = Operand::ImmediateU8(word[0]);
+ inst.opcode = Opcode::ADDLW;
+ inst.operands[0] = Operand::ImmediateU8(word[0]);
Some(())
},
x if x >= 0x10 && x < 0b01100000 => {
let da = x & 0b0011;
let opc = (x >> 2) - 4;
- self.opcode = [
+ inst.opcode = [
Opcode::IORWF,
Opcode::ANDWF,
Opcode::XORWF,
@@ -347,13 +351,13 @@ impl Decodable for Instruction {
Opcode::SUBWFB,
Opcode::SUBWF
][opc as usize];
- self.operands[0] = Operand::RedirectableFile(word[0], (da & 0x01) == 0x01, (da & 0x02) == 0x02);
+ inst.operands[0] = Operand::RedirectableFile(word[0], (da & 0x01) == 0x01, (da & 0x02) == 0x02);
Some(())
},
x if x >= 0b01100000 && x < 0b01110000 => {
let a = x & 1;
let opc = (x >> 1) & 0b0000111;
- self.opcode = [
+ inst.opcode = [
Opcode::CPFSLT,
Opcode::CPFSEQ,
Opcode::CPFSGT,
@@ -363,13 +367,13 @@ impl Decodable for Instruction {
Opcode::NEGF,
Opcode::MOVWF
][opc as usize];
- self.operands[0] = Operand::File(word[0], a == 1);
+ inst.operands[0] = Operand::File(word[0], a == 1);
Some(())
},
x if x >= 0b01110000 && x < 0b11000000 => {
let a = x & 1;
let opc = ((x >> 4) & 0b00001111) - 0b111;
- self.opcode = [
+ inst.opcode = [
Opcode::BTG,
Opcode::BSF,
Opcode::BCF,
@@ -377,12 +381,12 @@ impl Decodable for Instruction {
Opcode::BTFSC
][opc as usize];
let bit = (x >> 1) & 0b0000111;
- self.operands[0] = Operand::File(word[0], a == 1);
- self.operands[1] = Operand::ImmediateU8(bit);
+ inst.operands[0] = Operand::File(word[0], a == 1);
+ inst.operands[1] = Operand::ImmediateU8(bit);
Some(())
},
x if x >= 0b11000000 && x < 0b11010000 => {
- self.opcode = Opcode::MOVFF;
+ inst.opcode = Opcode::MOVFF;
let word2: Vec<u8> = bytes_iter.take(2).collect();
if word2.len() != 2 {
return None;
@@ -393,21 +397,21 @@ impl Decodable for Instruction {
let src = (word[0] as u16) | ((word[1] as u16 & 0x0f) << 8);
let dest = (word2[0] as u16) | ((word2[1] as u16 & 0x0f) << 8);
- self.operands[0] = Operand::AbsoluteFile(src);
- self.operands[1] = Operand::AbsoluteFile(dest);
+ inst.operands[0] = Operand::AbsoluteFile(src);
+ inst.operands[1] = Operand::AbsoluteFile(dest);
Some(())
},
x if x >= 0b11010000 && x < 0b11100000 => {
- self.opcode = [
+ inst.opcode = [
Opcode::BRA,
Opcode::RCALL
][((x >> 3) & 1) as usize];
- self.operands[0] = Operand::ImmediateU32((((x & 0b111) as u32) << 8) | word[0] as u32);
+ inst.operands[0] = Operand::ImmediateU32((((x & 0b111) as u32) << 8) | word[0] as u32);
Some(())
},
x if x >= 0b11100000 && x < 0b11101000 => {
let opc = x & 0b00000111;
- self.opcode = [
+ inst.opcode = [
Opcode::BZ,
Opcode::BNZ,
Opcode::BC,
@@ -417,7 +421,7 @@ impl Decodable for Instruction {
Opcode::BN,
Opcode::BNN
][opc as usize];
- self.operands[0] = Operand::ImmediateU8(word[0]);
+ inst.operands[0] = Operand::ImmediateU8(word[0]);
Some(())
},
0xee => {
@@ -431,14 +435,14 @@ impl Decodable for Instruction {
return None; // invalid instruction
}
- self.opcode = Opcode::LFSR;
+ inst.opcode = Opcode::LFSR;
let f = (f_k_msb >> 4) & 0b0011;
let k_msb = f_k_msb & 0b1111;
let k_lsb = word2[0];
- self.operands[0] = Operand::FileFSR(f);
- self.operands[1] = Operand::ImmediateU32(((k_msb as u32) << 8) | (k_lsb as u32));
+ inst.operands[0] = Operand::FileFSR(f);
+ inst.operands[1] = Operand::ImmediateU32(((k_msb as u32) << 8) | (k_lsb as u32));
Some(())
}
/* ... */
@@ -456,8 +460,8 @@ impl Decodable for Instruction {
let k_msb = (((word2[1] & 0xf) as u32) << 8) | word2[0] as u32;
- self.opcode = Opcode::CALL;
- self.operands[0] = Operand::ImmediateU32(((k_msb << 8) | k_lsb as u32) << 1);
+ inst.opcode = Opcode::CALL;
+ inst.operands[0] = Operand::ImmediateU32(((k_msb << 8) | k_lsb as u32) << 1);
Some(())
}
0xef => {
@@ -473,8 +477,8 @@ impl Decodable for Instruction {
let k_msb = (((word2[1] & 0xf) as u32) << 8) | word2[0] as u32;
- self.opcode = Opcode::GOTO;
- self.operands[0] = Operand::ImmediateU32(((k_msb << 8) | k_lsb as u32) << 1);
+ inst.opcode = Opcode::GOTO;
+ inst.operands[0] = Operand::ImmediateU32(((k_msb << 8) | k_lsb as u32) << 1);
Some(())
}
_ => None
generated by cgit v1.1 at 2024-12-22 07:51:11 +0000