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-rw-r--r--src/lib.rs71
1 files changed, 37 insertions, 34 deletions
diff --git a/src/lib.rs b/src/lib.rs
index e2391a0..f9137fa 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -20,6 +20,9 @@ pub struct Instruction {
impl LengthedInstruction for Instruction {
type Unit = <PIC18 as Arch>::Address;
+ fn min_size() -> Self::Unit {
+ 2
+ }
fn len(&self) -> Self::Unit {
match self.opcode {
Opcode::MOVFF
@@ -142,24 +145,24 @@ pub enum Operand {
}
impl Decodable for Instruction {
- fn decode<'a, T: IntoIterator<Item=&'a u8>>(bytes: T) -> Option<Self> {
+ fn decode<T: IntoIterator<Item=u8>>(bytes: T) -> Option<Self> {
let mut blank = Instruction::blank();
match blank.decode_into(bytes) {
Some(_) => Some(blank),
None => None
}
}
- fn decode_into<'a, T: IntoIterator<Item=&'a u8>>(&mut self, bytes: T) -> Option<()> {
+ fn decode_into<T: IntoIterator<Item=u8>>(&mut self, bytes: T) -> Option<()> {
let mut bytes_iter = bytes.into_iter();
- let word: Vec<&'a u8> = bytes_iter.by_ref().take(2).collect();
+ let word: Vec<u8> = bytes_iter.by_ref().take(2).collect();
if word.len() != 2 {
return None;
}
// println!("Decoding {:x?}", word);
- match *word[1] {
+ match word[1] {
0x00 => {
- match *word[0] {
+ match word[0] {
0x00 => {
self.opcode = Opcode::NOP;
Some(())
@@ -241,7 +244,7 @@ impl Decodable for Instruction {
Some(())
},
_ => {
- self.opcode = Opcode::Invalid(*word[0], *word[1]);
+ self.opcode = Opcode::Invalid(word[0], word[1]);
None
}
}
@@ -249,60 +252,60 @@ impl Decodable for Instruction {
0x01 => {
self.opcode = Opcode::MOVLB;
// this ignores high nibble of low word. ok by isa, but...
- self.operands[0] = Operand::ImmediateU8(*word[0] & 0x0f);
+ self.operands[0] = Operand::ImmediateU8(word[0] & 0x0f);
Some(())
},
0x02 | 0x03 => {
self.opcode = Opcode::MULWF;
let a = (word[1] & 0x01) == 1;
- self.operands[0] = Operand::File(*word[0], a);
+ self.operands[0] = Operand::File(word[0], a);
Some(())
},
0x04 | 0x05 | 0x06 | 0x07 => {
self.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);
+ self.operands[0] = Operand::RedirectableFile(word[0], a, d);
Some(())
},
0x08 => {
self.opcode = Opcode::SUBLW;
- self.operands[0] = Operand::ImmediateU8(*word[0]);
+ self.operands[0] = Operand::ImmediateU8(word[0]);
Some(())
},
0x09 => {
self.opcode = Opcode::IORLW;
- self.operands[0] = Operand::ImmediateU8(*word[0]);
+ self.operands[0] = Operand::ImmediateU8(word[0]);
Some(())
},
0x0a => {
self.opcode = Opcode::XORLW;
- self.operands[0] = Operand::ImmediateU8(*word[0]);
+ self.operands[0] = Operand::ImmediateU8(word[0]);
Some(())
},
0x0b => {
self.opcode = Opcode::ANDLW;
- self.operands[0] = Operand::ImmediateU8(*word[0]);
+ self.operands[0] = Operand::ImmediateU8(word[0]);
Some(())
},
0x0c => {
self.opcode = Opcode::RETLW;
- self.operands[0] = Operand::ImmediateU8(*word[0]);
+ self.operands[0] = Operand::ImmediateU8(word[0]);
Some(())
},
0x0d => {
self.opcode = Opcode::MULLW;
- self.operands[0] = Operand::ImmediateU8(*word[0]);
+ self.operands[0] = Operand::ImmediateU8(word[0]);
Some(())
},
0x0e => {
self.opcode = Opcode::MOVLW;
- self.operands[0] = Operand::ImmediateU8(*word[0]);
+ self.operands[0] = Operand::ImmediateU8(word[0]);
Some(())
},
0x0f => {
self.opcode = Opcode::ADDLW;
- self.operands[0] = Operand::ImmediateU8(*word[0]);
+ self.operands[0] = Operand::ImmediateU8(word[0]);
Some(())
},
x if x >= 0x10 && x < 0b01100000 => {
@@ -330,7 +333,7 @@ impl Decodable for Instruction {
Opcode::SUBWFB,
Opcode::SUBWF
][opc as usize];
- self.operands[0] = Operand::RedirectableFile(*word[0], (da & 0x01) == 0x01, (da & 0x02) == 0x02);
+ self.operands[0] = Operand::RedirectableFile(word[0], (da & 0x01) == 0x01, (da & 0x02) == 0x02);
Some(())
},
x if x >= 0b01100000 && x < 0b01110000 => {
@@ -346,7 +349,7 @@ impl Decodable for Instruction {
Opcode::NEGF,
Opcode::MOVWF
][opc as usize];
- self.operands[0] = Operand::File(*word[0], a == 1);
+ self.operands[0] = Operand::File(word[0], a == 1);
Some(())
},
x if x >= 0b01110000 && x < 0b11000000 => {
@@ -360,13 +363,13 @@ 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[0] = Operand::File(word[0], a == 1);
self.operands[1] = Operand::ImmediateU8(bit);
Some(())
},
x if x >= 0b11000000 && x < 0b11010000 => {
self.opcode = Opcode::MOVFF;
- let word2: Vec<&'a u8> = bytes_iter.take(2).collect();
+ let word2: Vec<u8> = bytes_iter.take(2).collect();
if word2.len() != 2 {
return None;
}
@@ -374,8 +377,8 @@ impl Decodable for Instruction {
return None;
}
- let src = (*word[0] as u16) | ((*word[1] as u16 & 0x0f) << 8);
- let dest = (*word2[0] as u16) | ((*word2[1] as u16 & 0x0f) << 8);
+ 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);
Some(())
@@ -385,7 +388,7 @@ impl Decodable for Instruction {
Opcode::BRA,
Opcode::RCALL
][((x >> 3) & 1) as usize];
- self.operands[0] = Operand::ImmediateU32((((x & 0b111) as u32) << 8) | *word[0] as u32);
+ self.operands[0] = Operand::ImmediateU32((((x & 0b111) as u32) << 8) | word[0] as u32);
Some(())
},
x if x >= 0b11100000 && x < 0b11101000 => {
@@ -400,12 +403,12 @@ impl Decodable for Instruction {
Opcode::BN,
Opcode::BNN
][opc as usize];
- self.operands[0] = Operand::ImmediateU8(*word[0]);
+ self.operands[0] = Operand::ImmediateU8(word[0]);
Some(())
},
0xee => {
- let f_k_msb = *word[0];
- let word2: Vec<&'a u8> = bytes_iter.take(2).collect();
+ let f_k_msb = word[0];
+ let word2: Vec<u8> = bytes_iter.take(2).collect();
if word2.len() != 2 {
return None;
}
@@ -421,14 +424,14 @@ impl Decodable for Instruction {
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));
+ self.operands[1] = Operand::ImmediateU32(((k_msb as u32) << 8) | (k_lsb as u32));
Some(())
}
/* ... */
0xeb | 0xec => {
// TODO: respect s bit
- let k_lsb = *word[0];
- let word2: Vec<&'a u8> = bytes_iter.take(2).collect();
+ let k_lsb = word[0];
+ let word2: Vec<u8> = bytes_iter.take(2).collect();
if word2.len() != 2 {
return None;
}
@@ -437,15 +440,15 @@ impl Decodable for Instruction {
return None; // invalid instruction
}
- let k_msb = (((*word2[1] & 0xf) as u32) << 8) | *word2[0] as u32;
+ 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);
Some(())
}
0xef => {
- let k_lsb = *word[0];
- let word2: Vec<&'a u8> = bytes_iter.take(2).collect();
+ let k_lsb = word[0];
+ let word2: Vec<u8> = bytes_iter.take(2).collect();
if word2.len() != 2 {
return None;
}
@@ -454,7 +457,7 @@ impl Decodable for Instruction {
return None; // invalid instruction
}
- let k_msb = (((*word2[1] & 0xf) as u32) << 8) | *word2[0] as u32;
+ 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);
generated by cgit v1.1 at 2024-12-22 23:17:18 +0000