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//! # SXTB16
//!
//! Signed Extend Byte 16 extracts two 8-bit values from a register, sign-extends them to 16 bits each, and writes the results to the destination register. The instruction can specify a rotation by 0, 8, 16, or 24 bits before extracting the 8-bit values.
#![allow(non_snake_case)]
#![allow(unused)]
use crate::error::Result;
use crate::utils::*;
use super::super::formatter::*;
use super::super::instruction::*;
use super::super::operand::*;
use super::super::consts::*;
use super::super::config::*;
use super::super::decoder::*;
// ---------------------------------------------------------------------------
// Iclass IclassSxtb16A1
// ---------------------------------------------------------------------------
/// Type that represents the IclassSxtb16A1 instruction class.
pub(crate) struct IclassSxtb16A1;
impl IclassSxtb16A1 {
/// Tries to decode the instruction in `data`.
pub(crate) fn decode(data: u32, decoder: &mut Decoder) -> Result<Instruction> {
let field_9 = (data >> 8) & 3;
let field_9_post = field_9;
let op = (data >> 20) & 3;
let op_post = op;
let field_7 = (data >> 5) & 7;
let field_7_post = field_7;
let Rm = (data >> 0) & 15;
let Rm_post = Rm;
let field_27 = (data >> 25) & 7;
let field_27_post = field_27;
let rotate = (data >> 10) & 3;
let rotate_post = rotate;
let U = (data >> 22) & 1;
let U_post = U;
let Rd = (data >> 12) & 15;
let Rd_post = Rd;
let Rn = (data >> 16) & 15;
let Rn_post = Rn;
let field_4 = (data >> 4) & 1;
let field_4_post = field_4;
let field_24 = (data >> 23) & 3;
let field_24_post = field_24;
let cond = (data >> 28) & 15;
let cond_post = cond;
return Sxtb16A1::decode(data as u32, decoder);
unreachable!()
}
}
/// SXTB16 A1 encoding.
///
/// # Encoding
///
/// <table style="font-family: courier, monospace">
/// <tr>
/// <td style="border: none">31</td>
/// <td style="border: none">30</td>
/// <td style="border: none">29</td>
/// <td style="border: none">28</td>
/// <td style="border: none">27</td>
/// <td style="border: none">26</td>
/// <td style="border: none">25</td>
/// <td style="border: none">24</td>
/// <td style="border: none">23</td>
/// <td style="border: none">22</td>
/// <td style="border: none">21</td>
/// <td style="border: none">20</td>
/// <td style="border: none">19</td>
/// <td style="border: none">18</td>
/// <td style="border: none">17</td>
/// <td style="border: none">16</td>
/// <td style="border: none">15</td>
/// <td style="border: none">14</td>
/// <td style="border: none">13</td>
/// <td style="border: none">12</td>
/// <td style="border: none">11</td>
/// <td style="border: none">10</td>
/// <td style="border: none">9</td>
/// <td style="border: none">8</td>
/// <td style="border: none">7</td>
/// <td style="border: none">6</td>
/// <td style="border: none">5</td>
/// <td style="border: none">4</td>
/// <td style="border: none">3</td>
/// <td style="border: none">2</td>
/// <td style="border: none">1</td>
/// <td style="border: none">0</td>
/// </tr>
/// <tr>
/// <td style="text-align: center; border-right: none" colspan="4">!= 1111</td>
/// <td style="text-align: center; border-right: none" colspan="1">0</td>
/// <td style="text-align: center; border-left: none; border-right: none" colspan="1">1</td>
/// <td style="text-align: center; border-left: none" colspan="1">1</td>
/// <td style="text-align: center; border-right: none" colspan="1">0</td>
/// <td style="text-align: center; border-left: none" colspan="1">1</td>
/// <td style="text-align: center; border-right: none" colspan="1">0</td>
/// <td style="text-align: center; border-right: none" colspan="1">0</td>
/// <td style="text-align: center; border-left: none" colspan="1">0</td>
/// <td style="text-align: center; border-right: none" colspan="1">1</td>
/// <td style="text-align: center; border-left: none; border-right: none" colspan="1">1</td>
/// <td style="text-align: center; border-left: none; border-right: none" colspan="1">1</td>
/// <td style="text-align: center; border-left: none" colspan="1">1</td>
/// <td style="text-align: center" colspan="4">Rd</td>
/// <td style="text-align: center" colspan="2">rotate</td>
/// <td style="text-align: center; border-right: none" colspan="3">(0)</td>
/// <td style="text-align: center; border-left: none" colspan="3">(0)</td>
/// <td style="text-align: center; border-right: none" colspan="1">0</td>
/// <td style="text-align: center; border-left: none; border-right: none" colspan="1">1</td>
/// <td style="text-align: center; border-left: none" colspan="1">1</td>
/// <td style="text-align: center; border-right: none" colspan="1">1</td>
/// <td style="text-align: center" colspan="4">Rm</td>
/// </tr>
/// <tr>
/// <td style="text-align: center; border: none" colspan="4">cond</td>
/// <td style="text-align: center; border: none" colspan="3"></td>
/// <td style="text-align: center; border: none" colspan="2"></td>
/// <td style="text-align: center; border: none" colspan="1">U</td>
/// <td style="text-align: center; border: none" colspan="2">op</td>
/// <td style="text-align: center; border: none" colspan="4">Rn</td>
/// <td style="text-align: center; border: none" colspan="4"></td>
/// <td style="text-align: center; border: none" colspan="2"></td>
/// <td style="text-align: center; border: none" colspan="2"></td>
/// <td style="text-align: center; border: none" colspan="3"></td>
/// <td style="text-align: center; border: none" colspan="1"></td>
/// <td style="text-align: center; border: none" colspan="4"></td>
/// </tr>
/// </table>
pub struct Sxtb16A1;
impl Sxtb16A1 {
/// Returns the instruction mnemonic.
pub fn mnemonic(_instr: &Instruction) -> Mnemonic {
Mnemonic::SXTB16
}
/// Returns the instruction condition information.
pub fn condition(_instr: &Instruction) -> ConditionalInstruction {
ConditionalInstruction::Condition(0, false, false)
}
/// Returns the instruction size.
pub fn size(instr: &Instruction) -> usize {
4
}
/// Decodes the instruction in `data`.
pub fn decode(data: u32, decoder: &mut Decoder) -> Result<Instruction> {
// Fields are extracted from the input value.
let cond = (data >> 28) & 15;
let cond_post = cond;
let Rd = (data >> 12) & 15;
let Rd_post = Rd;
let rotate = (data >> 10) & 3;
let rotate_post = rotate;
let Rm = (data >> 0) & 15;
let Rm_post = Rm;
// Operand values are computed from the base fields.
let cond_post = cond;
let op_0 = MnemonicCondition::decode(cond_post)?;
let Rd_post = Rd;
let op_1 = Register::decode(Rd_post)?;
let Rm_post = Rm;
let op_2 = Register::decode(Rm_post)?;
let rotate_post = rotate;
let op_3 = match rotate_post {
0 => Operand::None,
1 => Operand::Shift(Shift::ROR(8)),
2 => Operand::Shift(Shift::ROR(16)),
3 => Operand::Shift(Shift::ROR(24)),
_ => todo!(),
};
// Instruction creation from the operands.
let mut instr = Instruction::builder(Code::SXTB16_A1)
.operand(0, op_0)?
.operand(1, op_1)?
.operand(2, op_2)?
.operand(3, op_3)?
.build();
Ok(instr)
}
/// Encodes the instruction into `buf`.
pub fn encode(instr: &Instruction, buf: &mut Vec<u8>) -> Result<usize> {
// Retrieve all operand values.
let cond_pre = instr.op0().as_mnemonic_condition()?.encode();
let Rd_pre = instr.op1().as_register()?.encode();
let Rm_pre = instr.op2().as_register()?.encode();
let rotate_pre = match instr.op3() {
Operand::None => 0,
Operand::Shift(Shift::ROR(8)) => 1,
Operand::Shift(Shift::ROR(16)) => 2,
Operand::Shift(Shift::ROR(24)) => 3,
_ => todo!(),
};
// Compute all instruction fields from the operand values.
let cond = (cond_pre & 15);
let Rd = (Rd_pre & 15);
let Rm = (Rm_pre & 15);
let rotate_pre = rotate_pre;
let rotate = (rotate_pre & 3);
// Add all fields to the base instruction encoding.
let mut instr: u32 = 0b00000110100011110000000001110000;
instr |= (cond & 15) << 28;
instr |= (Rd & 15) << 12;
instr |= (Rm & 15) << 0;
instr |= (rotate & 3) << 10;
let bytes = instr.to_le_bytes();
let len = bytes.len();
buf.extend(bytes);
Ok(len)
}
/// Encode an instruction part of an instruction block into `buf`.
pub fn encode_block(instr: &mut Instruction, buf: &mut Vec<u8>, labels: &std::collections::HashMap<u64, u64>) -> Result<usize> {
Self::encode(instr, buf)
}
/// Verifies that operand #0 is valid.
pub fn check_op0(instr: &Instruction, op: &Operand) -> Result<()> {
if let Operand::MnemonicCondition(r) = op {
return Ok(())
}
todo!()
}
/// Verifies that operand #1 is valid.
pub fn check_op1(instr: &Instruction, op: &Operand) -> Result<()> {
if let Operand::Register(r) = op {
return Ok(())
}
todo!()
}
/// Verifies that operand #2 is valid.
pub fn check_op2(instr: &Instruction, op: &Operand) -> Result<()> {
if let Operand::Register(r) = op {
return Ok(())
}
todo!()
}
/// Verifies that operand #3 is valid.
pub fn check_op3(instr: &Instruction, op: &Operand) -> Result<()> {
match op {
Operand::None => {},
Operand::Shift(Shift::ROR(8)) => {},
Operand::Shift(Shift::ROR(16)) => {},
Operand::Shift(Shift::ROR(24)) => {},
_ => todo!(),
}
Ok(())
}
/// Verifies that operand #4 is valid.
pub fn check_op4(instr: &Instruction, op: &Operand) -> Result<()> {
todo!()
}
/// Verifies that operand #5 is valid.
pub fn check_op5(instr: &Instruction, op: &Operand) -> Result<()> {
todo!()
}
/// Verifies that operand #6 is valid.
pub fn check_op6(instr: &Instruction, op: &Operand) -> Result<()> {
todo!()
}
/// Formats the instruction.
pub fn format(instr: &Instruction, fmt: &mut impl Formatter, output: &mut impl FormatterOutput, config: &Config) -> Result<()> {
fmt.format_mnemonic(output, &config.global, &config.instructions.sxtb16_a1, &instr)?;
fmt.format_operand(output, &config.global, &config.instructions.sxtb16_a1, &instr, 0)?;
fmt.format_qualifier(output, &config.global, &config.instructions.sxtb16_a1, &instr, FormatterQualifier::Wide, false, false)?;
fmt.format_punctuation(output, &config.global, &config.instructions.sxtb16_a1, &instr, FormatterTextKind::Space)?;
if !instr.op1().is_none() {
fmt.format_operand(output, &config.global, &config.instructions.sxtb16_a1, &instr, 1)?;
fmt.format_punctuation(output, &config.global, &config.instructions.sxtb16_a1, &instr, FormatterTextKind::Comma)?;
};
fmt.format_operand(output, &config.global, &config.instructions.sxtb16_a1, &instr, 2)?;
if !instr.op3().is_none() {
fmt.format_punctuation(output, &config.global, &config.instructions.sxtb16_a1, &instr, FormatterTextKind::Comma)?;
fmt.format_operand(output, &config.global, &config.instructions.sxtb16_a1, &instr, 3)?;
};
Ok(())
}
}
/// Type that represents alias identifiers for [`Sxtb16A1`].
#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Debug, Hash)]
pub enum Sxtb16A1Aliases {
None,
}
/// Type that represents encoding identifiers for [`Sxtb16A1`].
#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Debug, Hash)]
pub enum Sxtb16A1Encodings {
None
}