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//! # MLS
//!
//! Multiply and Subtract multiplies two register values, and subtracts the product from a third register value. The least significant 32 bits of the result are written to the destination register. These 32 bits do not depend on whether the source register values are considered to be signed values or unsigned 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 IclassMlsA1
// ---------------------------------------------------------------------------
/// Type that represents the IclassMlsA1 instruction class.
pub(crate) struct IclassMlsA1;
impl IclassMlsA1 {
/// Tries to decode the instruction in `data`.
pub(crate) fn decode(data: u32, decoder: &mut Decoder) -> Result<Instruction> {
let opc = (data >> 21) & 7;
let opc_post = opc;
let S = (data >> 20) & 1;
let S_post = S;
let Rm = (data >> 8) & 15;
let Rm_post = Rm;
let Ra = (data >> 12) & 15;
let Ra_post = Ra;
let field_25 = (data >> 25) & 1;
let field_25_post = field_25;
let Rd = (data >> 16) & 15;
let Rd_post = Rd;
let field_27 = (data >> 26) & 3;
let field_27_post = field_27;
let cond = (data >> 28) & 15;
let cond_post = cond;
let field_6 = (data >> 5) & 3;
let field_6_post = field_6;
let field_4 = (data >> 4) & 1;
let field_4_post = field_4;
let Rn = (data >> 0) & 15;
let Rn_post = Rn;
let field_7 = (data >> 7) & 1;
let field_7_post = field_7;
let field_24 = (data >> 24) & 1;
let field_24_post = field_24;
return MlsA1::decode(data as u32, decoder);
unreachable!()
}
}
/// MLS 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" colspan="1">0</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-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" colspan="4">Rd</td>
/// <td style="text-align: center" colspan="4">Ra</td>
/// <td style="text-align: center" colspan="4">Rm</td>
/// <td style="text-align: center; border-right: 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">0</td>
/// <td style="text-align: center; border-right: none" colspan="1">1</td>
/// <td style="text-align: center" colspan="4">Rn</td>
/// </tr>
/// <tr>
/// <td style="text-align: center; border: none" colspan="4">cond</td>
/// <td style="text-align: center; border: none" colspan="2"></td>
/// <td style="text-align: center; border: none" colspan="1"></td>
/// <td style="text-align: center; border: none" colspan="1"></td>
/// <td style="text-align: center; border: none" colspan="3">opc</td>
/// <td style="text-align: center; border: none" colspan="1">S</td>
/// <td style="text-align: center; border: none" colspan="4"></td>
/// <td style="text-align: center; border: none" colspan="4"></td>
/// <td style="text-align: center; border: none" colspan="4"></td>
/// <td style="text-align: center; border: none" colspan="1"></td>
/// <td style="text-align: center; border: none" colspan="2"></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 MlsA1;
impl MlsA1 {
/// Returns the instruction mnemonic.
pub fn mnemonic(_instr: &Instruction) -> Mnemonic {
Mnemonic::MLS
}
/// 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 >> 16) & 15;
let Rd_post = Rd;
let Ra = (data >> 12) & 15;
let Ra_post = Ra;
let Rm = (data >> 8) & 15;
let Rm_post = Rm;
let Rn = (data >> 0) & 15;
let Rn_post = Rn;
// 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 Rn_post = Rn;
let op_2 = Register::decode(Rn_post)?;
let Rm_post = Rm;
let op_3 = Register::decode(Rm_post)?;
let Ra_post = Ra;
let op_4 = Register::decode(Ra_post)?;
// Instruction creation from the operands.
let mut instr = Instruction::builder(Code::MLS_A1)
.operand(0, op_0)?
.operand(1, op_1)?
.operand(2, op_2)?
.operand(3, op_3)?
.operand(4, op_4)?
.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 Rn_pre = instr.op2().as_register()?.encode();
let Rm_pre = instr.op3().as_register()?.encode();
let Ra_pre = instr.op4().as_register()?.encode();
// Compute all instruction fields from the operand values.
let cond = (cond_pre & 15);
let Rd = (Rd_pre & 15);
let Rn = (Rn_pre & 15);
let Rm = (Rm_pre & 15);
let Ra = (Ra_pre & 15);
// Add all fields to the base instruction encoding.
let mut instr: u32 = 0b00000000011000000000000010010000;
instr |= (cond & 15) << 28;
instr |= (Rd & 15) << 16;
instr |= (Rn & 15) << 0;
instr |= (Rm & 15) << 8;
instr |= (Ra & 15) << 12;
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<()> {
if let Operand::Register(r) = op {
return Ok(())
}
todo!()
}
/// Verifies that operand #4 is valid.
pub fn check_op4(instr: &Instruction, op: &Operand) -> Result<()> {
if let Operand::Register(r) = op {
return Ok(())
}
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.mls_a1, &instr)?;
fmt.format_operand(output, &config.global, &config.instructions.mls_a1, &instr, 0)?;
fmt.format_qualifier(output, &config.global, &config.instructions.mls_a1, &instr, FormatterQualifier::Wide, false, false)?;
fmt.format_punctuation(output, &config.global, &config.instructions.mls_a1, &instr, FormatterTextKind::Space)?;
fmt.format_operand(output, &config.global, &config.instructions.mls_a1, &instr, 1)?;
fmt.format_punctuation(output, &config.global, &config.instructions.mls_a1, &instr, FormatterTextKind::Comma)?;
fmt.format_operand(output, &config.global, &config.instructions.mls_a1, &instr, 2)?;
fmt.format_punctuation(output, &config.global, &config.instructions.mls_a1, &instr, FormatterTextKind::Comma)?;
fmt.format_operand(output, &config.global, &config.instructions.mls_a1, &instr, 3)?;
fmt.format_punctuation(output, &config.global, &config.instructions.mls_a1, &instr, FormatterTextKind::Comma)?;
fmt.format_operand(output, &config.global, &config.instructions.mls_a1, &instr, 4)?;
Ok(())
}
}
/// Type that represents alias identifiers for [`MlsA1`].
#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Debug, Hash)]
pub enum MlsA1Aliases {
None,
}
/// Type that represents encoding identifiers for [`MlsA1`].
#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Debug, Hash)]
pub enum MlsA1Encodings {
None
}