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132 lines
3.2 KiB
132 lines
3.2 KiB
use std::convert::TryFrom;
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use std::fmt::{Debug, Display, Formatter};
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use std::fmt;
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pub use mask::Mask;
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pub use rd::Rd;
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pub use rd::RdObj;
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pub use reg::Register;
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pub use wr::Wr;
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use crate::asm::data::literal::{as_signed, Value};
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use super::error::AsmError;
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pub mod literal;
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pub mod reg;
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pub mod mask;
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mod rd;
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mod wr;
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/// Data source disposition
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#[derive(Debug, Clone, Copy, Eq, PartialEq)]
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pub enum DataDisp {
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/// Constant value
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Immediate(Value),
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/// Register
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Register(Register),
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/// Object pointer
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ObjectPtr(Register),
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/// Discard the written value
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Discard,
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}
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impl Display for DataDisp {
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fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
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match self {
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DataDisp::Immediate(v) => {
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write!(f, "{}", as_signed(*v))
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}
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DataDisp::Register(r) => {
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write!(f, "{}", r)
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}
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DataDisp::ObjectPtr(r) => {
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write!(f, "@{}", r)
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}
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DataDisp::Discard => {
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write!(f, "_")
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}
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}
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}
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}
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impl From<RdData> for DataDisp {
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fn from(s: RdData) -> Self {
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match s {
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RdData::Immediate(x) => DataDisp::Immediate(x),
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RdData::Register(x) => DataDisp::Register(x),
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RdData::ObjectPtr(x) => DataDisp::ObjectPtr(x),
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}
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}
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}
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impl From<WrData> for DataDisp {
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fn from(s: WrData) -> Self {
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match s {
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WrData::Register(x) => DataDisp::Register(x),
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WrData::ObjectPtr(x) => DataDisp::ObjectPtr(x),
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WrData::Discard => DataDisp::Discard,
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}
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}
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}
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/// Data source disposition
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#[derive(Debug, Clone, Copy, Eq, PartialEq)]
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pub enum RdData {
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/// Constant value
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Immediate(Value),
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/// Register
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Register(Register),
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/// Pointer into memory, stored in a numbered register
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ObjectPtr(Register),
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}
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impl TryFrom<DataDisp> for RdData {
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type Error = AsmError;
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fn try_from(value: DataDisp) -> Result<Self, Self::Error> {
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match value {
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DataDisp::Immediate(x) => Ok(RdData::Immediate(x)),
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DataDisp::Register(x) => Ok(RdData::Register(x)),
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DataDisp::ObjectPtr(x) => Ok(RdData::ObjectPtr(x)),
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DataDisp::Discard => Err(AsmError::DiscardAsValue),
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}
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}
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}
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/// Data destination disposition
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#[derive(Debug, Clone, Copy, Eq, PartialEq)]
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pub enum WrData {
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/// Register
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Register(Register),
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/// Pointer into memory, stored in a numbered register
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ObjectPtr(Register),
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/// Discard the written value
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Discard,
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}
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impl From<WrData> for RdData {
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fn from(s: WrData) -> Self {
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match s {
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WrData::Register(x) => RdData::Register(x),
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WrData::ObjectPtr(x) => RdData::ObjectPtr(x),
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WrData::Discard => RdData::Immediate(0),
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}
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}
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}
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impl TryFrom<DataDisp> for WrData {
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type Error = AsmError;
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fn try_from(value: DataDisp) -> Result<Self, Self::Error> {
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match value {
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DataDisp::Immediate(_x) => Err(AsmError::ValueAsOutput),
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DataDisp::Register(x) => Ok(WrData::Register(x)),
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DataDisp::ObjectPtr(x) => Ok(WrData::ObjectPtr(x)),
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DataDisp::Discard => Ok(WrData::Discard),
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}
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}
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}
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