bbc0a328c7
Accessing Wasm reference globals that are reference types will want to use the plain load/store instructions. This commit adds encodings for these instructions to match loading a i32/i64. Producers of IR are required to insert the appropriate barriers around the loads/stores.
89 lines
3.0 KiB
Rust
89 lines
3.0 KiB
Rust
use std::collections::{hash_map, HashMap, HashSet};
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use std::iter::FromIterator;
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use crate::cdsl::encodings::Encoding;
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use crate::cdsl::types::{LaneType, ValueType};
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use crate::cdsl::xform::{TransformGroup, TransformGroupIndex};
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pub(crate) struct CpuMode {
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pub name: &'static str,
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default_legalize: Option<TransformGroupIndex>,
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monomorphic_legalize: Option<TransformGroupIndex>,
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typed_legalize: HashMap<ValueType, TransformGroupIndex>,
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pub encodings: Vec<Encoding>,
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}
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impl CpuMode {
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pub fn new(name: &'static str) -> Self {
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Self {
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name,
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default_legalize: None,
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monomorphic_legalize: None,
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typed_legalize: HashMap::new(),
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encodings: Vec::new(),
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}
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}
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pub fn set_encodings(&mut self, encodings: Vec<Encoding>) {
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assert!(self.encodings.is_empty(), "clobbering encodings");
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self.encodings = encodings;
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}
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pub fn legalize_monomorphic(&mut self, group: &TransformGroup) {
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assert!(self.monomorphic_legalize.is_none());
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self.monomorphic_legalize = Some(group.id);
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}
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pub fn legalize_default(&mut self, group: &TransformGroup) {
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assert!(self.default_legalize.is_none());
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self.default_legalize = Some(group.id);
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}
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pub fn legalize_value_type(&mut self, lane_type: impl Into<ValueType>, group: &TransformGroup) {
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assert!(self
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.typed_legalize
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.insert(lane_type.into(), group.id)
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.is_none());
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}
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pub fn legalize_type(&mut self, lane_type: impl Into<LaneType>, group: &TransformGroup) {
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assert!(self
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.typed_legalize
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.insert(lane_type.into().into(), group.id)
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.is_none());
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}
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pub fn get_default_legalize_code(&self) -> TransformGroupIndex {
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self.default_legalize
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.expect("a finished CpuMode must have a default legalize code")
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}
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pub fn get_legalize_code_for(&self, typ: &Option<ValueType>) -> TransformGroupIndex {
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match typ {
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Some(typ) => self
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.typed_legalize
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.get(typ)
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.copied()
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.unwrap_or_else(|| self.get_default_legalize_code()),
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None => self
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.monomorphic_legalize
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.unwrap_or_else(|| self.get_default_legalize_code()),
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}
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}
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pub fn get_legalized_types(&self) -> hash_map::Keys<ValueType, TransformGroupIndex> {
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self.typed_legalize.keys()
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}
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/// Returns a deterministically ordered, deduplicated list of TransformGroupIndex for the directly
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/// reachable set of TransformGroup this TargetIsa uses.
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pub fn direct_transform_groups(&self) -> Vec<TransformGroupIndex> {
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let mut set = HashSet::new();
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if let Some(i) = &self.default_legalize {
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set.insert(*i);
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}
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if let Some(i) = &self.monomorphic_legalize {
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set.insert(*i);
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}
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set.extend(self.typed_legalize.values().cloned());
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let mut ret = Vec::from_iter(set);
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ret.sort();
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ret
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}
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}
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