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//! Macro-table lookup builders: name-key scan, hashed name scan, and the
//! source-span hash the hashed scan is keyed on.
use vyre_foundation::ir::{Expr, Node};
use vyre_primitives::hash::fnv1a::{fnv1a32_initial_expr, fnv1a32_update_byte_node};
use super::*;
pub(super) fn emit_macro_lookup(
prefix: &str,
token: Expr,
macro_keys: &str,
macro_vals: &str,
output_var: &str,
) -> Vec<Node> {
let token_name = format!("{prefix}_tok");
let probe_slot = format!("{prefix}_probe_slot");
let probed_key = format!("{prefix}_probed_key");
let probe = format!("{prefix}_probe");
let lookup_done = format!("{prefix}_lookup_done");
let lookup_seen_empty = format!("{prefix}_lookup_seen_empty");
vec![
Node::let_bind(&token_name, token),
Node::let_bind(
&probe_slot,
Expr::bitand(
Expr::mul(Expr::var(&token_name), Expr::u32(2_654_435_769)),
Expr::u32(MACRO_TABLE_MASK),
),
),
Node::let_bind(output_var, Expr::u32(EMPTY_MACRO_SLOT)),
Node::let_bind(&lookup_done, Expr::u32(0)),
Node::let_bind(&lookup_seen_empty, Expr::u32(0)),
Node::loop_for(
probe,
Expr::u32(0),
Expr::u32(MACRO_TABLE_SLOTS),
vec![Node::if_then(
Expr::eq(Expr::var(&lookup_done), Expr::u32(0)),
vec![
Node::let_bind(&probed_key, Expr::load(macro_keys, Expr::var(&probe_slot))),
Node::if_then(
Expr::eq(Expr::var(&probed_key), Expr::var(&token_name)),
vec![
Node::assign(
output_var,
Expr::load(macro_vals, Expr::var(&probe_slot)),
),
Node::assign(&lookup_done, Expr::u32(1)),
],
),
Node::if_then(
Expr::eq(Expr::var(&probed_key), Expr::u32(EMPTY_MACRO_SLOT)),
vec![
Node::assign(&lookup_seen_empty, Expr::u32(1)),
Node::assign(&lookup_done, Expr::u32(1)),
],
),
Node::assign(
&probe_slot,
Expr::bitand(
Expr::add(Expr::var(&probe_slot), Expr::u32(1)),
Expr::u32(MACRO_TABLE_MASK),
),
),
],
)],
),
Node::if_then(
Expr::and(
Expr::eq(Expr::var(output_var), Expr::u32(EMPTY_MACRO_SLOT)),
Expr::eq(Expr::var(&lookup_seen_empty), Expr::u32(0)),
),
vec![Node::trap(
Expr::var(&token_name),
"macro-lookup-table-full-without-empty-slot",
)],
),
]
}
pub(super) fn emit_macro_hash_lookup(
prefix: &str,
name_hash: Expr,
source_start: Expr,
source_len: Expr,
source_words: &str,
source_layout: MacroByteLayout,
macro_name_hashes: &str,
macro_name_starts: &str,
macro_name_lens: &str,
macro_name_words: &str,
macro_name_layout: MacroByteLayout,
output_var: &str,
) -> Vec<Node> {
let hash_name = format!("{prefix}_name_hash");
let probe_slot = format!("{prefix}_probe_slot");
let probed_key = format!("{prefix}_probed_key");
let probe = format!("{prefix}_probe");
let lookup_done = format!("{prefix}_lookup_done");
let lookup_seen_empty = format!("{prefix}_lookup_seen_empty");
let candidate_name_start = format!("{prefix}_candidate_name_start");
let candidate_name_len = format!("{prefix}_candidate_name_len");
let candidate_name_end = format!("{prefix}_candidate_name_end");
let candidate_name_matches = format!("{prefix}_candidate_name_matches");
let candidate_byte_i = format!("{prefix}_candidate_byte_i");
let source_byte = format!("{prefix}_source_byte");
let macro_name_byte = format!("{prefix}_macro_name_byte");
vec![
Node::let_bind(&hash_name, name_hash),
Node::let_bind(
&probe_slot,
Expr::bitand(
Expr::mul(Expr::var(&hash_name), Expr::u32(2_654_435_769)),
Expr::u32(MACRO_TABLE_MASK),
),
),
Node::assign(output_var, Expr::u32(EMPTY_MACRO_SLOT)),
Node::let_bind(&lookup_done, Expr::u32(0)),
Node::let_bind(&lookup_seen_empty, Expr::u32(0)),
Node::loop_for(
probe,
Expr::u32(0),
Expr::u32(MACRO_TABLE_SLOTS),
vec![Node::if_then(
Expr::eq(Expr::var(&lookup_done), Expr::u32(0)),
vec![
Node::let_bind(
&probed_key,
Expr::load(macro_name_hashes, Expr::var(&probe_slot)),
),
Node::if_then(
Expr::eq(Expr::var(&probed_key), Expr::var(&hash_name)),
vec![
Node::let_bind(
&candidate_name_start,
Expr::load(macro_name_starts, Expr::var(&probe_slot)),
),
Node::let_bind(
&candidate_name_len,
Expr::load(macro_name_lens, Expr::var(&probe_slot)),
),
Node::let_bind(
&candidate_name_end,
Expr::add(
Expr::var(&candidate_name_start),
Expr::var(&candidate_name_len),
),
),
Node::if_then(
Expr::or(
Expr::lt(
Expr::var(&candidate_name_end),
Expr::var(&candidate_name_start),
),
Expr::gt(
Expr::var(&candidate_name_end),
Expr::buf_len(macro_name_words),
),
),
vec![Node::trap(
Expr::var(&candidate_name_end),
"macro-name-candidate-span-out-of-bounds",
)],
),
Node::let_bind(
&candidate_name_matches,
Expr::select(
Expr::eq(source_len.clone(), Expr::var(&candidate_name_len)),
Expr::u32(1),
Expr::u32(0),
),
),
Node::loop_for(
candidate_byte_i.clone(),
Expr::u32(0),
Expr::var(&candidate_name_len),
vec![Node::if_then(
Expr::eq(Expr::var(&candidate_name_matches), Expr::u32(1)),
vec![
Node::let_bind(
&source_byte,
load_macro_byte(
source_words,
source_layout,
Expr::add(
source_start.clone(),
Expr::var(&candidate_byte_i),
),
),
),
Node::let_bind(
¯o_name_byte,
load_macro_byte(
macro_name_words,
macro_name_layout,
Expr::add(
Expr::var(&candidate_name_start),
Expr::var(&candidate_byte_i),
),
),
),
Node::if_then(
Expr::ne(
Expr::var(&source_byte),
Expr::var(¯o_name_byte),
),
vec![Node::assign(
&candidate_name_matches,
Expr::u32(0),
)],
),
],
)],
),
Node::if_then(
Expr::eq(Expr::var(&candidate_name_matches), Expr::u32(1)),
vec![
Node::assign(output_var, Expr::var(&probe_slot)),
Node::assign(&lookup_done, Expr::u32(1)),
],
),
],
),
Node::if_then(
Expr::eq(Expr::var(&probed_key), Expr::u32(EMPTY_MACRO_SLOT)),
vec![
Node::assign(&lookup_seen_empty, Expr::u32(1)),
Node::assign(&lookup_done, Expr::u32(1)),
],
),
Node::assign(
&probe_slot,
Expr::bitand(
Expr::add(Expr::var(&probe_slot), Expr::u32(1)),
Expr::u32(MACRO_TABLE_MASK),
),
),
],
)],
),
Node::if_then(
Expr::and(
Expr::eq(Expr::var(output_var), Expr::u32(EMPTY_MACRO_SLOT)),
Expr::eq(Expr::var(&lookup_seen_empty), Expr::u32(0)),
),
vec![Node::trap(
Expr::var(&hash_name),
"macro-name-lookup-table-full-without-empty-slot",
)],
),
]
}
pub(super) fn emit_source_span_hash(
prefix: &str,
token_index: Expr,
in_tok_starts: &str,
in_tok_lens: &str,
source_words: &str,
source_layout: MacroByteLayout,
source_len: Expr,
output_var: &str,
) -> Vec<Node> {
let start = format!("{prefix}_start");
let len = format!("{prefix}_len");
let end = format!("{prefix}_end");
let byte_idx = format!("{prefix}_byte_idx");
let byte = format!("{prefix}_byte");
vec![
Node::let_bind(&start, Expr::load(in_tok_starts, token_index.clone())),
Node::let_bind(&len, Expr::load(in_tok_lens, token_index)),
Node::let_bind(&end, Expr::add(Expr::var(&start), Expr::var(&len))),
Node::if_then(
Expr::or(
Expr::lt(Expr::var(&end), Expr::var(&start)),
Expr::gt(Expr::var(&end), source_len),
),
vec![Node::trap(
Expr::var(&end),
"macro-name-source-span-out-of-bounds",
)],
),
Node::let_bind(output_var, fnv1a32_initial_expr()),
Node::loop_for(
byte_idx.clone(),
Expr::u32(0),
Expr::var(&len),
vec![
Node::let_bind(
&byte,
load_macro_byte(
source_words,
source_layout,
Expr::add(Expr::var(&start), Expr::var(&byte_idx)),
),
),
fnv1a32_update_byte_node(output_var, Expr::var(&byte)),
],
),
]
}