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fix(simulator): store a localized wide-RHS def to its C local #3167

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Merged
dalance merged 1 commit into from
Aug 10, 2026
+9 −0
Merged

fix(simulator): store a localized wide-RHS def to its C local #3167

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9 changes: 9 additions & 0 deletions crates/simulator/src/backend/aot_c/emit.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -3753,6 +3753,15 @@ pub fn emit_stmt(stmt: &ProtoStatement) -> Option<String> {
let mut pre = String::new();
let r = emit_wide_operand(eff_expr, native_bytes(src_w), &mut pre)?;
let dwmask = width_mask(a.dst_width);
// A localized dst is read back through its C local, not
// comb_values — the value must land in the local.
if is_localized(store_off) {
return Some(format!(
"{{ {pre}{nm} = (uint64_t)(VW_RD({src}, 0) & 0x{dwmask:x}ULL); }}",
nm = local_name(store_off),
src = r.addr,
));
}
return Some(format!(
"{{ {pre}*(({cty}*)(comb_values + {store_off:#x})) = \
({cty})(VW_RD({src}, 0) & 0x{dwmask:x}ULL); }}",
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