Noratrieb/rustv32i
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fix

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This commit is contained in:
Graham Kelly 2025-05-05 00:02:33 +00:00
parent 4cf8082116
commit e5828c4838
1 changed files with 26 additions and 5 deletions
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31
rvdc/src/lib.rs
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@ -791,9 +791,10 @@ impl InstCode {
(self.0 << (end_span)) >> (end_span + range.start())
}
fn insert(self, range: RangeInclusive<u32>, data: u32) -> Self {
let (start,end) = (*range.start(),*range.end());
// let start = ;
let span_item = (1 << (range.end() - range.start())) - 1;
Self(self.0 & !(span_item << range.start()) | ((data & span_item) << range.start()))
let span_item = (1 << (end - start + 1)) - 1;
Self(self.0 & !(span_item << start) | ((data & span_item) << start))
}
fn immediate_s(self, mappings: &[(RangeInclusive<u32>, u32)]) -> Imm {
let mut imm = 0;
@ -807,8 +808,16 @@ impl InstCode {
Imm::new_i32(sign_extend(imm, size) as i32)
}
fn with_immediate_s(self, mappings: &[(RangeInclusive<u32>, u32)], data: Imm) -> Self {
let mut size = 0;
for (from, to) in mappings {
let this_size = from.end() - from.start() + 1;
size = size.max(*to + this_size);
}
mappings.iter().fold(self, |this, (from, to)| {
this.insert(from.clone(), data.as_u32() >> to)
this.insert(
from.clone(),
data.as_u32() >> *to,
)
})
}
@ -2114,7 +2123,13 @@ mod tests {
let i2 = Inst::decode(i, xlen);
if let Ok((i2, crate::IsCompressed::No)) = i2 {
if is_inst_supposed_to_roundtrip(&i2) {
assert_eq!(i2.encode_normal(xlen), i);
assert_eq!(
i2,
Inst::decode(i2.encode_normal(xlen), xlen)
.expect("to succeed")
.0,
"encoded inst different: {i2} from {i} encodes differently"
);
}
}
}
@ -2122,7 +2137,13 @@ mod tests {
let i = u32::MAX;
if let Ok((i2, crate::IsCompressed::No)) = i2 {
if is_inst_supposed_to_roundtrip(&i2) {
assert_eq!(i2.encode_normal(xlen), i);
assert_eq!(
i2,
Inst::decode(i2.encode_normal(xlen), xlen)
.expect("to succeed")
.0,
"encoded inst different: {i2} from {i} encodes differently"
);
}
}
}