Skip to content

Improved implementation of nativeint -> u128 #46

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
1arie1 merged 1 commit into from
Mar 28, 2026
Merged

Improved implementation of nativeint -> u128 #46

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
16 changes: 12 additions & 4 deletions cvlr-mathint/src/nativeint_u64.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -34,6 +34,7 @@ mod rt_decls {
pub fn CVT_nativeint_u64_nondet() -> u64;

pub fn CVT_nativeint_u64_from_u128(w0: u64, w1: u64) -> u64;
pub fn CVT_nativeint_u64_into_u128(_: u64) -> u128;
pub fn CVT_nativeint_u64_from_u256(w0: u64, w1: u64, w2: u64, w3: u64) -> u64;

pub fn CVT_nativeint_u64_u64_max() -> u64;
Expand Down Expand Up @@ -114,6 +115,11 @@ mod rt_impls {
w0
}

#[no_mangle]
pub extern "C" fn CVT_nativeint_u64_into_u128(a: u64) -> u128 {
a as u128
}

#[no_mangle]
pub extern "C" fn CVT_nativeint_u64_from_u256(w0: u64, w1: u64, w2: u64, w3: u64) -> u64 {
if w1 != 0 || w2 != 0 || w3 != 0 {
Expand Down Expand Up @@ -211,6 +217,11 @@ impl NativeIntU64 {
unsafe { Self(CVT_nativeint_u64_from_u128(w0, w1)) }
}

pub fn into_u128(self) -> u128 {
cvlr_asserts::cvlr_assume!(self.is_u128());
unsafe { CVT_nativeint_u64_into_u128(self.0) }
}

pub fn from_u256(w0: u64, w1: u64, w2: u64, w3: u64) -> Self {
unsafe { Self(CVT_nativeint_u64_from_u256(w0, w1, w2, w3)) }
}
Expand Down Expand Up @@ -518,10 +529,7 @@ impl From<NativeIntU64> for u64 {

impl From<NativeIntU64> for u128 {
fn from(value: NativeIntU64) -> Self {
cvlr_asserts::cvlr_assume!(value.is_u128());
let res: u128 = cvlr_nondet::nondet();
cvlr_asserts::cvlr_assume!(value == res);
res
value.into_u128()
}
}

Expand Down
Loading