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Fix some shifting issues.

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This commit is contained in:
Adam Wick
2018-04-04 17:26:49 -07:00
parent 3cd37a881d
commit ceb1e9eb58
2 changed files with 16 additions and 5 deletions
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15
src/cryptonum/unsigned.rs
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@@ -890,7 +890,7 @@ mod test {
(&a << 0) == a
}
fn shr_identity(a: UCN) -> bool {
(&a << 0) == a
(&a >> 0) == a
}
fn add_identity(a: UCN) -> bool {
(&a + &UCN{ contents: vec![] }) == a
@@ -1049,6 +1049,17 @@ mod test {
let pow2 = one << b;
(&a << b) == (&a * pow2)
}
fn shl_mul_equiv(a: UCN) -> bool {
(&a << 1) == (&a * UCN::from(2 as u64)) &&
(&a << 3) == (&a * UCN::from(8 as u64)) &&
(&a << 4) == (&a * UCN::from(16 as u64)) &&
(&a << 43) == (&a * UCN::from(8796093022208 as u64))
}
fn shr_div_equiv(a: UCN) -> bool {
(&a >> 1) == (&a / UCN::from(2 as u64)) &&
(&a >> 3) == (&a / UCN::from(8 as u64)) &&
(&a >> 4) == (&a / UCN::from(16 as u64)) &&
(&a >> 43) == (&a / UCN::from(8796093022208 as u64))
}
}
}