74 lines
1.4 KiB
Rust
74 lines
1.4 KiB
Rust
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pub mod mul;
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pub mod sdiv;
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pub mod shift;
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pub mod udiv;
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/// Trait for some basic operations on integers
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pub trait Int {
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/// Returns the bitwidth of the int type
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fn bits() -> u32;
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}
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// TODO: Once i128/u128 support lands, we'll want to add impls for those as well
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impl Int for u32 {
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fn bits() -> u32 {
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32
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}
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}
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impl Int for i32 {
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fn bits() -> u32 {
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32
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}
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}
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impl Int for u64 {
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fn bits() -> u32 {
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64
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}
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}
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impl Int for i64 {
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fn bits() -> u32 {
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64
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}
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}
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/// Trait to convert an integer to/from smaller parts
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pub trait LargeInt {
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type LowHalf;
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type HighHalf;
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fn low(self) -> Self::LowHalf;
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fn high(self) -> Self::HighHalf;
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fn from_parts(low: Self::LowHalf, high: Self::HighHalf) -> Self;
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}
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// TODO: Once i128/u128 support lands, we'll want to add impls for those as well
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impl LargeInt for u64 {
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type LowHalf = u32;
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type HighHalf = u32;
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fn low(self) -> u32 {
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self as u32
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}
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fn high(self) -> u32 {
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(self >> 32) as u32
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}
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fn from_parts(low: u32, high: u32) -> u64 {
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low as u64 | ((high as u64) << 32)
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}
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}
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impl LargeInt for i64 {
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type LowHalf = u32;
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type HighHalf = i32;
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fn low(self) -> u32 {
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self as u32
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}
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fn high(self) -> i32 {
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(self >> 32) as i32
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}
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fn from_parts(low: u32, high: i32) -> i64 {
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low as i64 | ((high as i64) << 32)
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}
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}
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