# Function std::intrinsics::wrapping_mul

const: 1.40.0 · source · ```
pub const extern "rust-intrinsic" fn wrapping_mul<T>(a: T, b: T) -> Twhere
T: Copy,
```

🔬This is a nightly-only experimental API. (

`core_intrinsics`

)## Expand description

Returns (a * b) mod 2^{N}, where N is the width of T in bits.

Note that, unlike most intrinsics, this is safe to call;
it does not require an `unsafe`

block.
Therefore, implementations must not require the user to uphold
any safety invariants.

The stabilized versions of this intrinsic are available on the integer
primitives via the `wrapping_mul`

method. For example,
`u32::wrapping_mul`