Trait packed_simd_2::FromCast [−][src]
Expand description
Numeric cast from T to Self.
Note: This is a temporary workaround until the conversion traits specified > in RFC2484 are implemented.
Numeric cast between vectors with the same number of lanes, such that:
-
casting integer vectors whose lane types have the same size (e.g.
i32xN->u32xN) is a no-op, -
casting from a larger integer to a smaller integer (e.g.
u32xN->u8xN) will truncate, -
casting from a smaller integer to a larger integer (e.g.
u8xN->u32xN) will:- zero-extend if the source is unsigned, or
- sign-extend if the source is signed,
-
casting from a float to an integer will round the float towards zero,
-
casting from an integer to float will produce the floating point representation of the integer, rounding to nearest, ties to even,
-
casting from an
f32to anf64is perfect and lossless, -
casting from an
f64to anf32rounds to nearest, ties to even.