fn byteSwap(r: *Mutable, a: Const, signedness: Signedness, byte_count: usize) void

r = @byteSwap(a) with 2s-complement semantics. r and a may be aliases.

Asserts the result fits in r. Upper bound on the number of limbs needed by r is calcTwosCompLimbCount(8*byte_count).

Parameters

r: *Mutable,
a: Const,
signedness: Signedness,
byte_count: usize,