Update src/fixed.jl

Co-Authored-By: kimikage <kimikage.ceo@gmail.com>

Author: timholy

src/fixed.jl

@@ -173,7 +173,7 @@ Base.unsafe_length(r::AbstractUnitRange{F}) where {F <: Fixed{T,f}} where {T<:Si
 Base.length(r::AbstractUnitRange{F}) where {F <: Fixed{<:SShorterThanInt,f}} where {f} =
     Base.unsafe_length(r)
 Base.length(r::AbstractUnitRange{F}) where {F <: Fixed{T,f}} where {T<:Signed,f} =
-    checked_add(checked_sub(T(reinterpret(last(r)) >> f), T(reinterpret(first(r)) >> f)), oneunit(T))
+    checked_add(checked_sub(floor(T, last(r)), floor(T, first(r))), oneunit(T))
 
 promote_rule(ft::Type{Fixed{T,f}}, ::Type{TI}) where {T,f,TI <: Integer} = Fixed{T,f}
 promote_rule(::Type{Fixed{T,f}}, ::Type{TF}) where {T,f,TF <: AbstractFloat} = TF