Count non-zero bytes with the selected SIMD backend

Demonstration kernel for the runtime dispatch template. count_nonzero() counts bytes that are not 00 in a raw vector using the currently selected backend. The default backend is "auto", which selects the best compiled backend supported by the current CPU/runtime.

Usage

count_nonzero(x)

Arguments

x

A raw vector.

Value

A double scalar giving the count of non-zero bytes. The return type is double rather than integer to accommodate vectors longer than .Machine$integer.max without overflow.

Examples

count_nonzero(as.raw(c(0, 1, 0, 2)))
#> [1] 2