Function core::arch::x86_64::_bittestandset64

pub unsafe fn _bittestandset64(p: *mut i64, b: i64) -> u8

🔬 This is a nightly-only experimental API. (simd_x86_bittest #59414)

This is supported on x86-64 only.

Returns the bit in position b of the memory addressed by p, then sets the bit to 1.