/// Returns the bit in position `b` of the memory addressed by `p`.
#[inline]
#[cfg_attr(test, assert_instr(bt))]
-#[unstable(feature = "simd_x86_bittest", issue = "59414")]
+#[stable(feature = "simd_x86_bittest", since = "1.55.0")]
pub unsafe fn _bittest64(p: *const i64, b: i64) -> u8 {
let r: u8;
asm!(
/// Returns the bit in position `b` of the memory addressed by `p`, then sets the bit to `1`.
#[inline]
#[cfg_attr(test, assert_instr(bts))]
-#[unstable(feature = "simd_x86_bittest", issue = "59414")]
+#[stable(feature = "simd_x86_bittest", since = "1.55.0")]
pub unsafe fn _bittestandset64(p: *mut i64, b: i64) -> u8 {
let r: u8;
asm!(
/// Returns the bit in position `b` of the memory addressed by `p`, then resets that bit to `0`.
#[inline]
#[cfg_attr(test, assert_instr(btr))]
-#[unstable(feature = "simd_x86_bittest", issue = "59414")]
+#[stable(feature = "simd_x86_bittest", since = "1.55.0")]
pub unsafe fn _bittestandreset64(p: *mut i64, b: i64) -> u8 {
let r: u8;
asm!(
/// Returns the bit in position `b` of the memory addressed by `p`, then inverts that bit.
#[inline]
#[cfg_attr(test, assert_instr(btc))]
-#[unstable(feature = "simd_x86_bittest", issue = "59414")]
+#[stable(feature = "simd_x86_bittest", since = "1.55.0")]
pub unsafe fn _bittestandcomplement64(p: *mut i64, b: i64) -> u8 {
let r: u8;
asm!(