Function core_arch::x86::_mm_extract_si64

pub unsafe fn _mm_extract_si64(x: __m128i, y: __m128i) -> __m128i

This is supported on x86 and target feature sse4a only.

Extracts the bit range specified by y from the lower 64 bits of x.

The [13:8] bits of y specify the index of the bit-range to extract. The [5:0] bits of y specify the length of the bit-range to extract. All other bits are ignored.

If the length is zero, it is interpreted as 64. If the length and index are zero, the lower 64 bits of x are extracted.

If length == 0 && index > 0 or lenght + index > 64 the result is undefined.