Function `_mm_cvt_roundsd_u64`

#[target_feature(enable = "avx512f")]
pub fn _mm_cvt_roundsd_u64(a: __m128d, ROUNDING: i32) -> u64

Convert the lower double-precision (64-bit) floating-point element in a to an unsigned 64-bit integer, and store the result in dst.
Rounding is done according to the rounding[3:0] parameter, which can be one of:\

_MM_FROUND_TO_NEAREST_INT | _MM_FROUND_NO_EXC : round to nearest and suppress exceptions
_MM_FROUND_TO_NEG_INF | _MM_FROUND_NO_EXC : round down and suppress exceptions
_MM_FROUND_TO_POS_INF | _MM_FROUND_NO_EXC : round up and suppress exceptions
_MM_FROUND_TO_ZERO | _MM_FROUND_NO_EXC : truncate and suppress exceptions
_MM_FROUND_CUR_DIRECTION : use MXCSR.RC - see _MM_SET_ROUNDING_MODE

Intel's documentation