Function _mm256_round_pd
#[target_feature(enable = "avx")]
pub fn _mm256_round_pd(a: __m256d, ROUNDING: i32) -> __m256dRounds packed double-precision (64-bit) floating point elements in a
according to the flag ROUNDING. The value of ROUNDING may be as follows:
0x00: Round to the nearest whole number.0x01: Round down, toward negative infinity.0x02: Round up, toward positive infinity.0x03: Truncate the values.
For a complete list of options, check the LLVM docs.