Function _mm_round_ss
#[target_feature(enable = "sse4.1")]
pub fn _mm_round_ss(a: __m128, b: __m128, ROUNDING: i32) -> __m128Round the lower single-precision (32-bit) floating-point element in b
using the ROUNDING parameter, store the result as a single-precision
floating-point element in the lower element of the intrinsic result,
and copies the upper 3 packed elements from a to the upper elements
of the intrinsic result.
Rounding is done according to the rounding 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: useMXCSR.RC- see_MM_SET_ROUNDING_MODE