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