Function _mm512_mask_fcmadd_round_pch
#[target_feature(enable = "avx512fp16")]
pub fn _mm512_mask_fcmadd_round_pch(a: __m512h, k: __mmask16, b: __m512h, c: __m512h, ROUNDING: i32) -> __m512hMultiply packed complex numbers in a by the complex conjugates of packed complex numbers in b, accumulate
to the corresponding complex numbers in c, and store the results in dst using writemask k (the element is
copied from a when the corresponding mask bit is not set). Each complex number is composed of two adjacent
half-precision (16-bit) floating-point elements, which defines the complex number complex = vec.fp16[0] + i * vec.fp16[1],
or the complex conjugate conjugate = vec.fp16[0] - i * vec.fp16[1].
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