Function core::arch::x86_64::_mm512_mask_fcmul_round_pch
source · pub unsafe fn _mm512_mask_fcmul_round_pch(
src: __m512h,
k: __mmask16,
a: __m512h,
b: __m512h,
const ROUNDING: i32,
) -> __m512h
🔬This is a nightly-only experimental API. (
stdarch_x86_avx512_f16
#127213)Available on (x86 or x86-64) and target feature
avx512fp16
and x86-64 only.Expand description
Multiply packed complex numbers in a by the complex conjugates of packed complex numbers in b, and
store the results in dst using writemask k (the element is copied from src when 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