Function core::arch::x86::_mm256_mask_getmant_ph
source · pub unsafe fn _mm256_mask_getmant_ph(
src: __m256h,
k: __mmask16,
a: __m256h,
const NORM: _MM_MANTISSA_NORM_ENUM,
const SIGN: _MM_MANTISSA_SIGN_ENUM,
) -> __m256h
🔬This is a nightly-only experimental API. (
stdarch_x86_avx512_f16
#127213)Available on (x86 or x86-64) and target feature
avx512fp16,avx512vl
and x86 only.Expand description
Normalize the mantissas of packed half-precision (16-bit) floating-point elements in a, and store
the results in dst using writemask k (elements are copied from src when the corresponding mask bit is not set).
This intrinsic essentially calculates ±(2^k)*|x.significand|
, where k depends on the interval range defined
by norm and the sign depends on sign and the source sign.
The mantissa is normalized to the interval specified by interv, which can take the following values:
_MM_MANT_NORM_1_2 // interval [1, 2)
_MM_MANT_NORM_p5_2 // interval [0.5, 2)
_MM_MANT_NORM_p5_1 // interval [0.5, 1)
_MM_MANT_NORM_p75_1p5 // interval [0.75, 1.5)
The sign is determined by sc which can take the following values: