Function _mm256_mask_getmant_ph

pub unsafe fn _mm256_mask_getmant_ph<const NORM: i32, const SIGN: i32>(
    src: __m256h,
    k: u16,
    a: __m256h,
) -> __m256h

🔬This is a nightly-only experimental API. (stdarch_x86_avx512_f16)

Available on x86-64 only.

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:

_MM_MANT_SIGN_src     // sign = sign(src)
_MM_MANT_SIGN_zero    // sign = 0
_MM_MANT_SIGN_nan     // dst = NaN if sign(src) = 1

Intel’s documentation