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## _mm_mask_getmant_ph

# Function _mm_mask_getmant_ph

1.94.0 · Source

    pub fn _mm_mask_getmant_ph(
        src: __m128h,
        k: __mmask8,
        a: __m128h,
        const NORM: _MM_MANTISSA_NORM_ENUM,
        const SIGN: _MM_MANTISSA_SIGN_ENUM,
    ) -> __m128h

Available on x86-64 and target feature `avx512fp16` and target feature `avx512vl` 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:

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

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